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commit d707a4af8026b502ab39d3238101c8b4c4131d99 Author: Michael Niedermayer <[email protected]> AuthorDate: Sat Feb 7 00:35:29 2026 +0100 Commit: Michael Niedermayer <[email protected]> CommitDate: Fri Mar 6 02:33:59 2026 +0100 avcodec/pnmdec: Check input size against width*height assuming at least 1bit per pixel Fixes: Timeout Fixes: 481427018/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_PHM_DEC_fuzzer-6315469467615232 Fixes: 485843949/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_PHM_DEC_fuzzer-4753439270961152 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <[email protected]> --- libavcodec/pnmdec.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/libavcodec/pnmdec.c b/libavcodec/pnmdec.c index 68bb7a41ec..b99b26a390 100644 --- a/libavcodec/pnmdec.c +++ b/libavcodec/pnmdec.c @@ -63,6 +63,9 @@ static int pnm_decode_frame(AVCodecContext *avctx, AVFrame *p, if (avctx->skip_frame >= AVDISCARD_ALL) return avpkt->size; + if (avctx->width * avctx->height / 8 > s->bytestream_end - s->bytestream) + return AVERROR_INVALIDDATA; + if ((ret = ff_get_buffer(avctx, p, 0)) < 0) return ret; avctx->bits_per_raw_sample = av_log2(s->maxval) + 1; _______________________________________________ ffmpeg-cvslog mailing list -- [email protected] To unsubscribe send an email to [email protected]
