------------[ cut here ]------------
generic_make_request: Trying to write to read-only block-device loop0 (partno 0)
WARNING: CPU: 1 PID: 20432 at block/blk-core.c:855 bio_check_ro block/blk-core.c:852 [inline]
WARNING: CPU: 1 PID: 20432 at block/blk-core.c:855 generic_make_request_checks+0x63f/0x17d0 block/blk-core.c:988
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 20432 Comm: systemd-udevd Not tainted 5.8.0-rc6-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+0x1f0/0x31e lib/dump_stack.c:118
 panic+0x264/0x7a0 kernel/panic.c:231
 __warn+0x227/0x250 kernel/panic.c:600
 report_bug+0x1b1/0x2e0 lib/bug.c:198
 handle_bug+0x42/0x80 arch/x86/kernel/traps.c:235
 exc_invalid_op+0x16/0x40 arch/x86/kernel/traps.c:255
 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:540
RIP: 0010:bio_check_ro block/blk-core.c:852 [inline]
RIP: 0010:generic_make_request_checks+0x63f/0x17d0 block/blk-core.c:988
Code: ac 05 00 00 4c 89 f8 48 c1 e8 03 8a 04 08 84 c0 0f 85 78 11 00 00 41 8b 17 48 c7 c7 a7 41 14 89 4c 89 f6 31 c0 e8 51 6f bd fd <0f> 0b e9 29 fc ff ff e8 a5 ae eb fd c6 05 77 2d 00 06 01 48 c7 c7
RSP: 0018:ffffc90017d27770 EFLAGS: 00010246
RAX: 267db789384f7c00 RBX: 0000000000000001 RCX: ffff88808506e100
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc90017d27830 R08: ffffffff815dd349 R09: ffffed1015d262c0
R10: ffffed1015d262c0 R11: 0000000000000000 R12: ffff888092d3f408
R13: 1ffff110125a7e81 R14: ffffc90017d277d0 R15: ffff8880a1c5b5ac
 generic_make_request+0x36/0xab0 block/blk-core.c:1112
 submit_bio+0x1a4/0x620 block/blk-core.c:1275
 __block_write_full_page+0x8bb/0x1000 fs/buffer.c:1811
 __writepage+0x60/0x110 mm/page-writeback.c:2313
 write_cache_pages+0x8bb/0xda0 mm/page-writeback.c:2248
 generic_writepages+0x8f/0xd0 mm/page-writeback.c:2339
 do_writepages+0xda/0x1f0 mm/page-writeback.c:2354
 __filemap_fdatawrite_range+0x2a5/0x350 mm/filemap.c:421
 filemap_write_and_wait_range+0xca/0x160 mm/filemap.c:654
 filemap_write_and_wait include/linux/fs.h:2765 [inline]
 __sync_blockdev fs/block_dev.c:490 [inline]
 sync_blockdev fs/block_dev.c:499 [inline]
 __blkdev_put+0x111/0x7a0 fs/block_dev.c:1886
 blkdev_close+0x7a/0xa0 fs/block_dev.c:1970
 __fput+0x2f0/0x750 fs/file_table.c:281
 task_work_run+0x137/0x1c0 kernel/task_work.c:135
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_usermode_loop arch/x86/entry/common.c:239 [inline]
 __prepare_exit_to_usermode+0x14c/0x1e0 arch/x86/entry/common.c:269
 do_syscall_64+0x7f/0xe0 arch/x86/entry/common.c:393
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7ff4436fb270
Code: Bad RIP value.
RSP: 002b:00007ffdf72b4778 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000007 RCX: 00007ff4436fb270
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000007
RBP: 00007ff4445b4710 R08: 0000562a0bf92930 R09: 0000562a0bf92700
R10: 00007ff4445b48c0 R11: 0000000000000246 R12: 0000000000000000
R13: 0000562a0bfa5cb0 R14: 0000000000000003 R15: 000000000000000e
Kernel Offset: disabled
Rebooting in 86400 seconds..