Re: [syzbot] [netfilter?] KASAN: slab-use-after-free Read in nf_tables_trans_destroy_work

[syzbot <syzbot+4fd66a69358fc15ae2ad@syzkaller.appspotmail.com>]

Hello,

syzbot has tested the proposed patch but the reproducer is still triggering an issue:
WARNING in nft_rcv_nl_event

------------[ cut here ]------------
WARNING: CPU: 0 PID: 6134 at net/netfilter/nf_tables_api.c:11557 nft_rcv_nl_event+0x1e2/0x730 net/netfilter/nf_tables_api.c:11557
Modules linked in:
CPU: 0 PID: 6134 Comm: syz.2.44 Not tainted 6.10.0-rc5-syzkaller-01137-g1c5fc27bc48a-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:nft_rcv_nl_event+0x1e2/0x730 net/netfilter/nf_tables_api.c:11557
Code: 6c 24 40 4c 89 7c 24 60 48 8b 44 24 78 42 80 3c 20 00 74 08 4c 89 ff e8 9c dc 46 f8 49 8b 07 4c 39 f8 74 0b e8 6f 0e e1 f7 90 <0f> 0b 90 eb 1c 48 8b 05 a2 34 b2 05 48 c7 c1 40 4d 67 8f 48 39 c8
RSP: 0018:ffffc90003eb79e0 EFLAGS: 00010293
RAX: ffffffff89b51c9f RBX: ffff88807abfac00 RCX: ffff888029719e00
RDX: 0000000000000000 RSI: ffffffff8bcabb40 RDI: ffffffff8c1fee00
RBP: ffffc90003eb7b28 R08: ffffffff92fbc657 R09: 1ffffffff25f78ca
R10: dffffc0000000000 R11: fffffbfff25f78cb R12: dffffc0000000000
R13: ffff888023bbd700 R14: ffff88807abfac00 R15: ffff88807abfac10
FS:  00005555803a6500(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000200 CR3: 000000007a250000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 notifier_call_chain+0x19f/0x3e0 kernel/notifier.c:93
 blocking_notifier_call_chain+0x69/0x90 kernel/notifier.c:388
 netlink_release+0x11a6/0x1b10 net/netlink/af_netlink.c:787
 __sock_release net/socket.c:659 [inline]
 sock_close+0xbc/0x240 net/socket.c:1421
 __fput+0x406/0x8b0 fs/file_table.c:422
 task_work_run+0x24f/0x310 kernel/task_work.c:180
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x168/0x370 kernel/entry/common.c:218
 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f48f9d75b99
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffecf0981a8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 000000000001d197 RCX: 00007f48f9d75b99
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: ffffffffffffffff R08: 0000000000000001 R09: 00000004cf0984bf
R10: 00007f48f9c00000 R11: 0000000000000246 R12: 00007f48f9f03fac
R13: 0000000000000032 R14: 00007f48f9f05aa0 R15: 00007f48f9f03fa0
 </TASK>


Tested on:

commit:         1c5fc27b Merge tag 'nf-next-24-06-28' of git://git.ker..
git tree:       https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next.git
console output: https://syzkaller.appspot.com/x/log.txt?x=16077369980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=5264b58fdff6e881
dashboard link: https://syzkaller.appspot.com/bug?extid=4fd66a69358fc15ae2ad
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
patch:          https://syzkaller.appspot.com/x/patch.diff?x=112dca6e980000