Trying to write to read-only block-device loop1 (partno 0) WARNING: CPU: 1 PID: 411 at block/blk-core.c:705 bio_check_ro block/blk-core.c:705 [inline] WARNING: CPU: 1 PID: 411 at block/blk-core.c:705 submit_bio_checks+0x1577/0x18d0 block/blk-core.c:833 Modules linked in: CPU: 1 PID: 411 Comm: syz-executor.1 Not tainted 5.10.56 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014 RIP: 0010:bio_check_ro block/blk-core.c:705 [inline] RIP: 0010:submit_bio_checks+0x1577/0x18d0 block/blk-core.c:833 Code: 03 00 00 45 8b a4 24 64 05 00 00 48 89 ef 48 8d 74 24 50 e8 6b 36 fe ff 48 c7 c7 a0 51 3a 84 48 89 c6 44 89 e2 e8 18 ca d3 01 <0f> 0b 48 b8 00 00 00 00 00 fc ff df 4c 89 fa 48 c1 ea 03 80 3c 02 RSP: 0018:ffff88804396f598 EFLAGS: 00010286 RAX: 0000000000000000 RBX: 1ffff1100872deb9 RCX: 0000000000000000 RDX: ffff8880158c9940 RSI: ffffffff812930d3 RDI: ffffed100872dea5 RBP: ffff888017508900 R08: 0000000000000001 R09: ffff88806cf2facf R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 R13: ffff88800d658c10 R14: ffff888017508910 R15: ffff888017508908 FS: 0000000002fa3400(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000002facb38 CR3: 0000000043970000 CR4: 0000000000350ee0 Call Trace: submit_bio_noacct+0x7a/0xce0 block/blk-core.c:1045 submit_bio+0xf3/0x4e0 block/blk-core.c:1130 submit_bh_wbc.constprop.0+0x580/0x770 fs/buffer.c:3054 __block_write_full_page+0x7d3/0x1050 fs/buffer.c:1810 block_write_full_page+0x21c/0x290 fs/buffer.c:2980 __writepage+0x67/0x180 mm/page-writeback.c:2311 write_cache_pages+0x57f/0xef0 mm/page-writeback.c:2246 generic_writepages mm/page-writeback.c:2337 [inline] generic_writepages+0xe2/0x150 mm/page-writeback.c:2326 do_writepages+0xee/0x290 mm/page-writeback.c:2352 __filemap_fdatawrite_range mm/filemap.c:422 [inline] __filemap_fdatawrite mm/filemap.c:430 [inline] filemap_flush+0x235/0x2e0 mm/filemap.c:457 __sync_blockdev fs/block_dev.c:529 [inline] __sync_blockdev+0xa1/0xe0 fs/block_dev.c:524 __sync_filesystem fs/sync.c:40 [inline] sync_filesystem fs/sync.c:64 [inline] sync_filesystem+0x13d/0x270 fs/sync.c:48 generic_shutdown_super+0x70/0x370 fs/super.c:448 kill_block_super+0x9d/0xf0 fs/super.c:1446 deactivate_locked_super+0x99/0x160 fs/super.c:335 deactivate_super+0xad/0xd0 fs/super.c:366 cleanup_mnt+0x396/0x500 fs/namespace.c:1118 task_work_run+0xe2/0x1a0 kernel/task_work.c:151 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop kernel/entry/common.c:164 [inline] exit_to_user_mode_prepare+0x155/0x160 kernel/entry/common.c:191 syscall_exit_to_user_mode+0x38/0x230 kernel/entry/common.c:266 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x467a67 Code: ff d0 48 89 c7 b8 3c 00 00 00 0f 05 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffc6127fe98 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 000000000000012d RCX: 0000000000467a67 RDX: 00007ffc6127ff6b RSI: 0000000000000002 RDI: 00007ffc6127ff60 RBP: 00007ffc6127ff60 R08: 00000000ffffffff R09: 00007ffc6127fd30 R10: 0000000002fa4b43 R11: 0000000000000246 R12: 00000000004bee70 R13: 00007ffc61281030 R14: 0000000002fa4b00 R15: 00007ffc61281070 irq event stamp: 894251 hardirqs last enabled at (894261): [] console_unlock+0x929/0xb30 kernel/printk/printk.c:2552 hardirqs last disabled at (894270): [] console_unlock+0x835/0xb30 kernel/printk/printk.c:2467 softirqs last enabled at (893694): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (893681): [] asm_call_irq_on_stack+0x12/0x20 ---[ end trace b4726bde2caec51b ]--- EXT4-fs (loop4): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop7): feature flags set on rev 0 fs, running e2fsck is recommended EXT4-fs (loop7): Can't read superblock on 2nd try EXT4-fs (loop4): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop7): feature flags set on rev 0 fs, running e2fsck is recommended EXT4-fs (loop7): Can't read superblock on 2nd try EXT4-fs (loop4): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop1): mounted filesystem without journal. Opts: ,errors=continue ISOFS: Unable to identify CD-ROM format. ISOFS: Unable to identify CD-ROM format. ISOFS: Unable to identify CD-ROM format. EXT4-fs (sda): re-mounted. Opts: noblock_validity,,errors=continue EXT4-fs (sda): re-mounted. Opts: noblock_validity,,errors=continue ISOFS: Unable to identify CD-ROM format. EXT4-fs warning (device sda): verify_group_input:131: Cannot add at group 0 (only 16 groups) cgroup: Unknown subsys name 'perf_event' cgroup: Unknown subsys name 'net_cls' EXT4-fs warning (device sda): verify_group_input:131: Cannot add at group 0 (only 16 groups) EXT4-fs (sda): re-mounted. Opts: noblock_validity,,errors=continue ISOFS: Unable to identify CD-ROM format. EXT4-fs warning (device sda): verify_group_input:131: Cannot add at group 0 (only 16 groups) EXT4-fs (sda): re-mounted. Opts: noblock_validity,,errors=continue EXT4-fs warning (device sda): verify_group_input:131: Cannot add at group 0 (only 16 groups) EXT4-fs (sda): re-mounted. Opts: noblock_validity,,errors=continue udc-core: couldn't find an available UDC or it's busy misc raw-gadget: fail, usb_gadget_probe_driver returned -19