------------[ cut here ]------------ Trying to write to read-only block-device loop4 (partno 0) WARNING: CPU: 1 PID: 401 at block/blk-core.c:705 bio_check_ro block/blk-core.c:705 [inline] WARNING: CPU: 1 PID: 401 at block/blk-core.c:705 submit_bio_checks+0x14db/0x18d0 block/blk-core.c:833 Modules linked in: CPU: 1 PID: 401 Comm: syz-executor.4 Not tainted 5.10.49 #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+0x14db/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 47 37 fe ff 48 c7 c7 a0 4d 3a 84 48 89 c6 44 89 e2 e8 11 3c 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:ffff88804089fa10 EFLAGS: 00010286 RAX: 0000000000000000 RBX: 1ffff11008113f48 RCX: 0000000000000000 RDX: ffff88800de8b280 RSI: ffffffff81293b93 RDI: ffffed1008113f34 RBP: ffff888052edbd00 R08: 0000000000000001 R09: ffff88806cf2facf R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 R13: ffff88800eda9820 R14: ffff888052edbd10 R15: ffff888052edbd08 FS: 000000000220d400(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffce8c6fcf8 CR3: 0000000040dda000 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 ext4_commit_super+0x83d/0xc60 fs/ext4/super.c:5554 ext4_put_super+0x205/0xfc0 fs/ext4/super.c:1211 generic_shutdown_super+0x142/0x370 fs/super.c:464 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:00007ffce8c70438 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 000000000000043c RCX: 0000000000467a67 RDX: 00007ffce8c7050b RSI: 0000000000000002 RDI: 00007ffce8c70500 RBP: 00007ffce8c70500 R08: 00000000ffffffff R09: 00007ffce8c702d0 R10: 000000000220eb43 R11: 0000000000000246 R12: 00000000004bee70 R13: 00007ffce8c715d0 R14: 000000000220eb00 R15: 00007ffce8c71610 irq event stamp: 3414925 hardirqs last enabled at (3414933): [] console_unlock+0x929/0xb30 kernel/printk/printk.c:2552 hardirqs last disabled at (3414994): [] console_unlock+0x835/0xb30 kernel/printk/printk.c:2467 softirqs last enabled at (3414992): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (3414941): [] asm_call_irq_on_stack+0x12/0x20 ---[ end trace 2df93ee286350c05 ]--- EXT4-fs (loop2): mounted filesystem without journal. Opts: ,errors=continue audit: type=1326 audit(1626257725.761:1231): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=15903 comm="syz-executor.6" exe="/syz-executor.6" sig=31 arch=c000003e syscall=202 compat=0 ip=0x466609 code=0x0 audit: type=1326 audit(1626257725.761:1232): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=15907 comm="syz-executor.3" exe="/syz-executor.3" sig=31 arch=c000003e syscall=202 compat=0 ip=0x466609 code=0x0 audit: type=1326 audit(1626257725.763:1233): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=15905 comm="syz-executor.0" exe="/syz-executor.0" sig=31 arch=c000003e syscall=202 compat=0 ip=0x466609 code=0x0 audit: type=1326 audit(1626257725.763:1234): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=15908 comm="syz-executor.7" exe="/syz-executor.7" sig=31 arch=c000003e syscall=202 compat=0 ip=0x466609 code=0x0