#185 fix out of range read from uint3korr

storage/tokudb/ha_tokudb.cc

@@ -665,7 +665,7 @@ static ulonglong retrieve_auto_increment(uint16 type, uint32 offset,const uchar
         break;
 
     case HA_KEYTYPE_UINT24:
-        unsigned_autoinc = (ulonglong) uint3korr(key);
+        unsigned_autoinc = (ulonglong) tokudb_uint3korr(key);
         break;
 
     case HA_KEYTYPE_LONGLONG:
@@ -994,7 +994,7 @@ static uchar* pack_toku_field_blob(
         length = uint2korr(from_mysql);
         break;
     case (3):
-        length = uint3korr(from_mysql);
+        length = tokudb_uint3korr(from_mysql);
         break;
     case (4):
         length = uint4korr(from_mysql);

storage/tokudb/hatoku_cmp.cc

@@ -428,8 +428,8 @@ static inline int cmp_toku_int (uchar* a_buf, uchar* b_buf, bool is_unsigned, ui
             ret_val = a_num-b_num;
             goto exit;
         case (3):
-            a_num = uint3korr(a_buf);
-            b_num = uint3korr(b_buf);
+            a_num = tokudb_uint3korr(a_buf);
+            b_num = tokudb_uint3korr(b_buf);
             ret_val = a_num-b_num;
             goto exit;
         case (4):
@@ -663,7 +663,7 @@ static inline uchar* pack_toku_varbinary(
         length = uint2korr(from_mysql);
         break;
     case (3):
-        length = uint3korr(from_mysql);
+        length = tokudb_uint3korr(from_mysql);
         break;
     case (4):
         length = uint4korr(from_mysql);
@@ -777,7 +777,7 @@ static inline uchar* pack_toku_blob(
         length = uint2korr(from_mysql);
         break;
     case (3):
-        length = uint3korr(from_mysql);
+        length = tokudb_uint3korr(from_mysql);
         break;
     case (4):
         length = uint4korr(from_mysql);
@@ -932,7 +932,7 @@ static inline uchar* pack_toku_varstring(
         length = uint2korr(from_mysql);
         break;
     case (3):
-        length = uint3korr(from_mysql);
+        length = tokudb_uint3korr(from_mysql);
         break;
     case (4):
         length = uint4korr(from_mysql);

storage/tokudb/hatoku_cmp.h

@@ -243,7 +243,7 @@ static inline uint32_t get_blob_field_len(
         length = uint2korr(from_tokudb);
         break;
     case (3):
-        length = uint3korr(from_tokudb);
+        length = tokudb_uint3korr(from_tokudb);
         break;
     case (4):
         length = uint4korr(from_tokudb);

storage/tokudb/hatoku_defines.h

@@ -497,4 +497,11 @@ static const char *tokudb_thd_get_proc_info(THD *thd) {
     return thd->proc_info;
 }
 
+// uint3korr reads 4 bytes and valgrind reports an error, so we use this function instead
+static uint tokudb_uint3korr(const uchar *a) {
+    uchar b[4] = {};
+    memcpy(b, a, 3);
+    return uint3korr(b);
+}
+
 #endif // _TOKUDB_PORTABILITY_H