linux-kernel - Re: [syzbot] [net?] WARNING in __unix

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Date: Fri, 02 Feb 2024 19:17:04 -0800
From: syzbot <syzbot+fa3ef895554bdbfd1183@...kaller.appspotmail.com>
To: hdanton@...a.com, linux-kernel@...r.kernel.org, 
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [net?] WARNING in __unix_gc

Hello,

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

------------[ cut here ]------------
WARNING: CPU: 1 PID: 11 at net/unix/garbage.c:350 __unix_gc+0xe90/0xec0 net/unix/garbage.c:350
Modules linked in:
CPU: 1 PID: 11 Comm: kworker/u4:0 Not tainted 6.8.0-rc2-syzkaller-g73c59d6fe109-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Workqueue: events_unbound __unix_gc
RIP: 0010:__unix_gc+0xe90/0xec0 net/unix/garbage.c:350
Code: 8b 04 25 28 00 00 00 48 3b 84 24 20 01 00 00 75 40 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc e8 31 9a 8b f7 90 <0f> 0b 90 eb 8e 48 8b 4c 24 08 80 e1 07 80 c1 03 38 c1 0f 8c e4 fb
RSP: 0018:ffffc90000107a80 EFLAGS: 00010293
RAX: ffffffff8a07bc2f RBX: 0000000000000000 RCX: ffff8880172ebb80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000107bf0 R08: ffffffff8a07bbb3 R09: fffff52000020f40
R10: dffffc0000000000 R11: fffff52000020f40 R12: 1ffff92000020f5e
R13: ffffc90000107ae0 R14: ffffc90000107ae0 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f83579e65e8 CR3: 000000000df34000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 process_one_work kernel/workqueue.c:2633 [inline]
 process_scheduled_works+0x973/0x14b0 kernel/workqueue.c:2706
 worker_thread+0xa5f/0x1000 kernel/workqueue.c:2787
 kthread+0x2ef/0x390 kernel/kthread.c:388
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:242
 </TASK>


Tested on:

commit:         73c59d6f Merge branch 'net-sched-load-modules-via-alias'
git tree:       net-next
console output: https://syzkaller.appspot.com/x/log.txt?x=14fdf6ffe80000
kernel config:  https://syzkaller.appspot.com/x/.config?x=a2ad00c8608f36a5
dashboard link: https://syzkaller.appspot.com/bug?extid=fa3ef895554bdbfd1183
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
patch:          https://syzkaller.appspot.com/x/patch.diff?x=1384e09fe80000