------------[ cut here ]------------
generic_make_request: Trying to write to read-only block-device nullb0 (partno 0)
WARNING: CPU: 1 PID: 8650 at block/blk-core.c:789 bio_check_ro block/blk-core.c:789 [inline]
WARNING: CPU: 1 PID: 8650 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: 1 PID: 8650 Comm: syz-executor.4 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: 0000:ffffc90000f47530 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffff888129a614d0 RCX: ffffc9001078c000
RDX: 0000000000040000 RSI: ffffffff81388b4d RDI: 0000000000000005
RBP: ffffc90000f475c0 R08: ffff888099d57040 R09: ffffc90000f4730f
R10: 0000000030353638 R11: 0000000035363854 R12: ffff888099e47240
R13: ffff888099e47250 R14: ffff888099e47248 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_write_and_wait_range mm/filemap.c:672 [inline]
 filemap_write_and_wait_range+0x54/0xd0 mm/filemap.c:666
 generic_file_read_iter+0x1015/0x1440 mm/filemap.c:2314
 blkdev_read_iter+0xb2/0xe0 fs/block_dev.c:2007
 call_read_iter include/linux/fs.h:1864 [inline]
 do_iter_readv_writev+0x54b/0x5b0 fs/read_write.c:691
 do_iter_read+0x1fc/0x3d0 fs/read_write.c:933
 vfs_readv+0x9c/0xf0 fs/read_write.c:997
 do_preadv+0x131/0x1d0 fs/read_write.c:1089
 __do_sys_preadv fs/read_write.c:1139 [inline]
 __se_sys_preadv fs/read_write.c:1134 [inline]
 __x64_sys_preadv+0x61/0x80 fs/read_write.c:1134
 do_syscall_64+0xcf/0x2f0 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x459a29
Code: fd b7 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 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f23bdba5c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000127
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000459a29
RDX: 0000000000000001 RSI: 0000000020000040 RDI: 0000000000000006
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f23bdba66d4
R13: 00000000004c6f38 R14: 00000000004dc640 R15: 00000000ffffffff
Kernel Offset: disabled
Rebooting in 86400 seconds..