IPVS: ftp: loaded support on port[0] = 21
WARNING: CPU: 0 PID: 6798 at fs/attr.c:213 notify_change+0xd94/0x10c0 fs/attr.c:213
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 6798 Comm: syz-executor0 Not tainted 4.16.0+ #4
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+0x1b9/0x294 lib/dump_stack.c:113
 panic+0x22f/0x4de kernel/panic.c:184
 __warn.cold.8+0x163/0x1b3 kernel/panic.c:536
 report_bug+0x252/0x2d0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 do_error_trap+0x1de/0x490 arch/x86/kernel/traps.c:296
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:991
RIP: 0010:notify_change+0xd94/0x10c0 fs/attr.c:213
RSP: 0018:ffff8801ad747860 EFLAGS: 00010293
RAX: ffff8801b00ce1c0 RBX: ffff8801d331bb60 RCX: ffffffff81c3e088
RDX: 0000000000000000 RSI: ffffffff81c3ecc4 RDI: 0000000000000007
RBP: ffff8801ad747930 R08: ffff8801b00ce1c0 R09: ffffed003a663788
R10: ffffed003a663788 R11: ffff8801d331bc47 R12: 0000000000004200
R13: ffff8801ad747970 R14: ffff8801d52d7840 R15: 1ffff10035ae8f18
 __remove_privs fs/inode.c:1812 [inline]
 file_remove_privs+0x2bf/0x530 fs/inode.c:1834
 __generic_file_write_iter+0x169/0x5e0 mm/filemap.c:3211
 blkdev_write_iter+0x233/0x420 fs/block_dev.c:1910
 call_write_iter include/linux/fs.h:1784 [inline]
 new_sync_write fs/read_write.c:474 [inline]
 __vfs_write+0x5bc/0x880 fs/read_write.c:487
 vfs_write+0x1f8/0x560 fs/read_write.c:549
 ksys_write+0xf9/0x250 fs/read_write.c:598
 SYSC_write fs/read_write.c:610 [inline]
 SyS_write+0x24/0x30 fs/read_write.c:607
 do_syscall_64+0x29e/0x9d0 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x455319
RSP: 002b:00007ffbc508cc68 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007ffbc508d6d4 RCX: 0000000000455319
RDX: 0000000000000003 RSI: 0000000020000b80 RDI: 0000000000000004
RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000006bd R14: 00000000006fd258 R15: 0000000000000000
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..