From: Jason Ish <jason.ish@oisf.net>
Date: Thu, 28 Nov 2024 15:20:18 +0000 (-0600)
Subject: util-buffer: expand by multiples of 4k
X-Git-Tag: suricata-8.0.0-beta1~681
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=287d8360e7a7263e23194470ed59e08982f76e31;p=thirdparty%2Fsuricata.git

util-buffer: expand by multiples of 4k
---

diff --git a/src/util-buffer.c b/src/util-buffer.c
index 677805b400..6caaf97b52 100644
--- 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);