X-Git-Url: https://git.saurik.com/redis.git/blobdiff_plain/6e09ad1c156f10246ccd0f2de5b11a9635e28818..a400a9b2d753fcfc90aa234019ab7afd21966509:/src/t_hash.c

diff --git a/src/t_hash.c b/src/t_hash.c
index 8ee5485c..b8e2ad31 100644
--- a/src/t_hash.c
+++ b/src/t_hash.c
@@ -320,7 +320,7 @@ void hmsetCommand(redisClient *c) {
 }
 
 void hincrbyCommand(redisClient *c) {
-    long long value, incr;
+    long long value, incr, oldvalue;
     robj *o, *current, *new;
 
     if (getLongLongFromObjectOrReply(c,c->argv[3],&incr,NULL) != REDIS_OK) return;
@@ -336,7 +336,12 @@ void hincrbyCommand(redisClient *c) {
         value = 0;
     }
 
+    oldvalue = value;
     value += incr;
+    if ((incr < 0 && value > oldvalue) || (incr > 0 && value < oldvalue)) {
+        addReplyError(c,"increment or decrement would overflow");
+        return;
+    }
     new = createStringObjectFromLongLong(value);
     hashTypeTryObjectEncoding(o,&c->argv[2],NULL);
     hashTypeSet(o,c->argv[2],new);