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* ebtables: arpreply: Add the standard target sanity checkGao Feng2017-05-161-0/+3
| | | | | | | | | | | | | | | | | The info->target comes from userspace and it would be used directly. So we need to add the sanity check to make sure it is a valid standard target, although the ebtables tool has already checked it. Kernel needs to validate anything coming from userspace. If the target is set as an evil value, it would break the ebtables and cause a panic. Because the non-standard target is treated as one offset. Now add one helper function ebt_invalid_target, and we would replace the macro INVALID_TARGET later. Signed-off-by: Gao Feng <gfree.wind@vip.163.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* netfilter: xtables: zero padding in data_to_userWillem de Bruijn2017-05-151-3/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | When looking up an iptables rule, the iptables binary compares the aligned match and target data (XT_ALIGN). In some cases this can exceed the actual data size to include padding bytes. Before commit f77bc5b23fb1 ("iptables: use match, target and data copy_to_user helpers") the malloc()ed bytes were overwritten by the kernel with kzalloced contents, zeroing the padding and making the comparison succeed. After this patch, the kernel copies and clears only data, leaving the padding bytes undefined. Extend the clear operation from data size to aligned data size to include the padding bytes, if any. Padding bytes can be observed in both match and target, and the bug triggered, by issuing a rule with match icmp and target ACCEPT: iptables -t mangle -A INPUT -i lo -p icmp --icmp-type 1 -j ACCEPT iptables -t mangle -D INPUT -i lo -p icmp --icmp-type 1 -j ACCEPT Fixes: f77bc5b23fb1 ("iptables: use match, target and data copy_to_user helpers") Reported-by: Paul Moore <pmoore@redhat.com> Reported-by: Richard Guy Briggs <rgb@redhat.com> Signed-off-by: Willem de Bruijn <willemb@google.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nfDavid S. Miller2017-05-031-0/+20
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pablo Neira Ayuso says: ==================== Netfilter/IPVS/OVS fixes for net The following patchset contains a rather large batch of Netfilter, IPVS and OVS fixes for your net tree. This includes fixes for ctnetlink, the userspace conntrack helper infrastructure, conntrack OVS support, ebtables DNAT target, several leaks in error path among other. More specifically, they are: 1) Fix reference count leak in the CT target error path, from Gao Feng. 2) Remove conntrack entry clashing with a matching expectation, patch from Jarno Rajahalme. 3) Fix bogus EEXIST when registering two different userspace helpers, from Liping Zhang. 4) Don't leak dummy elements in the new bitmap set type in nf_tables, from Liping Zhang. 5) Get rid of module autoload from conntrack update path in ctnetlink, we don't need autoload at this late stage and it is happening with rcu read lock held which is not good. From Liping Zhang. 6) Fix deadlock due to double-acquire of the expect_lock from conntrack update path, this fixes a bug that was introduced when the central spinlock got removed. Again from Liping Zhang. 7) Safe ct->status update from ctnetlink path, from Liping. The expect_lock protection that was selected when the central spinlock was removed was not really protecting anything at all. 8) Protect sequence adjustment under ct->lock. 9) Missing socket match with IPv6, from Peter Tirsek. 10) Adjust skb->pkt_type of DNAT'ed frames from ebtables, from Linus Luessing. 11) Don't give up on evaluating the expression on new entries added via dynset expression in nf_tables, from Liping Zhang. 12) Use skb_checksum() when mangling icmpv6 in IPv6 NAT as this deals with non-linear skbuffs. 13) Don't allow IPv6 service in IPVS if no IPv6 support is available, from Paolo Abeni. 14) Missing mutex release in error path of xt_find_table_lock(), from Dan Carpenter. 15) Update maintainers files, Netfilter section. Add Florian to the file, refer to nftables.org and change project status from Supported to Maintained. 16) Bail out on mismatching extensions in element updates in nf_tables. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
| * bridge: ebtables: fix reception of frames DNAT-ed to bridge device/portLinus Lüssing2017-04-251-0/+20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When trying to redirect bridged frames to the bridge device itself or a bridge port (brouting) via the dnat target then this currently fails: The ethernet destination of the frame is dnat'ed to the MAC address of the bridge device or port just fine. However, the IP code drops it in the beginning of ip_input.c/ip_rcv() as the dnat target left the skb->pkt_type as PACKET_OTHERHOST. Fixing this by resetting skb->pkt_type to an appropriate type after dnat'ing. Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* | ebtables: remove nf_hook_register usageFlorian Westphal2017-04-264-49/+46Star
