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SubjectWARNING in strp_done (2)

syzbot found the following crash on:

HEAD commit: 02495e76ded5 Add linux-next specific files for 20190130
git tree: linux-next
console output:
kernel config:
dashboard link:
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
syz repro:

IMPORTANT: if you fix the bug, please add the following tag to the commit:

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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