------------[ cut here ]------------
WARNING: CPU: 1 PID: 6801 at fs/attr.c:211 notify_change2+0xae2/0xd90 fs/attr.c:211
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 6801 Comm: syz-executor.5 Not tainted 4.9.182+ #2
 ffff8801c3d6f890 ffffffff81b57e21 0000000000000000 ffffffff82a3a960
 00000000ffffffff 0000000000000001 0000000000000009 ffff8801c3d6f970
 ffffffff813fd5da 0000000041b58ab3 ffffffff82e313da ffffffff813fd401
Call Trace:
 [<0000000088853793>] __dump_stack lib/dump_stack.c:15 [inline]
 [<0000000088853793>] dump_stack+0xc1/0x120 lib/dump_stack.c:51
 [<000000002f5710d8>] panic+0x1d9/0x3bd kernel/panic.c:180
 [<0000000032f8db95>] __warn.cold+0x2f/0x2f kernel/panic.c:546
 [<00000000df784a5e>] warn_slowpath_null+0x2d/0x40 kernel/panic.c:589
 [<0000000075a96964>] notify_change2+0xae2/0xd90 fs/attr.c:211
 [<0000000006de170a>] __remove_privs fs/inode.c:1793 [inline]
 [<0000000006de170a>] file_remove_privs+0x285/0x4b0 fs/inode.c:1815
 [<00000000b1c95e51>] __generic_file_write_iter+0x157/0x530 mm/filemap.c:3010
 [<0000000029973a40>] blkdev_write_iter fs/block_dev.c:1726 [inline]
 [<0000000029973a40>] blkdev_write_iter+0x1bb/0x370 fs/block_dev.c:1706
 [<00000000bbc4027f>] new_sync_write fs/read_write.c:498 [inline]
 [<00000000bbc4027f>] __vfs_write+0x3c1/0x560 fs/read_write.c:511
 [<0000000040ba40ad>] vfs_write+0x185/0x520 fs/read_write.c:559
 [<00000000988ef483>] SYSC_write fs/read_write.c:607 [inline]
 [<00000000988ef483>] SyS_write+0x121/0x270 fs/read_write.c:599
 [<000000003b20cf6b>] do_syscall_64+0x1ad/0x5c0 arch/x86/entry/common.c:288
 [<00000000159241ff>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Kernel Offset: disabled
Rebooting in 86400 seconds..