summaryrefslogtreecommitdiffstats
path: root/net
Commit message (Collapse)AuthorAgeFilesLines
* xfrm: Make set-mark default behavior backward compatibleBenedict Wong2019-02-151-1/+4
| | | | | | | | | | | | | | | | | | | | | | | commit e2612cd496e7b465711d219ea6118893d7253f52 upstream. Fixes 9b42c1f179a6, which changed the default route lookup behavior for tunnel mode SAs in the outbound direction to use the skb mark, whereas previously mark=0 was used if the output mark was unspecified. In mark-based routing schemes such as Android’s, this change in default behavior causes routing loops or lookup failures. This patch restores the default behavior of using a 0 mark while still incorporating the skb mark if the SET_MARK (and SET_MARK_MASK) is specified. Tested with additions to Android's kernel unit test suite: https://android-review.googlesource.com/c/kernel/tests/+/860150 Fixes: 9b42c1f179a6 ("xfrm: Extend the output_mark to support input direction and masking") Signed-off-by: Benedict Wong <benedictwong@google.com> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* SUNRPC: Always drop the XPRT_LOCK on XPRT_CLOSE_WAITBenjamin Coddington2019-02-151-2/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch is only appropriate for stable kernels v4.16 - v4.19 Since commit 9b30889c548a ("SUNRPC: Ensure we always close the socket after a connection shuts down"), and until commit c544577daddb ("SUNRPC: Clean up transport write space handling"), it is possible for the NFS client to spin in the following tight loop: 269.964083: rpc_task_run_action: task:43@0 flags=5a81 state=0005 status=0 action=call_bind [sunrpc] 269.964083: rpc_task_run_action: task:43@0 flags=5a81 state=0005 status=0 action=call_connect [sunrpc] 269.964083: rpc_task_run_action: task:43@0 flags=5a81 state=0005 status=0 action=call_transmit [sunrpc] 269.964085: xprt_transmit: peer=[10.0.1.82]:2049 xid=0x761d3f77 status=-32 269.964085: rpc_task_run_action: task:43@0 flags=5a81 state=0005 status=-32 action=call_transmit_status [sunrpc] 269.964085: rpc_task_run_action: task:43@0 flags=5a81 state=0005 status=-32 action=call_status [sunrpc] 269.964085: rpc_call_status: task:43@0 status=-32 The issue is that the path through call_transmit_status does not release the XPRT_LOCK when the transmit result is -EPIPE, so the socket cannot be properly shut down. The below commit fixed things up in mainline by unconditionally calling xprt_end_transmit() and releasing the XPRT_LOCK after every pass through call_transmit. However, the entirety of this commit is not appropriate for stable kernels because its original inclusion was part of a series that modifies the sunrpc code to use a different queueing model. As a result, there are machinations within this patch that are not needed for a stable fix and will not make sense without a larger backport of the mainline series. In this patch, we take the slightly modified bit of the mainline patch below, which is to release the XPRT_LOCK on transmission error should we detect that the transport is waiting to close. commit c544577daddb618c7dd5fa7fb98d6a41782f020e upstream Author: Trond Myklebust <trond.myklebust@hammerspace.com> Date: Mon Sep 3 23:39:27 2018 -0400 SUNRPC: Clean up transport write space handling Treat socket write space handling in the same way we now treat transport congestion: by denying the XPRT_LOCK until the transport signals that it has free buffer space. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> The original discussion of the problem is here: https://lore.kernel.org/linux-nfs/20181212135157.4489-1-dwysocha@redhat.com/T/#t This passes my usual cthon and xfstests on NFS as applied on v4.19 mainline. Reported-by: Dave Wysochanski <dwysocha@redhat.com> Suggested-by: Trond Myklebust <trondmy@hammerspace.com> Signed-off-by: Benjamin Coddington <bcodding@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* mac80211: ensure that mgmt tx skbs have tailroom for encryptionFelix Fietkau2019-02-151-3/+9
| | | | | | | | | | | | | | | | | | | commit 9d0f50b80222dc273e67e4e14410fcfa4130a90c upstream. Some drivers use IEEE80211_KEY_FLAG_SW_MGMT_TX to indicate that management frames need to be software encrypted. Since normal data packets are still encrypted by the hardware, crypto_tx_tailroom_needed_cnt gets decremented after key upload to hw. This can lead to passing skbs to ccmp_encrypt_skb, which don't have the necessary tailroom for software encryption. Change the code to add tailroom for encrypted management packets, even if crypto_tx_tailroom_needed_cnt is 0. Cc: stable@vger.kernel.org Signed-off-by: Felix Fietkau <nbd@nbd.name> Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* sctp: walk the list of asoc safelyGreg Kroah-Hartman2019-02-121-2/+2
| | | | | | | | | | | | | | | | | [ Upstream commit ba59fb0273076637f0add4311faa990a5eec27c0 ] In sctp_sendmesg(), when walking the list of endpoint associations, the association can be dropped from the list, making the list corrupt. Properly handle this by using list_for_each_entry_safe() Fixes: 4910280503f3 ("sctp: add support for snd flag SCTP_SENDALL process in sendmsg") Reported-by: Secunia Research <vuln@secunia.com> Tested-by: Secunia Research <vuln@secunia.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Acked-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* sctp: check and update stream->out_curr when allocating stream_outXin Long2019-02-121-0/+20
| | | | | | | | | | | | | | | | | | | | | | | | | | | [ Upstream commit cfe4bd7a257f6d6f81d3458d8c9d9ec4957539e6 ] Now when using stream reconfig to add out streams, stream->out will get re-allocated, and all old streams' information will be copied to the new ones and the old ones will be freed. So without stream->out_curr updated, next time when trying to send from stream->out_curr stream, a panic would be caused. This patch is to check and update stream->out_curr when allocating stream_out. v1->v2: - define fa_index() to get elem index from stream->out_curr. v2->v3: - repost with no change. Fixes: 5bbbbe32a431 ("sctp: introduce stream scheduler foundations") Reported-by: Ying Xu <yinxu@redhat.com> Reported-by: syzbot+e33a3a138267ca119c7d@syzkaller.appspotmail.com Signed-off-by: Xin Long <lucien.xin@gmail.com> Acked-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* rxrpc: bad unlock balance in rxrpc_recvmsgEric Dumazet2019-02-121-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | [ Upstream commit 6dce3c20ac429e7a651d728e375853370c796e8d ] When either "goto wait_interrupted;" or "goto wait_error;" paths are taken, socket lock has already been released. This patch fixes following syzbot splat : WARNING: bad unlock balance detected! 5.0.0-rc4+ #59 Not tainted ------------------------------------- syz-executor223/8256 is trying to release lock (sk_lock-AF_RXRPC) at: [<ffffffff86651353>] rxrpc_recvmsg+0x6d3/0x3099 net/rxrpc/recvmsg.c:598 but there are no more locks to release! other info that might help us debug this: 1 lock held by syz-executor223/8256: #0: 00000000fa9ed0f4 (slock-AF_RXRPC){+...}, at: spin_lock_bh include/linux/spinlock.h:334 [inline] #0: 00000000fa9ed0f4 (slock-AF_RXRPC){+...}, at: release_sock+0x20/0x1c0 net/core/sock.c:2798 stack backtrace: CPU: 1 PID: 8256 Comm: syz-executor223 Not tainted 5.0.0-rc4+ #59 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x172/0x1f0 lib/dump_stack.c:113 print_unlock_imbalance_bug kernel/locking/lockdep.c:3391 [inline] print_unlock_imbalance_bug.cold+0x114/0x123 kernel/locking/lockdep.c:3368 __lock_release kernel/locking/lockdep.c:3601 [inline] lock_release+0x67e/0xa00 kernel/locking/lockdep.c:3860 sock_release_ownership include/net/sock.h:1471 [inline] release_sock+0x183/0x1c0 net/core/sock.c:2808 rxrpc_recvmsg+0x6d3/0x3099 net/rxrpc/recvmsg.c:598 sock_recvmsg_nosec net/socket.c:794 [inline] sock_recvmsg net/socket.c:801 [inline] sock_recvmsg+0xd0/0x110 net/socket.c:797 __sys_recvfrom+0x1ff/0x350 net/socket.c:1845 __do_sys_recvfrom net/socket.c:1863 [inline] __se_sys_recvfrom net/socket.c:1859 [inline] __x64_sys_recvfrom+0xe1/0x1a0 net/socket.c:1859 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x446379 Code: e8 2c b3 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fe5da89fd98 EFLAGS: 00000246 ORIG_RAX: 000000000000002d RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 0000000000446379 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c R13: 0000000000000000 R14: 0000000000000000 R15: 20c49ba5e353f7cf Fixes: 248f219cb8bc ("rxrpc: Rewrite the data and ack handling code") Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: David Howells <dhowells@redhat.com> Reported-by: syzbot <syzkaller@googlegroups.