------------[ cut here ]------------
generic_make_request: Trying to write to read-only block-device loop0 (partno 0)
WARNING: CPU: 0 PID: 15573 at block/blk-core.c:855 bio_check_ro block/blk-core.c:852 [inline]
WARNING: CPU: 0 PID: 15573 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: 0 PID: 15573 Comm: syz-executor.4 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 e7 41 14 89 4c 89 f6 31 c0 e8 b1 6c bd fd <0f> 0b e9 29 fc ff ff e8 05 ac eb fd c6 05 d7 2a 00 06 01 48 c7 c7
RSP: 0018:ffffc90017ef72b0 EFLAGS: 00010246
RAX: bccbc7e5dc0be500 RBX: 0000000000000001 RCX: 0000000000040000
RDX: ffffc90012691000 RSI: 000000000000df38 RDI: 000000000000df39
RBP: ffffc90017ef7370 R08: ffffffff815dd349 R09: ffffed1015d062c0
R10: ffffed1015d062c0 R11: 0000000000000000 R12: ffff8880a6b548c8
R13: 1ffff11014d6a919 R14: ffffc90017ef7310 R15: ffff8880a1c895ac
 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
 file_write_and_wait_range+0xed/0x1a0 mm/filemap.c:760
 blkdev_fsync+0x67/0xc0 fs/block_dev.c:664
 generic_write_sync include/linux/fs.h:2882 [inline]
 blkdev_write_iter+0x352/0x3f0 fs/block_dev.c:2026
 do_iter_readv_writev+0x5b7/0x820 include/linux/fs.h:1902
 do_iter_write+0x16a/0x540 fs/read_write.c:1018
 iter_file_splice_write+0x6ca/0xdf0 fs/splice.c:750
 do_splice_from fs/splice.c:846 [inline]
 direct_splice_actor+0xfa/0x2a0 fs/splice.c:1016
 splice_direct_to_actor+0x4a2/0xb60 fs/splice.c:971
 do_splice_direct+0x201/0x340 fs/splice.c:1059
 do_sendfile+0x809/0xfe0 fs/read_write.c:1540
 __do_sys_sendfile64 fs/read_write.c:1601 [inline]
 __se_sys_sendfile64 fs/read_write.c:1587 [inline]
 __x64_sys_sendfile64+0x164/0x1a0 fs/read_write.c:1587
 do_syscall_64+0x73/0xe0 arch/x86/entry/common.c:384
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45c369
Code: Bad RIP value.
RSP: 002b:00007ffa63947c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 0000000000026240 RCX: 000000000045c369
RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000008
RBP: 000000000078bfe8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000024002e00 R11: 0000000000000246 R12: 000000000078bfac
R13: 00007fff29e6fbaf R14: 00007ffa639489c0 R15: 000000000078bfac
Kernel Offset: disabled
Rebooting in 86400 seconds..