WARNING in strp_done (2)

From: syzbot <syzbot+ea38a133bb90dd367b6e@syzkaller.appspotmail.com>
To: ast@kernel.org, daniel@iogearbox.net, davejwatson@fb.com,
	davem@davemloft.net, doronrk@fb.com, kafai@fb.com,
	linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
	songliubraving@fb.com, syzkaller-bugs@googlegroups.com,
	vakul.garg@nxp.com, yhs@fb.com, yuehaibing@huawei.com
Subject: WARNING in strp_done (2)
Date: Wed, 30 Jan 2019 10:53:04 -0800	[thread overview]
Message-ID: <0000000000007c36aa0580b16b56@google.com> (raw)

Hello,

syzbot found the following crash on:

HEAD commit:    02495e76ded5 Add linux-next specific files for 20190130
git tree:       linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=16a00c2f400000
kernel config:  https://syzkaller.appspot.com/x/.config?x=a2b2e9c0bc43c14d
dashboard link: https://syzkaller.appspot.com/bug?extid=ea38a133bb90dd367b6e
compiler:       gcc (GCC) 9.0.0 20181231 (experimental)
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=14b059ef400000

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+ea38a133bb90dd367b6e@syzkaller.appspotmail.com

IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready
WARNING: CPU: 0 PID: 7927 at net/strparser/strparser.c:526  
strp_done+0xca/0xf0 net/strparser/strparser.c:526
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 7927 Comm: kworker/0:3 Not tainted 5.0.0-rc4-next-20190130 #22
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS  
Google 01/01/2011
Workqueue: events sk_psock_destroy_deferred
Call Trace:
  __dump_stack lib/dump_stack.c:77 [inline]
  dump_stack+0x1db/0x2d0 lib/dump_stack.c:113
  panic+0x2cb/0x65c kernel/panic.c:214
  __warn.cold+0x20/0x48 kernel/panic.c:571
  report_bug+0x263/0x2b0 lib/bug.c:186
  fixup_bug arch/x86/kernel/traps.c:178 [inline]
  fixup_bug arch/x86/kernel/traps.c:173 [inline]
  do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:271
  do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:290
  invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:973
RIP: 0010:strp_done+0xca/0xf0 net/strparser/strparser.c:526
Code: 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 75 31 48 c7 43 18 00 00  
00 00 e8 82 bc 40 fa 5b 41 5c 41 5d 5d c3 e8 76 bc 40 fa <0f> 0b eb 81 e8  
1d 7e 85 fa e9 5c ff ff ff 4c 89 e7 e8 70 7e 85 fa
RSP: 0018:ffff88808a7a7900 EFLAGS: 00010293
RAX: ffff88808f9343c0 RBX: ffff8880a7fa9240 RCX: ffffffff87415c5a
RDX: 0000000000000000 RSI: ffffffff87415cda RDI: 0000000000000001
RBP: ffff88808a7a7918 R08: ffff88808f9343c0 R09: ffffed1015cc5b80
R10: ffffed1015cc5b7f R11: ffff8880ae62dbfb R12: 0000000000000001
R13: 1ffff110114f4f71 R14: ffff8880a7fa9200 R15: ffff88809fda3e00
  sk_psock_destroy_deferred+0x8b/0x7f0 net/core/skmsg.c:557
  process_one_work+0xd0c/0x1ce0 kernel/workqueue.c:2153
  worker_thread+0x143/0x14a0 kernel/workqueue.c:2296
  kthread+0x357/0x430 kernel/kthread.c:247
  ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
Kernel Offset: disabled
Rebooting in 86400 seconds..

---
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