util-buffer: expand by multiples of 4k

(cherry picked from commit 287d8360e7a7263e23194470ed59e08982f76e31)

diff --git a/src/util-buffer.c b/src/util-buffer.c
index 05b365825818893d99155a92d836606b02629a2d..cfc190087ee7820dcde73e5c465999d9df822e0e 100644 (file)
--- a/src/util-buffer.c
+++ b/src/util-buffer.c
@@ -65,6 +65,11 @@ int MemBufferExpand(MemBuffer **buffer, uint32_t expand_by) {
         return -1;
     }
 
+    /* Adjust expand_by to next multiple of 4k. */
+    if (expand_by % 4096 != 0) {
+        expand_by = expand_by - (expand_by % 4096) + 4096;
+    }
+
     size_t total_size = (*buffer)->size + sizeof(MemBuffer) + expand_by;
 
     MemBuffer *tbuffer = SCRealloc(*buffer, total_size);