| | | | | | | | | | | | | | | | | | Similar to ip_register_table, pass nf_hook_ops to ebt_register_table(). This allows to handle hook registration also via pernet_ops and allows us to avoid use of legacy register_hook api. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* | netfilter: Remove exceptional & on function nameArushi Singhal2017-04-071-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Remove & from function pointers to conform to the style found elsewhere in the file. Done using the following semantic patch // <smpl> @r@ identifier f; @@ f(...) { ... } @@ identifier r.f; @@ - &f + f // </smpl> Signed-off-by: Arushi Singhal <arushisinghal19971997@gmail.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* | netfilter: Remove unnecessary cast on void pointersimran singhal2017-04-071-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The following Coccinelle script was used to detect this: @r@ expression x; void* e; type T; identifier f; @@ ( *((T *)e) | ((T *)x)[...] | ((T*)x)->f | - (T*) e ) Unnecessary parantheses are also remove. Signed-off-by: simran singhal <singhalsimran0@gmail.com> Reviewed-by: Stephen Hemminger <stephen@networkplumber.org> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* | netfilter: nf_tables: validate the expr explicitly after init successfullyLiping Zhang2017-03-061-5/+1Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When we want to validate the expr's dependency or hooks, we must do two things to accomplish it. First, write a X_validate callback function and point ->validate to it. Second, call X_validate in init routine. This is very common, such as fib, nat, reject expr and so on ... It is a little ugly, since we will call X_validate in the expr's init routine, it's better to do it in nf_tables_newexpr. So we can avoid to do this again and again. After doing this, the second step listed above is not useful anymore, remove them now. Patch was tested by nftables/tests/py/nft-test.py and nftables/tests/shell/run-tests.sh. Signed-off-by: Liping Zhang <zlpnobody@gmail.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* | netfilter: Use pr_cont where appropriateJoe Perches2017-03-061-17/+17
|/ | | | | | | | | | | | | | Logging output was changed when simple printks without KERN_CONT are now emitted on a new line and KERN_CONT is required to continue lines so use pr_cont. Miscellanea: o realign arguments o use print_hex_dump instead of a local variant Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* lib/vsprintf.c: remove %Z supportAlexey Dobriyan2017-02-281-1/+1
| | | | | | | | | | | | | | | | | | Now that %z is standartised in C99 there is no reason to support %Z. Unlike %L it doesn't even make format strings smaller. Use BUILD_BUG_ON in a couple ATM drivers. In case anyone didn't notice lib/vsprintf.o is about half of SLUB which is in my opinion is quite an achievement. Hopefully this patch inspires someone else to trim vsprintf.c more. Link: http://lkml.kernel.org/r/20170103230126.GA30170@avx2 Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Cc: Andy Shevchenko <andy.shevchenko@gmail.com> Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* netfilter: allow logging from non-init namespacesMichal Kubeček2017-02-021-1/+1
| | | | | | | | | | | | | | | | | | | | Commit 69b34fb996b2 ("netfilter: xt_LOG: add net namespace support for xt_LOG") disabled logging packets using the LOG target from non-init namespaces. The motivation was to prevent containers from flooding kernel log of the host. The plan was to keep it that way until syslog namespace implementation allows containers to log in a safe way. However, the work on syslog namespace seems to have hit a dead end somewhere in 2013 and there are users who want to use xt_LOG in all network namespaces. This patch allows to do so by setting /proc/sys/net/netfilter/nf_log_all_netns to a nonzero value. This sysctl is only accessible from init_net so that one cannot switch the behaviour from inside a container. Signed-off-by: Michal Kubecek <mkubecek@suse.cz> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* xtables: extend matches and targets with .usersizeWillem de Bruijn2017-01-091-0/+1
| | | | | | | | | | | | | In matches and targets that define a kernel-only tail to their xt_match and xt_target data structs, add a field .usersize that specifies up to where data is to be shared with userspace. Performed a search for comment "Used internally by the kernel" to find relevant matches and targets. Manually inspected the structs to derive a valid offsetof. Signed-off-by: Willem de Bruijn <willemb@google.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* ebtables: use match, target and data copy_to_user helpersWillem de Bruijn2017-01-091-31/+47
