loop0: detected capacity change from 0 to 2442
------------[ cut here ]------------
Trying to write to read-only block-device loop0 (partno 0)
WARNING: CPU: 1 PID: 8497 at block/blk-core.c:701 bio_check_ro block/blk-core.c:701 [inline]
WARNING: CPU: 1 PID: 8497 at block/blk-core.c:701 submit_bio_checks+0x160c/0x1a80 block/blk-core.c:814
Modules linked in:
CPU: 1 PID: 8497 Comm: syz-executor979 Tainted: G        W         5.14.0-rc1-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:701 [inline]
RIP: 0010:submit_bio_checks+0x160c/0x1a80 block/blk-core.c:814
Code: 00 00 45 0f b6 a4 24 50 05 00 00 48 8d 74 24 60 48 89 ef e8 76 47 fe ff 48 c7 c7 80 80 e1 89 48 89 c6 44 89 e2 e8 a5 a6 27 05 <0f> 0b e9 86 f3 ff ff e8 38 dd b5 fd e8 a3 e5 69 05 31 ff 89 c3 89
RSP: 0018:ffffc9000178f238 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffff888146770000 RCX: 0000000000000000
RDX: ffff88801b183880 RSI: ffffffff815d6855 RDI: fffff520002f1e39
RBP: ffff888026f5b8c0 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff815d068e R11: 0000000000000000 R12: 0000000000000000
R13: ffff888026f5b8d0 R14: ffff888019d7c200 R15: ffff888146770574
FS:  0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc1b5041000 CR3: 0000000026d93000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 submit_bio_noacct+0x81/0xf20 block/blk-core.c:1029
 submit_bio+0x1ea/0x470 block/blk-core.c:1106
 submit_bh_wbc+0x5eb/0x7f0 fs/buffer.c:3050
 __block_write_full_page+0x879/0x1360 fs/buffer.c:1805
 block_write_full_page+0x14d/0x190 fs/buffer.c:2976
 __writepage+0x60/0x180 mm/page-writeback.c:2314
 write_cache_pages+0x754/0x1190 mm/page-writeback.c:2249
 generic_writepages mm/page-writeback.c:2340 [inline]
 generic_writepages+0xe2/0x150 mm/page-writeback.c:2329
 do_writepages+0xec/0x290 mm/page-writeback.c:2355
 __filemap_fdatawrite_range+0x2a5/0x390 mm/filemap.c:413
 filemap_write_and_wait_range mm/filemap.c:686 [inline]
 filemap_write_and_wait_range+0x65/0x100 mm/filemap.c:680
 filemap_write_and_wait include/linux/fs.h:2897 [inline]
 __sync_blockdev fs/block_dev.c:526 [inline]
 sync_blockdev fs/block_dev.c:535 [inline]
 blkdev_put+0x7ff/0xae0 fs/block_dev.c:1530
 blkdev_close+0x8c/0xb0 fs/block_dev.c:1584
 __fput+0x288/0x920 fs/file_table.c:280
 task_work_run+0xdd/0x1a0 kernel/task_work.c:164
 exit_task_work include/linux/task_work.h:32 [inline]
 do_exit+0xbd4/0x2a60 kernel/exit.c:825
 do_group_exit+0x125/0x310 kernel/exit.c:922
 get_signal+0x47f/0x2160 kernel/signal.c:2808
 arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:865
 handle_signal_work kernel/entry/common.c:148 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
 exit_to_user_mode_prepare+0x17d/0x290 kernel/entry/common.c:209
 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
 syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:302
 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x44bb59
Code: Unable to access opcode bytes at RIP 0x44bb2f.
RSP: 002b:00007fd11d936308 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00000000004cc4e8 RCX: 000000000044bb59
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00000000004cc4e8
RBP: 00000000004cc4e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004cc4ec
R13: 65732f636f72702f R14: 6f6f6c2f7665642f R15: 0000000000022000