IPVS: ftp: loaded support on port[0] = 21
EXT4-fs (loop0): warning: checktime reached, running e2fsck is recommended
EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue
------------[ cut here ]------------
generic_make_request: Trying to write to read-only block-device loop0 (partno 0)
WARNING: CPU: 1 PID: 8122 at block/blk-core.c:2182 bio_check_ro block/blk-core.c:2182 [inline]
WARNING: CPU: 1 PID: 8122 at block/blk-core.c:2182 generic_make_request_checks+0x17d9/0x22e0 block/blk-core.c:2287
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 8122 Comm: syz-executor725 Not tainted 4.19.163-syzkaller #0
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+0x1fc/0x2fe lib/dump_stack.c:118
 panic+0x26a/0x50e kernel/panic.c:186
 __warn.cold+0x20/0x61 kernel/panic.c:541
 report_bug+0x262/0x2b0 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+0x1d7/0x310 arch/x86/kernel/traps.c:296
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1038
RIP: 0010:bio_check_ro block/blk-core.c:2182 [inline]
RIP: 0010:generic_make_request_checks+0x17d9/0x22e0 block/blk-core.c:2287
Code: ca 0a 00 00 45 8b b6 e4 04 00 00 48 8d 74 24 68 48 89 ef e8 39 2c 06 00 48 c7 c7 e0 02 b2 88 48 89 c6 44 89 f2 e8 72 cd ce fd <0f> 0b 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 80 3c 02
RSP: 0018:ffff8880b13df800 EFLAGS: 00010282
RAX: 0000000000000000 RBX: ffff8880aef10000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff814fdbb1 RDI: ffffed101627bef2
RBP: ffff888097bf2500 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000000 R12: ffff888097bf2530
R13: ffff888097bf2508 R14: 0000000000000000 R15: 0000000000000000
 generic_make_request+0x23f/0xdf0 block/blk-core.c:2411
 submit_bio+0xb1/0x430 block/blk-core.c:2575
 submit_bh_wbc+0x5a7/0x760 fs/buffer.c:3090
 submit_bh fs/buffer.c:3096 [inline]
 __sync_dirty_buffer+0x14e/0x320 fs/buffer.c:3191
 ext4_commit_super+0x771/0xb70 fs/ext4/super.c:5020
 ext4_put_super+0x205/0x1010 fs/ext4/super.c:1003
 generic_shutdown_super+0x144/0x370 fs/super.c:456
 kill_block_super+0x97/0xf0 fs/super.c:1185
 deactivate_locked_super+0x94/0x160 fs/super.c:329
 deactivate_super+0x174/0x1a0 fs/super.c:360
 cleanup_mnt+0x1a8/0x290 fs/namespace.c:1098
 task_work_run+0x148/0x1c0 kernel/task_work.c:113
 exit_task_work include/linux/task_work.h:22 [inline]
 do_exit+0xbed/0x2be0 kernel/exit.c:890
 do_group_exit+0x125/0x310 kernel/exit.c:993
 __do_sys_exit_group kernel/exit.c:1004 [inline]
 __se_sys_exit_group kernel/exit.c:1002 [inline]
 __x64_sys_exit_group+0x3a/0x50 kernel/exit.c:1002
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x443818
Code: Bad RIP value.
RSP: 002b:00007ffdfd6ab1c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 0000000000443818
RDX: 0000000000000001 RSI: 000000000000003c RDI: 0000000000000001
RBP: 00000000004c3bd0 R08: 00000000000000e7 R09: ffffffffffffffd0
R10: 000000000000000f R11: 0000000000000246 R12: 0000000000000001
R13: 00000000006d6180 R14: 0000000000000000 R15: 0000000000000000
Kernel Offset: disabled
Rebooting in 86400 seconds..