------------[ cut here ]------------
Trying to write to read-only block-device loop0 (partno 0)
WARNING: CPU: 1 PID: 8517 at block/blk-core.c:704 bio_check_ro block/blk-core.c:704 [inline]
WARNING: CPU: 1 PID: 8517 at block/blk-core.c:704 submit_bio_checks+0x1ac3/0x1f70 block/blk-core.c:832
Modules linked in:
CPU: 1 PID: 8517 Comm: syz-executor486 Not tainted 5.10.0-rc7-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+0x1ac3/0x1f70 block/blk-core.c:832
Code: 0f 85 50 04 00 00 8b 9b 6c 05 00 00 48 8d 74 24 58 48 89 ef e8 4e 0d fe ff 48 c7 c7 80 87 9b 89 48 89 c6 89 da e8 b9 ce 0b 05 <0f> 0b 48 b8 00 00 00 00 00 fc ff df 4c 89 fa 48 c1 ea 03 80 3c 02
RSP: 0018:ffffc9000169f118 EFLAGS: 00010282
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff888020e1cec0 RSI: ffffffff8158c835 RDI: fffff520002d3e15
RBP: ffff88801170f140 R08: 0000000000000001 R09: ffff8880b9f2011b
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880186ce120
R13: 1ffff920002d3e2a R14: ffff88801170f150 R15: ffff88801170f148
FS:  0000000000000000(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005580b2707fc0 CR3: 000000002c60f000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 submit_bio_noacct+0x81/0xe30 block/blk-core.c:1044
 submit_bio+0x263/0x5b0 block/blk-core.c:1129
 submit_bh_wbc+0x685/0x8e0 fs/buffer.c:3054
 __block_write_full_page+0x837/0x12f0 fs/buffer.c:1810
 block_write_full_page+0x205/0x260 fs/buffer.c:2980
 __writepage+0x60/0x180 mm/page-writeback.c:2311
 write_cache_pages+0x754/0x1190 mm/page-writeback.c:2246
 generic_writepages mm/page-writeback.c:2337 [inline]
 generic_writepages+0xe2/0x150 mm/page-writeback.c:2326
 do_writepages+0xec/0x290 mm/page-writeback.c:2352
 __filemap_fdatawrite_range+0x2a1/0x380 mm/filemap.c:422
 filemap_write_and_wait_range mm/filemap.c:655 [inline]
 filemap_write_and_wait_range+0xe1/0x1c0 mm/filemap.c:649
 filemap_write_and_wait include/linux/fs.h:2649 [inline]
 __sync_blockdev fs/block_dev.c:509 [inline]
 sync_blockdev fs/block_dev.c:518 [inline]
 __blkdev_put+0x69a/0x890 fs/block_dev.c:1767
 blkdev_close+0x8c/0xb0 fs/block_dev.c:1851
 __fput+0x285/0x920 fs/file_table.c:281
 task_work_run+0xdd/0x190 kernel/task_work.c:151
 exit_task_work include/linux/task_work.h:30 [inline]
 do_exit+0xb64/0x29b0 kernel/exit.c:809
 do_group_exit+0x125/0x310 kernel/exit.c:906
 get_signal+0x42a/0x1f10 kernel/signal.c:2758
 arch_do_signal+0x82/0x2390 arch/x86/kernel/signal.c:811
 exit_to_user_mode_loop kernel/entry/common.c:161 [inline]
 exit_to_user_mode_prepare+0x100/0x1a0 kernel/entry/common.c:191
 syscall_exit_to_user_mode+0x38/0x260 kernel/entry/common.c:266
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x44a759
Code: Unable to access opcode bytes at RIP 0x44a72f.
RSP: 002b:00007f4ef8b52d98 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00000000006dcc48 RCX: 000000000044a759
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00000000006dcc48
RBP: 00000000006dcc40 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dcc4c
R13: 3de76bbc993b2572 R14: c301ad5d89e03611 R15: 2cb1db97edb102bb