[dpdk-dev] [PATCH v2] eal: unmap undesired address upon config reattach failure

[David Marchand]

On Mon, Aug 19, 2019 at 3:58 PM Arnon Warshavsky <arnon at qwilt.com> wrote:
>
> Have rte_eal_config_reattach clean up the mapped address
> which is a valid address but not the one intended.
>
> Coverity issue: 343439
> Fixes: 4e8854ae89fa ("eal: do not panic on shared memory init")
> Fixes: b149a7064261 ("eal/freebsd: add config reattach in secondary")
> Signed-off-by: Arnon Warshavsky <arnon at qwilt.com>
> ---
>
> -v2 added fixes messages and applied also to freebsd
>
>  lib/librte_eal/freebsd/eal/eal.c | 1 +
>  lib/librte_eal/linux/eal/eal.c   | 1 +
>  2 files changed, 2 insertions(+)
>
> diff --git a/lib/librte_eal/freebsd/eal/eal.c b/lib/librte_eal/freebsd/eal/eal.c
> index d53f0fe..963db76 100644
> --- a/lib/librte_eal/freebsd/eal/eal.c
> +++ b/lib/librte_eal/freebsd/eal/eal.c
> @@ -341,6 +341,7 @@ enum rte_iova_mode
>                 /* errno is stale, don't use */
>                 RTE_LOG(ERR, EAL, "Cannot mmap memory for rte_config at [%p], got [%p]\n",
>                           rte_mem_cfg_addr, mem_config);
> +               munmap(mem_config, sizeof(struct rte_mem_config));
>                 return -1;
>         }
>
> diff --git a/lib/librte_eal/linux/eal/eal.c b/lib/librte_eal/linux/eal/eal.c
> index 946222c..fac69b9 100644
> --- a/lib/librte_eal/linux/eal/eal.c
> +++ b/lib/librte_eal/linux/eal/eal.c
> @@ -438,6 +438,7 @@ enum rte_iova_mode
>                         RTE_LOG(ERR, EAL, "Cannot mmap memory for rte_config at [%p], got [%p]"
>                                 " - please use '--base-virtaddr' option\n",
>                                 rte_mem_cfg_addr, mem_config);
> +                       munmap(mem_config, sizeof(struct rte_mem_config));
>                         return -1;
>                 }
>                 RTE_LOG(ERR, EAL, "Cannot mmap memory for rte_config! error %i (%s)\n",
> --
> 1.8.3.1
>

Thanks Arnon.
Reviewed-by: David Marchand <david.marchand at redhat.com>


-- 
David Marchand