generic_make_request: Trying to write to read-only block-device nullb0 (partno 0)
WARNING: CPU: 0 PID: 31451 at block/blk-core.c:797 bio_check_ro block/blk-core.c:797 [inline]
WARNING: CPU: 0 PID: 31451 at block/blk-core.c:797 generic_make_request_checks+0x1d5c/0x2210 block/blk-core.c:902
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 31451 Comm: syz-executor.5 Not tainted 5.4.0-rc8-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:797 [inline]
RIP: 0010:generic_make_request_checks+0x1d5c/0x2210 block/blk-core.c:902
Code: 00 00 44 8b ab 3c 05 00 00 48 8d b5 78 ff ff ff 4c 89 f7 e8 c6 87 05 00 48 c7 c7 60 18 e5 87 48 89 c6 44 89 ea e8 1c f9 13 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:ffff88803afc71c0 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffff8880a2d56000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff815cf7d6 RDI: ffffed10075f8e2a
RBP: ffff88803afc72c0 R08: ffff8880657c8400 R09: ffffed1015d06159
R10: ffffed1015d06158 R11: ffff8880ae830ac7 R12: ffff88809cc44288
R13: 0000000000000000 R14: ffff88809cc44280 R15: ffff8880a2eaa140
 generic_make_request+0x8f/0xb50 block/blk-core.c:1018
 submit_bio+0x113/0x600 block/blk-core.c:1190
 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:2031
 do_writepages+0xfa/0x2a0 mm/page-writeback.c:2344
 __filemap_fdatawrite_range+0x2bc/0x3b0 mm/filemap.c:421
 __filemap_fdatawrite mm/filemap.c:429 [inline]
 filemap_fdatawrite mm/filemap.c:434 [inline]
 filemap_write_and_wait mm/filemap.c:640 [inline]
 filemap_write_and_wait+0xf8/0x1e0 mm/filemap.c:635
 __sync_blockdev fs/block_dev.c:491 [inline]
 sync_blockdev fs/block_dev.c:500 [inline]
 __blkdev_put+0x204/0x810 fs/block_dev.c:1860
 blkdev_put+0x98/0x560 fs/block_dev.c:1929
 blkdev_close+0x8b/0xb0 fs/block_dev.c:1936
 __fput+0x2ff/0x890 fs/file_table.c:280
 ____fput+0x16/0x20 fs/file_table.c:313
 task_work_run+0x145/0x1c0 kernel/task_work.c:113
 exit_task_work include/linux/task_work.h:22 [inline]
 do_exit+0x904/0x2e60 kernel/exit.c:817
 do_group_exit+0x135/0x360 kernel/exit.c:921
 __do_sys_exit_group kernel/exit.c:932 [inline]
 __se_sys_exit_group kernel/exit.c:930 [inline]
 __x64_sys_exit_group+0x44/0x50 kernel/exit.c:930
 do_syscall_64+0xfa/0x760 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45a639
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:00007ffcb17d0118 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 000000000000000b RCX: 000000000045a639
RDX: 0000000000414111 RSI: 0000000000a770d0 RDI: 0000000000000000
RBP: 00000000004bff37 R08: 000000000000000c R09: 00007ffcb17d0220
R10: 0000000000d77940 R11: 0000000000000246 R12: 000000000075bfc8
R13: 0000000000000003 R14: 0000000000000001 R15: 000000000075bfd4
Kernel Offset: disabled
Rebooting in 86400 seconds..