linux-kernel - BUG: corrupted list in rxrpc_discard

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Message-ID: <CALAgD-7DfifSgrCTLnp0Td0wCBFQ4DxHzfzXf_3oZ6OmQRQtcw@mail.gmail.com>
Date: Wed, 28 Aug 2024 16:37:30 -0700
From: Xingyu Li <xli399@....edu>
To: dhowells@...hat.com, marc.dionne@...istor.com, davem@...emloft.net, 
	edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com, 
	linux-afs@...ts.infradead.org, netdev@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Cc: Yu Hao <yhao016@....edu>
Subject: BUG: corrupted list in rxrpc_discard_prealloc

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:

bond0 (unregistering): Released all slaves
list_del corruption. next->prev should be ffff88801ef15218, but was
0000000000000000. (next=ffff88802ed18218)
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:67!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI
CPU: 0 PID: 2790 Comm: kworker/u4:9 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:ffffc900097ef8e8 EFLAGS: 00010246
RAX: 000000000000006d RBX: ffff88802ed18220 RCX: 12f0e8d01e569d00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffff888041824064 R08: ffffffff8172e30c R09: 1ffff920012fdebc
R10: dffffc0000000000 R11: fffff520012fdebd R12: dffffc0000000000
R13: ffff88801ef15000 R14: ffff88802ed18218 R15: ffff88801ef15218
FS:  0000000000000000(0000) GS:ffff888063a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005605ff865d58 CR3: 0000000040bd2000 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]
 rxrpc_discard_prealloc+0x27e/0x800 net/rxrpc/call_accept.c:208
 rxrpc_listen+0x280/0x3a0 net/rxrpc/af_rxrpc.c:246
 afs_close_socket+0xa4/0x310 fs/afs/rxrpc.c:112
 afs_net_exit+0x5b/0xf0 fs/afs/main.c:155
 ops_exit_list net/core/net_namespace.c:173 [inline]
 cleanup_net+0x810/0xcd0 net/core/net_namespace.c:640
 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:ffffc900097ef8e8 EFLAGS: 00010246
RAX: 000000000000006d RBX: ffff88802ed18220 RCX: 12f0e8d01e569d00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffff888041824064 R08: ffffffff8172e30c R09: 1ffff920012fdebc
R10: dffffc0000000000 R11: fffff520012fdebd R12: dffffc0000000000
R13: ffff88801ef15000 R14: ffff88802ed18218 R15: ffff88801ef15218
FS:  0000000000000000(0000) GS:ffff888063a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005605ff865d58 CR3: 0000000040bd2000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400


-- 
Yours sincerely,
Xingyu