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Merge pull request #6133 from philljj/zd15662

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Fix malloc of zero size in fast_s_mp_sqr and fast_s_mp_mul_digs.
This commit is contained in:
David Garske
2023-02-27 10:47:29 -08:00
committed by GitHub
parent 12ccd01127 22b1857bee
commit 950e0d100a
1 changed files with 12 additions and 0 deletions
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12
wolfcrypt/src/integer.c
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@@ -3335,6 +3335,12 @@ int fast_s_mp_sqr (mp_int * a, mp_int * b)
if (pa > (int)MP_WARRAY) if (pa > (int)MP_WARRAY)
return MP_RANGE; /* TAO range check */ return MP_RANGE; /* TAO range check */
if (pa == 0) {
/* Nothing to do. Zero result and return. */
mp_zero(b);
return MP_OKAY;
}
#ifdef WOLFSSL_SMALL_STACK #ifdef WOLFSSL_SMALL_STACK
W = (mp_digit*)XMALLOC(sizeof(mp_digit) * pa, NULL, DYNAMIC_TYPE_BIGINT); W = (mp_digit*)XMALLOC(sizeof(mp_digit) * pa, NULL, DYNAMIC_TYPE_BIGINT);
if (W == NULL) if (W == NULL)
@@ -3454,6 +3460,12 @@ int fast_s_mp_mul_digs (mp_int * a, mp_int * b, mp_int * c, int digs)
if (pa > (int)MP_WARRAY) if (pa > (int)MP_WARRAY)
return MP_RANGE; /* TAO range check */ return MP_RANGE; /* TAO range check */
if (pa == 0) {
/* Nothing to do. Zero result and return. */
mp_zero(c);
return MP_OKAY;
}
#ifdef WOLFSSL_SMALL_STACK #ifdef WOLFSSL_SMALL_STACK
W = (mp_digit*)XMALLOC(sizeof(mp_digit) * pa, NULL, DYNAMIC_TYPE_BIGINT); W = (mp_digit*)XMALLOC(sizeof(mp_digit) * pa, NULL, DYNAMIC_TYPE_BIGINT);
if (W == NULL) if (W == NULL)