avformat/aiffdec: fix signed integer overflow

Fixes #8151
2019-09-25 17:36:52 +02:00 · 2019-09-25 17:36:52 +02:00 · d58752bcb9
parent 121bf1b3b8
commit d58752bcb9
1 changed files with 4 additions and 1 deletions
--- a/libavformat/aiffdec.c
+++ b/libavformat/aiffdec.c
@ -243,7 +243,10 @@ static int aiff_read_header(AVFormatContext *s)
        if (size < 0)
            return size;

-        filesize -= size + 8;
+        if (size >= 0x7fffffff - 8)
+            filesize = 0;
+        else
+            filesize -= size + 8;

        switch (tag) {
        case MKTAG('C', 'O', 'M', 'M'):     /* Common chunk */