------------[ cut here ]------------
WARNING: CPU: 1 PID: 9616 at net/kcm/kcmsock.c:629 kcm_write_msgs.cold+0x112/0x13f net/kcm/kcmsock.c:629
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 9616 Comm: syz-executor170 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
 panic+0x26a/0x50e kernel/panic.c:186
 __warn.cold+0x20/0x5a kernel/panic.c:541
 report_bug+0x262/0x2b0 lib/bug.c:183
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 fixup_bug arch/x86/kernel/traps.c:173 [inline]
 do_error_trap+0x1d7/0x310 arch/x86/kernel/traps.c:296
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1038
RIP: 0010:kcm_write_msgs.cold+0x112/0x13f net/kcm/kcmsock.c:629
Code: c7 44 24 58 00 00 00 00 48 8b 80 50 02 00 00 48 89 44 24 28 e9 b3 8e 4a ff e8 82 bf 4e f9 48 c7 c7 c0 33 62 89 e8 e1 f0 df ff <0f> 0b 8b 44 24 70 41 bc ea ff ff ff 89 44 24 58 e9 8d 8f 4a ff e8
RSP: 0018:ffff8880a300f988 EFLAGS: 00010282
RAX: 0000000000000024 RBX: 00000000000000c0 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff814dff01 RDI: ffffed1014601f23
RBP: ffff88809b94d0c0 R08: 0000000000000024 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000008000
R13: ffff88809dfd2f40 R14: ffff88809b94d000 R15: 0000000000000000
 kcm_sendmsg+0x1ba7/0x2100 net/kcm/kcmsock.c:1035
 sock_sendmsg_nosec net/socket.c:651 [inline]
 sock_sendmsg+0xc3/0x120 net/socket.c:661
 sock_write_iter+0x287/0x3c0 net/socket.c:966
 call_write_iter include/linux/fs.h:1821 [inline]
 new_sync_write fs/read_write.c:474 [inline]
 __vfs_write+0x51b/0x770 fs/read_write.c:487
 vfs_write+0x1f3/0x540 fs/read_write.c:549
 ksys_write+0x12b/0x2a0 fs/read_write.c:599
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f25eab06049
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 d1 15 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f25eaab32f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f25eab904e0 RCX: 00007f25eab06049
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 00007f25eab5cb84 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f25eab5c4f8
R13: 0000000020000240 R14: 656c6c616b7a7973 R15: 00007f25eab904e8
Kernel Offset: disabled
Rebooting in 86400 seconds..