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* net-ipv6: on device mtu change do not add mtu to mtu-less routesMaciej Żenczykowski2016-11-091-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Routes can specify an mtu explicitly or inherit the mtu from the underlying device - this inheritance is implemented in dst->ops->mtu handlers ip6_mtu() and ip6_blackhole_mtu(). Currently changing the mtu of a device adds mtu explicitly to routes using that device. ie. # ip link set dev lo mtu 65536 # ip -6 route add local 2000::1 dev lo # ip -6 route get 2000::1 local 2000::1 dev lo table local src ... metric 1024 pref medium # ip link set dev lo mtu 65535 # ip -6 route get 2000::1 local 2000::1 dev lo table local src ... metric 1024 mtu 65535 pref medium # ip link set dev lo mtu 65536 # ip -6 route get 2000::1 local 2000::1 dev lo table local src ... metric 1024 mtu 65536 pref medium # ip -6 route del local 2000::1 After this patch the route entry no longer changes unless it already has an mtu. There is no need: this inheritance is already done in ip6_mtu() # ip link set dev lo mtu 65536 # ip -6 route add local 2000::1 dev lo # ip -6 route add local 2000::2 dev lo mtu 2000 # ip -6 route get 2000::1; ip -6 route get 2000::2 local 2000::1 dev lo table local src ... metric 1024 pref medium local 2000::2 dev lo table local src ... metric 1024 mtu 2000 pref medium # ip link set dev lo mtu 65535 # ip -6 route get 2000::1; ip -6 route get 2000::2 local 2000::1 dev lo table local src ... metric 1024 pref medium local 2000::2 dev lo table local src ... metric 1024 mtu 2000 pref medium # ip link set dev lo mtu 1501 # ip -6 route get 2000::1; ip -6 route get 2000::2 local 2000::1 dev lo table local src ... metric 1024 pref medium local 2000::2 dev lo table local src ... metric 1024 mtu 1501 pref medium # ip link set dev lo mtu 65536 # ip -6 route get 2000::1; ip -6 route get 2000::2 local 2000::1 dev lo table local src ... metric 1024 pref medium local 2000::2 dev lo table local src ... metric 1024 mtu 65536 pref medium # ip -6 route del local 2000::1 # ip -6 route del local 2000::2 This is desirable because changing device mtu and then resetting it to the previous value shouldn't change the user visible routing table. Signed-off-by: Maciej Żenczykowski <maze@google.com> CC: Eric Dumazet <edumazet@google.com> Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* sock: fix sendmmsg for partial sendmsgSoheil Hassas Yeganeh2016-11-091-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | Do not send the next message in sendmmsg for partial sendmsg invocations. sendmmsg assumes that it can continue sending the next message when the return value of the individual sendmsg invocations is positive. It results in corrupting the data for TCP, SCTP, and UNIX streams. For example, sendmmsg([["abcd"], ["efgh"]]) can result in a stream of "aefgh" if the first sendmsg invocation sends only the first byte while the second sendmsg goes through. Datagram sockets either send the entire datagram or fail, so this patch affects only sockets of type SOCK_STREAM and SOCK_SEQPACKET. Fixes: 228e548e6020 ("net: Add sendmmsg socket system call") Signed-off-by: Soheil Hassas Yeganeh <soheil@google.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Willem de Bruijn <willemb@google.com> Signed-off-by: Neal Cardwell <ncardwell@google.com> Acked-by: Maciej Żenczykowski <maze@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* fib_trie: Correct /proc/net/route off by one errorAlexander Duyck2016-11-081-12/+9Star
| | | | | | | | | | | | | | | | | | | | | | | | The display of /proc/net/route has had a couple issues due to the fact that when I originally rewrote most of fib_trie I made it so that the iterator was tracking the next value to use instead of the current. In addition it had an off by 1 error where I was tracking the first piece of data as position 0, even though in reality that belonged to the SEQ_START_TOKEN. This patch updates the code so the iterator tracks the last reported position and key instead of the next expected position and key. In addition it shifts things so that all of the leaves start at 1 instead of trying to report leaves starting with offset 0 as being valid. With these two issues addressed this should resolve any off by one errors that were present in the display of /proc/net/route. Fixes: 25b97c016b26 ("ipv4: off-by-one in continuation handling in /proc/net/route") Cc: Andy Whitcroft <apw@canonical.com> Reported-by: Jason Baron <jbaron@akamai.com> Tested-by: Jason Baron <jbaron@akamai.com> Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: icmp6_send should use dst dev to determine L3 domainDavid Ahern2016-11-081-1/+1
| | | | | | | | | | icmp6_send is called in response to some event. The skb may not have the device set (skb->dev is NULL), but it is expected to have a dst set. Update icmp6_send to use the dst on the skb to determine L3 domain. Fixes: ca254490c8dfd ("net: Add VRF support to IPv6 stack") Signed-off-by: David Ahern <dsa@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sctp: assign assoc_id earlier in __sctp_connectMarcelo Ricardo Leitner2016-11-071-2/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | sctp_wait_for_connect() currently already holds the asoc to keep it alive during the sleep, in case another thread release it. But Andrey Konovalov and Dmitry Vyukov reported an use-after-free in such situation. Problem is that __sctp_connect() doesn't get a ref on the asoc and will do a read on the asoc after calling sctp_wait_for_connect(), but by then another thread may have closed it and the _put on sctp_wait_for_connect will actually release it, causing the use-after-free. Fix is, instead of doing the read after waiting for the connect, do it before so, and avoid this issue as the socket is still locked by then. There should be no issue on returning the asoc id in case of failure as the application shouldn't trust on that number in such situations anyway. This issue doesn't exist in sctp_sendmsg() path. Reported-by: Dmitry Vyukov <dvyukov@google.com> Reported-by: Andrey Konovalov <andreyknvl@google.com> Tested-by: Andrey Konovalov <andreyknvl@google.com> Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Reviewed-by: Xin Long <lucien.xin@gmail.com> Acked-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* genetlink: fix a memory leak on error pathWANG Cong2016-11-031-1/+3
| | | | | | | | | | | | | | | In __genl_register_family(), when genl_validate_assign_mc_groups() fails, we forget to free the memory we possibly allocate for family->attrbuf. Note, some callers call genl_unregister_family() to clean up on error path, it doesn't work because the family is inserted to the global list in the nearly last step. Cc: Jakub Kicinski <kubakici@wp.pl> Cc: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* ipv6: dccp: add missing bind_conflict to dccp_ipv6_mappedEric Dumazet2016-11-031-0/+1
