loop0: detected capacity change from 0 to 512
EXT4-fs (loop0): warning: checktime reached, running e2fsck is recommended
EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none.
------------[ cut here ]------------
Trying to write to read-only block-device loop0 (partno 0)
WARNING: CPU: 1 PID: 8417 at block/blk-core.c:704 bio_check_ro block/blk-core.c:704 [inline]
WARNING: CPU: 1 PID: 8417 at block/blk-core.c:704 submit_bio_checks+0x165c/0x1aa0 block/blk-core.c:817
Modules linked in:
CPU: 1 PID: 8417 Comm: syz-executor921 Not tainted 5.13.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:bio_check_ro block/blk-core.c:704 [inline]
RIP: 0010:submit_bio_checks+0x165c/0x1aa0 block/blk-core.c:817
Code: 00 00 45 0f b6 a4 24 e0 05 00 00 48 8d 74 24 60 48 89 ef e8 76 42 fe ff 48 c7 c7 60 da c0 89 48 89 c6 44 89 e2 e8 e7 cf 1b 05 <0f> 0b e9 36 f3 ff ff e8 78 d3 bb fd 0f 0b e9 bf f1 ff ff e8 6c d3
RSP: 0018:ffffc90000eff8b0 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffff88801e250de0 RCX: 0000000000000000
RDX: ffff888029173880 RSI: ffffffff815cda35 RDI: fffff520001dff08
RBP: ffff888021b0f280 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff815c789e R11: 0000000000000000 R12: 0000000000000000
R13: ffff888021b0f290 R14: ffff88801a948b80 R15: ffff88801e2512e4
FS:  0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055bdc1c07160 CR3: 000000000bc8e000 CR4: 0000000000350ef0
Call Trace:
 submit_bio_noacct+0x81/0xf20 block/blk-core.c:1032
 submit_bio+0x263/0x5e0 block/blk-core.c:1118
 submit_bh_wbc+0x5eb/0x7f0 fs/buffer.c:3075
 submit_bh fs/buffer.c:3081 [inline]
 __sync_dirty_buffer+0x16d/0x3f0 fs/buffer.c:3176
 ext4_commit_super+0x2b0/0x520 fs/ext4/super.c:5611
 ext4_put_super+0xcac/0x10c0 fs/ext4/super.c:1196
 generic_shutdown_super+0x14c/0x370 fs/super.c:465
 kill_block_super+0x97/0xf0 fs/super.c:1395
 deactivate_locked_super+0x94/0x160 fs/super.c:335
 deactivate_super+0xad/0xd0 fs/super.c:366
 cleanup_mnt+0x3a2/0x540 fs/namespace.c:1136
 task_work_run+0xdd/0x1a0 kernel/task_work.c:164
 exit_task_work include/linux/task_work.h:32 [inline]
 do_exit+0xbfc/0x2a60 kernel/exit.c:826
 do_group_exit+0x125/0x310 kernel/exit.c:923
 __do_sys_exit_group kernel/exit.c:934 [inline]
 __se_sys_exit_group kernel/exit.c:932 [inline]
 __x64_sys_exit_group+0x3a/0x50 kernel/exit.c:932
 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x442f09
Code: Unable to access opcode bytes at RIP 0x442edf.
RSP: 002b:00007ffe2d781028 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00000000004b42f0 RCX: 0000000000442f09
RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001
RBP: 0000000000000001 R08: ffffffffffffffc0 R09: 00000000004af000
R10: 000000000000001f R11: 0000000000000246 R12: 00000000004b42f0
R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001