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avcodec/targa: Do not return images when there is no image in the tga

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Fixes: Timeout
Fixes: 35877/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_TARGA_fuzzer-5407292819374080

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2021-07-20 22:14:21 +02:00
parent a4af92d7cb
commit 1e85a698c0
1 changed files with 4 additions and 4 deletions
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8
libavcodec/targa.c
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@ -176,6 +176,10 @@ static int decode_frame(AVCodecContext *avctx,
if ((ret = ff_set_dimensions(avctx, w, h)) < 0)
return ret;
if ((compr & (~TGA_RLE)) == TGA_NODATA) {
return avpkt->size;
}
if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
return ret;
p->pict_type = AV_PICTURE_TYPE_I;
@ -242,9 +246,6 @@ static int decode_frame(AVCodecContext *avctx,
}
}
if ((compr & (~TGA_RLE)) == TGA_NODATA) {
memset(p->data[0], 0, p->linesize[0] * h);
} else {
if (compr & TGA_RLE) {
int res = targa_decode_rle(avctx, s, dst, w, h, stride, bpp, interleave);
if (res < 0)
@ -289,7 +290,6 @@ static int decode_frame(AVCodecContext *avctx,
}
}
}
}
*got_frame = 1;