------------[ cut here ]------------
generic_make_request: Trying to write to read-only block-device loop7 (partno 0)
WARNING: CPU: 0 PID: 4565 at block/blk-core.c:852 bio_check_ro block/blk-core.c:852 [inline]
WARNING: CPU: 0 PID: 4565 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: 4565 Comm: syz-executor.0 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:ffffc90018e3f110 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffff8880a14f4000 RCX: 0000000000000000
RDX: 0000000000040000 RSI: ffffffff815d4ef7 RDI: fffff520031c7e14
RBP: ffff888027410040 R08: 0000000000000001 R09: ffff8880ae6318e7
R10: 0000000000000000 R11: 0000000000000000 R12: ffff888027410048
R13: 0000000000000000 R14: 0000000000000001 R15: ffff8880a14e9080
 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]
 set_blocksize+0x1d9/0x3f0 fs/block_dev.c:132
 loop_configure+0xb45/0x12f0 drivers/block/loop.c:1167
 lo_ioctl+0x3f7/0x16b0 drivers/block/loop.c:1685
 lo_compat_ioctl+0xb1/0x104 drivers/block/loop.c:1873
 compat_blkdev_ioctl+0x3e2/0x8c0 block/ioctl.c:691
 __do_compat_sys_ioctl+0x1d3/0x230 fs/ioctl.c:847
 do_syscall_32_irqs_on+0x3f/0x60 arch/x86/entry/common.c:428
 __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: 0023:0xf7faa569
Code: 10 05 03 74 b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 002b:00000000f5d840cc EFLAGS: 00000296 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000004c00
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..