------------[ cut here ]------------
WARNING: CPU: 1 PID: 11010 at fs/attr.c:211 notify_change2+0xae2/0xd90 fs/attr.c:211
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 11010 Comm: syz-executor.5 Not tainted 4.9.171+ #49
 ffff8801d1c67430 ffffffff81b4fb61 0000000000000000 ffffffff82a39c20
 00000000ffffffff 0000000000000001 0000000000000009 ffff8801d1c67510
 ffffffff813f96aa 0000000041b58ab3 ffffffff82e2efd2 ffffffff813f94d1
Call Trace:
 [<00000000f13d0018>] __dump_stack lib/dump_stack.c:15 [inline]
 [<00000000f13d0018>] dump_stack+0xc1/0x120 lib/dump_stack.c:51
 [<000000002527fc16>] panic+0x1d9/0x3bd kernel/panic.c:180
 [<000000006482d772>] __warn.cold+0x2f/0x2f kernel/panic.c:546
 [<000000005b4a8c5d>] warn_slowpath_null+0x2d/0x40 kernel/panic.c:589
 [<00000000268125b4>] notify_change2+0xae2/0xd90 fs/attr.c:211
 [<00000000841b79a1>] __remove_privs fs/inode.c:1793 [inline]
 [<00000000841b79a1>] file_remove_privs+0x285/0x4b0 fs/inode.c:1815
 [<0000000008f93225>] __generic_file_write_iter+0x157/0x530 mm/filemap.c:3010
 [<00000000c0e64d1b>] blkdev_write_iter fs/block_dev.c:1726 [inline]
 [<00000000c0e64d1b>] blkdev_write_iter+0x1bb/0x370 fs/block_dev.c:1706
 [<00000000f643cc35>] vfs_iter_write+0x2e2/0x580 fs/read_write.c:390
 [<000000001bfe42cd>] iter_file_splice_write+0x5a9/0xb10 fs/splice.c:768
 [<0000000031c88ce0>] do_splice_from fs/splice.c:870 [inline]
 [<0000000031c88ce0>] direct_splice_actor+0x126/0x1a0 fs/splice.c:1037
 [<000000002ca07bff>] splice_direct_to_actor+0x2c8/0x820 fs/splice.c:992
 [<00000000b06e9362>] do_splice_direct+0x1a5/0x260 fs/splice.c:1080
 [<00000000df3d6c5a>] do_sendfile+0x503/0xc00 fs/read_write.c:1401
 [<00000000230dd383>] SYSC_sendfile64 fs/read_write.c:1462 [inline]
 [<00000000230dd383>] SyS_sendfile64+0x145/0x160 fs/read_write.c:1448
 [<000000004cbc1162>] do_syscall_64+0x1ad/0x570 arch/x86/entry/common.c:285
 [<00000000af191b2e>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Kernel Offset: disabled
Rebooting in 86400 seconds..