------------[ cut here ]------------
generic_make_request: Trying to write to read-only block-device loop0 (partno 0)
WARNING: CPU: 0 PID: 14159 at block/blk-core.c:852 bio_check_ro block/blk-core.c:852 [inline]
WARNING: CPU: 0 PID: 14159 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: 14159 Comm: syz-executor.3 Not tainted 5.8.0-rc7-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 52 77 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:ffffc90009fb75c8 EFLAGS: 00010282
RAX: 0000000000000000 RBX: ffff8880a1ace000 RCX: 0000000000000000
RDX: 0000000000040000 RSI: ffffffff815d4ef7 RDI: fffff520013f6eab
RBP: ffff888097391840 R08: 0000000000000001 R09: ffff8880ae6318e7
R10: 0000000000000000 R11: 0000000000000000 R12: ffff888097391848
R13: 0000000000000000 R14: 0000000000000001 R15: ffff8880a1ac4040
 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
 file_write_and_wait_range+0x169/0x200 mm/filemap.c:760
 blkdev_fsync+0x67/0xd0 fs/block_dev.c:664
 vfs_fsync_range+0x13a/0x220 fs/sync.c:200
 vfs_fsync fs/sync.c:214 [inline]
 do_fsync fs/sync.c:224 [inline]
 __do_sys_fsync fs/sync.c:232 [inline]
 __se_sys_fsync fs/sync.c:230 [inline]
 __x64_sys_fsync+0x6b/0xc0 fs/sync.c:230
 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:384
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45c369
Code: 8d 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 5b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f4468b95c78 EFLAGS: 00000246 ORIG_RAX: 000000000000004a
RAX: ffffffffffffffda RBX: 0000000000003cc0 RCX: 000000000045c369
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 000000000078bf30 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000078bf0c
R13: 00007ffe9c26ef1f R14: 00007f4468b969c0 R15: 000000000078bf0c
Kernel Offset: disabled
Rebooting in 86400 seconds..