EXT4-fs warning (device loop5): ext4_multi_mount_protect:384: Unable to create kmmpd thread for loop5. EXT4-fs (loop3): mounted filesystem without journal. Opts: ,errors=continue ext4 filesystem being mounted at /syzkaller-testdir479786963/syzkaller.2rl61k/14/file0 supports timestamps until 2038 (0x7fffffff) INFO: task syz-executor.6:4589 blocked for more than 143 seconds. Not tainted 5.10.109 #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.6 state:D stack:27760 pid: 4589 ppid: 287 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:3791 [inline] __schedule+0x848/0x1e80 kernel/sched/core.c:4540 schedule+0xcb/0x270 kernel/sched/core.c:4618 __io_uring_task_cancel+0x1ae/0x250 fs/io_uring.c:8924 io_uring_task_cancel include/linux/io_uring.h:46 [inline] bprm_execve+0x114/0x1b00 fs/exec.c:1785 do_execveat_common+0x621/0x7c0 fs/exec.c:1915 do_execveat fs/exec.c:1994 [inline] __do_sys_execveat fs/exec.c:2070 [inline] __se_sys_execveat fs/exec.c:2062 [inline] __x64_sys_execveat+0xed/0x130 fs/exec.c:2062 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f00c89dfb19 RSP: 002b:00007f00c5f55188 EFLAGS: 00000246 ORIG_RAX: 0000000000000142 RAX: ffffffffffffffda RBX: 00007f00c8af2f60 RCX: 00007f00c89dfb19 RDX: 0000000000000000 RSI: 0000000020000000 RDI: ffffffffffffffff RBP: 00007f00c8a39f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd4b7a2b9f R14: 00007f00c5f55300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/22: #0: ffffffff84df6fe0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x269 kernel/locking/lockdep.c:6379 1 lock held by in:imklog/178: #0: ffff88800c9b6370 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:974 =============================================