[dpdk-stable] [PATCH v3] mem: fix undefined behavior in NUMA code

[Ilya Maximets]

On 21.09.2018 12:27, Anatoly Burakov wrote:
> When NUMA-aware hugepages config option is set, we rely on
> libnuma to tell the kernel to allocate hugepages on a specific
> NUMA node. However, we allocate node mask before we check if
> NUMA is available in the first place, which, according to
> the manpage [1], causes undefined behaviour.
> 
> Fix by only using nodemask when we have NUMA available.
> 
> [1] https://linux.die.net/man/3/numa_alloc_onnode
> 
> Bugzilla ID: 20
> 
> Fixes: 1b72605d2416 ("mem: balanced allocation of hugepages")
> Cc: i.maximets at samsung.com
> Cc: stable at dpdk.org
> 
> Signed-off-by: Anatoly Burakov <anatoly.burakov at intel.com>
> ---
> 
> Notes:
>     v3:
>     - Fix potential memory leak if socket-mem was not specified
>     
>     v2:
>     - Improve readability as per Ilya's comment
> 
>  lib/librte_eal/linuxapp/eal/eal_memory.c | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)

LGTM,
Acked-by: Ilya Maximets <i.maximets at samsung.com>