------------[ cut here ]------------
generic_make_request: Trying to write to read-only block-device nullb0 (partno 0)
WARNING: CPU: 0 PID: 27744 at block/blk-core.c:789 bio_check_ro block/blk-core.c:789 [inline]
WARNING: CPU: 0 PID: 27744 at block/blk-core.c:789 generic_make_request_checks+0x103d/0x10e0 block/blk-core.c:894
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 27744 Comm: syz-executor.1 Not tainted 5.3.0+ #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0xf5/0x159 lib/dump_stack.c:113
 panic+0x209/0x639 kernel/panic.c:219
 __warn.cold+0x4c/0x4d kernel/panic.c:576
 report_bug+0x1cf/0x1e0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:179 [inline]
 fixup_bug arch/x86/kernel/traps.c:174 [inline]
 do_error_trap+0xda/0x140 arch/x86/kernel/traps.c:272
 do_invalid_op+0x43/0x60 arch/x86/kernel/traps.c:291
 invalid_op+0x1e/0x30 arch/x86/entry/entry_64.S:1028
RIP: 0010:bio_check_ro block/blk-core.c:789 [inline]
RIP: 0010:generic_make_request_checks+0x103d/0x10e0 block/blk-core.c:894
Code: e8 58 f5 11 ff 45 8b bf 4c 03 00 00 48 8d 75 b0 4c 89 e7 e8 a5 3f 03 00 48 c7 c7 28 b6 66 85 48 89 c6 44 89 fa e8 8b 1a ed fe <0f> 0b 4c 89 f7 e8 99 f5 11 ff 48 8b 7d a0 4d 8b 7c 24 08 e8 1b f5
RSP: 0018:ffffc900010a3410 EFLAGS: 00010282
RAX: 0000000000000000 RBX: ffff888129fe8440 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff81388b4d RDI: 0000000000000005
RBP: ffffc900010a34a0 R08: ffff8880ac561100 R09: 0000000000000000
R10: ffff888097462368 R11: 0000000000000000 R12: ffff88809aefc840
R13: ffff88809aefc850 R14: ffff88809aefc848 R15: 0000000000000000
 generic_make_request+0x3e/0x740 block/blk-core.c:1006
 submit_bio+0x92/0x310 block/blk-core.c:1163
 submit_bh_wbc+0x40f/0x460 fs/buffer.c:3095
 __block_write_full_page+0x4e9/0x860 fs/buffer.c:1767
 block_write_full_page+0x1c0/0x1e0 fs/buffer.c:2953
 blkdev_writepage+0x2e/0x40 fs/block_dev.c:609
 __writepage+0x40/0xb0 mm/page-writeback.c:2301
 write_cache_pages+0x46b/0xb30 mm/page-writeback.c:2236
 generic_writepages mm/page-writeback.c:2327 [inline]
 generic_writepages+0x79/0xc0 mm/page-writeback.c:2316
 blkdev_writepages+0x27/0x40 fs/block_dev.c:2028
 do_writepages+0x6b/0x170 mm/page-writeback.c:2342
 __filemap_fdatawrite_range+0x19e/0x200 mm/filemap.c:415
 __filemap_fdatawrite mm/filemap.c:423 [inline]
 filemap_fdatawrite mm/filemap.c:428 [inline]
 filemap_write_and_wait mm/filemap.c:631 [inline]
 filemap_write_and_wait+0x50/0xd0 mm/filemap.c:626
 __sync_blockdev fs/block_dev.c:491 [inline]
 sync_blockdev fs/block_dev.c:500 [inline]
 __blkdev_put+0x12b/0x420 fs/block_dev.c:1860
 blkdev_put+0x89/0x2f0 fs/block_dev.c:1929
 blkdev_close+0x52/0x60 fs/block_dev.c:1936
 __fput+0x1e1/0x520 fs/file_table.c:280
 ____fput+0x1f/0x30 fs/file_table.c:313
 task_work_run+0xf6/0x130 kernel/task_work.c:113
 exit_task_work include/linux/task_work.h:22 [inline]
 do_exit+0x586/0x18e0 kernel/exit.c:879
 do_group_exit+0xb4/0x1c0 kernel/exit.c:983
 get_signal+0x2a2/0x1320 kernel/signal.c:2734
 do_signal+0x3b/0xc00 arch/x86/kernel/signal.c:815
 exit_to_usermode_loop+0x250/0x2c0 arch/x86/entry/common.c:159
 prepare_exit_to_usermode arch/x86/entry/common.c:194 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:274 [inline]
 do_syscall_64+0x2d7/0x2f0 arch/x86/entry/common.c:299
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x459a29
Code: Bad RIP value.
RSP: 002b:00007f937cf31cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 000000000075c078 RCX: 0000000000459a29
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000075c078
RBP: 000000000075c070 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000075c07c
R13: 00007ffc6c88558f R14: 00007f937cf329c0 R15: 000000000075c07c
Kernel Offset: disabled
Rebooting in 86400 seconds..