netdev - BUG: corrupted list in neigh_parms

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Message-ID: <CALAgD-7NTOZ-8-uLbRSa35B+wKkXzzmviE1hy6ajLxwU2kfj7Q@mail.gmail.com>
Date: Wed, 28 Aug 2024 16:36:00 -0700
From: Xingyu Li <xli399@....edu>
To: davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org, 
	pabeni@...hat.com, dsahern@...nel.org, j.granados@...sung.com, 
	linux@...ssschuh.net, judyhsiao@...omium.org, James.Z.Li@...l.com, 
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: Yu Hao <yhao016@....edu>
Subject: BUG: corrupted list in neigh_parms_release

Hi,

We found a bug in Linux 6.10 using syzkaller. It is possibly a
corrupted list  bug.
The bug report is as follows, but unfortunately there is no generated
syzkaller reproducer.

Bug report:

list_del corruption. next->prev should be ffff88801b3bdc18, but was
0000000000000000. (next=ffff88803c7c5018)
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:67!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI
CPU: 0 PID: 47298 Comm: kworker/u4:24 Not tainted 6.10.0 #13
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014
Workqueue: netns cleanup_net
RIP: 0010:__list_del_entry_valid_or_report+0x11e/0x120 lib/list_debug.c:65
Code: 96 06 0f 0b 48 c7 c7 e0 5b a9 8b 4c 89 fe 48 89 d9 e8 96 ff 96
06 0f 0b 48 c7 c7 60 5c a9 8b 4c 89 fe 4c 89 f1 e8 82 ff 96 06 <0f> 0b
80 3d bd 35 c6 0a 00 74 01 c3 31 d2 eb 02 66 90 55 41 57 41
RSP: 0018:ffffc90002aff6b8 EFLAGS: 00010246
RAX: 000000000000006d RBX: ffff88803c7c5020 RCX: 1547a0d62a403a00
RDX: 0000000000000000 RSI: 0000000080000201 RDI: 0000000000000000
RBP: ffffffff8ee71680 R08: ffffffff8172e30c R09: 1ffff9200055fe78
R10: dffffc0000000000 R11: fffff5200055fe79 R12: dffffc0000000000
R13: dffffc0000000000 R14: ffff88803c7c5018 R15: ffff88801b3bdc18
FS:  0000000000000000(0000) GS:ffff888063a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6cc5e4f360 CR3: 00000000413bc000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __list_del_entry_valid include/linux/list.h:124 [inline]
 __list_del_entry include/linux/list.h:215 [inline]
 list_del include/linux/list.h:229 [inline]
 neigh_parms_release+0x51/0x230 net/core/neighbour.c:1759
 addrconf_ifdown+0x188c/0x1b50 net/ipv6/addrconf.c:4009
 addrconf_notify+0x3c4/0x1000
 notifier_call_chain kernel/notifier.c:93 [inline]
 raw_notifier_call_chain+0xe0/0x180 kernel/notifier.c:461
 call_netdevice_notifiers_extack net/core/dev.c:2030 [inline]
 call_netdevice_notifiers net/core/dev.c:2044 [inline]
 unregister_netdevice_many_notify+0xd65/0x16d0 net/core/dev.c:11219
 cleanup_net+0x764/0xcd0 net/core/net_namespace.c:635
 process_one_work kernel/workqueue.c:3248 [inline]
 process_scheduled_works+0x977/0x1410 kernel/workqueue.c:3329
 worker_thread+0xaa0/0x1020 kernel/workqueue.c:3409
 kthread+0x2eb/0x380 kernel/kthread.c:389
 ret_from_fork+0x49/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:244
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__list_del_entry_valid_or_report+0x11e/0x120 lib/list_debug.c:65
Code: 96 06 0f 0b 48 c7 c7 e0 5b a9 8b 4c 89 fe 48 89 d9 e8 96 ff 96
06 0f 0b 48 c7 c7 60 5c a9 8b 4c 89 fe 4c 89 f1 e8 82 ff 96 06 <0f> 0b
80 3d bd 35 c6 0a 00 74 01 c3 31 d2 eb 02 66 90 55 41 57 41
RSP: 0018:ffffc90002aff6b8 EFLAGS: 00010246
RAX: 000000000000006d RBX: ffff88803c7c5020 RCX: 1547a0d62a403a00
RDX: 0000000000000000 RSI: 0000000080000201 RDI: 0000000000000000
RBP: ffffffff8ee71680 R08: ffffffff8172e30c R09: 1ffff9200055fe78
R10: dffffc0000000000 R11: fffff5200055fe79 R12: dffffc0000000000
R13: dffffc0000000000 R14: ffff88803c7c5018 R15: ffff88801b3bdc18
FS:  0000000000000000(0000) GS:ffff888063a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6cc5e4f360 CR3: 00000000413bc000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400


-- 
Yours sincerely,
Xingyu