merchant

commit 0641151f6d83a013170fbc6c5282c59731d0057c
parent 712e86843ae40d0fad5dffedbe5dcae1d0d93eb2
Author: Christian Grothoff <christian@grothoff.org>
Date:   Sat, 10 Oct 2026 15:00:35 +0200

add overflow check

Diffstat:
M
src/util/amount_quantity.c
 | 
6
++++--

1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/src/util/amount_quantity.c b/src/util/amount_quantity.c
@@ -359,8 +359,10 @@ TALER_MERCHANT_amount_multiply_by_quantity (
                &final_value,
                &final_fraction);
 
-    /* Check for overflow */
-    if (0 != q_hi)
+    /* Check for overflow. Note that a `struct TALER_Amount` can only
+       represent values up to #TALER_AMOUNT_MAX_VALUE! */
+    if ( (0 != q_hi) ||
+         (final_value > TALER_AMOUNT_MAX_VALUE) )
       return GNUNET_NO;
 
     result->value = final_value;