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* rds: fix refcount bug in rds_sock_addrefEric Dumazet2019-02-121-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | [ Upstream commit 6fa19f5637a6c22bc0999596bcc83bdcac8a4fa6 ] syzbot was able to catch a bug in rds [1] The issue here is that the socket might be found in a hash table but that its refcount has already be set to 0 by another cpu. We need to use refcount_inc_not_zero() to be safe here. [1] refcount_t: increment on 0; use-after-free. WARNING: CPU: 1 PID: 23129 at lib/refcount.c:153 refcount_inc_checked lib/refcount.c:153 [inline] WARNING: CPU: 1 PID: 23129 at lib/refcount.c:153 refcount_inc_checked+0x61/0x70 lib/refcount.c:151 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 23129 Comm: syz-executor3 Not tainted 5.0.0-rc4+ #53 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1db/0x2d0 lib/dump_stack.c:113 panic+0x2cb/0x65c kernel/panic.c:214 __warn.cold+0x20/0x48 kernel/panic.c:571 report_bug+0x263/0x2b0 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:178 [inline] fixup_bug arch/x86/kernel/traps.c:173 [inline] do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:271 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:290 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:973 RIP: 0010:refcount_inc_checked lib/refcount.c:153 [inline] RIP: 0010:refcount_inc_checked+0x61/0x70 lib/refcount.c:151 Code: 1d 51 63 c8 06 31 ff 89 de e8 eb 1b f2 fd 84 db 75 dd e8 a2 1a f2 fd 48 c7 c7 60 9f 81 88 c6 05 31 63 c8 06 01 e8 af 65 bb fd <0f> 0b eb c1 90 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 41 54 49 RSP: 0018:ffff8880a0cbf1e8 EFLAGS: 00010282 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc90006113000 RDX: 000000000001047d RSI: ffffffff81685776 RDI: 0000000000000005 RBP: ffff8880a0cbf1f8 R08: ffff888097c9e100 R09: ffffed1015ce5021 R10: ffffed1015ce5020 R11: ffff8880ae728107 R12: ffff8880723c20c0 R13: ffff8880723c24b0 R14: dffffc0000000000 R15: ffffed1014197e64 sock_hold include/net/sock.h:647 [inline] rds_sock_addref+0x19/0x20 net/rds/af_rds.c:675 rds_find_bound+0x97c/0x1080 net/rds/bind.c:82 rds_recv_incoming+0x3be/0x1430 net/rds/recv.c:362 rds_loop_xmit+0xf3/0x2a0 net/rds/loop.c:96 rds_send_xmit+0x1355/0x2a10 net/rds/send.c:355 rds_sendmsg+0x323c/0x44e0 net/rds/send.c:1368 sock_sendmsg_nosec net/socket.c:621 [inline] sock_sendmsg+0xdd/0x130 net/socket.c:631 __sys_sendto+0x387/0x5f0 net/socket.c:1788 __do_sys_sendto net/socket.c:1800 [inline] __se_sys_sendto net/socket.c:1796 [inline] __x64_sys_sendto+0xe1/0x1a0 net/socket.c:1796 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458089 Code: 6d b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 3b b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fc266df8c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000000458089 RDX: 0000000000000000 RSI: 00000000204b3fff RDI: 0000000000000005 RBP: 000000000073bf00 R08: 00000000202b4000 R09: 0000000000000010 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc266df96d4 R13: 00000000004c56e4 R14: 00000000004d94a8 R15: 00000000ffffffff Fixes: cc4dfb7f70a3 ("rds: fix two RCU related problems") Signed-off-by: Eric Dumazet <edumazet@google.com> Reported-by: syzbot <syzkaller@googlegroups.com> Cc: Sowmini Varadhan <sowmini.varadhan@oracle.com> Cc: Santosh Shilimkar <santosh.shilimkar@oracle.com> Cc: rds-devel@oss.oracle.com Cc: Cong Wang <xiyou.wangcong@gmail.com> Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* net: dsa: slave: Don't propagate flag changes on down slave interfacesRundong Ge2019-02-121-5/+8
| | | | | | | | | | | | | | | | | | | | | | | | [ Upstream commit 17ab4f61b8cd6f9c38e9d0b935d86d73b5d0d2b5 ] The unbalance of master's promiscuity or allmulti will happen after ifdown and ifup a slave interface which is in a bridge. When we ifdown a slave interface , both the 'dsa_slave_close' and 'dsa_slave_change_rx_flags' will clear the master's flags. The flags of master will be decrease twice. In the other hand, if we ifup the slave interface again, since the slave's flags were cleared the 'dsa_slave_open' won't set the master's flag, only 'dsa_slave_change_rx_flags' that triggered by 'br_add_if' will set the master's flags. The flags of master is increase once. Only propagating flag changes when a slave interface is up makes sure this does not happen. The 'vlan_dev_change_rx_flags' had the same problem and was fixed, and changes here follows that fix. Fixes: 91da11f870f0 ("net: Distributed Switch Architecture protocol support") Signed-off-by: Rundong Ge <rdong.ge@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* net: dsa: Fix NULL checking in dsa_slave_set_eee()Dan Carpenter2019-02-121-2/+2
| | | | | | | | | | | | | | [ Upstream commit 00670cb8a73b10b10d3c40f045c15411715e4465 ] This function can't succeed if dp->pl is NULL. It will Oops inside the call to return phylink_ethtool_get_eee(dp->pl, e); Fixes: 1be52e97ed3e ("dsa: slave: eee: Allow ports to use phylink") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Reviewed-by: Vivien Didelot <vivien.didelot@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* net: dsa: Fix lockdep false positive splatMarc Zyngier2019-02-121-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | [ Upstream commit c8101f7729daee251f4f6505f9d135ec08e1342f ] Creating a macvtap on a DSA-backed interface results in the following splat when lockdep is enabled: [ 19.638080] IPv6: ADDRCONF(NETDEV_CHANGE): lan0: link becomes ready [ 23.041198] device lan0 entered promiscuous mode [ 23.043445] device eth0 entered promiscuous mode [ 23.049255] [ 23.049557] ============================================ [ 23.055021] WARNING: possible recursive locking detected [ 23.060490] 5.0.0-rc3-00013-g56c857a1b8d3 #118 Not tainted [ 23.066132] -------------------------------------------- [ 23.071598] ip/2861 is trying to acquire lock: [ 23.076171] 00000000f61990cb (_xmit_ETHER){+...}, at: dev_set_rx_mode+0x1c/0x38 [ 23.083693] [ 23.083693] but task is already holding lock: [ 23.089696] 00000000ecf0c3b4 (_xmit_ETHER){+...}, at: dev_uc_add+0x24/0x70 [ 23.096774] [ 23.096774] other info that might help us debug this: [ 23.103494] Possible unsafe locking scenario: [ 23.103494] [ 23.109584] CPU0 [ 23.112093] ---- [ 23.114601] lock(_xmit_ETHER); [ 23.117917] lock(_xmit_ETHER); [ 23.121233] [ 23.121233] *** DEADLOCK *** [ 23.121233] [ 23.127325] May be due to missing lock nesting notation [ 23.127325] [ 23.134315] 2 locks held by ip/2861: [ 23.137987] #0: 000000003b766c72 (rtnl_mutex){+.+.}, at: rtnetlink_rcv_msg+0x338/0x4e0 [ 23.146231] #1: 00000000ecf0c3b4 (_xmit_ETHER){+...}, at: dev_uc_add+0x24/0x70 [ 23.153757] [ 23.153757] stack backtrace: [ 23.158243] CPU: 0 PID: 2861 Comm: ip Not tainted 5.0.0-rc3-00013-g56c857a1b8d3 #118 [ 23.166212] Hardware name: Globalscale Marvell ESPRESSOBin Board (DT) [ 23.172843] Call trace: [ 23.175358] dump_backtrace+0x0/0x188 [ 23.179116] show_stack+0x14/0x20 [ 23.182524] dump_stack+0xb4/0xec [ 23.185928] __lock_acquire+0x123c/0x1860 [ 23.190048] lock_acquire+0xc8/0x248 [ 23.193724] _raw_spin_lock_bh+0x40/0x58 [ 23.197755] dev_set_rx_mode+0x1c/0x38 [ 23.201607] dev_set_promiscuity+0x3c/0x50 [ 23.205820] dsa_slave_change_rx_flags+0x5c/0x70 [ 23.210567] __dev_set_promiscuity+0x148/0x1e0 [ 23.215136] __dev_set_rx_mode+0x74/0x98 [ 23.219167] dev_uc_add+0x54/0x70 [ 23.222575] macvlan_open+0x170/0x1d0 [ 23.226336] __dev_open+0xe0/0x160 [ 23.229830] __dev_change_flags+0x16c/0x1b8 [ 23.234132] dev_change_flags+0x20/0x60 [ 23.238074] do_setlink+0x2d0/0xc50 [ 23.241658] __rtnl_newlink+0x5f8/0x6e8 [ 23.245601] rtnl_newlink+0x50/0x78 [ 23.249184] rtnetlink_rcv_msg+0x360/0x4e0 [ 23.253397] netlink_rcv_skb+0xe8/0x130 [ 23.257338] rtnetlink_rcv+0x14/0x20 [ 23.261012] netlink_unicast+0x190/0x210 [ 23.265043] netlink_sendmsg+0x288/0x350 [ 23.269075] sock_sendmsg+0x18/0x30 [ 23.272659] ___sys_sendmsg+0x29c/0x2c8 [ 23.276602] __sys_sendmsg+0x60/0xb8 [ 23.280276] __arm64_sys_sendmsg+0x1c/0x28 [ 23.284488] el0_svc_common+0xd8/0x138 [ 23.288340] el0_svc_handler+0x24/0x80 [ 23.292192] el0_svc+0x8/0xc This looks fairly harmless (no actual deadlock occurs), and is fixed in a similar way to c6894dec8ea9 ("bridge: fix lockdep addr_list_lock false positive splat") by putting the addr_list_lock in its own lockdep class. