Buffer I/O error on dev loop0, logical block 7, lost async page write
loop: Write error at byte offset 32768, length 4096.
Buffer I/O error on dev loop0, logical block 8, lost async page write
loop: Write error at byte offset 36864, length 4096.
Buffer I/O error on dev loop0, logical block 9, lost async page write
WARNING: CPU: 0 PID: 10732 at fs/buffer.c:1079 mark_buffer_dirty+0x571/0x6d0 fs/buffer.c:1079
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 10732 Comm: syz-executor4 Not tainted 4.18.0-rc5+ #159
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+0x1c9/0x2b4 lib/dump_stack.c:113
 panic+0x238/0x4e7 kernel/panic.c:184
 __warn.cold.8+0x163/0x1ba kernel/panic.c:536
 report_bug+0x252/0x2d0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 do_error_trap+0x1fc/0x4d0 arch/x86/kernel/traps.c:296
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:316
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:992
RIP: 0010:mark_buffer_dirty+0x571/0x6d0 fs/buffer.c:1079
Code: 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 2b 01 00 00 49 8b 3c 24 be 04 00 00 00 e8 59 2a fd ff e9 ea fb ff ff e8 2f cc a7 ff <0f> 0b e9 47 fb ff ff e8 23 cc a7 ff e8 de 93 91 ff 31 ff 41 89 c4 
RSP: 0018:ffff88018fbaf070 EFLAGS: 00010212
RAX: 0000000000040000 RBX: ffff88018ae54348 RCX: ffffc90007648000
RDX: 000000000002360e RSI: ffffffff81d44ba1 RDI: 0000000000000007
RBP: ffff88018fbaf180 R08: ffff8801b451c5c0 R09: ffffea0006f8a940
R10: ffffed0037c54bff R11: ffff8801be2a5fff R12: 0000000000000000
R13: 1ffff10031f75e0f R14: ffff88018fbaf158 R15: dffffc0000000000
 __block_commit_write.isra.36+0x1a2/0x3b0 fs/buffer.c:2031
 block_write_end+0xab/0x270 fs/buffer.c:2109
 blkdev_write_end+0xd6/0x2f0 fs/block_dev.c:593
 generic_perform_write+0x4e0/0x6c0 mm/filemap.c:3150
 __generic_file_write_iter+0x26e/0x630 mm/filemap.c:3264
 blkdev_write_iter+0x23f/0x450 fs/block_dev.c:1913
 call_write_iter include/linux/fs.h:1793 [inline]
 do_iter_readv_writev+0x897/0xa90 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+0x8e7/0x1010 fs/splice.c:750
 do_splice_from fs/splice.c:852 [inline]
 direct_splice_actor+0x128/0x190 fs/splice.c:1019
 splice_direct_to_actor+0x318/0x8f0 fs/splice.c:974
 do_splice_direct+0x2d4/0x420 fs/splice.c:1062
 do_sendfile+0x623/0xe20 fs/read_write.c:1440
 __do_sys_sendfile64 fs/read_write.c:1495 [inline]
 __se_sys_sendfile64 fs/read_write.c:1487 [inline]
 __x64_sys_sendfile64+0x15d/0x250 fs/read_write.c:1487
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x455ab9
Code: 1d ba 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 eb b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00 
RSP: 002b:00007f29718a0c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f29718a16d4 RCX: 0000000000455ab9
RDX: 0000000020000000 RSI: 0000000000000013 RDI: 0000000000000013
RBP: 000000000072c098 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000002000005 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004c0d79 R14: 00000000004d1380 R15: 0000000000000003
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..