FAT-fs (loop6): Unrecognized mount option " I4*" or missing value ------------[ cut here ]------------ Trying to write to read-only block-device loop5 (partno 0) WARNING: CPU: 1 PID: 9606 at block/blk-core.c:705 bio_check_ro block/blk-core.c:705 [inline] WARNING: CPU: 1 PID: 9606 at block/blk-core.c:705 submit_bio_checks+0x1577/0x18d0 block/blk-core.c:833 Modules linked in: CPU: 1 PID: 9606 Comm: syz-executor.5 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:ffff888041abf2b0 EFLAGS: 00010286 RAX: 0000000000000000 RBX: 1ffff11008357e5c RCX: 0000000000000000 RDX: 0000000000040000 RSI: ffffffff812930d3 RDI: ffffed1008357e48 RBP: ffff888045128000 R08: 0000000000000001 R09: ffff88806cf2facf R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 R13: ffff88800cbb3c50 R14: ffff888045128010 R15: ffff888045128008 FS: 00007faa8af67700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f377abb4718 CR3: 000000004d09a000 CR4: 0000000000350ee0 Call Trace: submit_bio_noacct+0x7a/0xce0 block/blk-core.c:1045 submit_bio+0xf3/0x4e0 block/blk-core.c:1130 mpage_bio_submit fs/mpage.c:66 [inline] __mpage_writepage+0x104a/0x1680 fs/mpage.c:647 write_cache_pages+0x57f/0xef0 mm/page-writeback.c:2246 mpage_writepages+0xd8/0x230 fs/mpage.c:714 do_writepages+0xee/0x290 mm/page-writeback.c:2352 __filemap_fdatawrite_range+0x247/0x2f0 mm/filemap.c:422 filemap_write_and_wait_range mm/filemap.c:655 [inline] filemap_write_and_wait_range+0x65/0x100 mm/filemap.c:649 __generic_file_write_iter+0x2ff/0x5d0 mm/filemap.c:3448 generic_file_write_iter+0xd7/0x220 mm/filemap.c:3494 call_write_iter include/linux/fs.h:1903 [inline] new_sync_write+0x42c/0x660 fs/read_write.c:518 vfs_write+0x743/0xa20 fs/read_write.c:605 ksys_write+0x12d/0x250 fs/read_write.c:658 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x466609 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007faa8af67188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 0000000000466609 RDX: 0000000000000078 RSI: 0000000020000540 RDI: 0000000000000004 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffcd3bf93bf R14: 00007faa8af67300 R15: 0000000000022000 irq event stamp: 3047 hardirqs last enabled at (3055): [] console_unlock+0x929/0xb30 kernel/printk/printk.c:2552 hardirqs last disabled at (3064): [] console_unlock+0x835/0xb30 kernel/printk/printk.c:2467 softirqs last enabled at (2342): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (2337): [] asm_call_irq_on_stack+0x12/0x20 ---[ end trace cc11170ce9578ce7 ]---