------------[ cut here ]------------
WARNING: CPU: 1 PID: 9026 at fs/attr.c:211 notify_change2+0xae2/0xd90 fs/attr.c:211
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 9026 Comm: syz-executor.0 Not tainted 4.9.172+ #50
 ffff88015d2e7430 ffffffff81b4fc11 0000000000000000 ffffffff82a39c20
 00000000ffffffff 0000000000000001 0000000000000009 ffff88015d2e7510
 ffffffff813f970a 0000000041b58ab3 ffffffff82e2f182 ffffffff813f9531
Call Trace:
 [<0000000058f633d5>] __dump_stack lib/dump_stack.c:15 [inline]
 [<0000000058f633d5>] dump_stack+0xc1/0x120 lib/dump_stack.c:51
 [<000000006978434c>] panic+0x1d9/0x3bd kernel/panic.c:180
 [<00000000851970ae>] __warn.cold+0x2f/0x2f kernel/panic.c:546
 [<000000009bab2661>] warn_slowpath_null+0x2d/0x40 kernel/panic.c:589
 [<0000000080ab9a12>] notify_change2+0xae2/0xd90 fs/attr.c:211
 [<00000000fc4ad6e2>] __remove_privs fs/inode.c:1793 [inline]
 [<00000000fc4ad6e2>] file_remove_privs+0x285/0x4b0 fs/inode.c:1815
 [<000000006a57eeff>] __generic_file_write_iter+0x157/0x530 mm/filemap.c:3010
 [<0000000051e2fcd5>] blkdev_write_iter fs/block_dev.c:1726 [inline]
 [<0000000051e2fcd5>] blkdev_write_iter+0x1bb/0x370 fs/block_dev.c:1706
 [<00000000fb0478fb>] vfs_iter_write+0x2e2/0x580 fs/read_write.c:390
 [<000000004fc56f76>] iter_file_splice_write+0x5a9/0xb10 fs/splice.c:768
 [<0000000042ab36c2>] do_splice_from fs/splice.c:870 [inline]
 [<0000000042ab36c2>] direct_splice_actor+0x126/0x1a0 fs/splice.c:1037
 [<00000000fca32549>] splice_direct_to_actor+0x2c8/0x820 fs/splice.c:992
 [<000000000644deb2>] do_splice_direct+0x1a5/0x260 fs/splice.c:1080
 [<0000000080c9a7e2>] do_sendfile+0x503/0xc00 fs/read_write.c:1401
 [<000000009ab108d2>] SYSC_sendfile64 fs/read_write.c:1462 [inline]
 [<000000009ab108d2>] SyS_sendfile64+0x145/0x160 fs/read_write.c:1448
 [<00000000b8f0f20e>] do_syscall_64+0x1ad/0x570 arch/x86/entry/common.c:285
 [<000000007265d77d>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Kernel Offset: disabled
Rebooting in 86400 seconds..