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* dccp: fool proof ccid_hc_[rt]x_parse_options()Eric Dumazet2019-02-121-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | [ Upstream commit 9b1f19d810e92d6cdc68455fbc22d9f961a58ce1 ] Similarly to commit 276bdb82dedb ("dccp: check ccid before dereferencing") it is wise to test for a NULL ccid. kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 5.0.0-rc3+ #37 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:ccid_hc_tx_parse_options net/dccp/ccid.h:205 [inline] RIP: 0010:dccp_parse_options+0x8d9/0x12b0 net/dccp/options.c:233 Code: c5 0f b6 75 b3 80 38 00 0f 85 d6 08 00 00 48 b9 00 00 00 00 00 fc ff df 48 8b 45 b8 4c 8b b8 f8 07 00 00 4c 89 f8 48 c1 e8 03 <80> 3c 08 00 0f 85 95 08 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b kobject: 'loop5' (0000000080f78fc1): kobject_uevent_env RSP: 0018:ffff8880a94df0b8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff8880858ac723 RCX: dffffc0000000000 RDX: 0000000000000100 RSI: 0000000000000007 RDI: 0000000000000001 RBP: ffff8880a94df140 R08: 0000000000000001 R09: ffff888061b83a80 R10: ffffed100c370752 R11: ffff888061b83a97 R12: 0000000000000026 R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0defa33518 CR3: 000000008db5e000 CR4: 00000000001406e0 kobject: 'loop5' (0000000080f78fc1): fill_kobj_path: path = '/devices/virtual/block/loop5' DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: dccp_rcv_state_process+0x2b6/0x1af6 net/dccp/input.c:654 dccp_v4_do_rcv+0x100/0x190 net/dccp/ipv4.c:688 sk_backlog_rcv include/net/sock.h:936 [inline] __sk_receive_skb+0x3a9/0xea0 net/core/sock.c:473 dccp_v4_rcv+0x10cb/0x1f80 net/dccp/ipv4.c:880 ip_protocol_deliver_rcu+0xb6/0xa20 net/ipv4/ip_input.c:208 ip_local_deliver_finish+0x23b/0x390 net/ipv4/ip_input.c:234 NF_HOOK include/linux/netfilter.h:289 [inline] NF_HOOK include/linux/netfilter.h:283 [inline] ip_local_deliver+0x1f0/0x740 net/ipv4/ip_input.c:255 dst_input include/net/dst.h:450 [inline] ip_rcv_finish+0x1f4/0x2f0 net/ipv4/ip_input.c:414 NF_HOOK include/linux/netfilter.h:289 [inline] NF_HOOK include/linux/netfilter.h:283 [inline] ip_rcv+0xed/0x620 net/ipv4/ip_input.c:524 __netif_receive_skb_one_core+0x160/0x210 net/core/dev.c:4973 __netif_receive_skb+0x2c/0x1c0 net/core/dev.c:5083 process_backlog+0x206/0x750 net/core/dev.c:5923 napi_poll net/core/dev.c:6346 [inline] net_rx_action+0x76d/0x1930 net/core/dev.c:6412 __do_softirq+0x30b/0xb11 kernel/softirq.c:292 run_ksoftirqd kernel/softirq.c:654 [inline] run_ksoftirqd+0x8e/0x110 kernel/softirq.c:646 smpboot_thread_fn+0x6ab/0xa10 kernel/smpboot.c:164 kthread+0x357/0x430 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Modules linked in: ---[ end trace 58a0ba03bea2c376 ]--- RIP: 0010:ccid_hc_tx_parse_options net/dccp/ccid.h:205 [inline] RIP: 0010:dccp_parse_options+0x8d9/0x12b0 net/dccp/options.c:233 Code: c5 0f b6 75 b3 80 38 00 0f 85 d6 08 00 00 48 b9 00 00 00 00 00 fc ff df 48 8b 45 b8 4c 8b b8 f8 07 00 00 4c 89 f8 48 c1 e8 03 <80> 3c 08 00 0f 85 95 08 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b RSP: 0018:ffff8880a94df0b8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff8880858ac723 RCX: dffffc0000000000 RDX: 0000000000000100 RSI: 0000000000000007 RDI: 0000000000000001 RBP: ffff8880a94df140 R08: 0000000000000001 R09: ffff888061b83a80 R10: ffffed100c370752 R11: ffff888061b83a97 R12: 0000000000000026 R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0defa33518 CR3: 0000000009871000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Signed-off-by: Eric Dumazet <edumazet@google.com> Reported-by: syzbot <syzkaller@googlegroups.com> Cc: Gerrit Renker <gerrit@erg.abdn.ac.uk> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* xfrm6_tunnel: Fix spi check in __xfrm6_tunnel_alloc_spiYueHaibing2019-02-121-0/+3
| | | | | | | | | | | | | | | | [ Upstream commit fa89a4593b927b3f59c3b69379f31d3b22272e4e ] gcc warn this: net/ipv6/xfrm6_tunnel.c:143 __xfrm6_tunnel_alloc_spi() warn: always true condition '(spi <= 4294967295) => (0-u32max <= u32max)' 'spi' is u32, which always not greater than XFRM6_TUNNEL_SPI_MAX because of wrap around. So the second forloop will never reach. Signed-off-by: YueHaibing <yuehaibing@huawei.com> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
* mac80211: fix radiotap vendor presence bitmap handlingJohannes Berg2019-02-121-2/+3
| | | | | | | | | | | | | | | | | | [ Upstream commit efc38dd7d5fa5c8cdd0c917c5d00947aa0539443 ] Due to the alignment handling, it actually matters where in the code we add the 4 bytes for the presence bitmap to the length; the first field is the timestamp with 8 byte alignment so we need to add the space for the extra vendor namespace presence bitmap *before* we do any alignment for the fields. Move the presence bitmap length accounting to the right place to fix the alignment for the data properly. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Luca Coelho <luciano.coelho@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
* tipc: fix node keep alive interval calculationHoang Le2019-02-121-0/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | [ Upstream commit f5d6c3e5a359c0507800e7ac68d565c21de9b5a1 ] When setting LINK tolerance, node timer interval will be calculated base on the LINK with lowest tolerance. But when calculated, the old node timer interval only updated if current setting value (tolerance/4) less than old ones regardless of number of links as well as links' lowest tolerance value. This caused to two cases missing if tolerance changed as following: Case 1: 1.1/ There is one link (L1) available in the system 1.2/ Set L1's tolerance from 1500ms => lower (i.e 500ms) 1.3/ Then, fallback to default (1500ms) or higher (i.e 2000ms) Expected: node timer interval is 1500/4=375ms after 1.3 Result: node timer interval will not being updated after changing tolerance at 1.3 since its value 1500/4=375ms is not less than 500/4=125ms at 1.2. Case 2: 2.1/ There are two links (L1, L2) available in the system 2.2/ L1 and L2 tolerance value are 2000ms as initial 2.3/ Set L2's tolerance from 2000ms => lower 1500ms 2.4/ Disable link L2 (bring down its bearer) Expected: node timer interval is 2000ms/4=500ms after 2.4 Result: node timer interval will not being updated after disabling L2 since its value 2000ms/4=500ms is still not less than 1500/4=375ms at 2.3 although L2 is already not available in the system. To fix this, we start the node interval calculation by initializing it to a value larger than any conceivable calculated value. This way, the link with the lowest tolerance will always determine the calculated value. Acked-by: Jon Maloy <jon.maloy@ericsson.com> Signed-off-by: Hoang Le <hoang.h.le@dektech.com.au> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Sasha Levin <sashal@kernel.org>
