Initial local variables to secure default
Unfortunately compilers aren't good at analyzing whether variables are
analyzed on all code paths, and it is better to initialize to the
safe-path values.
Signed-off-by: Janos Follath <janos.follath@arm.com>
diff --git a/tf-psa-crypto/drivers/builtin/src/bignum_core.c b/tf-psa-crypto/drivers/builtin/src/bignum_core.c
index 58e0172..97e212d 100644
--- a/tf-psa-crypto/drivers/builtin/src/bignum_core.c
+++ b/tf-psa-crypto/drivers/builtin/src/bignum_core.c
@@ -857,8 +857,8 @@
/* We'll process the bits of E from most significant
* (limb_index=E_limbs-1, E_bit_index=biL-1) to least significant
* (limb_index=0, E_bit_index=0). */
- size_t E_limb_index;
- size_t E_bit_index;
+ size_t E_limb_index = E_limbs;
+ size_t E_bit_index = 0;
exp_mod_calc_first_bit_optionally_safe(E, E_limbs, E_public,
&E_limb_index, &E_bit_index);