------------[ cut here ]------------ Trying to write to read-only block-device loop7 (partno 0) WARNING: CPU: 1 PID: 416 at block/blk-core.c:705 bio_check_ro block/blk-core.c:705 [inline] WARNING: CPU: 1 PID: 416 at block/blk-core.c:705 submit_bio_checks+0x1577/0x18d0 block/blk-core.c:833 Modules linked in: CPU: 1 PID: 416 Comm: syz-executor.7 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:ffff88803e347598 EFLAGS: 00010286 RAX: 0000000000000000 RBX: 1ffff11007c68eb9 RCX: 0000000000000000 RDX: ffff888008e3cbc0 RSI: ffffffff812930d3 RDI: ffffed1007c68ea5 RBP: ffff888017b26600 R08: 0000000000000001 R09: ffff88806cf2facf R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 R13: ffff88800d8ed470 R14: ffff888017b26610 R15: ffff888017b26608 FS: 0000000001dbf400(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffd5d9ddc88 CR3: 000000003e350000 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:00007ffd5d9de3c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 000000000000002e RCX: 0000000000467a67 RDX: 00007ffd5d9de49a RSI: 0000000000000002 RDI: 00007ffd5d9de490 RBP: 00007ffd5d9de490 R08: 00000000ffffffff R09: 00007ffd5d9de260 R10: 0000000001dc0b43 R11: 0000000000000246 R12: 00000000004bee70 R13: 00007ffd5d9df560 R14: 0000000001dc0b00 R15: 00007ffd5d9df5a0 irq event stamp: 202827 hardirqs last enabled at (202837): [] console_unlock+0x929/0xb30 kernel/printk/printk.c:2552 hardirqs last disabled at (202846): [] console_unlock+0x835/0xb30 kernel/printk/printk.c:2467 softirqs last enabled at (202662): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (202655): [] asm_call_irq_on_stack+0x12/0x20 ---[ end trace 0049fbfee813fa82 ]--- FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) sg_write: data in/out 196608/2 bytes for SCSI command 0x28-- guessing data in; program syz-executor.1 not setting count and/or reply_len properly sg_write: data in/out 196608/2 bytes for SCSI command 0x28-- guessing data in; program syz-executor.1 not setting count and/or reply_len properly sg_write: data in/out 196608/2 bytes for SCSI command 0x28-- guessing data in; program syz-executor.1 not setting count and/or reply_len properly netlink: 92 bytes leftover after parsing attributes in process `syz-executor.3'. FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) netlink: 92 bytes leftover after parsing attributes in process `syz-executor.3'. FAT-fs (loop5): Directory bread(block 72) failed FAT-fs (loop5): Directory bread(block 73) failed FAT-fs (loop5): Directory bread(block 74) failed FAT-fs (loop5): Directory bread(block 75) failed FAT-fs (loop5): Directory bread(block 76) failed FAT-fs (loop5): Directory bread(block 77) failed FAT-fs (loop5): Directory bread(block 78) failed FAT-fs (loop5): Directory bread(block 79) failed FAT-fs (loop5): Directory bread(block 80) failed FAT-fs (loop5): Directory bread(block 81) failed FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) syz-executor.2 (4513) used greatest stack depth: 23856 bytes left