------------[ cut here ]------------
generic_make_request: Trying to write to read-only block-device nullb0 (partno 0)
WARNING: CPU: 1 PID: 27752 at block/blk-core.c:800 bio_check_ro block/blk-core.c:800 [inline]
WARNING: CPU: 1 PID: 27752 at block/blk-core.c:800 generic_make_request_checks+0x1c82/0x2190 block/blk-core.c:901
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 27752 Comm: syz-executor.1 Not tainted 5.4.0-syzkaller #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+0x197/0x210 lib/dump_stack.c:118
 panic+0x2e3/0x75c kernel/panic.c:221
 __warn.cold+0x2f/0x35 kernel/panic.c:582
 report_bug+0x289/0x300 lib/bug.c:195
 fixup_bug arch/x86/kernel/traps.c:179 [inline]
 fixup_bug arch/x86/kernel/traps.c:174 [inline]
 do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:272
 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:291
 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1028
RIP: 0010:bio_check_ro block/blk-core.c:800 [inline]
RIP: 0010:generic_make_request_checks+0x1c82/0x2190 block/blk-core.c:901
Code: 00 00 44 8b ab 3c 05 00 00 48 8d b5 78 ff ff ff 4c 89 ff e8 a0 91 05 00 48 c7 c7 c0 59 e5 87 48 89 c6 44 89 ea e8 16 90 12 fe <0f> 0b 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 80 3c 02
RSP: 0018:ffff8880554df4d0 EFLAGS: 00010282
RAX: 0000000000000000 RBX: ffff8880a3249000 RCX: 0000000000000000
RDX: 0000000000015332 RSI: ffffffff815db046 RDI: ffffed100aa9be8c
RBP: ffff8880554df5d0 R08: ffff888094b28140 R09: ffffed1015d26211
R10: ffffed1015d26210 R11: ffff8880ae931087 R12: ffff8880a9743808
R13: 0000000000000000 R14: 0000000000000001 R15: ffff8880a9743800
 generic_make_request+0x8f/0xb50 block/blk-core.c:1020
 submit_bio+0x113/0x600 block/blk-core.c:1192
 submit_bh_wbc+0x6b6/0x900 fs/buffer.c:3095
 __block_write_full_page+0x7fe/0x11b0 fs/buffer.c:1767
 block_write_full_page+0x21f/0x270 fs/buffer.c:2953
 blkdev_writepage+0x25/0x30 fs/block_dev.c:609
 __writepage+0x66/0x110 mm/page-writeback.c:2303
 write_cache_pages+0x80c/0x13f0 mm/page-writeback.c:2238
 generic_writepages mm/page-writeback.c:2329 [inline]
 generic_writepages+0xed/0x160 mm/page-writeback.c:2318
 blkdev_writepages+0x1e/0x30 fs/block_dev.c:2060
 do_writepages+0xfa/0x2a0 mm/page-writeback.c:2344
 __filemap_fdatawrite_range+0x2bc/0x3b0 mm/filemap.c:421
 file_write_and_wait_range+0x175/0x210 mm/filemap.c:782
 blkdev_fsync+0x6c/0xd0 fs/block_dev.c:666
 vfs_fsync_range+0x141/0x230 fs/sync.c:197
 vfs_fsync fs/sync.c:211 [inline]
 do_fsync+0x54/0xa0 fs/sync.c:221
 __do_sys_fdatasync fs/sync.c:234 [inline]
 __se_sys_fdatasync fs/sync.c:232 [inline]
 __x64_sys_fdatasync+0x36/0x50 fs/sync.c:232
 do_syscall_64+0xfa/0x760 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45a649
Code: ad b6 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 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f5b5fc4ec78 EFLAGS: 00000246 ORIG_RAX: 000000000000004b
RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 000000000045a649
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f5b5fc4f6d4
R13: 00000000004c114b R14: 00000000004d4050 R15: 00000000ffffffff
Kernel Offset: disabled
Rebooting in 86400 seconds..