Buffer I/O error on dev loop0, logical block 7, lost async page write
print_req_error: I/O error, dev loop0, sector 64
Buffer I/O error on dev loop0, logical block 8, lost async page write
print_req_error: I/O error, dev loop0, sector 72
Buffer I/O error on dev loop0, logical block 9, lost async page write
WARNING: CPU: 0 PID: 19011 at fs/buffer.c:1118 mark_buffer_dirty+0x571/0x6d0 fs/buffer.c:1118
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 19011 Comm: syz-executor3 Not tainted 4.18.0-rc6-next-20180725+ #18
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
 ? add_ta