| | | | | | | | | | | | | While fuzzing kernel with syzkaller, Andrey reported a nasty crash in inet6_bind() caused by DCCP lacking a required method. Fixes: ab1e0a13d7029 ("[SOCK] proto: Add hashinfo member to struct proto") Signed-off-by: Eric Dumazet <edumazet@google.com> Reported-by: Andrey Konovalov <andreyknvl@google.com> Tested-by: Andrey Konovalov <andreyknvl@google.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* ipv6: dccp: fix out of bound access in dccp_v6_err()Eric Dumazet2016-11-031-7/+8
| | | | | | | | | | dccp_v6_err() does not use pskb_may_pull() and might access garbage. We only need 4 bytes at the beginning of the DCCP header, like TCP, so the 8 bytes pulled in icmpv6_notify() are more than enough. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* netlink: netlink_diag_dump() runs without locksEric Dumazet2016-11-031-4/+1Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | A recent commit removed locking from netlink_diag_dump() but forgot one error case. ===================================== [ BUG: bad unlock balance detected! ] 4.9.0-rc3+ #336 Not tainted ------------------------------------- syz-executor/4018 is trying to release lock ([ 36.220068] nl_table_lock ) at: [<ffffffff82dc8683>] netlink_diag_dump+0x1a3/0x250 net/netlink/diag.c:182 but there are no more locks to release! other info that might help us debug this: 3 locks held by syz-executor/4018: #0: [ 36.220068] ( sock_diag_mutex[ 36.220068] ){+.+.+.} , at: [ 36.220068] [<ffffffff82c3873b>] sock_diag_rcv+0x1b/0x40 #1: [ 36.220068] ( sock_diag_table_mutex[ 36.220068] ){+.+.+.} , at: [ 36.220068] [<ffffffff82c38e00>] sock_diag_rcv_msg+0x140/0x3a0 #2: [ 36.220068] ( nlk->cb_mutex[ 36.220068] ){+.+.+.} , at: [ 36.220068] [<ffffffff82db6600>] netlink_dump+0x50/0xac0 stack backtrace: CPU: 1 PID: 4018 Comm: syz-executor Not tainted 4.9.0-rc3+ #336 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 ffff8800645df688 ffffffff81b46934 ffffffff84eb3e78 ffff88006ad85800 ffffffff82dc8683 ffffffff84eb3e78 ffff8800645df6b8 ffffffff812043ca dffffc0000000000 ffff88006ad85ff8 ffff88006ad85fd0 00000000ffffffff Call Trace: [< inline >] __dump_stack lib/dump_stack.c:15 [<ffffffff81b46934>] dump_stack+0xb3/0x10f lib/dump_stack.c:51 [<ffffffff812043ca>] print_unlock_imbalance_bug+0x17a/0x1a0 kernel/locking/lockdep.c:3388 [< inline >] __lock_release kernel/locking/lockdep.c:3512 [<ffffffff8120cfd8>] lock_release+0x8e8/0xc60 kernel/locking/lockdep.c:3765 [< inline >] __raw_read_unlock ./include/linux/rwlock_api_smp.h:225 [<ffffffff83fc001a>] _raw_read_unlock+0x1a/0x30 kernel/locking/spinlock.c:255 [<ffffffff82dc8683>] netlink_diag_dump+0x1a3/0x250 net/netlink/diag.c:182 [<ffffffff82db6947>] netlink_dump+0x397/0xac0 net/netlink/af_netlink.c:2110 Fixes: ad202074320c ("netlink: Use rhashtable walk interface in diag dump") Signed-off-by: Eric Dumazet <edumazet@google.com> Reported-by: Andrey Konovalov <andreyknvl@google.com> Tested-by: Andrey Konovalov <andreyknvl@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* dccp: fix out of bound access in dccp_v4_err()Eric Dumazet2016-11-031-6/+8
| | | | | | | | | | | | | | dccp_v4_err() does not use pskb_may_pull() and might access garbage. We only need 4 bytes at the beginning of the DCCP header, like TCP, so the 8 bytes pulled in icmp_socket_deliver() are more than enough. This patch might allow to process more ICMP messages, as some routers are still limiting the size of reflected bytes to 28 (RFC 792), instead of extended lengths (RFC 1812 4.3.2.3) Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* dccp: do not send reset to already closed socketsEric Dumazet2016-11-031-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Andrey reported following warning while fuzzing with syzkaller WARNING: CPU: 1 PID: 21072 at net/dccp/proto.c:83 dccp_set_state+0x229/0x290 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 21072 Comm: syz-executor Not tainted 4.9.0-rc1+ #293 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 ffff88003d4c7738 ffffffff81b474f4 0000000000000003 dffffc0000000000 ffffffff844f8b00 ffff88003d4c7804 ffff88003d4c7800 ffffffff8140c06a 0000000041b58ab3 ffffffff8479ab7d ffffffff8140beae ffffffff8140cd00 Call Trace: [< inline >] __dump_stack lib/dump_stack.c:15 [<ffffffff81b474f4>] dump_stack+0xb3/0x10f lib/dump_stack.c:51 [<ffffffff8140c06a>] panic+0x1bc/0x39d kernel/panic.c:179 [<ffffffff8111125c>] __warn+0x1cc/0x1f0 kernel/panic.c:542 [<ffffffff8111144c>] warn_slowpath_null+0x2c/0x40 kernel/panic.c:585 [<ffffffff8389e5d9>] dccp_set_state+0x229/0x290 net/dccp/proto.c:83 [<ffffffff838a0aa2>] dccp_close+0x612/0xc10 net/dccp/proto.c:1016 [<ffffffff8316bf1f>] inet_release+0xef/0x1c0 net/ipv4/af_inet.c:415 [<ffffffff82b6e89e>] sock_release+0x8e/0x1d0 net/socket.c:570 [<ffffffff82b6e9f6>] sock_close+0x16/0x20 net/socket.c:1017 [<ffffffff815256ad>] __fput+0x29d/0x720 fs/file_table.c:208 [<ffffffff81525bb5>] ____fput+0x15/0x20 fs/file_table.c:244 [<ffffffff811727d8>] task_work_run+0xf8/0x170 kernel/task_work.c:116 [< inline >] exit_task_work include/linux/task_work.h:21 [<ffffffff8111bc53>] do_exit+0x883/0x2ac0 kernel/exit.c:828 [<ffffffff811221fe>] do_group_exit+0x10e/0x340 kernel/exit.c:931 [<ffffffff81143c94>] get_signal+0x634/0x15a0 kernel/signal.c:2307 [<ffffffff81054aad>] do_signal+0x8d/0x1a30 arch/x86/kernel/signal.c:807 [<ffffffff81003a05>] exit_to_usermode_loop+0xe5/0x130 arch/x86/entry/common.c:156 [< inline >] prepare_exit_to_usermode arch/x86/entry/common.c:190 [<ffffffff81006298>] syscall_return_slowpath+0x1a8/0x1e0 arch/x86/entry/common.c:259 [<ffffffff83fc1a62>] entry_SYSCALL_64_fastpath+0xc0/0xc2 Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Fix this the same way we did for TCP in commit 565b7b2d2e63 ("tcp: do not send reset to already closed sockets") Signed-off-by: Eric Dumazet <edumazet@google.com> Reported-by: Andrey Konovalov <andreyknvl@google.com> Tested-by: Andrey Konovalov <andreyknvl@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* dccp: do not release listeners too soonEric Dumazet2016-11-033-4/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Andrey Konovalov reported following error while fuzzing with syzkaller : IPv4: Attempt to release alive inet socket ffff880068e98940 kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] SMP KASAN Modules linked in: CPU: 1 PID: 3905 Comm: a.out Not tainted 4.9.0-rc3+ #333 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 task: ffff88006b9e0000 task.stack: ffff880068770000 