From 1d293d0093d58aeae09a3525d9755fae9d42f181 Mon Sep 17 00:00:00 2001
From: Jeff Peeler <jpeeler@digium.com>
Date: Tue, 26 Jan 2010 18:07:57 +0000
Subject: [PATCH] Fix crash resulting from frames with invalid data pointers.
In ast_frdup the frame data union does not get set to point to malloced memory
if the datalen is zero, so make sure to handle the same case in ast_frisolate
appropriately.
(closes issue #16058)
Reported by: atis
Patches:
bug16058-fix.patch uploaded by jpeeler (license 325)
Tested by: atis
git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@243244 65c4cc65-6c06-0410-ace0-fbb531ad65f3
---
main/frame.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/main/frame.c b/main/frame.c
index 1f1476c7c1..c90469bba1 100644
--- a/main/frame.c
+++ b/main/frame.c
@@ -435,6 +435,11 @@ struct ast_frame *ast_frisolate(struct ast_frame *fr)
}
if (!(fr->mallocd & AST_MALLOCD_DATA)) {
+ if (!fr->datalen) {
+ out->data.uint32 = fr->data.uint32;
+ out->mallocd = AST_MALLOCD_HDR | AST_MALLOCD_SRC;
+ return out;
+ }
if (!(newdata = ast_malloc(fr->datalen + AST_FRIENDLY_OFFSET))) {
if (out->src != fr->src) {
ast_free((void *) out->src);
--
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