------------[ cut here ]------------
Trying to write to read-only block-device nullb0 (partno 0)
WARNING: CPU: 1 PID: 8438 at block/blk-core.c:700 bio_check_ro block/blk-core.c:700 [inline]
WARNING: CPU: 1 PID: 8438 at block/blk-core.c:700 submit_bio_checks+0x160c/0x1a80 block/blk-core.c:813
Modules linked in:
CPU: 0 PID: 8438 Comm: syz-executor383 Not tainted 5.14.0-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:700 [inline]
RIP: 0010:submit_bio_checks+0x160c/0x1a80 block/blk-core.c:813
Code: 00 00 45 0f b6 a4 24 90 05 00 00 48 8d 74 24 60 48 89 ef e8 c6 47 fe ff 48 c7 c7 40 a0 e1 89 48 89 c6 44 89 e2 e8 92 fd 27 05 <0f> 0b e9 86 f3 ff ff e8 98 65 b5 fd e8 23 37 6a 05 31 ff 89 c3 89
RSP: 0018:ffffc9000164f5b8 EFLAGS: 00010282
RAX: 0000000000000000 RBX: ffff88814625b940 RCX: 0000000000000000
RDX: ffff88802ebb3880 RSI: ffffffff815d85b5 RDI: fffff520002c9ea9
RBP: ffff888026fdfb40 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff815d23ee R11: 0000000000000000 R12: 0000000000000000
R13: ffff888026fdfb50 R14: ffff8881464d3840 R15: ffff88814625beb4
FS:  00007f49f3c11700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000200000c0 CR3: 0000000016ed3000 CR4: 0000000000350ef0
Call Trace:
 submit_bio_noacct+0x81/0xf20 block/blk-core.c:1028
 __blk_queue_split+0x4b8/0x1550 block/blk-merge.c:349
 blk_mq_submit_bio+0x1ca/0x1860 block/blk-mq.c:2170
 __submit_bio_noacct_mq block/blk-core.c:1010 [inline]
 submit_bio_noacct block/blk-core.c:1043 [inline]
 submit_bio_noacct+0xad2/0xf20 block/blk-core.c:1026
 submit_bio+0x1ea/0x470 block/blk-core.c:1105
 blk_next_bio block/blk-lib.c:19 [inline]
 __blkdev_issue_zero_pages+0x14b/0x3b0 block/blk-lib.c:319
 blkdev_issue_zeroout+0x424/0x4b0 block/blk-lib.c:413
 blk_ioctl_zeroout block/ioctl.c:176 [inline]
 blkdev_common_ioctl+0xd0d/0x1830 block/ioctl.c:471
 blkdev_ioctl+0x1ef/0x6d0 block/ioctl.c:579
 block_ioctl+0xf9/0x140 fs/block_dev.c:1604
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:1069 [inline]
 __se_sys_ioctl fs/ioctl.c:1055 [inline]
 __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:1055
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4458c9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 11 15 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f49f3c11318 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000004ca428 RCX: 00000000004458c9
RDX: 0000000020000080 RSI: 000000000000127f RDI: 0000000000000003
RBP: 00000000004ca420 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 6c756e2f7665642f
R13: 00007ffcf7414ddf R14: 00007f49f3c11400 R15: 0000000000022000