RIP: 0010:[<ffffffff819ead5f>] [<ffffffff819ead5f>] selinux_socket_sock_rcv_skb+0xff/0x6a0 security/selinux/hooks.c:4639 RSP: 0018:ffff8800687771c8 EFLAGS: 00010202 RAX: ffff88006b9e0000 RBX: 1ffff1000d0eee3f RCX: 1ffff1000d1d312a RDX: 1ffff1000d1d31a6 RSI: dffffc0000000000 RDI: 0000000000000010 RBP: ffff880068777360 R08: 0000000000000000 R09: 0000000000000002 R10: dffffc0000000000 R11: 0000000000000006 R12: ffff880068e98940 R13: 0000000000000002 R14: ffff880068777338 R15: 0000000000000000 FS: 00007f00ff760700(0000) GS:ffff88006cd00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020008000 CR3: 000000006a308000 CR4: 00000000000006e0 Stack: ffff8800687771e0 ffffffff812508a5 ffff8800686f3168 0000000000000007 ffff88006ac8cdfc ffff8800665ea500 0000000041b58ab3 ffffffff847b5480 ffffffff819eac60 ffff88006b9e0860 ffff88006b9e0868 ffff88006b9e07f0 Call Trace: [<ffffffff819c8dd5>] security_sock_rcv_skb+0x75/0xb0 security/security.c:1317 [<ffffffff82c2a9e7>] sk_filter_trim_cap+0x67/0x10e0 net/core/filter.c:81 [<ffffffff82b81e60>] __sk_receive_skb+0x30/0xa00 net/core/sock.c:460 [<ffffffff838bbf12>] dccp_v4_rcv+0xdb2/0x1910 net/dccp/ipv4.c:873 [<ffffffff83069d22>] ip_local_deliver_finish+0x332/0xad0 net/ipv4/ip_input.c:216 [< inline >] NF_HOOK_THRESH ./include/linux/netfilter.h:232 [< inline >] NF_HOOK ./include/linux/netfilter.h:255 [<ffffffff8306abd2>] ip_local_deliver+0x1c2/0x4b0 net/ipv4/ip_input.c:257 [< inline >] dst_input ./include/net/dst.h:507 [<ffffffff83068500>] ip_rcv_finish+0x750/0x1c40 net/ipv4/ip_input.c:396 [< inline >] NF_HOOK_THRESH ./include/linux/netfilter.h:232 [< inline >] NF_HOOK ./include/linux/netfilter.h:255 [<ffffffff8306b82f>] ip_rcv+0x96f/0x12f0 net/ipv4/ip_input.c:487 [<ffffffff82bd9fb7>] __netif_receive_skb_core+0x1897/0x2a50 net/core/dev.c:4213 [<ffffffff82bdb19a>] __netif_receive_skb+0x2a/0x170 net/core/dev.c:4251 [<ffffffff82bdb493>] netif_receive_skb_internal+0x1b3/0x390 net/core/dev.c:4279 [<ffffffff82bdb6b8>] netif_receive_skb+0x48/0x250 net/core/dev.c:4303 [<ffffffff8241fc75>] tun_get_user+0xbd5/0x28a0 drivers/net/tun.c:1308 [<ffffffff82421b5a>] tun_chr_write_iter+0xda/0x190 drivers/net/tun.c:1332 [< inline >] new_sync_write fs/read_write.c:499 [<ffffffff8151bd44>] __vfs_write+0x334/0x570 fs/read_write.c:512 [<ffffffff8151f85b>] vfs_write+0x17b/0x500 fs/read_write.c:560 [< inline >] SYSC_write fs/read_write.c:607 [<ffffffff81523184>] SyS_write+0xd4/0x1a0 fs/read_write.c:599 [<ffffffff83fc02c1>] entry_SYSCALL_64_fastpath+0x1f/0xc2 It turns out DCCP calls __sk_receive_skb(), and this broke when lookups no longer took a reference on listeners. Fix this issue by adding a @refcounted parameter to __sk_receive_skb(), so that sock_put() is used only when needed. Fixes: 3b24d854cb35 ("tcp/dccp: do not touch listener sk_refcnt under synflood") Signed-off-by: Eric Dumazet <edumazet@google.com> Reported-by: Andrey Konovalov <andreyknvl@google.com> Tested-by: Andrey Konovalov <andreyknvl@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* tcp: fix return value for partial writesEric Dumazet2016-11-031-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | After my commit, tcp_sendmsg() might restart its loop after processing socket backlog. If sk_err is set, we blindly return an error, even though we copied data to user space before. We should instead return number of bytes that could be copied, otherwise user space might resend data and corrupt the stream. This might happen if another thread is using recvmsg(MSG_ERRQUEUE) to process timestamps. Issue was diagnosed by Soheil and Willem, big kudos to them ! Fixes: d41a69f1d390f ("tcp: make tcp_sendmsg() aware of socket backlog") Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Willem de Bruijn <willemb@google.com> Cc: Soheil Hassas Yeganeh <soheil@google.com> Cc: Yuchung Cheng <ycheng@google.com> Cc: Neal Cardwell <ncardwell@google.com> Tested-by: Soheil Hassas Yeganeh <soheil@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* ipv4: allow local fragmentation in ip_finish_output_gso()Lance Richardson2016-11-034-17/+4Star
| | | | | | | | | | | | | | | | | | | | | Some configurations (e.g. geneve interface with default MTU of 1500 over an ethernet interface with 1500 MTU) result in the transmission of packets that exceed the configured MTU. While this should be considered to be a "bad" configuration, it is still allowed and should not result in the sending of packets that exceed the configured MTU. Fix by dropping the assumption in ip_finish_output_gso() that locally originated gso packets will never need fragmentation. Basic testing using iperf (observing CPU usage and bandwidth) have shown no measurable performance impact for traffic not requiring fragmentation. Fixes: c7ba65d7b649 ("net: ip: push gso skb forwarding handling down the stack") Reported-by: Jan Tluka <jtluka@redhat.com> Signed-off-by: Lance Richardson <lrichard@redhat.com> Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* tcp: fix potential memory corruptionEric Dumazet2016-11-031-1/+1
| | | | | | | | | | | | | | | | | Imagine initial value of max_skb_frags is 17, and last skb in write queue has 15 frags. Then max_skb_frags is lowered to 14 or smaller value. tcp_sendmsg() will then be allowed to add additional page frags and eventually go past MAX_SKB_FRAGS, overflowing struct skb_shared_info. Fixes: 5f74f82ea34c ("net:Add sysctl_max_skb_frags") Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Hans Westgaard Ry <hans.westgaard.ry@oracle.com> Cc: Håkon Bugge <haakon.bugge@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* inet: fix sleeping inside inet_wait_for_connect()WANG Cong2016-11-031-5/+4Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Andrey reported this kernel warning: WARNING: CPU: 0 PID: 4608 at kernel/sched/core.c:7724 __might_sleep+0x14c/0x1a0 kernel/sched/core.c:7719 do not call blocking ops when !TASK_RUNNING; state=1 set at [<ffffffff811f5a5c>] prepare_to_wait+0xbc/0x210 kernel/sched/wait.c:178 Modules linked in: CPU: 0 PID: 4608 Comm: syz-executor Not tainted 4.9.0-rc2+ #320 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 ffff88006625f7a0 ffffffff81b46914 ffff88006625f818 0000000000000000 ffffffff84052960 0000000000000000 ffff88006625f7e8 ffffffff81111237 ffff88006aceac00 ffffffff00001e2c ffffed000cc4beff ffffffff84052960 Call Trace: [< inline >] __dump_stack lib/dump_stack.c:15 [<ffffffff81b46914>] dump_stack+0xb3/0x10f lib/dump_stack.c:51 [<ffffffff81111237>] __warn+0x1a7/0x1f0 kernel/panic.c:550 [<ffffffff8111132c>] warn_slowpath_fmt+0xac/0xd0 kernel/panic.c:565 [<ffffffff811922fc>] __might_sleep+0x14c/0x1a0 kernel/sched/core.c:7719 [< inline >] slab_pre_alloc_hook mm/slab.h:393 [< inline >] slab_alloc_node mm/slub.c:2634 [< inline >] slab_alloc mm/slub.c:2716 [<ffffffff81508da0>] __kmalloc_track_caller+0x150/0x2a0 mm/slub.c:4240 [<ffffffff8146be14>] kmemdup+0x24/0x50 mm/util.c:113 [<ffffffff8388b2cf>] dccp_feat_clone_sp_val.part.5+0x4f/0xe0 net/dccp/feat.c:374 [< inline >] dccp_feat_clone_sp_val net/dccp/feat.c:1141 [< inline >] dccp_feat_change_recv net/dccp/feat.c:1141 [<ffffffff8388d491>] dccp_feat_parse_options+0xaa1/0x13d0 net/dccp/feat.c:1411 [<ffffffff83894f01>] dccp_parse_options+0x721/0x1010 net/dccp/options.c:128 [<ffffffff83891280>] dccp_rcv_state_process+0x200/0x15b0 net/dccp/input.c:644 [<ffffffff838b8a94>] dccp_v4_do_rcv+0xf4/0x1a0 net/dccp/ipv4.c:681 [< inline >] sk_backlog_rcv ./include/net/sock.h:872 [<ffffffff82b7ceb6>] __release_sock+0x126/0x3a0 net/core/sock.c:2044 [<ffffffff82b7d189>] release_sock+0x59/0x1c0 net/core/sock.c:2502 [< inline >] inet_wait_for_connect net/ipv4/af_inet.c:547 [<ffffffff8316b2a2>] __inet_stream_connect+0x5d2/0xbb0 net/ipv4/af_inet.c:617 [<ffffffff8316b8d5>] inet_stream_connect+0x55/0xa0 net/ipv4/af_inet.c:656 [<ffffffff82b705e4>] SYSC_connect+0x244/0x2f0 net/socket.c:1533 [<ffffffff82b72dd4>] SyS_connect+0x24/0x30 net/socket.c:1514 [<ffffffff83fbf701>] entry_SYSCALL_64_fastpath+0x1f/0xc2 arch/x86/entry/entry_64.S:209 Unlike commit 26cabd31259ba43f68026ce3f62b78094124333f ("sched, net: Clean up sk_wait_event() vs. might_sleep()"), the sleeping function is called before schedule_timeout(), this is indeed a bug. Fix this by moving the wait logic to the new API, it is similar to commit ff960a731788a7408b6f66ec4fd772ff18833211 ("netdev, sched/wait: Fix sleeping inside wait event"). Reported-by: Andrey Konovalov <andreyknvl@google.com> Cc: Andrey Konovalov <andreyknvl@google.com> Cc: Eric Dumazet <eric.dumazet@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* ip6_udp_tunnel: remove unused IPCB related codesEli Cooper2016-11-021-3/+0Star
| | | | | | | | | | | | | | Some IPCB fields are currently set in udp_tunnel6_xmit_skb(), which are never used before it reaches ip6tunnel_xmit(), and past that point the control buffer is no longer interpreted as IPCB. This clears these unused IPCB related codes. Currently there is no skb scrubbing in ip6_udp_tunnel, otherwise IPCB(skb)->opt might need to be cleared for IPv4 packets, as shown in 5146d1f1511 ("tunnel: Clear IPCB(skb)->opt before dst_link_failure called"). Signed-off-by: Eli Cooper <elicooper@gmx.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* unix: escape all null bytes in abstract unix domain socketIsaac Boukris2016-11-011-1/+2
| | | | | | | | | | | | | | | Abstract unix domain socket may embed null characters, these should be translated to '@' when printed out to proc the same way the null prefix is currently being translated. This helps for tools such as netstat, lsof and the proc based implementation in ss to show all the significant bytes of the name (instead of getting cut at the first null occurrence). Signed-off-by: Isaac Boukris <iboukris@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* Merge tag 'linux-can-fixes-for-4.9-20161031' of ↵David S. Miller2016-11-011-9/+23
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can Marc Kleine-Budde says: ==================== pull-request: can 2016-10-31 this is a pull request of two patches for the upcoming v4.9 release. The first patch is by Lukas Resch for the sja1000 plx_pci driver that adds support for Moxa CAN devices. The second patch is by Oliver Hartkopp and fixes a potential kernel panic in the CAN broadcast manager. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
| * can: bcm: fix warning in bcm_connect/proc_registerOliver Hartkopp2016-10-311-9/+23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Andrey Konovalov reported an issue with proc_register in bcm.c. As suggested by Cong Wang this patch adds a lock_sock() protection and a check for unsuccessful proc_create_data() in bcm_connect(). Reference: http://marc.info/?l=linux-netdev&m=147732648731237 Reported-by: Andrey Konovalov <andreyknvl@google.com> Suggested-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net> Acked-by: Cong Wang <xiyou.wangcong@gmail.com> Tested-by: Andrey Konovalov <andreyknvl@google.com> Cc: linux-stable <stable@vger.kernel.org> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
* | sctp: hold transport instead of assoc when lookup assoc in rx pathXin Long2016-10-312-17/+17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Prior to this patch, in rx path, before calling lock_sock, it needed to hold assoc when got it by __sctp_lookup_association, in case other place would free/put assoc. But in __sctp_lookup_association, it lookup and hold transport, then got assoc by transport->assoc, then hold assoc and put transport. It means it didn't hold transport, yet it was returned and later on directly assigned to chunk->transport. Without the protection of sock lock, the transport may be freed/put by other places, which would cause a use-after-free issue. This patch is to fix this issue by holding transport instead of assoc. As holding transport can make sure to access assoc is also safe, and actually it looks up assoc by searching transport rhashtable, to hold transport here makes more sense. Note that the function will be renamed later on on another patch. Signed-off-by: Xin Long <lucien.xin@gmail.com> Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | sctp: return back transport in __sctp_rcv_init_lookupXin Long2016-10-311-2/+1Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Prior to this patch, it used a local variable to save the transport that is looked up by __sctp_lookup_association(), and didn't return it back. But in sctp_rcv, it is used to initialize chunk->transport. So when hitting this, even if it found the transport, it was still initializing chunk->transport with null instead. This patch is to return the transport back through transport pointer that is from __sctp_rcv_lookup_harder(). Signed-off-by: Xin Long <lucien.xin@gmail.com> Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | sctp: hold transport instead of assoc in sctp_diagXin Long2016-10-311-4/+1Star
|/ | | | | | | | | | | | | | In sctp_transport_lookup_process(), Commit 1cceda784980 ("sctp: fix the issue sctp_diag uses lock_sock in rcu_read_lock") moved cb() out of rcu lock, but it put transport and hold assoc instead, and ignore that cb() still uses transport. It may cause a use-after-free issue. This patch is to hold transport instead of assoc there. Fixes: 1cceda784980 ("sctp: fix the issue sctp_diag uses lock_sock in rcu_read_lock") Signed-off-by: Xin Long <lucien.xin@gmail.com> Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: mangle zero checksum in skb_checksum_help()Eric Dumazet2016-10-311-1/+1
