mlp_parser: Fix infinite loop with 0 bytes_left.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
13 years ago · e146ad95d7
parent bace181b48
commit e146ad95d7
1 changed files with 3 additions and 0 deletions
--- a/libavcodec/mlp_parser.c
+++ b/libavcodec/mlp_parser.c
@ -263,6 +263,9 @@ static int mlp_parse(AVCodecParserContext *s,
        mp->bytes_left = ((mp->pc.index > 0 ? mp->pc.buffer[0] : buf[0]) << 8)
                       |  (mp->pc.index > 1 ? mp->pc.buffer[1] : buf[1-mp->pc.index]);
        mp->bytes_left = (mp->bytes_left & 0xfff) * 2;
+        if (mp->bytes_left <= 0) { // prevent infinite loop
+            goto lost_sync;
+        }
        mp->bytes_left -= mp->pc.index;
    }