From eeab356c298248108b82157ef51172ba040646f7 Mon Sep 17 00:00:00 2001 From: Kurt Roeckx Date: Thu, 15 Dec 2016 20:23:52 +0100 Subject: [PATCH] Don't call memcpy with NULL as source Calling it with lenght 0 and NULL as source is undefined behaviour. Reviewed-by: Rich Salz GH: #2089 --- crypto/bn/bn_intern.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/crypto/bn/bn_intern.c b/crypto/bn/bn_intern.c index 9227b6e241..2c970647de 100644 --- a/crypto/bn/bn_intern.c +++ b/crypto/bn/bn_intern.c @@ -167,7 +167,8 @@ int bn_copy_words(BN_ULONG *out, const BIGNUM *in, int size) return 0; memset(out, 0, sizeof(*out) * size); - memcpy(out, in->d, sizeof(*out) * in->top); + if (in->d != NULL) + memcpy(out, in->d, sizeof(*out) * in->top); return 1; } -- 2.25.1