------------[ cut here ]------------
Trying to write to read-only block-device nullb0 (partno 0)
WARNING: CPU: 1 PID: 54 at block/blk-core.c:584 bio_check_ro block/blk-core.c:584 [inline]
WARNING: CPU: 1 PID: 54 at block/blk-core.c:584 submit_bio_checks+0x1700/0x1bf0 block/blk-core.c:697
Modules linked in:
CPU: 1 PID: 54 Comm: kworker/u4:3 Not tainted 5.17.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: writeback wb_workfn (flush-250:0)
RIP: 0010:bio_check_ro block/blk-core.c:584 [inline]
RIP: 0010:submit_bio_checks+0x1700/0x1bf0 block/blk-core.c:697
Code: 00 00 45 0f b6 a4 24 50 05 00 00 48 8d 74 24 60 48 89 ef e8 f2 4a fe ff 48 c7 c7 40 a8 03 8a 48 89 c6 44 89 e2 e8 ef 7f 3f 05 <0f> 0b e9 a0 f3 ff ff e8 a4 9d af fd e8 2f ac 83 05 31 ff 89 c3 89
RSP: 0018:ffffc90001a37018 EFLAGS: 00010282
RAX: 0000000000000000 RBX: ffff88801b54d0e8 RCX: 0000000000000000
RDX: ffff888012be61c0 RSI: ffffffff815f15d8 RDI: fffff52000346df5
RBP: ffff88807451ac80 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff815ebc6e R11: 0000000000000000 R12: 0000000000000000
R13: ffff88807451ac90 R14: ffff88801731a400 R15: ffff88801b54d37c
FS:  0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000004621a000 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:796
 __submit_bio_noacct_mq block/blk-core.c:875 [inline]
 submit_bio_noacct block/blk-core.c:901 [inline]
 submit_bio_noacct+0x6c9/0x8a0 block/blk-core.c:890
 submit_bio block/blk-core.c:962 [inline]
 submit_bio+0x1ea/0x430 block/blk-core.c:920
 submit_bh_wbc+0x5e8/0x7e0 fs/buffer.c:3055
 __block_write_full_page+0x8bb/0x13a0 fs/buffer.c:1809
 block_write_full_page+0x14d/0x190 fs/buffer.c:2981
 __writepage+0x60/0x180 mm/page-writeback.c:2320
 write_cache_pages+0x6f4/0x10c0 mm/page-writeback.c:2255
 generic_writepages mm/page-writeback.c:2346 [inline]
 generic_writepages+0xe2/0x150 mm/page-writeback.c:2335
 do_writepages+0x1ab/0x690 mm/page-writeback.c:2364
 __writeback_single_inode+0x126/0x10d0 fs/fs-writeback.c:1618
 writeback_sb_inodes+0x53d/0xf30 fs/fs-writeback.c:1891
 __writeback_inodes_wb+0xc6/0x280 fs/fs-writeback.c:1961
 wb_writeback+0x7f8/0xc30 fs/fs-writeback.c:2066
 wb_check_old_data_flush fs/fs-writeback.c:2166 [inline]
 wb_do_writeback fs/fs-writeback.c:2219 [inline]
 wb_workfn+0x8cf/0x12d0 fs/fs-writeback.c:2248
 process_one_work+0x9ac/0x1650 kernel/workqueue.c:2307
 worker_thread+0x657/0x1110 kernel/workqueue.c:2454
 kthread+0x2e9/0x3a0 kernel/kthread.c:377
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>