From: Limin Wang <[email protected]>
Signed-off-by: Limin Wang <[email protected]>
---
libavcodec/ccaption_dec.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/libavcodec/ccaption_dec.c b/libavcodec/ccaption_dec.c
index 34f0513b1a..8f61e8aa03 100644
--- a/libavcodec/ccaption_dec.c
+++ b/libavcodec/ccaption_dec.c
@@ -852,6 +852,11 @@ static int decode(AVCodecContext *avctx, AVSubtitle *sub,
int i;
unsigned nb_rect_allocated = 0;
+ if (len < 3) {
+ ff_dlog(avctx, "incomplete or broken packet");
+ return len;
+ }
+
for (i = 0; i < len; i += 3) {
uint8_t hi, cc_type = bptr[i] & 1;
@@ -922,7 +927,7 @@ static int decode(AVCodecContext *avctx, AVSubtitle *sub,
}
*got_sub = sub->num_rects > 0;
- return ret;
+ return len;
}
#define OFFSET(x) offsetof(CCaptionSubContext, x)
--
2.35.1
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