X-Git-Url: https://git.saurik.com/redis.git/blobdiff_plain/794e6ce14ff85f00b0d3e86365e9cc45a90d3bcf..f892797e1b459ad568df32d891b368302c40b3c9:/src/t_string.c

diff --git a/src/t_string.c b/src/t_string.c
index 2bd1646e..d6143ed2 100644
--- a/src/t_string.c
+++ b/src/t_string.c
@@ -344,11 +344,12 @@ void incrDecrCommand(redisClient *c, long long incr) {
     if (getLongLongFromObjectOrReply(c,o,&value,NULL) != REDIS_OK) return;
 
     oldvalue = value;
-    value += incr;
-    if ((incr < 0 && value > oldvalue) || (incr > 0 && value < oldvalue)) {
+    if ((incr < 0 && oldvalue < 0 && incr < (LLONG_MIN-oldvalue)) ||
+        (incr > 0 && oldvalue > 0 && incr > (LLONG_MAX-oldvalue))) {
         addReplyError(c,"increment or decrement would overflow");
         return;
     }
+    value += incr;
     new = createStringObjectFromLongLong(value);
     if (o)
         dbOverwrite(c->db,c->argv[1],new);