[FFmpeg-devel] [PATCH 3/5] avcodec/hevc/hevcdec: SPS not set (or cleared) after frame start

From: Michael Niedermayer <michael@niedermayer.cc>
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
Subject: [FFmpeg-devel] [PATCH 3/5] avcodec/hevc/hevcdec: SPS not set (or cleared) after frame start
Date: Mon, 24 Jun 2024 01:01:35 +0200
Message-ID: <20240623230137.1749178-3-michael@niedermayer.cc> (raw)
In-Reply-To: <20240623230137.1749178-1-michael@niedermayer.cc>

Fixes: NULL pointer dereference
Fixes: 69623/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_HEVC_fuzzer-6549698459009024

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
 libavcodec/hevc/hevcdec.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/libavcodec/hevc/hevcdec.c b/libavcodec/hevc/hevcdec.c
index d68d454537a..4dd84d4953c 100644
--- a/libavcodec/hevc/hevcdec.c
+++ b/libavcodec/hevc/hevcdec.c
@@ -3180,6 +3180,9 @@ static int decode_slice(HEVCContext *s, const H2645NAL *nal, GetBitContext *gb)
     } else if (!s->cur_frame) {
         av_log(s->avctx, AV_LOG_ERROR, "First slice in a frame missing.\n");
         return AVERROR_INVALIDDATA;
+    } else if (!s->ps.sps) {
+        av_log(s->avctx, AV_LOG_ERROR, "sps not set in slice.\n");
+        return AVERROR_INVALIDDATA;
     }
 
     if (s->nal_unit_type != s->first_nal_type) {
-- 
2.45.2

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