| | | | | | | | | | | | | | | | | | Sending zero checksum is ok for TCP, but not for UDP. UDPv6 receiver should by default drop a frame with a 0 checksum, and UDPv4 would not verify the checksum and might accept a corrupted packet. Simply replace such checksum by 0xffff, regardless of transport. This error was caught on SIT tunnels, but seems generic. Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Maciej Żenczykowski <maze@google.com> Cc: Willem de Bruijn <willemb@google.com> Acked-by: Maciej Żenczykowski <maze@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: clear sk_err_soft in sk_clone_lock()Eric Dumazet2016-10-311-0/+1
| | | | | | | | | | | | At accept() time, it is possible the parent has a non zero sk_err_soft, leftover from a prior error. Make sure we do not leave this value in the child, as it makes future getsockopt(SO_ERROR) calls quite unreliable. Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Soheil Hassas Yeganeh <soheil@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* dctcp: avoid bogus doubling of cwnd after lossFlorian Westphal2016-10-311-1/+12
| | | | | | | | | | | | | | | | | | | | | | | | If a congestion control module doesn't provide .undo_cwnd function, tcp_undo_cwnd_reduction() will set cwnd to tp->snd_cwnd = max(tp->snd_cwnd, tp->snd_ssthresh << 1); ... which makes sense for reno (it sets ssthresh to half the current cwnd), but it makes no sense for dctcp, which sets ssthresh based on the current congestion estimate. This can cause severe growth of cwnd (eventually overflowing u32). Fix this by saving last cwnd on loss and restore cwnd based on that, similar to cubic and other algorithms. Fixes: e3118e8359bb7c ("net: tcp: add DCTCP congestion control algorithm") Cc: Lawrence Brakmo <brakmo@fb.com> Cc: Andrew Shewmaker <agshew@gmail.com> Cc: Glenn Judd <glenn.judd@morganstanley.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: David S. Miller <davem@davemloft.net>
* ipv6: add mtu lock check in __ip6_rt_update_pmtuXin Long2016-10-311-0/+3
| | | | | | | | | | | | | Prior to this patch, ipv6 didn't do mtu lock check in ip6_update_pmtu. It leaded to that mtu lock doesn't really work when receiving the pkt of ICMPV6_PKT_TOOBIG. This patch is to add mtu lock check in __ip6_rt_update_pmtu just as ipv4 did in __ip_rt_update_pmtu. Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* ipv6: Don't use ufo handling on later transformed packetsJakub Sitnicki2016-10-311-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Similar to commit c146066ab802 ("ipv4: Don't use ufo handling on later transformed packets"), don't perform UFO on packets that will be IPsec transformed. To detect it we rely on the fact that headerlen in dst_entry is non-zero only for transformation bundles (xfrm_dst objects). Unwanted segmentation can be observed with a NETIF_F_UFO capable device, such as a dummy device: DEV=dum0 LEN=1493 ip li add $DEV type dummy ip addr add fc00::1/64 dev $DEV nodad ip link set $DEV up ip xfrm policy add dir out src fc00::1 dst fc00::2 \ tmpl src fc00::1 dst fc00::2 proto esp spi 1 ip xfrm state add src fc00::1 dst fc00::2 \ proto esp spi 1 enc 'aes' 0x0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b tcpdump -n -nn -i $DEV -t & socat /dev/zero,readbytes=$LEN udp6:[fc00::2]:$LEN tcpdump output before: IP6 fc00::1 > fc00::2: frag (0|1448) ESP(spi=0x00000001,seq=0x1), length 1448 IP6 fc00::1 > fc00::2: frag (1448|48) IP6 fc00::1 > fc00::2: ESP(spi=0x00000001,seq=0x2), length 88 ... and after: IP6 fc00::1 > fc00::2: frag (0|1448) ESP(spi=0x00000001,seq=0x1), length 1448 IP6 fc00::1 > fc00::2: frag (1448|80) Fixes: e89e9cf539a2 ("[IPv4/IPv6]: UFO Scatter-gather approach") Signed-off-by: Jakub Sitnicki <jkbs@redhat.com> Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netLinus Torvalds2016-10-3085-412/+675
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull networking fixes from David Miller: "Lots of fixes, mostly drivers as is usually the case. 1) Don't treat zero DMA address as invalid in vmxnet3, from Alexey Khoroshilov. 2) Fix element timeouts in netfilter's nft_dynset, from Anders K. Pedersen. 3) Don't put aead_req crypto struct on the stack in mac80211, from Ard Biesheuvel. 4) Several uninitialized variable warning fixes from Arnd Bergmann. 5) Fix memory leak in cxgb4, from Colin Ian King. 6) Fix bpf handling of VLAN header push/pop, from Daniel Borkmann. 7) Several VRF semantic fixes from David Ahern. 8) Set skb->protocol properly in ip6_tnl_xmit(), from Eli Cooper. 9) Socket needs to be locked in udp_disconnect(), from Eric Dumazet. 10) Div-by-zero on 32-bit fix in mlx4 driver, from Eugenia Emantayev. 11) Fix stale link state during failover in NCSCI driver, from Gavin Shan. 12) Fix netdev lower adjacency list traversal, from Ido Schimmel. 13) Propvide proper handle when emitting notifications of filter deletes, from Jamal Hadi Salim. 14) Memory leaks and big-endian issues in rtl8xxxu, from Jes Sorensen. 15) Fix DESYNC_FACTOR handling in ipv6, from Jiri Bohac. 16) Several routing offload fixes in mlxsw driver, from Jiri Pirko. 17) Fix broadcast sync problem in TIPC, from Jon Paul Maloy. 18) Validate chunk len before using it in SCTP, from Marcelo Ricardo Leitner. 19) Revert a netns locking change that causes regressions, from Paul Moore. 20) Add recursion limit to GRO handling, from Sabrina Dubroca. 21) GFP_KERNEL in irq context fix in ibmvnic, from Thomas Falcon. 22) Avoid accessing stale vxlan/geneve socket in data path, from Pravin Shelar" * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (189 commits) geneve: avoid using stale geneve socket. vxlan: avoid using stale vxlan socket. qede: Fix out-of-bound fastpath memory access net: phy: dp83848: add dp83822 PHY support enic: fix rq disable tipc: fix broadcast link synchronization problem ibmvnic: Fix missing brackets in init_sub_crq_irqs ibmvnic: Fix releasing of sub-CRQ IRQs in interrupt context Revert "ibmvnic: Fix releasing of sub-CRQ IRQs in interrupt context" arch/powerpc: Update parameters for csum_tcpudp_magic & csum_tcpudp_nofold net/mlx4_en: Save slave ethtool stats command net/mlx4_en: Fix potential deadlock in port statistics flow net/mlx4: Fix firmware command timeout during interrupt test net/mlx4_core: Do not access comm channel if it has not yet been initialized net/mlx4_en: Fix panic during reboot net/mlx4_en: Process all completions in RX rings after port goes up net/mlx4_en: Resolve dividing by zero in 32-bit system net/mlx4_core: Change the default value of enable_qos net/mlx4_core: Avoid setting ports to auto when only one port type is supported net/mlx4_core: Fix the resource-type enum in res tracker to conform to FW spec ...
