All of lore.kernel.org
 help / color / mirror / Atom feed
From: syzbot <syzbot+dfdfbdef099aa0f92df1@syzkaller.appspotmail.com>
To: davem@davemloft.net, dhowells@redhat.com, edumazet@google.com,
	gnault@redhat.com, linux-kernel@vger.kernel.org,
	netdev@vger.kernel.org, nicolas.dichtel@6wind.com,
	syzkaller-bugs@googlegroups.com
Subject: WARNING in default_device_exit_batch
Date: Thu, 30 Jan 2020 02:14:12 -0800	[thread overview]
Message-ID: <000000000000f1bced059d58b712@google.com> (raw)

Hello,

syzbot found the following crash on:

HEAD commit:    08a45c59 Merge branch 'mptcp-part-two'
git tree:       net-next
console output: https://syzkaller.appspot.com/x/log.txt?x=1799f721e00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=8d2cca7133bc3ccc
dashboard link: https://syzkaller.appspot.com/bug?extid=dfdfbdef099aa0f92df1
compiler:       gcc (GCC) 9.0.0 20181231 (experimental)

Unfortunately, I don't have any reproducer for this crash yet.

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+dfdfbdef099aa0f92df1@syzkaller.appspotmail.com

bond2 (unregistering): Released all slaves
------------[ cut here ]------------
WARNING: CPU: 1 PID: 7 at net/core/dev.c:8782 rollback_registered_many+0xcca/0x1030 net/core/dev.c:8782
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 7 Comm: kworker/u4:0 Not tainted 5.5.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x197/0x210 lib/dump_stack.c:118
 panic+0x2e3/0x75c kernel/panic.c:221
 __warn.cold+0x2f/0x3e kernel/panic.c:582
 report_bug+0x289/0x300 lib/bug.c:195
 fixup_bug arch/x86/kernel/traps.c:174 [inline]
 fixup_bug arch/x86/kernel/traps.c:169 [inline]
 do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:267
 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:286
 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027
RIP: 0010:rollback_registered_many+0xcca/0x1030 net/core/dev.c:8782
Code: 6b 1a 00 00 48 c7 c6 40 b7 d6 88 48 c7 c7 20 b8 d6 88 c6 05 03 9f 52 04 01 e8 51 3b 20 fb 0f 0b e9 a1 fd ff ff e8 46 8b 4f fb <0f> 0b e9 76 fd ff ff e8 3a 8b 4f fb 0f 0b e9 af fa ff ff e8 2e 8b
RSP: 0018:ffffc90000cdf9c0 EFLAGS: 00010293
RAX: ffff8880a99a81c0 RBX: ffff888057e90000 RCX: ffffffff862571fe
RDX: 0000000000000000 RSI: ffffffff8625748a RDI: 0000000000000001
RBP: ffffc90000cdfae8 R08: ffff8880a99a81c0 R09: fffffbfff149c655
R10: fffffbfff149c654 R11: ffffffff8a4e32a7 R12: ffff8880946ee6c0
R13: dffffc0000000000 R14: 00000000a0105a01 R15: ffffc90000cdfac0
 unregister_netdevice_many.part.0+0x1b/0x1f0 net/core/dev.c:9912
 unregister_netdevice_many net/core/dev.c:9911 [inline]
 default_device_exit_batch+0x360/0x420 net/core/dev.c:10385
 ops_exit_list.isra.0+0x10c/0x160 net/core/net_namespace.c:175
 cleanup_net+0x549/0xb10 net/core/net_namespace.c:589
 process_one_work+0x9af/0x1740 kernel/workqueue.c:2264
 worker_thread+0x98/0xe40 kernel/workqueue.c:2410
 kthread+0x361/0x430 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Kernel Offset: disabled
Rebooting in 86400 seconds..


---
This bug is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@googlegroups.com.

syzbot will keep track of this bug report. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.

                 reply	other threads:[~2020-01-30 10:14 UTC|newest]

Thread overview: [no followups] expand[flat|nested]  mbox.gz  Atom feed

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=000000000000f1bced059d58b712@google.com \
    --to=syzbot+dfdfbdef099aa0f92df1@syzkaller.appspotmail.com \
    --cc=davem@davemloft.net \
    --cc=dhowells@redhat.com \
    --cc=edumazet@google.com \
    --cc=gnault@redhat.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=netdev@vger.kernel.org \
    --cc=nicolas.dichtel@6wind.com \
    --cc=syzkaller-bugs@googlegroups.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.