| | | | | | | | | | | | | | Convert ebtables to copying entries, matches and targets one by one. The solution is analogous to that of generic xt_(match|target)_to_user helpers, but is applied to different structs. Convert existing helpers ebt_make_XXXname helpers that overwrite fields of an already copy_to_user'd struct with ebt_XXX_to_user helpers that copy all relevant fields of the struct from scratch. Signed-off-by: Willem de Bruijn <willemb@google.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* Replace <asm/uaccess.h> with <linux/uaccess.h> globallyLinus Torvalds2016-12-241-1/+1
| | | | | | | | | | | | | This was entirely automated, using the script by Al: PATT='^[[:blank:]]*#[[:blank:]]*include[[:blank:]]*<asm/uaccess.h>' sed -i -e "s!$PATT!#include <linux/uaccess.h>!" \ $(git grep -l "$PATT"|grep -v ^include/linux/uaccess.h) to do the replacement at the end of the merge window. Requested-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* netfilter: nf_log: do not assume ethernet header in netdev familyLiping Zhang2016-12-041-1/+2
| | | | | | | | | | | | | | In netdev family, we will handle non ethernet packets, so using eth_hdr(skb)->h_proto is incorrect. Meanwhile, we can use socket(AF_PACKET...) to sending packets, so skb->protocol is not always set in bridge family. Add an extra parameter into nf_log_l2packet to solve this issue. Fixes: 1fddf4bad0ac ("netfilter: nf_log: add packet logging for netdev family") Signed-off-by: Liping Zhang <zlpnobody@gmail.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* netfilter: remove hook_entries field from nf_hook_statePablo Neira Ayuso2016-11-031-1/+1
| | | | | | | | | | | This field is only useful for nf_queue, so store it in the nf_queue_entry structure instead, away from the core path. Pass hook_head to nf_hook_slow(). Since we always have a valid entry on the first iteration in nf_iterate(), we can use 'do { ... } while (entry)' loop instead. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* netfilter: nf_tables: use hook state from xt_action_param structurePablo Neira Ayuso2016-11-032-13/+19
| | | | | | | | | | Don't copy relevant fields from hook state structure, instead use the one that is already available in struct xt_action_param. This patch also adds a set of new wrapper functions to fetch relevant hook state structure fields. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* netfilter: x_tables: move hook state into xt_action_param structurePablo Neira Ayuso2016-11-035-17/+15Star
| | | | | | | | | | | Place pointer to hook state in xt_action_param structure instead of copying the fields that we need. After this change xt_action_param fits into one cacheline. This patch also adds a set of new wrapper functions to fetch relevant hook state structure fields. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* netfilter: kill NF_HOOK_THRESH() and state->treshPablo Neira Ayuso2016-11-031-1/+1
| | | | | | | | | | | | | | | | Patch c5136b15ea36 ("netfilter: bridge: add and use br_nf_hook_thresh") introduced br_nf_hook_thresh(). Replace NF_HOOK_THRESH() by br_nf_hook_thresh from br_nf_forward_finish(), so we have no more callers for this macro. As a result, state->thresh and explicit thresh parameter in the hook state structure is not required anymore. And we can get rid of skip-hook-under-thresh loop in nf_iterate() in the core path that is only used by br_netfilter to search for the filter hook. Suggested-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* netfilter: nf_log: add packet logging for netdev familyPablo Neira Ayuso2016-11-012-15/+2Star
| | | | | | | | | | | Move layer 2 packet logging into nf_log_l2packet() that resides in nf_log_common.c, so this can be shared by both bridge and netdev families. This patch adds the boiler plate code to register the netdev logging family. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* Merge branch 'master' of ↵Pablo Neira Ayuso2016-09-252-0/+3
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next Conflicts: net/netfilter/core.c net/netfilter/nf_tables_netdev.c Resolve two conflicts before pull request for David's net-next tree: 1) Between c73c24849011 ("netfilter: nf_tables_netdev: remove redundant ip_hdr assignment") from the net tree and commit ddc8b6027ad0 ("netfilter: introduce nft_set_pktinfo_{ipv4, ipv6}_validate()"). 2) Between e8bffe0cf964 ("net: Add _nf_(un)register_hooks symbols") and Aaron Conole's patches to replace list_head with single linked list. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
| * Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller2016-09-132-0/+3
| |\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Conflicts: drivers/net/ethernet/mediatek/mtk_eth_soc.c drivers/net/ethernet/qlogic/qed/qed_dcbx.c drivers/net/phy/Kconfig All conflicts were cases of overlapping commits. Signed-off-by: David S. Miller <davem@davemloft.net>
