src: fix possible null pointer dereference in nft_*_attr_get_*

As reported by John Sager, nft_set_attr_get_u32 can cause a
segfault because nft_set_attr_get can return NULL. Check for
a non-NULL pointer before dereferencing.

This closes netfilter bugzilla #868.

[ I have mangled this patch to solve possible null pointer
  dereference with get operations with rule objects --pablo ]

Signed-off-by: Phil Oester <kernel@linuxace.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

0 files changed, 0 insertions, 0 deletions