------------[ cut here ]------------
WARNING: CPU: 1 PID: 8568 at net/kcm/kcmsock.c:629 kcm_write_msgs.cold.34+0x5f/0x13e net/kcm/kcmsock.c:629
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 8568 Comm: syz-executor.1 Not tainted 4.19.177-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x123/0x171 lib/dump_stack.c:118
 panic+0x1cd/0x375 kernel/panic.c:186
 __warn.cold.8+0x1b/0x36 kernel/panic.c:541
 report_bug+0x1a1/0x200 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+0x200/0x350 arch/x86/kernel/traps.c:296
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:316
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1038
RIP: 0010:kcm_write_msgs.cold.34+0x5f/0x13e net/kcm/kcmsock.c:629
Code: c7 c7 c0 6d d0 87 4c 89 5d d0 e8 7a 34 ec ff 0f 0b 4c 8b 5d d0 e9 ae d5 5f ff 48 c7 c7 c0 6d d0 87 4c 89 5d d0 e8 5f 34 ec ff <0f> 0b 8b 85 7c ff ff ff ba ea ff ff ff 4c 8b 5d d0 89 45 c4 e9 08
RSP: 0018:ffff8881dda878f8 EFLAGS: 00010282
RAX: 0000000000000024 RBX: ffff8881e7ce6680 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff876797e0 RDI: ffffffff8a1859a0
RBP: ffff8881dda879b8 R08: ffffed103ed25079 R09: ffffed103ed25078
R10: ffffed103ed25078 R11: ffff8881f69283c7 R12: 00000000000000c0
R13: ffff8881da9e21c0 R14: ffff8881dfd37380 R15: ffff8881e7ce65c0
 kcm_sendmsg+0x1897/0x25b0 net/kcm/kcmsock.c:1035
 sock_sendmsg_nosec net/socket.c:622 [inline]
 sock_sendmsg+0xb5/0xf0 net/socket.c:632
 sock_write_iter+0x215/0x420 net/socket.c:901
 call_write_iter include/linux/fs.h:1821 [inline]
 new_sync_write fs/read_write.c:474 [inline]
 __vfs_write+0x443/0x890 fs/read_write.c:487
 vfs_write+0x150/0x4d0 fs/read_write.c:549
 ksys_write+0x103/0x260 fs/read_write.c:599
 __do_sys_write fs/read_write.c:611 [inline]
 __se_sys_write fs/read_write.c:608 [inline]
 __x64_sys_write+0x6e/0xb0 fs/read_write.c:608
 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4641a9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f5009adf198 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000c4c RCX: 00000000004641a9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000053bf00
R13: 00007f5009adf6bc R14: 00000000ffffffff R15: 0000000000000003
Kernel Offset: disabled
Rebooting in 86400 seconds..