| | * netfilter: ebtables: put module reference when an incorrect extension is foundSabrina Dubroca2016-08-251-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | commit bcf493428840 ("netfilter: ebtables: Fix extension lookup with identical name") added a second lookup in case the extension that was found during the first lookup matched another extension with the same name, but didn't release the reference on the incorrect module. Fixes: bcf493428840 ("netfilter: ebtables: Fix extension lookup with identical name") Signed-off-by: Sabrina Dubroca <sd@queasysnail.net> Acked-by: Phil Sutter <phil@nwl.cc> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
| | * netfilter: nft_meta: improve the validity check of pkttype set exprLiping Zhang2016-08-251-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | "meta pkttype set" is only supported on prerouting chain with bridge family and ingress chain with netdev family. But the validate check is incomplete, and the user can add the nft rules on input chain with bridge family, for example: # nft add table bridge filter # nft add chain bridge filter input {type filter hook input \ priority 0 \;} # nft add chain bridge filter test # nft add rule bridge filter test meta pkttype set unicast # nft add rule bridge filter input jump test This patch fixes the problem. Signed-off-by: Liping Zhang <liping.zhang@spreadtrum.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* | | netfilter: nft_log: complete NFTA_LOG_FLAGS attr supportLiping Zhang2016-09-251-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | NFTA_LOG_FLAGS attribute is already supported, but the related NF_LOG_XXX flags are not exposed to the userspace. So we cannot explicitly enable log flags to log uid, tcp sequence, ip options and so on, i.e. such rule "nft add rule filter output log uid" is not supported yet. So move NF_LOG_XXX macro definitions to the uapi/../nf_log.h. In order to keep consistent with other modules, change NF_LOG_MASK to refer to all supported log flags. On the other hand, add a new NF_LOG_DEFAULT_MASK to refer to the original default log flags. Finally, if user specify the unsupported log flags or NFTA_LOG_GROUP and NFTA_LOG_FLAGS are set at the same time, report EINVAL to the userspace. Signed-off-by: Liping Zhang <liping.zhang@spreadtrum.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* | | netfilter: Remove explicit rcu_read_lock in nf_hook_slowAaron Conole2016-09-242-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | All of the callers of nf_hook_slow already hold the rcu_read_lock, so this cleanup removes the recursive call. This is just a cleanup, as the locking code gracefully handles this situation. Signed-off-by: Aaron Conole <aconole@bytheb.org> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* | | netfilter: Add the missed return value check of nft_register_chain_typeGao Feng2016-09-121-5/+13
| | | | | | | | | | | | | | | | | | | | | | | | There are some codes of netfilter module which did not check the return value of nft_register_chain_type. Add the checks now. Signed-off-by: Gao Feng <fgao@ikuai8.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* | | netfilter: nf_tables_bridge: use nft_set_pktinfo_ipv{4, 6}_validatePablo Neira Ayuso2016-09-122-71/+45Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Consolidate pktinfo setup and validation by using the new generic functions so we converge to the netdev family codebase. We only need a linear IPv4 and IPv6 header from the reject expression, so move nft_bridge_iphdr_validate() and nft_bridge_ip6hdr_validate() to net/bridge/netfilter/nft_reject_bridge.c. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* | | netfilter: nf_tables: ensure proper initialization of nft_pktinfo fieldsPablo Neira Ayuso2016-09-121-3/+3
|/ / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch introduces nft_set_pktinfo_unspec() that ensures proper initialization all of pktinfo fields for non-IP traffic. This is used by the bridge, netdev and arp families. This new function relies on nft_set_pktinfo_proto_unspec() to set a new tprot_set field that indicates if transport protocol information is available. Remain fields are zeroed. The meta expression has been also updated to check to tprot_set in first place given that zero is a valid tprot value. Even a handcrafted packet may come with the IPPROTO_RAW (255) protocol number so we can't rely on this value as tprot unset. Reported-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* / netfilter: log: Check param to avoid overflow in nf_log_setGao Feng2016-08-301-2/+1Star
|/ | | | | | | | | The nf_log_set is an interface function, so it should do the strict sanity check of parameters. Convert the return value of nf_log_set as int instead of void. When the pf is invalid, return -EOPNOTSUPP. Signed-off-by: Gao Feng <fgao@ikuai8.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* net: bridge: remove _deliver functions and consolidate forward codeNikolay Aleksandrov2016-07-171-4/+4
