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| author | Michael Niedermayer <michael@niedermayer.cc> | 2018-02-26 23:17:08 +0300 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2018-02-27 21:59:58 +0300 |
| commit | add3c2468e960767c7fc7232ab8a492f8c55e65b (patch) | |
| tree | 145cb43748fa1394870e652aeb87ba726d48b7f8 | |
| parent | fbf690d79a611a8dd9df1bce4189e5bf9c05508a (diff) | |
avcodec/bintext: sanity check dimensions
Fixes: Timeout
Fixes: 6277/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_XBIN_fuzzer-6047202288861184
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 090c0abff9c8b27304614f15d9464dbf4ea59833)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/bintext.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/libavcodec/bintext.c b/libavcodec/bintext.c index 90bbe67b59..d967317671 100644 --- a/libavcodec/bintext.c +++ b/libavcodec/bintext.c @@ -35,6 +35,8 @@ #include "bintext.h" #include "internal.h" +#define FONT_WIDTH 8 + typedef struct XbinContext { AVFrame *frame; int palette[16]; @@ -91,6 +93,9 @@ static av_cold int decode_init(AVCodecContext *avctx) break; } } + if (avctx->width < FONT_WIDTH || avctx->height < s->font_height) + return AVERROR_INVALIDDATA; + s->frame = av_frame_alloc(); if (!s->frame) @@ -113,8 +118,6 @@ av_unused static void hscroll(AVCodecContext *avctx) } } -#define FONT_WIDTH 8 - /** * Draw character to screen */ |