From 9c5f25049189530aa7ef9a0fc3444bbb22126f49 Mon Sep 17 00:00:00 2001
From: learman <learman@a1c6a512-1295-4272-9138-f99709370657>
Date: Sun, 14 Oct 2007 13:27:01 +0000
Subject: [PATCH] MP4 tag parser: guard against problems when the buffer is
 full.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@15105 a1c6a512-1295-4272-9138-f99709370657
---
 apps/metadata/mp4.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/apps/metadata/mp4.c b/apps/metadata/mp4.c
index 4a1fba11c..31c9509b9 100644
--- a/apps/metadata/mp4.c
+++ b/apps/metadata/mp4.c
@@ -109,7 +109,7 @@ static unsigned int read_mp4_tag_string(int fd, int size_left, char** buffer,
                                         unsigned int* buffer_left, char** dest)
 {
     unsigned int bytes_read = read_mp4_tag(fd, size_left, *buffer,
-        *buffer_left - 1);
+        *buffer_left > 0 ? *buffer_left - 1 : 0);
     unsigned int length = 0;
 
     if (bytes_read)
-- 
2.11.4.GIT