From: Michael Niedermayer <michael@niedermayer.cc>
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
Subject: [FFmpeg-devel] [PATCH 5/5] avcodec/cbs_apv_syntax_template: Check tile_data_size
Date: Sat, 21 Jun 2025 23:15:21 +0200
Message-ID: <20250621211521.895204-5-michael@niedermayer.cc> (raw)
In-Reply-To: <20250621211521.895204-1-michael@niedermayer.cc>
Fixes: heap-buffer-overflow
Fixes: 418421333/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_APV_fuzzer-6592025183191040
Fixes: 418804929/clusterfuzz-testcase-minimized-ffmpeg_BSF_APV_METADATA_fuzzer-5773904646045696
Fixes: 420737045/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_APV_fuzzer-5535272169439232
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
libavcodec/cbs_apv_syntax_template.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/libavcodec/cbs_apv_syntax_template.c b/libavcodec/cbs_apv_syntax_template.c
index fc8a08ff31d..b84565b1076 100644
--- a/libavcodec/cbs_apv_syntax_template.c
+++ b/libavcodec/cbs_apv_syntax_template.c
@@ -236,6 +236,8 @@ static int FUNC(tile)(CodedBitstreamContext *ctx, RWContext *rw,
#ifdef READ
int pos = get_bits_count(rw);
av_assert0(pos % 8 == 0);
+ if (get_bits_left(rw) < 8LL * comp_size)
+ return AVERROR_INVALIDDATA;
current->tile_data[c] = (uint8_t*)align_get_bits(rw);
skip_bits_long(rw, 8 * comp_size);
#else
--
2.49.0
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prev parent reply other threads:[~2025-06-21 21:16 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-06-21 21:15 [FFmpeg-devel] [PATCH 1/5] avformat/mov: Check that sample_count is allocated in mov_parse_heif_items() Michael Niedermayer
2025-06-21 21:15 ` [FFmpeg-devel] [PATCH 2/5] avformat/mov: Check edit_list_dts_entry_end Michael Niedermayer
2025-06-21 21:15 ` [FFmpeg-devel] [PATCH 3/5] avcodec/rv60dec: Check sum in read_slice_sizes() Michael Niedermayer
2025-06-21 21:15 ` [FFmpeg-devel] [PATCH 4/5] avformat/iff: Check nb_channels == 0 in CHNL Michael Niedermayer
2025-06-21 21:15 ` Michael Niedermayer [this message]
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