print_req_error: I/O error, dev loop0, sector 0
Buffer I/O error on dev loop0, logical block 0, lost async page write
loop: Write error at byte offset 0, length 4096.
print_req_error: I/O error, dev loop0, sector 0
Buffer I/O error on dev loop0, logical block 0, lost async page write
WARNING: CPU: 0 PID: 9917 at fs/buffer.c:1079 mark_buffer_dirty+0x555/0x6b0 fs/buffer.c:1079
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 9917 Comm: syz-executor2 Not tainted 4.17.0-rc2+ #44
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+0x1b9/0x294 lib/dump_stack.c:113
 panic+0x22f/0x4de kernel/panic.c:184
 __warn.cold.8+0x163/0x1b3 kernel/panic.c:536
 report_bug+0x252/0x2d0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 do_error_trap+0x1de/0x490 arch/x86/kernel/traps.c:296
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:992
RIP: 0010:mark_buffer_dirty+0x555/0x6b0 fs/buffer.c:1079
RSP: 0018:ffff8801b76cf028 EFLAGS: 00010293
RAX: ffff8801b0464740 RBX: ffff8801b8b43e70 RCX: ffffffff81cf57bf
RDX: 0000000000000000 RSI: ffffffff81cf5c65 RDI: 0000000000000007
RBP: ffff8801b76cf138 R08: ffff8801b0464740 R09: ffffea0006bd8c00
R10: ffffed0035ec6000 R11: ffff8801af630006 R12: 1ffff10036ed9e06
R13: 0000000000000000 R14: ffff8801b76cf110 R15: dffffc0000000000
 __block_commit_write.isra.35+0x19a/0x390 fs/buffer.c:2031
 block_write_end+0xa5/0x260 fs/buffer.c:2109
 blkdev_write_end+0xc5/0x2d0 fs/block_dev.c:593
 generic_perform_write+0x4c9/0x6a0 mm/filemap.c:3150
 __generic_file_write_iter+0x26e/0x630 mm/filemap.c:3264
 blkdev_write_iter+0x233/0x420 fs/block_dev.c:1910
 call_write_iter include/linux/fs.h:1784 [inline]
 do_iter_readv_writev+0x859/0xa50 fs/read_write.c:680
 do_iter_write+0x185/0x5f0 fs/read_write.c:959
 vfs_iter_write+0x77/0xb0 fs/read_write.c:972
 iter_file_splice_write+0x8cb/0xff0 fs/splice.c:749
 do_splice_from fs/splice.c:851 [inline]
 direct_splice_actor+0x128/0x190 fs/splice.c:1018
 splice_direct_to_actor+0x310/0x8d0 fs/splice.c:973
 do_splice_direct+0x2cc/0x400 fs/splice.c:1061
 do_sendfile+0x60f/0xe00 fs/read_write.c:1440
 __do_compat_sys_sendfile fs/read_write.c:1516 [inline]
 __se_compat_sys_sendfile fs/read_write.c:1505 [inline]
 __ia32_compat_sys_sendfile+0x187/0x290 fs/read_write.c:1505
 do_syscall_32_irqs_on arch/x86/entry/common.c:323 [inline]
 do_fast_syscall_32+0x345/0xf9b arch/x86/entry/common.c:394
 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139
RIP: 0023:0xf7f5bcb9
RSP: 002b:00000000f7f570ac EFLAGS: 00000282 ORIG_RAX: 00000000000000bb
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000000004
RDX: 0000000020000000 RSI: 0000000000000007 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..