------------[ cut here ]------------
generic_make_request: Trying to write to read-only block-device nullb0 (partno 0)
WARNING: CPU: 0 PID: 359 at block/blk-core.c:2183 bio_check_ro block/blk-core.c:2183 [inline]
WARNING: CPU: 0 PID: 359 at block/blk-core.c:2183 generic_make_request_checks+0x17d9/0x22e0 block/blk-core.c:2288
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 359 Comm: syz-executor.3 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
 panic+0x26a/0x50e kernel/panic.c:186
 __warn.cold+0x20/0x5a kernel/panic.c:541
 report_bug+0x262/0x2b0 lib/bug.c:183
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 fixup_bug arch/x86/kernel/traps.c:173 [inline]
 do_error_trap+0x1d7/0x310 arch/x86/kernel/traps.c:296
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1038
RIP: 0010:bio_check_ro block/blk-core.c:2183 [inline]
RIP: 0010:generic_make_request_checks+0x17d9/0x22e0 block/blk-core.c:2288
Code: ca 0a 00 00 45 8b b6 1c 05 00 00 48 8d 74 24 68 48 89 ef e8 b9 14 06 00 48 c7 c7 00 29 b2 88 48 89 c6 44 89 f2 e8 4c 94 91 04 <0f> 0b 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 80 3c 02
RSP: 0018:ffff8880504e7070 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffff8880adc36040 RCX: 0000000000000000
RDX: 000000000003375a RSI: ffffffff814dff01 RDI: ffffed100a09ce00
RBP: ffff8880a9a94680 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000000 R12: ffff8880a9a946b0
R13: ffff8880a9a94688 R14: 0000000000000000 R15: 0000000000000000
 generic_make_request+0x23f/0xdf0 block/blk-core.c:2412
 submit_bio+0xb1/0x430 block/blk-core.c:2576
 submit_bh_wbc+0x5a7/0x760 fs/buffer.c:3090
 __block_write_full_page+0x71a/0xf60 fs/buffer.c:1777
 block_write_full_page+0x1f3/0x260 fs/buffer.c:2951
 __writepage+0x5e/0xe0 mm/page-writeback.c:2305
 write_cache_pages+0x802/0x12d0 mm/page-writeback.c:2240
 generic_writepages mm/page-writeback.c:2329 [inline]
 generic_writepages+0xdb/0x150 mm/page-writeback.c:2318
 do_writepages+0xe5/0x290 mm/page-writeback.c:2344
 __filemap_fdatawrite_range+0x27d/0x350 mm/filemap.c:446
 filemap_write_and_wait_range mm/filemap.c:679 [inline]
 filemap_write_and_wait_range+0x46/0xd0 mm/filemap.c:673
 generic_file_read_iter+0xdf7/0x2b60 mm/filemap.c:2355
 blkdev_read_iter+0x127/0x1c0 fs/block_dev.c:1971
 call_read_iter include/linux/fs.h:1815 [inline]
 generic_file_splice_read+0x44a/0x6d0 fs/splice.c:308
 do_splice_to+0x10e/0x160 fs/splice.c:881
 splice_direct_to_actor+0x2b9/0x8d0 fs/splice.c:959
 do_splice_direct+0x1a7/0x270 fs/splice.c:1068
 do_sendfile+0x550/0xc30 fs/read_write.c:1447
 __do_sys_sendfile64 fs/read_write.c:1508 [inline]
 __se_sys_sendfile64+0x147/0x160 fs/read_write.c:1494
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f1a4cfb00f9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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:00007f1a4b522168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f1a4d0cff80 RCX: 00007f1a4cfb00f9
RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000003
RBP: 00007f1a4d00bae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000100000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc12ee67df R14: 00007f1a4b522300 R15: 0000000000022000
Kernel Offset: disabled
Rebooting in 86400 seconds..