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xfrm: remove VLA usage in __xfrm6_sort() 

In the quest to remove all stack VLA usage removed from the kernel[1],
just use XFRM_MAX_DEPTH as already done for the "class" array. In one
case, it'll do this loop up to 5, the other caller up to 6.

[1] https://lkml.org/lkml/2018/3/7/621

Co-developed-by: Andreas Christoforou <andreaschristofo@gmail.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Acked-by: Stefano Brivio <sbrivio@redhat.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
This commit is contained in:
Kees Cook 2018-04-25 07:46:39 -07:00 committed by Steffen Klassert
parent cd027a5433
commit c926ca1605
1 changed files with 2 additions and 4 deletions
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6
net/ipv6/xfrm6_state.c
View File

@ -60,11 +60,9 @@ xfrm6_init_temprop(struct xfrm_state *x, const struct xfrm_tmpl *tmpl,
static int
__xfrm6_sort(void **dst, void **src, int n, int (*cmp)(void *p), int maxclass)
{
int i;
int count[XFRM_MAX_DEPTH] = { };
int class[XFRM_MAX_DEPTH];
int count[maxclass];
memset(count, 0, sizeof(count));
int i;
for (i = 0; i < n; i++) {
int c;