From 442375fee7f1fb15e42fbc128dc38bdfcc2cc105 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sat, 1 Jun 2019 19:06:07 +0200 Subject: [PATCH] avcodec/mjpegdec: Check for non ls PAL8 Fixes: Null-dereference READ in av_malloc Fixes: 15002/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_THP_fuzzer-5643474625363968 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavcodec/mjpegdec.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/libavcodec/mjpegdec.c b/libavcodec/mjpegdec.c index e82c185433..20eeb960bb 100644 --- a/libavcodec/mjpegdec.c +++ b/libavcodec/mjpegdec.c @@ -719,7 +719,9 @@ unk_pixfmt: } if ((s->rgb && !s->lossless && !s->ls) || - (!s->rgb && s->ls && s->nb_components > 1)) { + (!s->rgb && s->ls && s->nb_components > 1) || + (s->avctx->pix_fmt == AV_PIX_FMT_PAL8 && !s->ls) + ) { av_log(s->avctx, AV_LOG_ERROR, "Unsupported coding and pixel format combination\n"); return AVERROR_PATCHWELCOME; }