------------[ cut here ]------------
generic_make_request: Trying to write to read-only block-device loop0 (partno 0)
WARNING: CPU: 1 PID: 8991 at block/blk-core.c:826 bio_check_ro block/blk-core.c:826 [inline]
WARNING: CPU: 1 PID: 8991 at block/blk-core.c:826 generic_make_request_checks+0x1d52/0x2200 block/blk-core.c:931
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 8991 Comm: syz-executor290 Not tainted 5.4.0-rc4-next-20191025 #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+0x172/0x1f0 lib/dump_stack.c:113
 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:174 [inline]
 fixup_bug arch/x86/kernel/traps.c:169 [inline]
 do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:267
 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:286
 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027
RIP: 0010:bio_check_ro block/blk-core.c:826 [inline]
RIP: 0010:generic_make_request_checks+0x1d52/0x2200 block/blk-core.c:931
Code: 00 00 44 8b ab 5c 05 00 00 48 8d b5 78 ff ff ff 4c 89 f7 e8 50 85 05 00 48 c7 c7 e0 4a e5 87 48 89 c6 44 89 ea e8 56 c8 12 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:ffff88808ae4f310 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffff8880a3aca000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff815d0de6 RDI: ffffed10115c9e54
RBP: ffff88808ae4f410 R08: ffff8880990ac300 R09: ffffed1015d26161
R10: ffffed1015d26160 R11: ffff8880ae930b07 R12: ffff8880a3933dc8
R13: 0000000000000000 R14: ffff8880a3933dc0 R15: ffff8880a3b2d0b8
 generic_make_request+0x8f/0xb50 block/blk-core.c:1047
 submit_bio+0x113/0x600 block/blk-core.c:1219
 submit_bh_wbc+0x6b6/0x900 fs/buffer.c:3132
 __block_write_full_page+0x7fe/0x11b0 fs/buffer.c:1804
 block_write_full_page+0x21f/0x270 fs/buffer.c:2990
 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
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_usermode_loop+0x316/0x380 arch/x86/entry/common.c:163
 prepare_exit_to_usermode arch/x86/entry/common.c:194 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:274 [inline]
 do_syscall_64+0x65f/0x760 arch/x86/entry/common.c:300
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4070a1
Code: 75 14 b8 03 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 24 1a 00 00 c3 48 83 ec 08 e8 6a fc ff ff 48 89 04 24 b8 03 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 b3 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01
RSP: 002b:00007ffec62e1440 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 00007ffec62e14a0 RCX: 00000000004070a1
RDX: fffffffffffffff7 RSI: 0000000000000000 RDI: 0000000000000007
RBP: 0000000000000008 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 00000000006ddc50
R13: 0000000000000064 R14: 000000000000000b R15: 00000000006ddc5c
Kernel Offset: disabled
Rebooting in 86400 seconds..