------------[ cut here ]------------ WARNING: CPU: 0 PID: 8406 at net/kcm/kcmsock.c:629 kcm_write_msgs+0xf72/0x1740 net/kcm/kcmsock.c:629 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 8406 Comm: syz-executor414 Not tainted 4.14.175-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x13e/0x194 lib/dump_stack.c:58 panic+0x1f9/0x42d kernel/panic.c:183 __warn.cold+0x2f/0x30 kernel/panic.c:547 report_bug+0x20a/0x248 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:177 [inline] fixup_bug arch/x86/kernel/traps.c:172 [inline] do_error_trap+0x195/0x2d0 arch/x86/kernel/traps.c:295 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:963 RIP: 0010:kcm_write_msgs+0xf72/0x1740 net/kcm/kcmsock.c:629 RSP: 0018:ffff8880973679f8 EFLAGS: 00010297 RAX: ffff8880a4efe340 RBX: 00000000000000c0 RCX: 0000000000000007 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8880a5a41b42 RBP: ffff8880a5a41b40 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000008000 R13: ffff88808a69d380 R14: ffff8880a5a41a80 R15: 0000000000000000 kcm_sendmsg+0x1841/0x1df0 net/kcm/kcmsock.c:1035 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xc5/0x100 net/socket.c:656 sock_write_iter+0x22c/0x370 net/socket.c:925 call_write_iter include/linux/fs.h:1778 [inline] new_sync_write fs/read_write.c:469 [inline] __vfs_write+0x44e/0x630 fs/read_write.c:482 vfs_write+0x192/0x4e0 fs/read_write.c:544 SYSC_write fs/read_write.c:590 [inline] SyS_write+0xf2/0x210 fs/read_write.c:582 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x446b79 RSP: 002b:00007f2b8e2d3d98 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00000000006dbc48 RCX: 0000000000446b79 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005 RBP: 00000000006dbc40 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc4c R13: 00000000200003c0 R14: 00000000004aea28 R15: 000000000000d4f5 Kernel Offset: disabled Rebooting in 86400 seconds..