* sctp: set flow sport from saddr only when it's 0Xin Long2019-02-062-2/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | [ Upstream commit ecf938fe7d0088077ee1280419a2b3c5429b47c8 ] Now sctp_transport_pmtu() passes transport->saddr into .get_dst() to set flow sport from 'saddr'. However, transport->saddr is set only when transport->dst exists in sctp_transport_route(). If sctp_transport_pmtu() is called without transport->saddr set, like when transport->dst doesn't exists, the flow sport will be set to 0 from transport->saddr, which will cause a wrong route to be got. Commit 6e91b578bf3f ("sctp: re-use sctp_transport_pmtu in sctp_transport_route") made the issue be triggered more easily since sctp_transport_pmtu() would be called in sctp_transport_route() after that. In gerneral, fl4->fl4_sport should always be set to htons(asoc->base.bind_addr.port), unless transport->asoc doesn't exist in sctp_v4/6_get_dst(), which is the case: sctp_ootb_pkt_new() -> sctp_transport_route() For that, we can simply handle it by setting flow sport from saddr only when it's 0 in sctp_v4/6_get_dst(). Fixes: 6e91b578bf3f ("sctp: re-use sctp_transport_pmtu in sctp_transport_route") Reported-by: Ying Xu <yinxu@redhat.com> Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* sctp: set chunk transport correctly when it's a new asocXin Long2019-02-061-3/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | [ Upstream commit 4ff40b86262b73553ee47cc3784ce8ba0f220bd8 ] In the paths: sctp_sf_do_unexpected_init() -> sctp_make_init_ack() sctp_sf_do_dupcook_a/b()() -> sctp_sf_do_5_1D_ce() The new chunk 'retval' transport is set from the incoming chunk 'chunk' transport. However, 'retval' transport belong to the new asoc, which is a different one from 'chunk' transport's asoc. It will cause that the 'retval' chunk gets set with a wrong transport. Later when sending it and because of Commit b9fd683982c9 ("sctp: add sctp_packet_singleton"), sctp_packet_singleton() will set some fields, like vtag to 'retval' chunk from that wrong transport's asoc. This patch is to fix it by setting 'retval' transport correctly which belongs to the right asoc in sctp_make_init_ack() and sctp_sf_do_5_1D_ce(). Fixes: b9fd683982c9 ("sctp: add sctp_packet_singleton") Reported-by: Ying Xu <yinxu@redhat.com> Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* ip6mr: Fix notifiers call on mroute_clean_tables()Nir Dotan2019-02-061-4/+3Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | [ Upstream commit 146820cc240f4389cf33481c058d9493aef95e25 ] When the MC route socket is closed, mroute_clean_tables() is called to cleanup existing routes. Mistakenly notifiers call was put on the cleanup of the unresolved MC route entries cache. In a case where the MC socket closes before an unresolved route expires, the notifier call leads to a crash, caused by the driver trying to increment a non initialized refcount_t object [1] and then when handling is done, to decrement it [2]. This was detected by a test recently added in commit 6d4efada3b82 ("selftests: forwarding: Add multicast routing test"). Fix that by putting notifiers call on the resolved entries traversal, instead of on the unresolved entries traversal. [1] [ 245.748967] refcount_t: increment on 0; use-after-free. [ 245.754829] WARNING: CPU: 3 PID: 3223 at lib/refcount.c:153 refcount_inc_checked+0x2b/0x30 ... [ 245.802357] Hardware name: Mellanox Technologies Ltd. MSN2740/SA001237, BIOS 5.6.5 06/07/2016 [ 245.811873] RIP: 0010:refcount_inc_checked+0x2b/0x30 ... [ 245.907487] Call Trace: [ 245.910231] mlxsw_sp_router_fib_event.cold.181+0x42/0x47 [mlxsw_spectrum] [ 245.917913] notifier_call_chain+0x45/0x7 [ 245.922484] atomic_notifier_call_chain+0x15/0x20 [ 245.927729] call_fib_notifiers+0x15/0x30 [ 245.932205] mroute_clean_tables+0x372/0x3f [ 245.936971] ip6mr_sk_done+0xb1/0xc0 [ 245.940960] ip6_mroute_setsockopt+0x1da/0x5f0 ... [2] [ 246.128487] refcount_t: underflow; use-after-free. [ 246.133859] WARNING: CPU: 0 PID: 7 at lib/refcount.c:187 refcount_sub_and_test_checked+0x4c/0x60 [ 246.183521] Hardware name: Mellanox Technologies Ltd. MSN2740/SA001237, BIOS 5.6.5 06/07/2016 ... [ 246.193062] Workqueue: mlxsw_core_ordered mlxsw_sp_router_fibmr_event_work [mlxsw_spectrum] [ 246.202394] RIP: 0010:refcount_sub_and_test_checked+0x4c/0x60 ... [ 246.298889] Call Trace: [ 246.301617] refcount_dec_and_test_checked+0x11/0x20 [ 246.307170] mlxsw_sp_router_fibmr_event_work.cold.196+0x47/0x78 [mlxsw_spectrum] [ 246.315531] process_one_work+0x1fa/0x3f0 [ 246.320005] worker_thread+0x2f/0x3e0 [ 246.324083] kthread+0x118/0x130 [ 246.327683] ? wq_update_unbound_numa+0x1b0/0x1b0 [ 246.332926] ? kthread_park+0x80/0x80 [ 246.337013] ret_from_fork+0x1f/0x30 Fixes: 088aa3eec2ce ("ip6mr: Support fib notifications") Signed-off-by: Nir Dotan <nird@mellanox.com> Reviewed-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* sctp: improve the events for sctp stream addingXin Long2019-02-061-11/+8Star
| | | | | | | | | | | | | | | | | | | | | [ Upstream commit 8220c870cb0f4eaa4e335c9645dbd9a1c461c1dd ] This patch is to improve sctp stream adding events in 2 places: 1. In sctp_process_strreset_addstrm_out(), move up SCTP_MAX_STREAM and in stream allocation failure checks, as the adding has to succeed after reconf_timer stops for the in stream adding request retransmission. 3. In sctp_process_strreset_addstrm_in(), no event should be sent, as no in or out stream is added here. Fixes: 50a41591f110 ("sctp: implement receiver-side procedures for the Add Outgoing Streams Request Parameter") Fixes: c5c4ebb3ab87 ("sctp: implement receiver-side procedures for the Add Incoming Streams Request Parameter") Reported-by: Ying Xu <yinxu@redhat.com> Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* net: ip6_gre: always reports o_key to userspaceLorenzo Bianconi2019-02-061-1/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | [ Upstream commit c706863bc8902d0c2d1a5a27ac8e1ead5d06b79d ] As Erspan_v4, Erspan_v6 protocol relies on o_key to configure session id header field. However TUNNEL_KEY bit is cleared in ip6erspan_tunnel_xmit since ERSPAN protocol does not set the key field of the external GRE header and so the configured o_key is not reported to userspace. The issue can be triggered with the following reproducer: $ip link add ip6erspan1 type ip6erspan local 2000::1 remote 2000::2 \ key 1 seq erspan_ver 1 $ip link set ip6erspan1 up ip -d link sh ip6erspan1 ip6erspan1@NONE: <BROADCAST,MULTICAST> mtu 1422 qdisc noop state DOWN mode DEFAULT link/ether ba:ff:09:24:c3:0e brd ff:ff:ff:ff:ff:ff promiscuity 0 minmtu 68 maxmtu 1500 ip6erspan remote 2000::2 local 2000::1 encaplimit 4 flowlabel 0x00000 ikey 0.0.0.1 iseq oseq Fix the issue adding TUNNEL_KEY bit to the o_flags parameter in ip6gre_fill_info Fixes: 5a963eb61b7c ("ip6_gre: Add ERSPAN native tunnel support") Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* sctp: improve the events for sctp stream resetXin Long2019-02-061-22/+17Star
| | | | | | | | | | | | | | | | | | | | | | | | | | [ Upstream commit 2e6dc4d95110becfe0ff4c3d4749c33ea166e9e7 ] This patch is to improve sctp stream reset events in 4 places: 1. In sctp_process_strreset_outreq(), the flag should always be set with SCTP_STREAM_RESET_INCOMING_SSN instead of OUTGOING, as receiver's in stream is reset here. 2. In sctp_process_strreset_outreq(), move up SCTP_STRRESET_ERR_WRONG_SSN check, as the reset has to succeed after reconf_timer stops for the in stream reset request retransmission. 3. In sctp_process_strreset_inreq(), no event should be sent, as no in or out stream is reset here. 4. In sctp_process_strreset_resp(), SCTP_STREAM_RESET_INCOMING_SSN or OUTGOING event should always be sent for stream reset requests, no matter it fails or succeeds to process the request. Fixes: 810544764536 ("sctp: implement receiver-side procedures for the Outgoing SSN Reset Request Parameter") Fixes: 16e1a91965b0 ("sctp: implement receiver-side procedures for the Incoming SSN Reset Request Parameter") Fixes: 11ae76e67a17 ("sctp: implement receiver-side procedures for the Reconf Response Parameter") Reported-by: Ying Xu <yinxu@redhat.com> Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* net: set default network namespace in init_dummy_netdev()Josh Elsasser2019-02-061-0/+3
| | | | | | | | | | | | | | | | | | | | | | | [ Upstream commit 35edfdc77f683c8fd27d7732af06cf6489af60a5 ] Assign a default net namespace to netdevs created by init_dummy_netdev(). Fixes a NULL pointer dereference caused by busy-polling a socket bound to an iwlwifi wireless device, which bumps the per-net BUSYPOLLRXPACKETS stat if napi_poll() received packets: BUG: unable to handle kernel NULL pointer dereference at 0000000000000190 IP: napi_busy_loop+0xd6/0x200 Call Trace: sock_poll+0x5e/0x80 do_sys_poll+0x324/0x5a0 SyS_poll+0x6c/0xf0 do_syscall_64+0x6b/0x1f0 entry_SYSCALL_64_after_hwframe+0x3d/0xa2 Fixes: 7db6b048da3b ("net: Commonize busy polling code to focus on napi_id instead of socket") Signed-off-by: Josh Elsasser <jelsasser@appneta.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* net/rose: fix NULL ax25_cb kernel panicBernard Pidoux2019-02-061-0/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | [ Upstream commit b0cf029234f9b18e10703ba5147f0389c382bccc ] When an internally generated frame is handled by rose_xmit(), rose_route_frame() is called: if (!rose_route_frame(skb, NULL)) { dev_kfree_skb(skb); stats->tx_errors++; return NETDEV_TX_OK; } We have the same code sequence in Net/Rom where an internally generated frame is handled by nr_xmit() calling nr_route_frame(skb, NULL). However, in this function NULL argument is tested while it is not in rose_route_frame(). Then kernel panic occurs later on when calling ax25cmp() with a NULL ax25_cb argument as reported many times and recently with syzbot. We need to test if ax25 is NULL before using it. Testing: Built kernel with CONFIG_ROSE=y. Signed-off-by: Bernard Pidoux <f6bvp@free.fr> Acked-by: Dmitry Vyukov <dvyukov@google.com> Reported-by: syzbot+1a2c456a1ea08fa5b5f7@syzkaller.appspotmail.com Cc: "David S. Miller" <davem@davemloft.net> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Bernard Pidoux <f6bvp@free.fr> Cc: linux-hams@vger.kernel.org Cc: netdev@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* netrom: switch to sock timer APICong Wang2019-02-061-10/+10
