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adjust sanity check in integer.c to avoid reading uninitialized values

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Jacob Barthelmeh
2017-08-02 10:39:05 -06:00
parent 062f3efa6d
commit 43b04af388
1 changed files with 5 additions and 1 deletions
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6
wolfcrypt/src/integer.c
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@ -3847,6 +3847,10 @@ int fast_s_mp_mul_high_digs (mp_int * a, mp_int * b, mp_int * c, int digs)
#endif
mp_word _W;
if (a->dp == NULL) { /* JRB, avoid reading uninitialized values */
return MP_VAL;
}
/* grow the destination as required */
pa = a->used + b->used;
if (c->alloc < pa) {
@ -3867,7 +3871,7 @@ int fast_s_mp_mul_high_digs (mp_int * a, mp_int * b, mp_int * c, int digs)
/* number of output digits to produce */
pa = a->used + b->used;
_W = 0;
for (ix = digs; ix < pa && a->dp; ix++) {
for (ix = digs; ix < pa; ix++) { /* JRB, have a->dp check at top of function*/
int tx, ty, iy;
mp_digit *tmpx, *tmpy;