Messages in this thread | | | Date | Wed, 07 Jul 2021 14:25:23 -0700 | Subject | [syzbot] WARNING in dec_ucount | From | syzbot <> |
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Hello,
syzbot found the following issue on:
HEAD commit: 3dbdb38e Merge branch 'for-5.14' of git://git.kernel.org/p.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1023db52300000 kernel config: https://syzkaller.appspot.com/x/.config?x=a1fcf15a09815757 dashboard link: https://syzkaller.appspot.com/bug?extid=493df5f976efd79b9b66
Unfortunately, I don't have any reproducer for this issue yet.
IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+493df5f976efd79b9b66@syzkaller.appspotmail.com
------------[ cut here ]------------ WARNING: CPU: 1 PID: 22176 at kernel/ucount.c:246 dec_ucount+0x10d/0x130 kernel/ucount.c:246 Modules linked in: CPU: 1 PID: 22176 Comm: kworker/u4:3 Tainted: G W 5.13.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: netns cleanup_net RIP: 0010:dec_ucount+0x10d/0x130 kernel/ucount.c:246 Code: 4d 85 e4 0f 85 52 ff ff ff e8 0f f7 26 00 48 8b 3c 24 48 83 c4 08 5b 5d 41 5c 41 5d 41 5e 41 5f e9 28 f5 ff ff e8 f3 f6 26 00 <0f> 0b eb 99 48 89 ef e8 97 b4 6c 00 e9 48 ff ff ff e8 8d b4 6c 00 RSP: 0018:ffffc90023a1fc38 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff8881626354c0 RSI: ffffffff814e933d RDI: 0000000000000003 RBP: ffff8880192d3240 R08: 0000000000000000 R09: ffff8880192d3247 R10: ffffffff814e92ad R11: 0000000000000000 R12: ffff8880192d3200 R13: dffffc0000000000 R14: 0000000000000040 R15: ffffffffffffffff FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000014a401000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: dec_net_namespaces net/core/net_namespace.c:394 [inline] cleanup_net+0x6f3/0xb10 net/core/net_namespace.c:611 process_one_work+0x98d/0x1630 kernel/workqueue.c:2276 worker_thread+0x658/0x11f0 kernel/workqueue.c:2422 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
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