| | | | | | | | | | | | | | | [ Upstream commit 63346650c1a94a92be61a57416ac88c0a47c4327 ] sk_reset_timer() and sk_stop_timer() properly handle sock refcnt for timer function. Switching to them could fix a refcounting bug reported by syzbot. Reported-and-tested-by: syzbot+defa700d16f1bd1b9a05@syzkaller.appspotmail.com Cc: Ralf Baechle <ralf@linux-mips.org> Cc: linux-hams@vger.kernel.org Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* net: ip_gre: use erspan key field for tunnel lookupLorenzo Bianconi2019-02-063-13/+17
| | | | | | | | | | | | | | | [ Upstream commit cb73ee40b1b381eaf3749e6dbeed567bb38e5258 ] Use ERSPAN key header field as tunnel key in gre_parse_header routine since ERSPAN protocol sets the key field of the external GRE header to 0 resulting in a tunnel lookup fail in ip6gre_err. In addition remove key field parsing and pskb_may_pull check in erspan_rcv and ip6erspan_rcv Fixes: 5a963eb61b7c ("ip6_gre: Add ERSPAN native tunnel support") Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* net: ip_gre: always reports o_key to userspaceLorenzo Bianconi2019-02-061-1/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | [ Upstream commit feaf5c796b3f0240f10d0d6d0b686715fd58a05b ] Erspan protocol (version 1 and 2) relies on o_key to configure session id header field. However TUNNEL_KEY bit is cleared in erspan_xmit since ERSPAN protocol does not set the key field of the external GRE header and so the configured o_key is not reported to userspace. The issue can be triggered with the following reproducer: $ip link add erspan1 type erspan local 192.168.0.1 remote 192.168.0.2 \ key 1 seq erspan_ver 1 $ip link set erspan1 up $ip -d link sh erspan1 erspan1@NONE: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1450 qdisc pfifo_fast state UNKNOWN mode DEFAULT link/ether 52:aa:99:95:9a:b5 brd ff:ff:ff:ff:ff:ff promiscuity 0 minmtu 68 maxmtu 1500 erspan remote 192.168.0.2 local 192.168.0.1 ttl inherit ikey 0.0.0.1 iseq oseq erspan_index 0 Fix the issue adding TUNNEL_KEY bit to the o_flags parameter in ipgre_fill_info Fixes: 84e54fe0a5ea ("gre: introduce native tunnel support for ERSPAN") Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* l2tp: fix reading optional fields of L2TPv3Jacob Wen2019-02-064-0/+30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | [ Upstream commit 4522a70db7aa5e77526a4079628578599821b193 ] Use pskb_may_pull() to make sure the optional fields are in skb linear parts, so we can safely read them later. It's easy to reproduce the issue with a net driver that supports paged skb data. Just create a L2TPv3 over IP tunnel and then generates some network traffic. Once reproduced, rx err in /sys/kernel/debug/l2tp/tunnels will increase. Changes in v4: 1. s/l2tp_v3_pull_opt/l2tp_v3_ensure_opt_in_linear/ 2. s/tunnel->version != L2TP_HDR_VER_2/tunnel->version == L2TP_HDR_VER_3/ 3. Add 'Fixes' in commit messages. Changes in v3: 1. To keep consistency, move the code out of l2tp_recv_common. 2. Use "net" instead of "net-next", since this is a bug fix. Changes in v2: 1. Only fix L2TPv3 to make code simple. To fix both L2TPv3 and L2TPv2, we'd better refactor l2tp_recv_common. It's complicated to do so. 2. Reloading pointers after pskb_may_pull Fixes: f7faffa3ff8e ("l2tp: Add L2TPv3 protocol support") Fixes: 0d76751fad77 ("l2tp: Add L2TPv3 IP encapsulation (no UDP) support") Fixes: a32e0eec7042 ("l2tp: introduce L2TPv3 IP encapsulation support for IPv6") Signed-off-by: Jacob Wen <jian.w.wen@oracle.com> Acked-by: Guillaume Nault <gnault@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* l2tp: copy 4 more bytes to linear part if necessaryJacob Wen2019-02-061-3/+2Star
| | | | | | | | | | | | | | | | | | | | | | [ Upstream commit 91c524708de6207f59dd3512518d8a1c7b434ee3 ] The size of L2TPv2 header with all optional fields is 14 bytes. l2tp_udp_recv_core only moves 10 bytes to the linear part of a skb. This may lead to l2tp_recv_common read data outside of a skb. This patch make sure that there is at least 14 bytes in the linear part of a skb to meet the maximum need of l2tp_udp_recv_core and l2tp_recv_common. The minimum size of both PPP HDLC-like frame and Ethernet frame is larger than 14 bytes, so we are safe to do so. Also remove L2TP_HDR_SIZE_NOSEQ, it is unused now. Fixes: fd558d186df2 ("l2tp: Split pppol2tp patch into separate l2tp and ppp parts") Suggested-by: Guillaume Nault <gnault@redhat.com> Signed-off-by: Jacob Wen <jian.w.wen@oracle.com> Acked-by: Guillaume Nault <gnault@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* ipv6: sr: clear IP6CB(skb) on SRH ip4ip6 encapsulationYohei Kanemaru2019-02-061-0/+2
| | | | | | | | | | | | | | | | | | [ Upstream commit ef489749aae508e6f17886775c075f12ff919fb1 ] skb->cb may contain data from previous layers (in an observed case IPv4 with L3 Master Device). In the observed scenario, the data in IPCB(skb)->frags was misinterpreted as IP6CB(skb)->frag_max_size, eventually caused an unexpected IPv6 fragmentation in ip6_fragment() through ip6_finish_output(). This patch clears IP6CB(skb), which potentially contains garbage data, on the SRH ip4ip6 encapsulation. Fixes: 32d99d0b6702 ("ipv6: sr: add support for ip4ip6 encapsulation") Signed-off-by: Yohei Kanemaru <yohei.kanemaru@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* ipv6: Consider sk_bound_dev_if when binding a socket to an addressDavid Ahern2019-02-061-0/+3
| | | | | | | | | | | | | | | | | [ Upstream commit c5ee066333ebc322a24a00a743ed941a0c68617e ] IPv6 does not consider if the socket is bound to a device when binding to an address. The result is that a socket can be bound to eth0 and then bound to the address of eth1. If the device is a VRF, the result is that a socket can only be bound to an address in the default VRF. Resolve by considering the device if sk_bound_dev_if is set. This problem exists from the beginning of git history. Signed-off-by: David Ahern <dsahern@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* Fix "net: ipv4: do not handle duplicate fragments as overlapping"Greg Kroah-Hartman2019-02-061-1/+1
| | | | | | | | | | | | | | | | ade446403bfb ("net: ipv4: do not handle duplicate fragments as overlapping") was backported to many stable trees, but it had a problem that was "accidentally" fixed by the upstream commit 0ff89efb5246 ("ip: fail fast on IP defrag errors") This is the fixup for that problem as we do not want the larger patch in the older stable trees. Fixes: ade446403bfb ("net: ipv4: do not handle duplicate fragments as overlapping") Reported-by: Ivan Babrou <ivan@cloudflare.com> Reported-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* can: bcm: check timer values before ktime conversionOliver Hartkopp2019-01-311-0/+27
