------------[ cut here ]------------
Trying to write to read-only block-device loop7 (partno 0)
WARNING: CPU: 1 PID: 4463 at block/blk-core.c:705 bio_check_ro block/blk-core.c:705 [inline]
WARNING: CPU: 1 PID: 4463 at block/blk-core.c:705 submit_bio_checks+0x1577/0x18d0 block/blk-core.c:833
Modules linked in:
CPU: 1 PID: 4463 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:ffff8880467577e8 EFLAGS: 00010282
RAX: 0000000000000000 RBX: 1ffff11008ceaf03 RCX: 0000000000000000
RDX: 0000000000040000 RSI: ffffffff812930d3 RDI: ffffed1008ceaeef
RBP: ffff88800f729600 R08: 0000000000000001 R09: ffff88806cf2facf
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: ffff88800d94d470 R14: ffff88800f729610 R15: ffff88800f729608
FS:  00007fd2fcfd1700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000400000 CR3: 0000000022038000 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
 submit_bh fs/buffer.c:3060 [inline]
 __sync_dirty_buffer+0x16a/0x3f0 fs/buffer.c:3155
 fat_set_state+0x22b/0x310 fs/fat/inode.c:708
 fat_fill_super+0x22a2/0x36e0 fs/fat/inode.c:1884
 mount_bdev+0x331/0x3f0 fs/super.c:1419
 legacy_get_tree+0x105/0x220 fs/fs_context.c:592
 vfs_get_tree+0x8e/0x2f0 fs/super.c:1549
 do_new_mount fs/namespace.c:2881 [inline]
 path_mount+0x139a/0x2080 fs/namespace.c:3211
 do_mount fs/namespace.c:3224 [inline]
 __do_sys_mount fs/namespace.c:3432 [inline]
 __se_sys_mount fs/namespace.c:3409 [inline]
 __x64_sys_mount+0x27e/0x300 fs/namespace.c:3409
 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x467b2a
Code: 48 c7 c2 bc ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 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:00007fd2fcfd0fa8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 0000000000467b2a
RDX: 0000000020000080 RSI: 0000000020000100 RDI: 00007fd2fcfd1000
RBP: 00007fd2fcfd1040 R08: 00007fd2fcfd1040 R09: 0000000020000080
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000080
R13: 0000000020000100 R14: 00007fd2fcfd1000 R15: 00000000200000c0
irq event stamp: 1567
hardirqs last  enabled at (1577): [<ffffffff8128f659>] console_unlock+0x929/0xb30 kernel/printk/printk.c:2552
hardirqs last disabled at (1586): [<ffffffff8128f565>] console_unlock+0x835/0xb30 kernel/printk/printk.c:2467
softirqs last  enabled at (1048): [<ffffffff83e00f92>] asm_call_irq_on_stack+0x12/0x20
softirqs last disabled at (1605): [<ffffffff83e00f92>] asm_call_irq_on_stack+0x12/0x20
---[ end trace 74debda43463c497 ]---
capability: warning: `syz-executor.2' uses 32-bit capabilities (legacy support in use)
EXT4-fs (loop6): mounted filesystem without journal. Opts: ,errors=continue
netlink: 168 bytes leftover after parsing attributes in process `syz-executor.6'.
EXT4-fs (loop6): VFS: Can't find ext4 filesystem
EXT4-fs (loop6): VFS: Can't find ext4 filesystem
cgroup: Unknown subsys name 'perf_event'
cgroup: Unknown subsys name 'net_cls'