| | | | | | | | | | | | | | | Before this patch we had two flavors of most forwarding functions - _forward and _deliver, the difference being that the latter are used when the packets are locally originated. Instead of all this function pointer passing and code duplication, we can just pass a boolean noting that the packet was locally originated and use that to perform the necessary checks in __br_forward. This gives a minor performance improvement but more importantly consolidates the forwarding paths. Also add a kernel doc comment to explain the exported br_forward()'s arguments. Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* netfilter: Convert FWINV<[foo]> macros and uses to NF_INVFJoe Perches2016-07-036-91/+101
| | | | | | | | | | | | | | | | | | | | | | | netfilter uses multiple FWINV #defines with identical form that hide a specific structure variable and dereference it with a invflags member. $ git grep "#define FWINV" include/linux/netfilter_bridge/ebtables.h:#define FWINV(bool,invflg) ((bool) ^ !!(info->invflags & invflg)) net/bridge/netfilter/ebtables.c:#define FWINV2(bool, invflg) ((bool) ^ !!(e->invflags & invflg)) net/ipv4/netfilter/arp_tables.c:#define FWINV(bool, invflg) ((bool) ^ !!(arpinfo->invflags & (invflg))) net/ipv4/netfilter/ip_tables.c:#define FWINV(bool, invflg) ((bool) ^ !!(ipinfo->invflags & (invflg))) net/ipv6/netfilter/ip6_tables.c:#define FWINV(bool, invflg) ((bool) ^ !!(ip6info->invflags & (invflg))) net/netfilter/xt_tcpudp.c:#define FWINVTCP(bool, invflg) ((bool) ^ !!(tcpinfo->invflags & (invflg))) Consolidate these macros into a single NF_INVF macro. Miscellanea: o Neaten the alignment around these uses o A few lines are > 80 columns for intelligibility Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* etherdevice.h & bridge: netfilter: Add and use ether_addr_equal_maskedJoe Perches2016-07-013-49/+34Star
| | | | | | | | | | | | | There are code duplications of a masked ethernet address comparison here so make it a separate function instead. Miscellanea: o Neaten alignment of FWINV macro uses to make it clearer for the reader Signed-off-by: Joe Perches <joe@perches.com> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* bridge: netfilter: checkpatch data type fixesTobin C Harding2016-06-071-20/+20
| | | | | | | | | | checkpatch produces data type 'checks'. This patch amends them by changing, for example: uint8_t -> u8 Signed-off-by: Tobin C Harding <me@tobin.cc> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller2016-04-241-1/+5
|\ | | | | | | | | | | | | | | | | | | | | Conflicts were two cases of simple overlapping changes, nothing serious. In the UDP case, we need to add a hlist_add_tail_rcu() to linux/rculist.h, because we've moved UDP socket handling away from using nulls lists. Signed-off-by: David S. Miller <davem@davemloft.net>
| * netfilter: ebtables: Fix extension lookup with identical namePhil Sutter2016-04-131-1/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If a requested extension exists as module and is not loaded, ebt_check_match() might accidentally use an NFPROTO_UNSPEC one with same name and fail. Reproduced with limit match: Given xt_limit and ebt_limit both built as module, the following would fail: modprobe xt_limit ebtables -I INPUT --limit 1/s -j ACCEPT The fix is to make ebt_check_match() distrust a found NFPROTO_UNSPEC extension and retry after requesting an appropriate module. Cc: Florian Westphal <fw@strlen.de> Signed-off-by: Phil Sutter <phil@nwl.cc> Acked-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* | Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-nextDavid S. Miller2016-04-131-2/+45
|\ \ | |/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pablo Neira Ayuso says: ==================== Netfilter updates for net-next The following patchset contains the first batch of Netfilter updates for your net-next tree. 1) Define pr_fmt() in nf_conntrack, from Weongyo Jeong. 2) Define and register netfilter's afinfo for the bridge family, this comes in preparation for native nfqueue's bridge for nft, from Stephane Bryant. 3) Add new attributes to store layer 2 and VLAN headers to nfqueue, also from Stephane Bryant. 4) Parse new NFQA_VLAN and NFQA_L2HDR nfqueue netlink attributes coming from userspace, from Stephane Bryant. 5) Use net->ipv6.devconf_all->hop_limit instead of hardcoded hop_limit in IPv6 SYNPROXY, from Liping Zhang. 6) Remove unnecessary check for dst == NULL in nf_reject_ipv6, from Haishuang Yan. 7) Deinline ctnetlink event report functions, from Florian Westphal. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
| * netfilter: bridge: add nf_afinfo to enable queuing to userspaceStephane Bryant2016-03-291-2/+45