| * tipc: fix broadcast link synchronization problemJon Paul Maloy2016-10-296-6/+33
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In commit 2d18ac4ba745 ("tipc: extend broadcast link initialization criteria") we tried to fix a problem with the initial synchronization of broadcast link acknowledge values. Unfortunately that solution is not sufficient to solve the issue. We have seen it happen that LINK_PROTOCOL/STATE packets with a valid non-zero unicast acknowledge number may bypass BCAST_PROTOCOL initialization, NAME_DISTRIBUTOR and other STATE packets with invalid broadcast acknowledge numbers, leading to premature opening of the broadcast link. When the bypassed packets finally arrive, they are inadvertently accepted, and the already correctly initialized acknowledge number in the broadcast receive link is overwritten by the invalid (zero) value of the said packets. After this the broadcast link goes stale. We now fix this by marking the packets where we know the acknowledge value is or may be invalid, and then ignoring the acks from those. To this purpose, we claim an unused bit in the header to indicate that the value is invalid. We set the bit to 1 in the initial BCAST_PROTOCOL synchronization packet and all initial ("bulk") NAME_DISTRIBUTOR packets, plus those LINK_PROTOCOL packets sent out before the broadcast links are fully synchronized. This minor protocol update is fully backwards compatible. Reported-by: John Thompson <thompa.atl@gmail.com> Tested-by: John Thompson <thompa.atl@gmail.com> Signed-off-by: Jon Maloy <jon.maloy@ericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| * rds: debug messages are enabled by defaultshamir rabinovitch2016-10-292-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | rds use Kconfig option called "RDS_DEBUG" to enable rds debug messages. This option cause the rds Makefile to add -DDEBUG to the rds gcc command line. When CONFIG_DYNAMIC_DEBUG is enabled, the "DEBUG" macro is used by include/linux/dynamic_debug.h to decide if dynamic debug prints should be sent by default to the kernel log. rds should not enable this macro for production builds. rds dynamic debug work as expected follow this fix. Signed-off-by: Shamir Rabinovitch <shamir.rabinovitch@oracle.com> Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com> Reviewed-by: Wengang Wang <wen.gang.wang@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| * Merge tag 'mac80211-for-davem-2016-10-27' of ↵David S. Miller2016-10-291-1/+4
| |\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211 Johannes Berg says: ==================== Just two fixes: * a fix to process all events while suspending, so any potential calls into the driver are done before it is suspended * small markup fixes for the sphinx documentation conversion that's coming into the tree via the doc tree ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
| | * cfg80211: process events caused by suspend before suspendingJohannes Berg2016-10-261-1/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When suspending without WoWLAN, cfg80211 will ask drivers to disconnect. Even when the driver does this synchronously, and immediately returns with a notification, cfg80211 schedules the handling thereof to a workqueue, and may then call back into the driver when the driver was already suspended/ing. Fix this by processing all events caused by cfg80211_leave_all() directly after that function returns. The driver still needs to do the right thing here and wait for the firmware response, but that is - at least - true for mwifiex where this occurred. Reported-by: Amitkumar Karwar <akarwar@marvell.com> Tested-by: Amitkumar Karwar <akarwar@marvell.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
| * | Merge tag 'batadv-net-for-davem-20161026' of git://git.open-mesh.org/linux-mergeDavid S. Miller2016-10-293-3/+2Star
| |\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Simon Wunderlich says: ==================== Here are three batman-adv bugfix patches: - Fix RCU usage for neighbor list, by Sven Eckelmann - Fix BATADV_DBG_ALL loglevel to include TP Meter messages, by Sven Eckelmann - Fix possible splat when disabling an interface, by Linus Luessing ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
| | * | batman-adv: fix splat on disabling an interfaceLinus Lüssing2016-10-211-1/+0Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | As long as there is still a reference for a hard interface held, there might still be a forwarding packet relying on its attributes. Therefore avoid setting hard_iface->soft_iface to NULL when disabling a hard interface. This fixes the following, potential splat: batman_adv: bat0: Interface deactivated: eth1 batman_adv: bat0: Removing interface: eth1 cgroup: new mount options do not match the existing superblock, will be ignored batman_adv: bat0: Interface deactivated: eth3 batman_adv: bat0: Removing interface: eth3 ------------[ cut here ]------------ WARNING: CPU: 3 PID: 1986 at ./net/batman-adv/bat_iv_ogm.c:549 batadv_iv_send_outstanding_bat_ogm_packet+0x145/0x643 [batman_adv] Modules linked in: batman_adv(O-) <...> CPU: 3 PID: 1986 Comm: kworker/u8:2 Tainted: G W O 4.6.0-rc6+ #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.7.5-20140531_083030-gandalf 04/01/2014 Workqueue: bat_events batadv_iv_send_outstanding_bat_ogm_packet [batman_adv] 0000000000000000 ffff88001d93bca0 ffffffff8126c26b 0000000000000000 0000000000000000 ffff88001d93bcf0 ffffffff81051615 ffff88001f19f818 000002251d93bd68 0000000000000046 ffff88001dc04a00 ffff88001becbe48 Call Trace: [<ffffffff8126c26b>] dump_stack+0x67/0x90 [<ffffffff81051615>] __warn+0xc7/0xe5 [<ffffffff8105164b>] warn_slowpath_null+0x18/0x1a [<ffffffffa0356f24>] batadv_iv_send_outstanding_bat_ogm_packet+0x145/0x643 [batman_adv] [<ffffffff8108b01f>] ? __lock_is_held+0x32/0x54 [<ffffffff810689a2>] process_one_work+0x2a8/0x4f5 [<ffffffff81068856>] ? process_one_work+0x15c/0x4f5 [<ffffffff81068df2>] worker_thread+0x1d5/0x2c0 [<ffffffff81068c1d>] ? process_scheduled_works+0x2e/0x2e [<ffffffff81068c1d>] ? process_scheduled_works+0x2e/0x2e [<ffffffff8106dd90>] kthread+0xc0/0xc8 [<ffffffff8144de82>] ret_from_fork+0x22/0x40 [<ffffffff8106dcd0>] ? __init_kthread_worker+0x55/0x55 ---[ end trace 647f9f325123dc05 ]--- What happened here is, that there was still a forw_packet (here: a BATMAN IV OGM) in the queue of eth3 with the forw_packet->if_incoming set to eth1 and the forw_packet->if_outgoing set to eth3. When eth3 is to be deactivated and removed, then this thread waits for the forw_packet queued on eth3 to finish. Because eth1 was deactivated and removed earlier and by that had forw_packet->if_incoming->soft_iface, set to NULL, the splat when trying to send/flush the OGM on eth3 occures. Fixes: c6c8fea29769 ("net: Add batman-adv meshing protocol") Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue> [sven@narfation.org: Reduced size of Oops message] Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
