------------[ cut here ]------------
Trying to write to read-only block-device nullb0 (partno 0)
WARNING: CPU: 1 PID: 21912 at block/blk-core.c:701 bio_check_ro block/blk-core.c:701 [inline]
WARNING: CPU: 1 PID: 21912 at block/blk-core.c:701 submit_bio_checks+0x968/0x1afc block/blk-core.c:814
Modules linked in:
CPU: 1 PID: 21912 Comm: syz-executor.1 Not tainted 5.13.0-syzkaller-13688-gde5540965853 #0
Hardware name: linux,dummy-virt (DT)
pstate: 60000005 (nZCv daif -PAN -UAO -TCO BTYPE=--)
pc : bio_check_ro block/blk-core.c:701 [inline]
pc : submit_bio_checks+0x968/0x1afc block/blk-core.c:814
lr : bio_check_ro block/blk-core.c:701 [inline]
lr : submit_bio_checks+0x968/0x1afc block/blk-core.c:814
sp : ffff800019d470f0
x29: ffff800019d470f0 x28: ffff00000b51f780 x27: ffff00000cd9c200
x26: ffff00000b51f788 x25: 1fffe000016a3ef1 x24: ffff000012a80000
x23: ffff00000cd9c200 x22: ffff800019d471c0 x21: ffff000012a80574
x20: ffff800014876ee0 x19: 1ffff000033a8e34 x18: ffff00006aa70bc8
x17: 0000000000000000 x16: 0000000000000000 x15: ffff00006aa70bfc
x14: 1ffff000033a8d5e x13: 0000000000000020 x12: ffff60000d54e194
x11: 1fffe0000d54e193 x10: ffff60000d54e193 x9 : dfff800000000000
x8 : ffff00006aa70c9b x7 : 0000000000000001 x6 : 00009ffff2ab1e6d
x5 : ffff00006aa70c98 x4 : 1fffe00001657349 x3 : dfff800000000000
x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff00000b2b9a40
Call trace:
 bio_check_ro block/blk-core.c:701 [inline]
 submit_bio_checks+0x968/0x1afc block/blk-core.c:814
 submit_bio_noacct+0x7c/0xa70 block/blk-core.c:1029
 submit_bio+0xd8/0x54c block/blk-core.c:1106
 submit_bh_wbc+0x388/0x524 fs/buffer.c:3050
 __block_write_full_page+0x4f4/0xcb0 fs/buffer.c:1805
 block_write_full_page+0x100/0x13c fs/buffer.c:2976
 blkdev_writepage+0x1c/0x30 fs/block_dev.c:639
 __writepage+0x58/0x164 mm/page-writeback.c:2314
 write_cache_pages+0x49c/0xcd0 mm/page-writeback.c:2249
 generic_writepages mm/page-writeback.c:2340 [inline]
 generic_writepages+0xd8/0x140 mm/page-writeback.c:2329
 blkdev_writepages+0x10/0x1c fs/block_dev.c:1677
 do_writepages+0xc8/0x220 mm/page-writeback.c:2355
 __filemap_fdatawrite_range+0x208/0x2bc mm/filemap.c:413
 filemap_write_and_wait_range mm/filemap.c:686 [inline]
 filemap_write_and_wait_range+0x54/0xd0 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+0x5b4/0x7a0 fs/block_dev.c:1530
 blkdev_close+0x80/0xd0 fs/block_dev.c:1584
 __fput+0x1a0/0x6b0 fs/file_table.c:280
 ____fput+0x10/0x20 fs/file_table.c:313
 task_work_run+0xd8/0x230 kernel/task_work.c:164
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 do_notify_resume+0x1380/0x26b0 arch/arm64/kernel/signal.c:952
 work_pending+0xc/0x438
irq event stamp: 3248
hardirqs last  enabled at (3247): [<ffff8000101e2158>] raw_spin_rq_unlock_irq kernel/sched/sched.h:1319 [inline]
hardirqs last  enabled at (3247): [<ffff8000101e2158>] finish_lock_switch kernel/sched/core.c:4437 [inline]
hardirqs last  enabled at (3247): [<ffff8000101e2158>] finish_task_switch.isra.0+0x1e8/0x7f0 kernel/sched/core.c:4555
hardirqs last disabled at (3248): [<ffff800014579574>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:296
softirqs last  enabled at (3202): [<ffff80001001a65c>] test_and_clear_bit include/asm-generic/bitops/atomic.h:51 [inline]
softirqs last  enabled at (3202): [<ffff80001001a65c>] test_and_clear_ti_thread_flag include/linux/thread_info.h:113 [inline]
softirqs last  enabled at (3202): [<ffff80001001a65c>] fpsimd_restore_current_state+0x3c/0x120 arch/arm64/kernel/fpsimd.c:1174
softirqs last disabled at (3200): [<ffff800010018d10>] get_cpu_fpsimd_context+0x0/0xa0 include/asm-generic/bitops/non-atomic.h:106
---[ end trace 05ed2556e7963bf9 ]---