------------[ cut here ]------------
PM: Basic memory bitmaps created
WARNING: CPU: 1 PID: 16621 at fs/attr.c:213 notify_change+0xa2f/0xd10 fs/attr.c:213
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 16621 Comm: syz-executor.4 Not tainted 4.14.128 #22
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+0x138/0x19c lib/dump_stack.c:53
 panic+0x1f2/0x426 kernel/panic.c:182
PM: Basic memory bitmaps freed
 __warn.cold+0x2f/0x36 kernel/panic.c:546
PM: Marking nosave pages: [mem 0x00000000-0x00000fff]
 report_bug+0x216/0x254 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+0x1bb/0x310 arch/x86/kernel/traps.c:295
PM: Marking nosave pages: [mem 0x0009f000-0x000fffff]
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:314
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:960
RIP: 0010:notify_change+0xa2f/0xd10 fs/attr.c:213
RSP: 0018:ffff8880480dfa60 EFLAGS: 00010212
RAX: 0000000000040000 RBX: ffff8880a439b630 RCX: ffffc90009e6d000
RDX: 00000000000000b7 RSI: ffffffff8193a78f RDI: ffff8880a439b710
PM: Marking nosave pages: [mem 0xbfffd000-0xffffffff]
RBP: ffff8880480dfab0 R08: ffff888097426180 R09: 0000000000000000
R10: 0000000000000000 R11: ffff888097426180 R12: ffff8880480dfb00
R13: 0000000000004200 R14: ffff8880a439b630 R15: ffff8880480dfb70
 __remove_privs fs/inode.c:1806 [inline]
 file_remove_privs+0x229/0x430 fs/inode.c:1828
 __generic_file_write_iter+0x15e/0x5b0 mm/filemap.c:3095
 blkdev_write_iter fs/block_dev.c:1914 [inline]
 blkdev_write_iter+0x1e8/0x3a0 fs/block_dev.c:1891
 call_write_iter include/linux/fs.h:1777 [inline]
 new_sync_write fs/read_write.c:469 [inline]
 __vfs_write+0x4a7/0x6b0 fs/read_write.c:482
 vfs_write+0x198/0x500 fs/read_write.c:544
 SYSC_write fs/read_write.c:590 [inline]
 SyS_write+0xfd/0x230 fs/read_write.c:582
PM: Basic memory bitmaps created
 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x4592c9
RSP: 002b:00007f8ff2e03c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004592c9
RDX: 000000000000000a RSI: 0000000020000200 RDI: 0000000000000005
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f8ff2e046d4
PM: Basic memory bitmaps freed
R13: 00000000004c9066 R14: 00000000004dff98 R15: 00000000ffffffff
Kernel Offset: disabled
Rebooting in 86400 seconds..