| | * | batman-adv: Add BATADV_DBG_TP_METER to BATADV_DBG_ALLSven Eckelmann2016-10-171-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The BATADV_DBG_ALL has to contain the bit of BATADV_DBG_TP_METER to really support all available debug messages. Fixes: 33a3bb4a3345 ("batman-adv: throughput meter implementation") Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
| | * | batman-adv: Modify neigh_list only with rcu-list functionsSven Eckelmann2016-10-171-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The batadv_hard_iface::neigh_list is accessed via rcu based primitives. Thus all operations done on it have to fulfill the requirements by RCU. So using non-RCU mechanisms like hlist_add_head is not allowed because it misses the barriers required to protect concurrent readers when accessing the data behind the pointer. Fixes: cef63419f7db ("batman-adv: add list of unique single hop neighbors per hard-interface") Signed-off-by: Sven Eckelmann <sven.eckelmann@open-mesh.com> Acked-by: Linus Lüssing <linus.luessing@c0d3.blue> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
| * | | packet: on direct_xmit, limit tso and csum to supported devicesWillem de Bruijn2016-10-292-5/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When transmitting on a packet socket with PACKET_VNET_HDR and PACKET_QDISC_BYPASS, validate device support for features requested in vnet_hdr. Drop TSO packets sent to devices that do not support TSO or have the feature disabled. Note that the latter currently do process those packets correctly, regardless of not advertising the feature. Because of SKB_GSO_DODGY, it is not sufficient to test device features with netif_needs_gso. Full validate_xmit_skb is needed. Switch to software checksum for non-TSO packets that request checksum offload if that device feature is unsupported or disabled. Note that similar to the TSO case, device drivers may perform checksum offload correctly even when not advertising it. When switching to software checksum, packets hit skb_checksum_help, which has two BUG_ON checksum not in linear segment. Packet sockets always allocate at least up to csum_start + csum_off + 2 as linear. Tested by running github.com/wdebruij/kerneltools/psock_txring_vnet.c ethtool -K eth0 tso off tx on psock_txring_vnet -d $dst -s $src -i eth0 -l 2000 -n 1 -q -v psock_txring_vnet -d $dst -s $src -i eth0 -l 2000 -n 1 -q -v -N ethtool -K eth0 tx off psock_txring_vnet -d $dst -s $src -i eth0 -l 1000 -n 1 -q -v -G psock_txring_vnet -d $dst -s $src -i eth0 -l 1000 -n 1 -q -v -G -N v2: - add EXPORT_SYMBOL_GPL(validate_xmit_skb_list) Fixes: d346a3fae3ff ("packet: introduce PACKET_QDISC_BYPASS socket option") Signed-off-by: Willem de Bruijn <willemb@google.com> Acked-by: Eric Dumazet <edumazet@google.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>
| * | | net_sched actions: use nla_parse_nested()Johannes Berg2016-10-291-2/+1Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use nla_parse_nested instead of open-coding the call to nla_parse() with the attribute data/len. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Acked-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| * | | ip6_tunnel: Update skb->protocol to ETH_P_IPV6 in ip6_tnl_xmit()Eli Cooper2016-10-291-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch updates skb->protocol to ETH_P_IPV6 in ip6_tnl_xmit() when an IPv6 header is installed to a socket buffer. This is not a cosmetic change. Without updating this value, GSO packets transmitted through an ipip6 tunnel have the protocol of ETH_P_IP and skb_mac_gso_segment() will attempt to call gso_segment() for IPv4, which results in the packets being dropped. Fixes: b8921ca83eed ("ip4ip6: Support for GSO/GRO") Signed-off-by: Eli Cooper <elicooper@gmx.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| * | | inet: Fix missing return value in inet6_hashCraig Gallek2016-10-291-2/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | As part of a series to implement faster SO_REUSEPORT lookups, commit 086c653f5862 ("sock: struct proto hash function may error") added return values to protocol hash functions and commit 496611d7b5ea ("inet: create IPv6-equivalent inet_hash function") implemented a new hash function for IPv6. However, the latter does not respect the former's convention. This properly propagates the hash errors in the IPv6 case. Fixes: 496611d7b5ea ("inet: create IPv6-equivalent inet_hash function") Reported-by: Soheil Hassas Yeganeh <soheil@google.com> Signed-off-by: Craig Gallek <kraig@google.com> Acked-by: Soheil Hassas Yeganeh <soheil@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| * | | sctp: validate chunk len before actually using itMarcelo Ricardo Leitner2016-10-291-6/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Andrey Konovalov reported that KASAN detected that SCTP was using a slab beyond the boundaries. It was caused because when handling out of the blue packets in function sctp_sf_ootb() it was checking the chunk len only after already processing the first chunk, validating only for the 2nd and subsequent ones. The fix is to just move the check upwards so it's also validated for the 1st chunk. Reported-by: Andrey Konovalov <andreyknvl@google.com> Tested-by: Andrey Konovalov <andreyknvl@google.com> Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Reviewed-by: Xin Long <lucien.xin@gmail.com> Acked-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| * | | net sched filters: fix notification of filter delete with proper handleJamal Hadi Salim2016-10-271-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Daniel says: While trying out [1][2], I noticed that tc monitor doesn't show the correct handle on delete: $ tc monitor qdisc clsact ffff: dev eno1 parent ffff:fff1 filter dev eno1 ingress protocol all pref 49152 bpf handle 0x2a [...] deleted filter dev eno1 ingress protocol all pref 49152 bpf handle 0xf3be0c80 some context to explain the above: The user identity of any tc filter is represented by a 32-bit identifier encoded in tcm->tcm_handle. Example 0x2a in the bpf filter above. A user wishing to delete, get or even modify a specific filter uses this handle to reference it. Every classifier is free to provide its own semantics for the 32 bit handle. Example: classifiers like u32 use schemes like 800:1:801 to describe the semantics of their filters represented as hash table, bucket and node ids etc. Classifiers also have internal per-filter representation which is different from this externally visible identity. Most classifiers set this internal representation to be a pointer address (which allows fast retrieval of said filters in their implementations). This internal representation is referenced with the "fh" variable in the kernel control code. When a user successfuly deletes a specific filter, by specifying the correct tcm->tcm_handle, an event is generated to user space which indicates which specific filter was deleted. Before this patch, the "fh" value was sent to user space as the identity. As an example what is shown in the sample bpf filter delete event above is 0xf3be0c80. This is infact a 32-bit truncation of 0xffff8807f3be0c80 