avcodec/movtextdec: Make tx3g_ptr unsigned

Fixes integer overflow Fixes: efe937780e95574250dabe07151bdc23/unknown_unknown_351_849_cov_3187578556_shellymanne.mov Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
10 years ago · a1a32fdb0e
parent baeb8f5f71
commit a1a32fdb0e
1 changed files with 1 additions and 1 deletions
--- a/libavcodec/movtextdec.c
+++ b/libavcodec/movtextdec.c
@ -132,7 +132,7 @@ static void mov_text_cleanup_ftab(MovTextContext *m)

 static int mov_text_tx3g(AVCodecContext *avctx, MovTextContext *m)
 {
-    char *tx3g_ptr = avctx->extradata;
+    uint8_t *tx3g_ptr = avctx->extradata;
    int i, box_size, font_length;
    int8_t v_align, h_align;
    int style_fontID;