------------[ cut here ]------------
WARNING: CPU: 1 PID: 21563 at fs/attr.c:211 notify_change2+0xae2/0xd90 fs/attr.c:211
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 21563 Comm: syz-executor.1 Not tainted 4.9.180+ #4
 ffff8801a3857430 ffffffff81b577f1 0000000000000000 ffffffff82a3a960
 00000000ffffffff 0000000000000001 0000000000000009 ffff8801a3857510
 ffffffff813fd2fa 0000000041b58ab3 ffffffff82e30d0a ffffffff813fd121
Call Trace:
 [<000000009f53499f>] __dump_stack lib/dump_stack.c:15 [inline]
 [<000000009f53499f>] dump_stack+0xc1/0x120 lib/dump_stack.c:51
 [<00000000ad585767>] panic+0x1d9/0x3bd kernel/panic.c:180
 [<00000000eeea18af>] __warn.cold+0x2f/0x2f kernel/panic.c:546
 [<00000000f4e14d2c>] warn_slowpath_null+0x2d/0x40 kernel/panic.c:589
 [<0000000041ffab05>] notify_change2+0xae2/0xd90 fs/attr.c:211
 [<00000000989057cd>] __remove_privs fs/inode.c:1793 [inline]
 [<00000000989057cd>] file_remove_privs+0x285/0x4b0 fs/inode.c:1815
 [<0000000052206a34>] __generic_file_write_iter+0x157/0x530 mm/filemap.c:3010
 [<00000000877a23ac>] blkdev_write_iter fs/block_dev.c:1726 [inline]
 [<00000000877a23ac>] blkdev_write_iter+0x1bb/0x370 fs/block_dev.c:1706
 [<00000000afc44731>] vfs_iter_write+0x2e2/0x580 fs/read_write.c:390
 [<0000000086e5a5d3>] iter_file_splice_write+0x5a9/0xb10 fs/splice.c:768
 [<00000000bc0898a9>] do_splice_from fs/splice.c:870 [inline]
 [<00000000bc0898a9>] direct_splice_actor+0x126/0x1a0 fs/splice.c:1037
 [<000000000b772b59>] splice_direct_to_actor+0x2c8/0x820 fs/splice.c:992
 [<00000000687e755c>] do_splice_direct+0x1a5/0x260 fs/splice.c:1080
 [<0000000095ebac8c>] do_sendfile+0x503/0xc00 fs/read_write.c:1401
 [<0000000078079f4c>] SYSC_sendfile64 fs/read_write.c:1456 [inline]
 [<0000000078079f4c>] SyS_sendfile64+0xd1/0x160 fs/read_write.c:1448
 [<0000000063661ecf>] do_syscall_64+0x1ad/0x5c0 arch/x86/entry/common.c:288
 [<000000009c0dcc1c>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Kernel Offset: disabled
Rebooting in 86400 seconds..