| | | | | | | | | | | | | | | | | | This just adds and registers a nf_afinfo for the ethernet bridge, which enables queuing to userspace for the AF_BRIDGE family. No checksum computation is done. Signed-off-by: Stephane Bryant <stephane.ml.bryant@gmail.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* | netfilter: ipv4: fix NULL dereferenceLiping Zhang2016-03-281-10/+10
| | | | | | | | | | | | | | | | | | | | Commit fa50d974d104 ("ipv4: Namespaceify ip_default_ttl sysctl knob") use sock_net(skb->sk) to get the net namespace, but we can't assume that sk_buff->sk is always exist, so when it is NULL, oops will happen. Signed-off-by: Liping Zhang <liping.zhang@spreadtrum.com> Reviewed-by: Nikolay Borisov <kernel@kyup.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* | netfilter: x_tables: enforce nul-terminated table name from getsockopt ↵Pablo Neira Ayuso2016-03-281-0/+4
|/ | | | | | | | | | | GET_ENTRIES Make sure the table names via getsockopt GET_ENTRIES is nul-terminated in ebtables and all the x_tables variants and their respective compat code. Uncovered by KASAN. Reported-by: Baozeng Ding <sploving1@gmail.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* ipv4: Namespaceify ip_default_ttl sysctl knobNikolay Borisov2016-02-171-3/+5
| | | | | Signed-off-by: Nikolay Borisov <kernel@kyup.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* netfilter: nf_tables: release objects on netns destructionPablo Neira Ayuso2015-12-281-1/+1
| | | | | | | | | | | | | We have to release the existing objects on netns removal otherwise we leak them. Chains are unregistered in first place to make sure no packets are walking on our rules and sets anymore. The object release happens by when we unregister the family via nft_release_afinfo() which is called from nft_unregister_afinfo() from the corresponding __net_exit path in every family. Reported-by: Patrick McHardy <kaber@trash.net> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* netfilter: nf_tables: wrap tracing with a static keyFlorian Westphal2015-12-091-0/+1
| | | | | | | | | | | | | | | | | | | | | | | Only needed when meta nftrace rule(s) were added. The assumption is that no such rules are active, so the call to nft_trace_init is "never" needed. When nftrace rules are active, we always call the nft_trace_* functions, but will only send netlink messages when all of the following are true: - traceinfo structure was initialised - skb->nf_trace == 1 - at least one subscriber to trace group. Adding an extra conditional (static_branch ... && skb->nf_trace) nft_trace_init( ..) Is possible but results in a larger nft_do_chain footprint. Signed-off-by: Florian Westphal <fw@strlen.de> Acked-by: Patrick McHardy <kaber@trash.net> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* netfilter-bridge: layout of if statementsIan Morris2015-11-232-6/+6
| | | | | | | | | Eliminate some checkpatch issues by improved layout of if statements. No changes detected by objdiff. Signed-off-by: Ian Morris <ipm@chirality.org.uk> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* netfilter-bridge: brace placementIan Morris2015-11-232-6/+3Star
| | | | | | | | | Change brace placement to eliminate checkpatch error. No changes detected by objdiff. Signed-off-by: Ian Morris <ipm@chirality.org.uk> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* netfilter-bridge: use netdev style commentsIan Morris2015-11-233-46/+56
| | | | | | | | | Changes comments to use netdev style. No changes detected by objdiff. Signed-off-by: Ian Morris <ipm@chirality.org.uk> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* netfilter-bridge: Cleanse indentationIan Morris2015-11-234-25/+25
| | | | | | | | | | Fixes a bunch of issues detected by checkpatch with regards to code indentation. No changes detected by objdiff. Signed-off-by: Ian Morris <ipm@chirality.org.uk> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* netfilter: remove hook owner refcountingFlorian Westphal2015-10-162-6/+0Star
| | | | | | | | | | | since commit 8405a8fff3f8 ("netfilter: nf_qeueue: Drop queue entries on nf_unregister_hook") all pending queued entries are discarded. So we can simply remove all of the owner handling -- when module is removed it also needs to unregister all its hooks. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* netfilter: Pass priv instead of nf_hook_ops to netfilter hooksEric W. Biederman2015-09-183-6/+6
| | | | | | | | | Only pass the void *priv parameter out of the nf_hook_ops. That is all any of the functions are interested now, and by limiting what is passed it becomes simpler to change implementation details. Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* netfilter: nf_tables: Use pkt->net instead of computing net from the passed ↵Eric W. Biederman2015-09-181-7/+6Star
| | | | | | | net_devices Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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