Avoid divide by 0 exception

CLA: trivial

Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Paul Dale <pauli@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/19310)

diff --git a/include/internal/safe_math.h b/include/internal/safe_math.h
index 9a20957eb6585c720ea4ded2201f8261222b85ec..be37e6ab882ed746f4fa9d854337a9b002f2b3d5 100644 (file)
--- a/include/internal/safe_math.h
+++ b/include/internal/safe_math.h
@@ -183,7 +183,7 @@
                                                                type b,       \
                                                                int *err)     \
     {                                                                        \
-        if (a > max / b)                                                     \
+        if (b != 0 && a > max / b)                                           \
             *err |= 1;                                                       \
         return a * b;                                                        \
     }