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Trying to write to read-only block-device loop6 (partno 0)
WARNING: CPU: 0 PID: 14203 at block/blk-core.c:588 submit_bio_checks+0x10de/0x14a0
Modules linked in:
CPU: 0 PID: 14203 Comm: syz-executor.6 Not tainted 5.17.0-rc4-next-20220217 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
RIP: 0010:submit_bio_checks+0x10de/0x14a0
Code: 00 00 45 0f b6 a4 24 48 05 00 00 48 89 ef 48 8d 74 24 58 e8 14 3e fe ff 48 c7 c7 20 e1 7b 84 48 89 c6 44 89 e2 e8 4a 77 05 02 <0f> 0b e9 91 f7 ff ff e8 16 c5 4d ff e8 21 a7 14 02 31 ff 41 89 c5
RSP: 0018:ffff88800f9cf740 EFLAGS: 00010282
RAX: 0000000000000000 RBX: 1ffff11001f39eef RCX: 0000000000000000
RDX: 0000000000040000 RSI: ffffffff812b1448 RDI: ffffed1001f39eda
RBP: ffff88800f0d6500 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff812ab0cc R11: 0000000000000000 R12: 0000000000000000
R13: ffff888007c84ec0 R14: ffff88800f0d6510 R15: ffff8880097a3990
FS:  00007fa6dc0d6700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe1a31c4718 CR3: 000000001d5bc000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 __submit_bio+0x64/0x270
 submit_bio_noacct+0x6c5/0x8a0
 submit_bh_wbc.constprop.0+0x423/0x5a0
 write_mmp_block+0x404/0x810
 ext4_multi_mount_protect+0x4fe/0xab0
 ext4_fill_super+0xd2a5/0xd810
 get_tree_bdev+0x424/0x740
 vfs_get_tree+0x8e/0x2f0
 path_mount+0x131b/0x1f80
 __x64_sys_mount+0x27e/0x300
 do_syscall_64+0x3b/0x90
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fa6deb6204a
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:00007fa6dc0d5fa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007fa6deb6204a
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007fa6dc0d6000
RBP: 00007fa6dc0d6040 R08: 00007fa6dc0d6040 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000000
R13: 0000000020000100 R14: 00007fa6dc0d6000 R15: 0000000020012b00
 </TASK>
irq event stamp: 2411
hardirqs last  enabled at (2419): [<ffffffff812aa998>] __up_console_sem+0x78/0x80
hardirqs last disabled at (2428): [<ffffffff812aa97d>] __up_console_sem+0x5d/0x80
softirqs last  enabled at (2080): [<ffffffff81166ac3>] __irq_exit_rcu+0x113/0x170
softirqs last disabled at (2073): [<ffffffff81166ac3>] __irq_exit_rcu+0x113/0x170
---[ end trace 0000000000000000 ]---
EXT4-fs (loop6): mounted filesystem without journal. Quota mode: none.
ext4 filesystem being mounted at /syzkaller-testdir433786765/syzkaller.NgfcPb/299/file0 supports timestamps until 2038 (0x7fffffff)