| | | | | | | | | | | | | | | | | | | | | | | | commit 93171ba6f1deffd82f381d36cb13177872d023f6 upstream. Kyungtae Kim detected a potential integer overflow in bcm_[rx|tx]_setup() when the conversion into ktime multiplies the given value with NSEC_PER_USEC (1000). Reference: https://marc.info/?l=linux-can&m=154732118819828&w=2 Add a check for the given tv_usec, so that the value stays below one second. Additionally limit the tv_sec value to a reasonable value for CAN related use-cases of 400 days and ensure all values to be positive. Reported-by: Kyungtae Kim <kt0755@gmail.com> Tested-by: Oliver Hartkopp <socketcan@hartkopp.net> Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net> Cc: linux-stable <stable@vger.kernel.org> # >= 2.6.26 Tested-by: Kyungtae Kim <kt0755@gmail.com> Acked-by: Andre Naujoks <nautsch2@gmail.com> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* tcp: allow MSG_ZEROCOPY transmission also in CLOSE_WAIT stateWillem de Bruijn2019-01-311-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | [ Upstream commit 13d7f46386e060df31b727c9975e38306fa51e7a ] TCP transmission with MSG_ZEROCOPY fails if the peer closes its end of the connection and so transitions this socket to CLOSE_WAIT state. Transmission in close wait state is acceptable. Other similar tests in the stack (e.g., in FastOpen) accept both states. Relax this test, too. Link: https://www.mail-archive.com/netdev@vger.kernel.org/msg276886.html Link: https://www.mail-archive.com/netdev@vger.kernel.org/msg227390.html Fixes: f214f915e7db ("tcp: enable MSG_ZEROCOPY") Reported-by: Marek Majkowski <marek@cloudflare.com> Signed-off-by: Willem de Bruijn <willemb@google.com> CC: Yuchung Cheng <ycheng@google.com> CC: Neal Cardwell <ncardwell@google.com> CC: Soheil Hassas Yeganeh <soheil@google.com> CC: Alexey Kodanev <alexey.kodanev@oracle.com> Acked-by: Soheil Hassas Yeganeh <soheil@google.com> Reviewed-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* ip6_gre: update version related info when changing linkHangbin Liu2019-01-311-0/+4
| | | | | | | | | | | | | [ Upstream commit 80b3671e9377916bf2b02e56113fa7377ce5705a ] We forgot to update ip6erspan version related info when changing link, which will cause setting new hwid failed. Reported-by: Jianlin Shi <jishi@redhat.com> Fixes: 94d7d8f292870 ("ip6_gre: add erspan v2 support") Signed-off-by: Hangbin Liu <liuhangbin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* erspan: build the header with the right proto according to erspan_verXin Long2019-01-312-11/+18
| | | | | | | | | | | | | | | | | | | [ Upstream commit 20704bd1633dd5afb29a321d3a615c9c8e9c9d05 ] As said in draft-foschiano-erspan-03#section4: Different frame variants known as "ERSPAN Types" can be distinguished based on the GRE "Protocol Type" field value: Type I and II's value is 0x88BE while Type III's is 0x22EB [ETYPES]. So set it properly in erspan_xmit() according to erspan_ver. While at it, also remove the unused parameter 'proto' in erspan_fb_xmit(). Fixes: 94d7d8f29287 ("ip6_gre: add erspan v2 support") Reported-by: Jianlin Shi <jishi@redhat.com> Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* ip6_gre: fix tunnel list corruption for x-netnsOlivier Matz2019-01-311-2/+2
| | | | | | | | | | | | | | | | | | | [ Upstream commit ab5098fa25b91cb6fe0a0676f17abb64f2bbf024 ] In changelink ops, the ip6gre_net pointer is retrieved from dev_net(dev), which is wrong in case of x-netns. Thus, the tunnel is not unlinked from its current list and is relinked into another net namespace. This corrupts the tunnel lists and can later trigger a kernel oops. Fix this by retrieving the netns from device private area. Fixes: c8632fc30bb0 ("net: ip6_gre: Split up ip6gre_changelink()") Cc: Petr Machata <petrm@mellanox.com> Signed-off-by: Olivier Matz <olivier.matz@6wind.com> Acked-by: Nicolas Dichtel <nicolas.dichtel@6wind.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* udp: with udp_segment release on error pathWillem de Bruijn2019-01-312-8/+24
| | | | | | | | | | | | | [ Upstream commit 0f149c9fec3cd720628ecde83bfc6f64c1e7dcb6 ] Failure __ip_append_data triggers udp_flush_pending_frames, but these tests happen later. The skb must be freed directly. Fixes: bec1f6f697362 ("udp: generate gso with UDP_SEGMENT") Reported-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Willem de Bruijn <willemb@google.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* net/sched: cls_flower: allocate mask dynamically in fl_change()Ivan Vecera2019-01-311-5/+14
| | | | | | | | | | | | | | | | | | | | | | | [ Upstream commit 2cddd20147826aef283115abb00012d4dafe3cdb ] Recent changes (especially 05cd271fd61a ("cls_flower: Support multiple masks per priority")) in the fl_flow_mask structure grow it and its current size e.g. on x86_64 with defconfig is 760 bytes and more than 1024 bytes with some debug options enabled. Prior the mentioned commit its size was 176 bytes (using defconfig on x86_64). With regard to this fact it's reasonable to allocate this structure dynamically in fl_change() to reduce its stack size. v2: - use kzalloc() instead of kcalloc() Fixes: 05cd271fd61a ("cls_flower: Support multiple masks per priority") Cc: Jiri Pirko <jiri@resnulli.us> Cc: Paul Blakey <paulb@mellanox.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: Ivan Vecera <ivecera@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* net: ipv4: Fix memory leak in network namespace dismantleIdo Schimmel2019-01-312-5/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | [ Upstream commit f97f4dd8b3bb9d0993d2491e0f22024c68109184 ] IPv4 routing tables are flushed in two cases: 1. In response to events in the netdev and inetaddr notification chains 2. When a network namespace is being dismantled In both cases only routes associated with a dead nexthop group are flushed. However, a nexthop group will only be marked as dead in case it is populated with actual nexthops using a nexthop device. This is not the case when the route in question is an error route (e.g., 'blackhole', 'unreachable'). Therefore, when a network namespace is being dismantled such routes are not flushed and leaked [1]. To reproduce: # ip netns add blue # ip -n blue route add unreachable 192.0.2.0/24 # ip netns del blue Fix this by not skipping error routes that are not marked with RTNH_F_DEAD when flushing the routing tables. To prevent the flushing of such routes in case #1, add a parameter to fib_table_flush() that indicates if the table is flushed as part of namespace dismantle or not. Note that this problem does not exist in IPv6 since error routes are associated with the loopback device. [1] unreferenced object 0xffff888066650338 (size 56): comm "ip", pid 1206, jiffies 4294786063 (age 26.235s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 b0 1c 62 61 80 88 ff ff ..........ba.... e8 8b a1 64 80 88 ff ff 00 07 00 08 fe 00 00 00 ...d............ backtrace: [<00000000856ed27d>] inet_rtm_newroute+0x129/0x220 [<00000000fcdfc00a>] rtnetlink_rcv_msg+0x397/0xa20 [<00000000cb85801a>] netlink_rcv_skb+0x132/0x380 [<00000000ebc991d2>] netlink_unicast+0x4c0/0x690 [<0000000014f62875>] netlink_sendmsg+0x929/0xe10 [<00000000bac9d967>] sock_sendmsg+0xc8/0x110 [<00000000223e6485>] ___sys_sendmsg+0x77a/0x8f0 [<000000002e94f880>] __sys_sendmsg+0xf7/0x250 [<00000000ccb1fa72>] do_syscall_64+0x14d/0x610 [<00000000ffbe3dae>] entry_SYSCALL_64_after_hwframe+0x49/0xbe [<000000003a8b605b>] 0xffffffffffffffff unreferenced object 0xffff888061621c88 (size 48): comm "ip", pid 1206, jiffies 4294786063 (age 26.235s) hex dump (first 32 bytes): 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk 6b 6b 6b 6b 6b 6b 6b 6b d8 8e 26 5f 80 88 ff ff kkkkkkkk..&_.... backtrace: [<00000000733609e3>] fib_table_insert+0x978/0x1500 [<00000000856ed27d>] inet_rtm_newroute+0x129/0x220 [<00000000fcdfc00a>] rtnetlink_rcv_msg+0x397/0xa20 [<00000000cb85801a>] netlink_rcv_skb+0x132/0x380 [<00000000ebc991d2>] netlink_unicast+0x4c0/0x690 [<0000000014f62875>] netlink_sendmsg+0x929/0xe10 [<00000000bac9d967>] sock_sendmsg+0xc8/0x110 [<00000000223e6485>] ___sys_sendmsg+0x77a/0x8f0 [<000000002e94f880>] __sys_sendmsg+0xf7/0x250 [<00000000ccb1fa72>] do_syscall_64+0x14d/0x610 [<00000000ffbe3dae>] entry_SYSCALL_64_after_hwframe+0x49/0xbe [<000000003a8b605b>] 0xffffffffffffffff Fixes: 8cced9eff1d4 ("[NETNS]: Enable routing configuration in non-initial namespace.") Signed-off-by: Ido Schimmel <idosch@mellanox.com> Reviewed-by: David Ahern <dsahern@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* openvswitch: Avoid OOB read when parsing flow nlattrsRoss Lagerwall2019-01-311-1/+1
