------------[ cut here ]------------
Trying to write to read-only block-device nullb0 (partno 0)
WARNING: CPU: 1 PID: 30695 at block/blk-core.c:590 bio_check_ro block/blk-core.c:590 [inline]
WARNING: CPU: 1 PID: 30695 at block/blk-core.c:590 submit_bio_checks+0x1700/0x1bf0 block/blk-core.c:703
Modules linked in:
CPU: 1 PID: 30695 Comm: syz-executor.4 Not tainted 5.17.0-rc2-next-20220204-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:590 [inline]
RIP: 0010:submit_bio_checks+0x1700/0x1bf0 block/blk-core.c:703
Code: 00 00 45 0f b6 a4 24 50 05 00 00 48 8d 74 24 60 48 89 ef e8 c2 2b fe ff 48 c7 c7 80 4b 04 8a 48 89 c6 44 89 e2 e8 6f 87 3d 05 <0f> 0b e9 a0 f3 ff ff e8 44 a0 a2 fd e8 cf 60 81 05 31 ff 89 c3 89
RSP: 0018:ffffc90013a7f110 EFLAGS: 00010286

RAX: 0000000000000000 RBX: ffff8881472edb40 RCX: 0000000000000000
RDX: ffff888021f057c0 RSI: ffffffff815fb548 RDI: fffff5200274fe14
RBP: ffff8880778d9780 R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff815f52fe R11: 0000000000000000 R12: 0000000000000000
R13: ffff8880778d9790 R14: ffff8881408ca280 R15: ffff8881472eddd4
FS:  0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9716dcd1b8 CR3: 000000007f7a7000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __submit_bio+0xaf/0x360 block/blk-core.c:802
 __submit_bio_noacct_mq block/blk-core.c:881 [inline]
 submit_bio_noacct block/blk-core.c:907 [inline]
 submit_bio_noacct+0x6c9/0x8a0 block/blk-core.c:896
 submit_bio block/blk-core.c:968 [inline]
 submit_bio+0x1ea/0x430 block/blk-core.c:926
 submit_bh_wbc+0x4e9/0x6b0 fs/buffer.c:3090
 __block_write_full_page+0x8ee/0x1e00 fs/buffer.c:1846
 block_write_full_page+0x14d/0x190 fs/buffer.c:3018
 __writepage+0x60/0x180 mm/page-writeback.c:2403
 write_cache_pages+0x79f/0x1a50 mm/page-writeback.c:2338
 generic_writepages mm/page-writeback.c:2429 [inline]
 generic_writepages+0xe2/0x150 mm/page-writeback.c:2418
 do_writepages+0x1ab/0x690 mm/page-writeback.c:2447
 filemap_fdatawrite_wbc mm/filemap.c:384 [inline]
 filemap_fdatawrite_wbc+0x143/0x1b0 mm/filemap.c:374
 __filemap_fdatawrite_range mm/filemap.c:417 [inline]
 filemap_write_and_wait_range mm/filemap.c:669 [inline]
 filemap_write_and_wait_range+0xe1/0x1a0 mm/filemap.c:663
 filemap_write_and_wait include/linux/fs.h:2795 [inline]
 sync_blockdev block/bdev.c:199 [inline]
 sync_blockdev block/bdev.c:195 [inline]
 blkdev_put+0x473/0x950 block/bdev.c:903
 blkdev_close+0x6a/0x80 block/fops.c:512
 __fput+0x286/0x9f0 fs/file_table.c:311
 task_work_run+0xdd/0x1a0 kernel/task_work.c:164
 exit_task_work include/linux/task_work.h:32 [inline]
 do_exit+0xafa/0x2aa0 kernel/exit.c:806
 do_group_exit+0xd2/0x2f0 kernel/exit.c:935
 get_signal+0x4b0/0x28c0 kernel/signal.c:2862
 arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:868
 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:207
 __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
 syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300
 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f922b9e7059
Code: Unable to access opcode bytes at RIP 0x7f922b9e702f.
RSP: 002b:00007f922a95c218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f922baf9f68 RCX: 00007f922b9e7059
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f922baf9f68
RBP: 00007f922baf9f60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f922baf9f6c
R13: 00007fffd79897ff R14: 00007f922a95c300 R15: 0000000000022000
 </TASK>