WARNING: CPU: 0 PID: 21581 at fs/attr.c:234 notify_change+0xca0/0xfb0 fs/attr.c:234
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 21581 Comm: syz-executor.0 Not tainted 4.19.53+ #25
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x172/0x1f0 lib/dump_stack.c:113
 panic+0x263/0x507 kernel/panic.c:185
kobject: 'loop3' (00000000f2d32dc3): kobject_uevent_env
 __warn.cold+0x20/0x4a kernel/panic.c:540
 report_bug+0x263/0x2b0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 fixup_bug arch/x86/kernel/traps.c:173 [inline]
 do_error_trap+0x204/0x360 arch/x86/kernel/traps.c:296
kobject: 'loop3' (00000000f2d32dc3): fill_kobj_path: path = '/devices/virtual/block/loop3'
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:316
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1013
RIP: 0010:notify_change+0xca0/0xfb0 fs/attr.c:234
Code: c6 e6 09 00 e8 81 54 b9 ff 4c 8b 7c 24 20 4c 89 ff e8 64 11 43 01 89 de 4c 89 ff e8 4a 2d 43 01 e9 35 fa ff ff e8 60 54 b9 ff <0f> 0b e9 44 f4 ff ff e8 54 54 b9 ff 44 89 f3 4c 89 ea 48 b8 00 00
RSP: 0018:ffff888054db74d0 EFLAGS: 00010212
kobject: 'loop4' (000000001f36f4ad): kobject_uevent_env
RAX: 0000000000040000 RBX: 0000000000004200 RCX: ffffc90005e5f000
kobject: 'loop4' (000000001f36f4ad): fill_kobj_path: path = '/devices/virtual/block/loop4'
RDX: 0000000000005674 RSI: ffffffff81b1c250 RDI: 0000000000000007
RBP: ffff888054db7520 R08: ffff888089b64240 R09: ffffed10148dcb8e
R10: ffffed10148dcb8d R11: ffff8880a46e5c6f R12: ffff888054db7570
R13: ffff8880a46e5b90 R14: 0000000000000000 R15: ffff888054db7600
 __remove_privs fs/inode.c:1806 [inline]
 file_remove_privs+0x2a9/0x480 fs/inode.c:1828
 __generic_file_write_iter+0x15e/0x630 mm/filemap.c:3210
 blkdev_write_iter fs/block_dev.c:1924 [inline]
 blkdev_write_iter+0x233/0x440 fs/block_dev.c:1901
 call_write_iter include/linux/fs.h:1820 [inline]
 do_iter_readv_writev+0x558/0x830 fs/read_write.c:681
 do_iter_write fs/read_write.c:960 [inline]
 do_iter_write+0x184/0x5f0 fs/read_write.c:941
 vfs_iter_write+0x77/0xb0 fs/read_write.c:973
 iter_file_splice_write+0x661/0xbd0 fs/splice.c:750
 do_splice_from fs/splice.c:852 [inline]
 direct_splice_actor+0x123/0x190 fs/splice.c:1019
 splice_direct_to_actor+0x2e7/0x890 fs/splice.c:974
 do_splice_direct+0x1da/0x2a0 fs/splice.c:1062
 do_sendfile+0x597/0xce0 fs/read_write.c:1447
 __do_sys_sendfile64 fs/read_write.c:1508 [inline]
 __se_sys_sendfile64 fs/read_write.c:1494 [inline]
 __x64_sys_sendfile64+0x1dd/0x220 fs/read_write.c:1494
 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4592c9
Code: fd b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f553a6a5c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00000000004592c9
RDX: 0000000000000000 RSI: 0000000000000007 RDI: 0000000000000006
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 002000010200f399 R11: 0000000000000246 R12: 00007f553a6a66d4
R13: 00000000004c689d R14: 00000000004db828 R15: 00000000ffffffff
Kernel Offset: disabled
Rebooting in 86400 seconds..