------------[ cut here ]------------
Trying to write to read-only block-device nullb0 (partno 0)
WARNING: CPU: 1 PID: 23549 at block/blk-core.c:705 bio_check_ro block/blk-core.c:705 [inline]
WARNING: CPU: 1 PID: 23549 at block/blk-core.c:705 submit_bio_checks+0x1acc/0x1fa0 block/blk-core.c:834
Modules linked in:
CPU: 1 PID: 23549 Comm: syz-executor.3 Not tainted 5.11.0-rc3-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:705 [inline]
RIP: 0010:submit_bio_checks+0x1acc/0x1fa0 block/blk-core.c:834
Code: 00 00 45 0f b6 a4 24 e0 05 00 00 48 8d 74 24 50 48 89 ef e8 06 39 fe ff 48 c7 c7 a0 74 9c 89 48 89 c6 44 89 e2 e8 68 e2 0f 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:ffffc900178d78d8 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffff8880126dc300 RCX: 0000000000000000
RDX: 0000000000040000 RSI: ffffffff815b6ba5 RDI: fffff52002f1af0d
RBP: ffff888019280040 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff815afd4e R11: 0000000000000000 R12: 0000000000000000
R13: 1ffff92002f1af21 R14: ffff888019280050 R15: ffff888019280048
FS:  00007fa9cbe4f700(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3d30a73000 CR3: 0000000022fdc000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 submit_bio_noacct+0x81/0xe10 block/blk-core.c:1046
 submit_bio+0x263/0x5a0 block/blk-core.c:1131
 blk_next_bio block/blk-lib.c:19 [inline]
 __blkdev_issue_zero_pages+0x179/0x460 block/blk-lib.c:318
 blkdev_issue_zeroout+0x418/0x4b0 block/blk-lib.c:412
 blk_ioctl_zeroout block/ioctl.c:167 [inline]
 blkdev_common_ioctl+0xcac/0x16a0 block/ioctl.c:462
 blkdev_ioctl+0x1ef/0x6c0 block/ioctl.c:570
 block_ioctl+0xf9/0x140 fs/block_dev.c:1650
 vfs_ioctl fs/ioctl.c:48 [inline]
 __do_sys_ioctl fs/ioctl.c:753 [inline]
 __se_sys_ioctl fs/ioctl.c:739 [inline]
 __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:739
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45e219
Code: 0d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 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 0f 83 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fa9cbe4ec68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045e219
RDX: 0000000020000040 RSI: 000000000000127f RDI: 0000000000000003
RBP: 000000000119bfc0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119bf8c
R13: 00007ffd453d4b4f R14: 00007fa9cbe4f9c0 R15: 000000000119bf8c