| | | | | | | | | | | | | | | [ Upstream commit 04a4af334b971814eedf4e4a413343ad3287d9a9 ] For nested and variable attributes, the expected length of an attribute is not known and marked by a negative number. This results in an OOB read when the expected length is later used to check if the attribute is all zeros. Fix this by using the actual length of the attribute rather than the expected length. Signed-off-by: Ross Lagerwall <ross.lagerwall@citrix.com> Acked-by: Pravin B Shelar <pshelar@ovn.org> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* net_sched: refetch skb protocol for each filterCong Wang2019-01-311-2/+1Star
| | | | | | | | | | | | | | | | | | | | | | | | | | [ Upstream commit cd0c4e70fc0ccfa705cdf55efb27519ce9337a26 ] Martin reported a set of filters don't work after changing from reclassify to continue. Looking into the code, it looks like skb protocol is not always fetched for each iteration of the filters. But, as demonstrated by Martin, TC actions could modify skb->protocol, for example act_vlan, this means we have to refetch skb protocol in each iteration, rather than using the one we fetch in the beginning of the loop. This bug is _not_ introduced by commit 3b3ae880266d ("net: sched: consolidate tc_classify{,_compat}"), technically, if act_vlan is the only action that modifies skb protocol, then it is commit c7e2b9689ef8 ("sched: introduce vlan action") which introduced this bug. Reported-by: Martin Olsson <martin.olsson+netdev@sentorsecurity.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: Jiri Pirko <jiri@resnulli.us> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* net/sched: act_tunnel_key: fix memory leak in case of action replaceDavide Caratti2019-01-311-8/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | [ Upstream commit 9174c3df1cd181c14913138d50ccbe539bb08335 ] running the following TDC test cases: 7afc - Replace tunnel_key set action with all parameters 364d - Replace tunnel_key set action with all parameters and cookie it's possible to trigger kmemleak warnings like: unreferenced object 0xffff94797127ab40 (size 192): comm "tc", pid 3248, jiffies 4300565293 (age 1006.862s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 c0 93 f9 8a ff ff ff ff ................ 41 84 ee 89 ff ff ff ff 00 00 00 00 00 00 00 00 A............... backtrace: [<000000001e85b61c>] tunnel_key_init+0x31d/0x820 [act_tunnel_key] [<000000007f3f6ee7>] tcf_action_init_1+0x384/0x4c0 [<00000000e89e3ded>] tcf_action_init+0x12b/0x1a0 [<00000000c1c8c0f8>] tcf_action_add+0x73/0x170 [<0000000095a9fc28>] tc_ctl_action+0x122/0x160 [<000000004bebeac5>] rtnetlink_rcv_msg+0x263/0x2d0 [<000000009fd862dd>] netlink_rcv_skb+0x4a/0x110 [<00000000b55199e7>] netlink_unicast+0x1a0/0x250 [<000000004996cd21>] netlink_sendmsg+0x2c1/0x3c0 [<000000004d6a94b4>] sock_sendmsg+0x36/0x40 [<000000005d9f0208>] ___sys_sendmsg+0x280/0x2f0 [<00000000dec19023>] __sys_sendmsg+0x5e/0xa0 [<000000004b82ac81>] do_syscall_64+0x5b/0x180 [<00000000a0f1209a>] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [<000000002926b2ab>] 0xffffffffffffffff when the tunnel_key action is replaced, the kernel forgets to release the dst metadata: ensure they are released by tunnel_key_init(), the same way it's done in tunnel_key_release(). Fixes: d0f6dd8a914f4 ("net/sched: Introduce act_tunnel_key") Signed-off-by: Davide Caratti <dcaratti@redhat.com> Acked-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* net: Fix usage of pskb_trim_rcsumRoss Lagerwall2019-01-313-0/+3
| | | | | | | | | | | | | [ Upstream commit 6c57f0458022298e4da1729c67bd33ce41c14e7a ] In certain cases, pskb_trim_rcsum() may change skb pointers. Reinitialize header pointers afterwards to avoid potential use-after-frees. Add a note in the documentation of pskb_trim_rcsum(). Found by KASAN. Signed-off-by: Ross Lagerwall <ross.lagerwall@citrix.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* net: bridge: Fix ethernet header pointer before check skb forwardableYunjian Wang2019-01-311-5/+4Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | [ Upstream commit 28c1382fa28f2e2d9d0d6f25ae879b5af2ecbd03 ] The skb header should be set to ethernet header before using is_skb_forwardable. Because the ethernet header length has been considered in is_skb_forwardable(including dev->hard_header_len length). To reproduce the issue: 1, add 2 ports on linux bridge br using following commands: $ brctl addbr br $ brctl addif br eth0 $ brctl addif br eth1 2, the MTU of eth0 and eth1 is 1500 3, send a packet(Data 1480, UDP 8, IP 20, Ethernet 14, VLAN 4) from eth0 to eth1 So the expect result is packet larger than 1500 cannot pass through eth0 and eth1. But currently, the packet passes through success, it means eth1's MTU limit doesn't take effect. Fixes: f6367b4660dd ("bridge: use is_skb_forwardable in forward path") Cc: bridge@lists.linux-foundation.org Cc: Nkolay Aleksandrov <nikolay@cumulusnetworks.com> Cc: Roopa Prabhu <roopa@cumulusnetworks.com> Cc: Stephen Hemminger <stephen@networkplumber.org> Signed-off-by: Yunjian Wang <wangyunjian@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* Bluetooth: Fix unnecessary error message for HCI request completionJohan Hedberg2019-01-261-0/+6
| | | | | | | | | | | | | | | | | | | commit 1629db9c75342325868243d6bca5853017d91cf8 upstream. In case a command which completes in Command Status was sent using the hci_cmd_send-family of APIs there would be a misleading error in the hci_get_cmd_complete function, since the code would be trying to fetch the Command Complete parameters when there are none. Avoid the misleading error and silently bail out from the function in case the received event is a command status. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Acked-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Tested-by Adam Ford <aford173@gmail.com> #4.19.16 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* netfilter: ipt_CLUSTERIP: fix deadlock in netns exit routineTaehee Yoo2019-01-261-68/+87
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | [ Upstream commit 5a86d68bcf02f2d1e9a5897dd482079fd5f75e7f ] When network namespace is destroyed, cleanup_net() is called. cleanup_net() holds pernet_ops_rwsem then calls each ->exit callback. So that clusterip_tg_destroy() is called by cleanup_net(). And clusterip_tg_destroy() calls unregister_netdevice_notifier(). But both cleanup_net() and clusterip_tg_destroy() hold same lock(pernet_ops_rwsem). hence deadlock occurrs. After this patch, only 1 notifier is registered when module is inserted. And all of configs are added to per-net list. test commands: %ip netns add vm1 %ip netns exec vm1 bash %ip link set lo up %iptables -A INPUT -p tcp -i lo -d 192.168.0.5 --dport 80 \ -j CLUSTERIP --new --hashmode sourceip \ --clustermac 01:00:5e:00:00:20 --total-nodes 2 --local-node 1 %exit %ip netns del vm1 splat looks like: [ 341.809674] ============================================ [ 341.809674] WARNING: possible recursive locking detected [ 341.809674] 4.19.0-rc5+ #16 Tainted: G W [ 341.809674] -------------------------------------------- [ 341.809674] kworker/u4:2/87 is trying to acquire lock: [ 341.809674] 000000005da2d519 (pernet_ops_rwsem){++++}, at: unregister_netdevice_notifier+0x8c/0x460 [ 341.809674] [ 341.809674] but task is already holding lock: [ 341.809674] 000000005da2d519 (pernet_ops_rwsem){++++}, at: cleanup_net+0x119/0x900 [ 341.809674] [ 341.809674] other info that might help us debug this: [ 341.809674] Possible unsafe locking scenario: [ 341.809674] [ 341.809674] CPU0 [ 341.809674] ---- [ 341.809674] lock(pernet_ops_rwsem); [ 341.809674] lock(pernet_ops_rwsem); [ 341.809674] [ 341.809674] *** DEADLOCK *** [ 341.809674] [ 341.809674] May be due to missing lock nesting notation [ 341.809674] [ 341.809674] 3 locks held by kworker/u4:2/87: [ 341.809674] #0: 00000000d9df6c92 ((wq_completion)"%s""netns"){+.+.}, at: process_one_work+0xafe/0x1de0 [ 341.809674] #1: 00000000c2cbcee2 (net_cleanup_work){+.+.