Re: [PATCH] ipc: mqueue: fix possible memory leak in init_mqueue_fs()

["Eric W. Biederman" <ebiederm@xmission.com>]

Hangyu Hua <hbh25y@gmail.com> writes:

> commit db7cfc380900 ("ipc: Free mq_sysctls if ipc namespace creation
> failed")
>
> Here's a similar memory leak to the one fixed by the patch above.
> retire_mq_sysctls need to be called when init_mqueue_fs fails after
> setup_mq_sysctls.

Alex can you review this change?

> Fixes: dc55e35f9e81 ("ipc: Store mqueue sysctls in the ipc namespace")
> Signed-off-by: Hangyu Hua <hbh25y@gmail.com>
> ---
>  ipc/mqueue.c | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/ipc/mqueue.c b/ipc/mqueue.c
> index 12ad7860bb88..83370fef8879 100644
> --- a/ipc/mqueue.c
> +++ b/ipc/mqueue.c
> @@ -1746,6 +1746,7 @@ static int __init init_mqueue_fs(void)
>  	unregister_filesystem(&mqueue_fs_type);
>  out_sysctl:
>  	kmem_cache_destroy(mqueue_inode_cachep);
> +	retire_mq_sysctls(&init_ipc_ns);
>  	return error;
>  }

Thanks,
Eric