Re: [PATCH v3] eal/linuxapp: fix resource leak

[Sergio Gonzalez Monroy <sergio.gonzalez.monroy@intel.com>]

On 22/06/2016 17:50, Daniel Mrzyglod wrote:
> This patch fix all cases to do proper handle all munmap if pointer
> of hugepage is not NULL which prohibits resource leak.

I would reword the above commit to something like:

Current code does not munmap 'hugepage' mapping (hugepage info file) on 
function
exit, leaking resources.

> Coverity issue: 97920
> Fixes: b6a468ad41d5 ("memory: add --socket-mem option")
>
> Signed-off-by: Daniel Mrzyglod <danielx.t.mrzyglod@intel.com>
> ---
>   lib/librte_eal/linuxapp/eal/eal_memory.c | 6 ++++--
>   1 file changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/lib/librte_eal/linuxapp/eal/eal_memory.c b/lib/librte_eal/linuxapp/eal/eal_memory.c
> index 9251a5b..9b0d39a 100644
> --- a/lib/librte_eal/linuxapp/eal/eal_memory.c
> +++ b/lib/librte_eal/linuxapp/eal/eal_memory.c
> @@ -1051,7 +1051,7 @@ int
>   rte_eal_hugepage_init(void)
>   {
>   	struct rte_mem_config *mcfg;
> -	struct hugepage_file *hugepage, *tmp_hp = NULL;
> +	struct hugepage_file *hugepage = NULL, *tmp_hp = NULL;
>   	struct hugepage_info used_hp[MAX_HUGEPAGE_SIZES];
>   
>   	uint64_t memory[RTE_MAX_NUMA_NODES];
> @@ -1367,13 +1367,15 @@ rte_eal_hugepage_init(void)
>   			"of memory.\n",
>   			i, nr_hugefiles, RTE_STR(CONFIG_RTE_MAX_MEMSEG),
>   			RTE_MAX_MEMSEG);
> -		return -ENOMEM;
> +		goto fail;
>   	}
>   

I missed this but we should also munmap 'hugepage' on successful 
function exit.

Sergio

>   	return 0;
>   
>   fail:
>   	free(tmp_hp);
> +	if (hugepage != NULL)
> +		munmap(hugepage, nr_hugefiles * sizeof(struct hugepage_file));
>   	return -1;
>   }
>