------------[ cut here ]------------
generic_make_request: Trying to write to read-only block-device loop0 (partno 0)
WARNING: CPU: 0 PID: 17249 at block/blk-core.c:852 bio_check_ro block/blk-core.c:852 [inline]
WARNING: CPU: 0 PID: 17249 at block/blk-core.c:852 generic_make_request_checks+0x1cb0/0x21c0 block/blk-core.c:988
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 17249 Comm: syz-executor.3 Not tainted 5.8.0-rc5-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+0x18f/0x20d lib/dump_stack.c:118
 panic+0x2e3/0x75c kernel/panic.c:231
 __warn.cold+0x20/0x45 kernel/panic.c:600
 report_bug+0x1bd/0x210 lib/bug.c:198
 handle_bug+0x38/0x90 arch/x86/kernel/traps.c:235
 exc_invalid_op+0x13/0x40 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+0x1cb0/0x21c0 block/blk-core.c:988
Code: 1a 05 00 00 44 8b ab ac 05 00 00 48 8d 74 24 70 48 89 ef e8 92 0f fe ff 48 c7 c7 a0 9b 91 88 48 89 c6 44 89 ea e8 72 7f c2 fd <0f> 0b 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 80 3c 02
RSP: 0018:ffffc900185d7470 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffff88809dfea000 RCX: 0000000000000000
RDX: ffff88805c444040 RSI: ffffffff815d4eb7 RDI: fffff520030bae80
RBP: ffff888057c66c80 R08: 0000000000000001 R09: ffff8880ae6318e7
R10: 0000000000000000 R11: 0000000000000000 R12: ffff888057c66c88
R13: 0000000000000000 R14: 0000000000000001 R15: ffff88809e76e000
 generic_make_request+0x89/0xc00 block/blk-core.c:1112
 submit_bio+0x263/0x5b0 block/blk-core.c:1275
 submit_bh_wbc+0x68d/0x8e0 fs/buffer.c:3073
 __block_write_full_page+0x837/0x12e0 fs/buffer.c:1811
 block_write_full_page+0x214/0x270 fs/buffer.c:2997
 __writepage+0x60/0x170 mm/page-writeback.c:2313
 write_cache_pages+0x736/0x11b0 mm/page-writeback.c:2248
 generic_writepages mm/page-writeback.c:2339 [inline]
 generic_writepages+0xe2/0x150 mm/page-writeback.c:2328
 do_writepages+0xec/0x290 mm/page-writeback.c:2354
 __filemap_fdatawrite_range+0x2a1/0x380 mm/filemap.c:421
 filemap_write_and_wait_range mm/filemap.c:654 [inline]
 filemap_write_and_wait_range+0xe1/0x1c0 mm/filemap.c:648
 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+0x69a/0x890 fs/block_dev.c:1886
 blkdev_close+0x8c/0xb0 fs/block_dev.c:1970
 __fput+0x33c/0x880 fs/file_table.c:281
 task_work_run+0xdd/0x190 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+0x1e9/0x1f0 arch/x86/entry/common.c:269
 __do_fast_syscall_32 arch/x86/entry/common.c:475 [inline]
 do_fast_syscall_32+0x7f/0x120 arch/x86/entry/common.c:503
 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
RIP: 0023:0xf7f3b569
Code: Bad RIP value.
RSP: 002b:00000000086afbec EFLAGS: 00000212 ORIG_RAX: 0000000000000006
RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000000000
RDX: 0000000000000006 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Kernel Offset: disabled
Rebooting in 86400 seconds..