which happens to be a 64-bit memory address of the internal filter representation (address of the corresponding filter's struct cls_bpf_prog); After this patch the appropriate user identifiable handle as encoded in the originating request tcm->tcm_handle is generated in the event. One of the cardinal rules of netlink rules is to be able to take an event (such as a delete in this case) and reflect it back to the kernel and successfully delete the filter. This patch achieves that. Note, this issue has existed since the original TC action infrastructure code patch back in 2004 as found in: https://git.kernel.org/cgit/linux/kernel/git/history/history.git/commit/ [1] http://patchwork.ozlabs.org/patch/682828/ [2] http://patchwork.ozlabs.org/patch/682829/ Fixes: 4e54c4816bfe ("[NET]: Add tc extensions infrastructure.") Reported-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| * | | flow_dissector: fix vlan tag handlingArnd Bergmann2016-10-271-5/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | gcc warns about an uninitialized pointer dereference in the vlan priority handling: net/core/flow_dissector.c: In function '__skb_flow_dissect': net/core/flow_dissector.c:281:61: error: 'vlan' may be used uninitialized in this function [-Werror=maybe-uninitialized] As pointed out by Jiri Pirko, the variable is never actually used without being initialized first as the only way it end up uninitialized is with skb_vlan_tag_present(skb)==true, and that means it does not get accessed. However, the warning hints at some related issues that I'm addressing here: - the second check for the vlan tag is different from the first one that tests the skb for being NULL first, causing both the warning and a possible NULL pointer dereference that was not entirely fixed. - The same patch that introduced the NULL pointer check dropped an earlier optimization that skipped the repeated check of the protocol type - The local '_vlan' variable is referenced through the 'vlan' pointer but the variable has gone out of scope by the time that it is accessed, causing undefined behavior Caching the result of the 'skb && skb_vlan_tag_present(skb)' check in a local variable allows the compiler to further optimize the later check. With those changes, the warning also disappears. Fixes: 3805a938a6c2 ("flow_dissector: Check skb for VLAN only if skb specified.") Fixes: d5709f7ab776 ("flow_dissector: For stripped vlan, get vlan info from skb->vlan_tci") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Jiri Pirko <jiri@mellanox.com> Acked-by: Eric Garver <e@erig.me> Signed-off-by: David S. Miller <davem@davemloft.net>
| * | | net: ipv6: Do not consider link state for nexthop validationDavid Ahern2016-10-271-2/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Similar to IPv4, do not consider link state when validating next hops. Currently, if the link is down default routes can fail to insert: $ ip -6 ro add vrf blue default via 2100:2::64 dev eth2 RTNETLINK answers: No route to host With this patch the command succeeds. Fixes: 8c14586fc320 ("net: ipv6: Use passed in table for nexthop lookups") Signed-off-by: David Ahern <dsa@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| * | | net: ipv6: Fix processing of RAs in presence of VRFDavid Ahern2016-10-271-20/+48
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | rt6_add_route_info and rt6_add_dflt_router were updated to pull the FIB table from the device index, but the corresponding rt6_get_route_info and rt6_get_dflt_router functions were not leading to the failure to process RA's: ICMPv6: RA: ndisc_router_discovery failed to add default route Fix the 'get' functions by using the table id associated with the device when applicable. Also, now that default routes can be added to tables other than the default table, rt6_purge_dflt_routers needs to be updated as well to look at all tables. To handle that efficiently, add a flag to the table denoting if it is has a default route via RA. Fixes: ca254490c8dfd ("net: Add VRF support to IPv6 stack") Signed-off-by: David Ahern <dsa@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| * | | udp: fix IP_CHECKSUM handlingEric Dumazet2016-10-263-7/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | First bug was added in commit ad6f939ab193 ("ip: Add offset parameter to ip_cmsg_recv") : Tom missed that ipv4 udp messages could be received on AF_INET6 socket. ip_cmsg_recv(msg, skb) should have been replaced by ip_cmsg_recv_offset(msg, skb, sizeof(struct udphdr)); Then commit e6afc8ace6dd ("udp: remove headers from UDP packets before queueing") forgot to adjust the offsets now UDP headers are pulled before skb are put in receive queue. Fixes: ad6f939ab193 ("ip: Add offset parameter to ip_cmsg_recv") Fixes: e6afc8ace6dd ("udp: remove headers from UDP packets before queueing") Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Sam Kumar <samanthakumar@google.com> Cc: Willem de Bruijn <willemb@google.com> Tested-by: Willem de Bruijn <willemb@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| * | | sctp: fix the panic caused by route updateXin Long2016-10-261-1/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit 7303a1475008 ("sctp: identify chunks that need to be fragmented at IP level") made the chunk be fragmented at IP level in the next round if it's size exceed PMTU. But there still is another case, PMTU can be updated if transport's dst expires and transport's pmtu_pending is set in sctp_packet_transmit. If the new PMTU is less than the chunk, the same issue with that commit can be triggered. So we should drop this packet and let it retransmit in another round where it would be fragmented at IP level. This patch is to fix it by checking the chunk size after PMTU may be updated and dropping this packet if it's size exceed PMTU. Fixes: 90017accff61 ("sctp: Add GSO support") Signed-off-by: Xin Long <lucien.xin@gmail.com> Acked-by: Neil Horman <nhorman@txudriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| * | | Merge branch 'for-upstream' of ↵David S. Miller2016-10-233-35/+42
| |\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth Johan Hedberg says: ==================== pull request: bluetooth 2016-10-21 Here are some more Bluetooth fixes for the 4.9 kernel: - Fix to btwilink driver probe function return value - Power management fix to hci_bcm - Fix to encoding name in scan response data Please let me know if there are any issues pulling. Thanks. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
| | * | | Bluetooth: Fix append max 11 bytes of name to scan rsp dataMichał Narajowski2016-10-193-35/+42
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Append maximum of 10 + 1 bytes of name to scan response data. Complete name is appended only if exists and is <= 10 characters. Else append short name if exists or shorten complete name if not. This makes sure name is consistent across multiple advertising instances. Signed-off-by: Michał Narajowski <michal.narajowski@codecoup.pl> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2024-07-02 16:28:29 +0200