}, at: process_one_work+0xb60/0x1de0 [ 341.809674] #2: 000000005da2d519 (pernet_ops_rwsem){++++}, at: cleanup_net+0x119/0x900 [ 341.809674] [ 341.809674] stack backtrace: [ 341.809674] CPU: 1 PID: 87 Comm: kworker/u4:2 Tainted: G W 4.19.0-rc5+ #16 [ 341.809674] Workqueue: netns cleanup_net [ 341.809674] Call Trace: [ ... ] [ 342.070196] down_write+0x93/0x160 [ 342.070196] ? unregister_netdevice_notifier+0x8c/0x460 [ 342.070196] ? down_read+0x1e0/0x1e0 [ 342.070196] ? sched_clock_cpu+0x126/0x170 [ 342.070196] ? find_held_lock+0x39/0x1c0 [ 342.070196] unregister_netdevice_notifier+0x8c/0x460 [ 342.070196] ? register_netdevice_notifier+0x790/0x790 [ 342.070196] ? __local_bh_enable_ip+0xe9/0x1b0 [ 342.070196] ? __local_bh_enable_ip+0xe9/0x1b0 [ 342.070196] ? clusterip_tg_destroy+0x372/0x650 [ipt_CLUSTERIP] [ 342.070196] ? trace_hardirqs_on+0x93/0x210 [ 342.070196] ? __bpf_trace_preemptirq_template+0x10/0x10 [ 342.070196] ? clusterip_tg_destroy+0x372/0x650 [ipt_CLUSTERIP] [ 342.123094] clusterip_tg_destroy+0x3ad/0x650 [ipt_CLUSTERIP] [ 342.123094] ? clusterip_net_init+0x3d0/0x3d0 [ipt_CLUSTERIP] [ 342.123094] ? cleanup_match+0x17d/0x200 [ip_tables] [ 342.123094] ? xt_unregister_table+0x215/0x300 [x_tables] [ 342.123094] ? kfree+0xe2/0x2a0 [ 342.123094] cleanup_entry+0x1d5/0x2f0 [ip_tables] [ 342.123094] ? cleanup_match+0x200/0x200 [ip_tables] [ 342.123094] __ipt_unregister_table+0x9b/0x1a0 [ip_tables] [ 342.123094] iptable_filter_net_exit+0x43/0x80 [iptable_filter] [ 342.123094] ops_exit_list.isra.10+0x94/0x140 [ 342.123094] cleanup_net+0x45b/0x900 [ ... ] Fixes: 202f59afd441 ("netfilter: ipt_CLUSTERIP: do not hold dev") Signed-off-by: Taehee Yoo <ap420073@gmail.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
* netfilter: ipt_CLUSTERIP: remove wrong WARN_ON_ONCE in netns exit routineTaehee Yoo2019-01-261-1/+0Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | [ Upstream commit b12f7bad5ad3724d19754390a3e80928525c0769 ] When network namespace is destroyed, both clusterip_tg_destroy() and clusterip_net_exit() are called. and clusterip_net_exit() is called before clusterip_tg_destroy(). Hence cleanup check code in clusterip_net_exit() doesn't make sense. test commands: %ip netns add vm1 %ip netns exec vm1 bash %ip link set lo up %iptables -A INPUT -p tcp -i lo -d 192.168.0.5 --dport 80 \ -j CLUSTERIP --new --hashmode sourceip \ --clustermac 01:00:5e:00:00:20 --total-nodes 2 --local-node 1 %exit %ip netns del vm1 splat looks like: [ 341.184508] WARNING: CPU: 1 PID: 87 at net/ipv4/netfilter/ipt_CLUSTERIP.c:840 clusterip_net_exit+0x319/0x380 [ipt_CLUSTERIP] [ 341.184850] Modules linked in: ipt_CLUSTERIP nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 xt_tcpudp iptable_filter bpfilter ip_tables x_tables [ 341.184850] CPU: 1 PID: 87 Comm: kworker/u4:2 Not tainted 4.19.0-rc5+ #16 [ 341.227509] Workqueue: netns cleanup_net [ 341.227509] RIP: 0010:clusterip_net_exit+0x319/0x380 [ipt_CLUSTERIP] [ 341.227509] Code: 0f 85 7f fe ff ff 48 c7 c2 80 64 2c c0 be a8 02 00 00 48 c7 c7 a0 63 2c c0 c6 05 18 6e 00 00 01 e8 bc 38 ff f5 e9 5b fe ff ff <0f> 0b e9 33 ff ff ff e8 4b 90 50 f6 e9 2d fe ff ff 48 89 df e8 de [ 341.227509] RSP: 0018:ffff88011086f408 EFLAGS: 00010202 [ 341.227509] RAX: dffffc0000000000 RBX: 1ffff1002210de85 RCX: 0000000000000000 [ 341.227509] RDX: 1ffff1002210de85 RSI: ffff880110813be8 RDI: ffffed002210de58 [ 341.227509] RBP: ffff88011086f4d0 R08: 0000000000000000 R09: 0000000000000000 [ 341.227509] R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff1002210de81 [ 341.227509] R13: ffff880110625a48 R14: ffff880114cec8c8 R15: 0000000000000014 [ 341.227509] FS: 0000000000000000(0000) GS:ffff880116600000(0000) knlGS:0000000000000000 [ 341.227509] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 341.227509] CR2: 00007f11fd38e000 CR3: 000000013ca16000 CR4: 00000000001006e0 [ 341.227509] Call Trace: [ 341.227509] ? __clusterip_config_find+0x460/0x460 [ipt_CLUSTERIP] [ 341.227509] ? default_device_exit+0x1ca/0x270 [ 341.227509] ? remove_proc_entry+0x1cd/0x390 [ 341.227509] ? dev_change_net_namespace+0xd00/0xd00 [ 341.227509] ? __init_waitqueue_head+0x130/0x130 [ 341.227509] ops_exit_list.isra.10+0x94/0x140 [ 341.227509] cleanup_net+0x45b/0x900 [ ... ] Fixes: 613d0776d3fe ("netfilter: exit_net cleanup check added") Signed-off-by: Taehee Yoo <ap420073@gmail.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
* netfilter: ipt_CLUSTERIP: check MAC address when duplicate config is setTaehee Yoo2019-01-261-1/+2
| | | | | | | | | | | | | | | | | | | | | | | [ Upstream commit 06aa151ad1fc74a49b45336672515774a678d78d ] If same destination IP address config is already existing, that config is just used. MAC address also should be same. However, there is no MAC address checking routine. So that MAC address checking routine is added. test commands: %iptables -A INPUT -p tcp -i lo -d 192.168.0.5 --dport 80 \ -j CLUSTERIP --new --hashmode sourceip \ --clustermac 01:00:5e:00:00:20 --total-nodes 2 --local-node 1 %iptables -A INPUT -p tcp -i lo -d 192.168.0.5 --dport 80 \ -j CLUSTERIP --new --hashmode sourceip \ --clustermac 01:00:5e:00:00:21 --total-nodes 2 --local-node 1 After this patch, above commands are disallowed. Signed-off-by: Taehee Yoo <ap420073@gmail.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
* net: call sk_dst_reset when set SO_DONTROUTEyupeng2019-01-261-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | [ Upstream commit 0fbe82e628c817e292ff588cd5847fc935e025f2 ] after set SO_DONTROUTE to 1, the IP layer should not route packets if the dest IP address is not in link scope. But if the socket has cached the dst_entry, such packets would be routed until the sk_dst_cache expires. So we should clean the sk_dst_cache when a user set SO_DONTROUTE option. Below are server/client python scripts which could reprodue this issue: server side code: ========================================================================== import socket import struct import time s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.bind(('0.0.0.0', 9000)) s.listen(1) sock, addr = s.accept() sock.setsockopt(socket.SOL_SOCKET, socket.SO_DONTROUTE, struct.pack('i', 1)) while True: sock.send(b'foo') time.sleep(1) ========================================================================== client side code: ========================================================================== import socket import time s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.connect(('server_address', 9000)) while True: data = s.recv(1024) print(data) ========================================================================== Signed-off-by: yupeng <yupeng0921@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Sasha Levin <sashal@kernel.org>
* netfilter: ipset: Allow matching on destination MAC address for mac and ↵Stefano Brivio2019-01-263-16/+20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ipmac sets [ Upstream commit 8cc4ccf58379935f3ad456cc34e61c4e4c921d0e ] There doesn't seem to be any reason to restrict MAC address matching to source MAC addresses in set types bitmap:ipmac, hash:ipmac and hash:mac. With this patch, and this setup: ip netns add A ip link add veth1 type veth peer name veth2 netns A ip addr add 192.0.2.1/24 dev veth1 ip -net A addr add 192.0.2.2/24 dev veth2 ip link set veth1 up ip -net A link set veth2 up ip netns exec A ipset create test hash:mac dst=$(ip netns exec A cat /sys/class/net/veth2/address) ip netns exec A ipset add test ${dst} ip netns exec A iptables -P INPUT DROP ip netns exec A iptables -I INPUT -m set --match-set test dst -j ACCEPT ipset will match packets based on destination MAC address: # ping -c1 192.0.2.2 >/dev/null # echo $? 0 Reported-by: Yi Chen <yiche@redhat.com> Signed-off-by: Stefano Brivio <sbrivio@redhat.com> Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> Signed-off-by: Sasha Levin <sashal@kernel.org>
* net: clear skb->tstamp in bridge forwarding pathPaolo Abeni2019-01-261-0/+1
| | | | | | | | | | | | | | | | | | | | | [ Upstream commit 41d1c8839e5f8cb781cc635f12791decee8271b7 ] Matteo reported forwarding issues inside the linux bridge, if the enslaved interfaces use the fq qdisc. Similar to commit 8203e2d844d3 ("net: clear skb->tstamp in forwarding paths"), we need to clear the tstamp field in the bridge forwarding path. Fixes: 80b14dee2bea ("net: Add a new socket option for a future transmit time.") Fixes: fb420d5d91c1 ("tcp/fq: move back to CLOCK_MONOTONIC") Reported-and-tested-by: Matteo Croce <mcroce@redhat.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com> Acked-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Acked-by: Roopa Prabhu <roopa@cumulusnetworks.com> Reviewed-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2024-07-23 06:26:14 +0200