From: syzbot <syzbot+a2ff6fa45162a5ed4dd3@syzkaller.appspotmail.com>
To: coreteam@netfilter.org, davem@davemloft.net, fw@strlen.de,
kadlec@netfilter.org, kuba@kernel.org,
linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
netfilter-devel@vger.kernel.org, pablo@netfilter.org,
syzkaller-bugs@googlegroups.com
Subject: memory leak in nf_tables_parse_netdev_hooks (2)
Date: Mon, 02 Mar 2020 10:13:12 -0800 [thread overview]
Message-ID: <000000000000ebdc39059fe32327@google.com> (raw)
Hello,
syzbot found the following crash on:
HEAD commit: 63623fd4 Merge tag 'for-linus' of git://git.kernel.org/pub..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=10060a2de00000
kernel config: https://syzkaller.appspot.com/x/.config?x=6951e37c8d613538
dashboard link: https://syzkaller.appspot.com/bug?extid=a2ff6fa45162a5ed4dd3
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15acfa81e00000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=172f9d09e00000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+a2ff6fa45162a5ed4dd3@syzkaller.appspotmail.com
executing program
BUG: memory leak
unreferenced object 0xffff88810b2b2080 (size 96):
comm "syz-executor089", pid 7270, jiffies 4294941532 (age 13.520s)
hex dump (first 32 bytes):
00 21 2b 0b 81 88 ff ff 40 06 37 1a 81 88 ff ff .!+.....@.7.....
20 47 c7 82 ff ff ff ff 00 60 2e 2a 81 88 ff ff G.......`.*....
backtrace:
[<00000000f3a29219>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline]
[<00000000f3a29219>] slab_post_alloc_hook mm/slab.h:586 [inline]
[<00000000f3a29219>] slab_alloc mm/slab.c:3320 [inline]
[<00000000f3a29219>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3549
[<000000005471dca6>] kmalloc include/linux/slab.h:555 [inline]
[<000000005471dca6>] nft_netdev_hook_alloc+0x3f/0xd0 net/netfilter/nf_tables_api.c:1653
[<00000000547b3e6d>] nf_tables_parse_netdev_hooks+0xaa/0x220 net/netfilter/nf_tables_api.c:1702
[<000000005c4bc909>] nf_tables_flowtable_parse_hook net/netfilter/nf_tables_api.c:6097 [inline]
[<000000005c4bc909>] nf_tables_newflowtable+0x407/0x930 net/netfilter/nf_tables_api.c:6297
[<000000004e57b3ed>] nfnetlink_rcv_batch+0x353/0x8c0 net/netfilter/nfnetlink.c:433
[<0000000095bbce6c>] nfnetlink_rcv_skb_batch net/netfilter/nfnetlink.c:543 [inline]
[<0000000095bbce6c>] nfnetlink_rcv+0x189/0x1c0 net/netfilter/nfnetlink.c:561
[<000000002a197f31>] netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline]
[<000000002a197f31>] netlink_unicast+0x223/0x310 net/netlink/af_netlink.c:1329
[<000000002fe97501>] netlink_sendmsg+0x2c0/0x570 net/netlink/af_netlink.c:1918
[<0000000072a2eef7>] sock_sendmsg_nosec net/socket.c:652 [inline]
[<0000000072a2eef7>] sock_sendmsg+0x54/0x70 net/socket.c:672
[<0000000049691ba6>] ____sys_sendmsg+0x2d0/0x300 net/socket.c:2343
[<00000000466e69b2>] ___sys_sendmsg+0x8a/0xd0 net/socket.c:2397
[<0000000086270dd0>] __sys_sendmsg+0x80/0xf0 net/socket.c:2430
[<000000001b2586e4>] __do_sys_sendmsg net/socket.c:2439 [inline]
[<000000001b2586e4>] __se_sys_sendmsg net/socket.c:2437 [inline]
[<000000001b2586e4>] __x64_sys_sendmsg+0x23/0x30 net/socket.c:2437
[<0000000005b8b511>] do_syscall_64+0x73/0x220 arch/x86/entry/common.c:294
[<000000005e09659b>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
BUG: memory leak
unreferenced object 0xffff88810b2b2100 (size 96):
comm "syz-executor089", pid 7270, jiffies 4294941532 (age 13.520s)
hex dump (first 32 bytes):
40 06 37 1a 81 88 ff ff 80 20 2b 0b 81 88 ff ff @.7...... +.....
20 47 c7 82 ff ff ff ff 00 e0 1d 25 81 88 ff ff G.........%....
backtrace:
[<00000000f3a29219>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline]
[<00000000f3a29219>] slab_post_alloc_hook mm/slab.h:586 [inline]
[<00000000f3a29219>] slab_alloc mm/slab.c:3320 [inline]
[<00000000f3a29219>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3549
[<000000005471dca6>] kmalloc include/linux/slab.h:555 [inline]
[<000000005471dca6>] nft_netdev_hook_alloc+0x3f/0xd0 net/netfilter/nf_tables_api.c:1653
[<00000000547b3e6d>] nf_tables_parse_netdev_hooks+0xaa/0x220 net/netfilter/nf_tables_api.c:1702
[<000000005c4bc909>] nf_tables_flowtable_parse_hook net/netfilter/nf_tables_api.c:6097 [inline]
[<000000005c4bc909>] nf_tables_newflowtable+0x407/0x930 net/netfilter/nf_tables_api.c:6297
[<000000004e57b3ed>] nfnetlink_rcv_batch+0x353/0x8c0 net/netfilter/nfnetlink.c:433
[<0000000095bbce6c>] nfnetlink_rcv_skb_batch net/netfilter/nfnetlink.c:543 [inline]
[<0000000095bbce6c>] nfnetlink_rcv+0x189/0x1c0 net/netfilter/nfnetlink.c:561
[<000000002a197f31>] netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline]
[<000000002a197f31>] netlink_unicast+0x223/0x310 net/netlink/af_netlink.c:1329
[<000000002fe97501>] netlink_sendmsg+0x2c0/0x570 net/netlink/af_netlink.c:1918
[<0000000072a2eef7>] sock_sendmsg_nosec net/socket.c:652 [inline]
[<0000000072a2eef7>] sock_sendmsg+0x54/0x70 net/socket.c:672
[<0000000049691ba6>] ____sys_sendmsg+0x2d0/0x300 net/socket.c:2343
[<00000000466e69b2>] ___sys_sendmsg+0x8a/0xd0 net/socket.c:2397
[<0000000086270dd0>] __sys_sendmsg+0x80/0xf0 net/socket.c:2430
[<000000001b2586e4>] __do_sys_sendmsg net/socket.c:2439 [inline]
[<000000001b2586e4>] __se_sys_sendmsg net/socket.c:2437 [inline]
[<000000001b2586e4>] __x64_sys_sendmsg+0x23/0x30 net/socket.c:2437
[<0000000005b8b511>] do_syscall_64+0x73/0x220 arch/x86/entry/common.c:294
[<000000005e09659b>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
---
This bug is generated by a bot. It may contain errors.
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reply other threads:[~2020-03-02 18:13 UTC|newest]
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