diff --git a/src/util.c b/src/util.c
index eb6cd650c..942d9969f 100644
--- a/src/util.c
+++ b/src/util.c
@@ -33,8 +33,11 @@
 
 /* Glob-style pattern matching. */
 static int stringmatchlen_impl(const char *pattern, int patternLen,
-        const char *string, int stringLen, int nocase, int *skipLongerMatches)
+        const char *string, int stringLen, int nocase, int *skipLongerMatches, int nesting)
 {
+    /* Protection against abusive patterns. */
+    if (nesting > 1000) return 0;
+
     while(patternLen && stringLen) {
         switch(pattern[0]) {
         case '*':
@@ -46,7 +49,7 @@ static int stringmatchlen_impl(const char *pattern, int patternLen,
                 return 1; /* match */
             while(stringLen) {
                 if (stringmatchlen_impl(pattern+1, patternLen-1,
-                            string, stringLen, nocase, skipLongerMatches))
+                            string, stringLen, nocase, skipLongerMatches, nesting+1))
                     return 1; /* match */
                 if (*skipLongerMatches)
                     return 0; /* no match */
@@ -168,7 +171,7 @@ static int stringmatchlen_impl(const char *pattern, int patternLen,
 int stringmatchlen(const char *pattern, int patternLen,
         const char *string, int stringLen, int nocase) {
     int skipLongerMatches = 0;
-    return stringmatchlen_impl(pattern,patternLen,string,stringLen,nocase,&skipLongerMatches);
+    return stringmatchlen_impl(pattern,patternLen,string,stringLen,nocase,&skipLongerMatches,0);
 }
 
 int stringmatch(const char *pattern, const char *string, int nocase) {
diff --git a/tests/unit/keyspace.tcl b/tests/unit/keyspace.tcl
index abfda9cc6..03d8c9669 100644
--- a/tests/unit/keyspace.tcl
+++ b/tests/unit/keyspace.tcl
@@ -514,6 +514,12 @@ foreach {type large} [array get largevalue] {
         r KEYS "a*a*a*a*a*a*a*a*a*a*a*a*a*a*a*a*a*a*a*a*b"
     } {}
 
+    test {Regression for pattern matching very long nested loops} {
+        r flushdb
+        r SET [string repeat "a" 50000] 1
+        r KEYS [string repeat "*?" 50000]
+    } {}
+
     test {Coverage: basic SWAPDB test and unhappy path} {
        r flushall
        r select 0