From: Michael Niedermayer <michael@niedermayer.cc>
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
Subject: [FFmpeg-devel] [PATCH 4/5] avcodec/hdrdec: Update w in inner loop of decompress()
Date: Sun, 11 Sep 2022 16:27:20 +0200
Message-ID: <20220911142721.30812-4-michael@niedermayer.cc> (raw)
In-Reply-To: <20220911142721.30812-1-michael@niedermayer.cc>
Fixes: out of array access
Fixes: 50936/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_HDR_fuzzer-5423041009549312
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
libavcodec/hdrdec.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavcodec/hdrdec.c b/libavcodec/hdrdec.c
index 9b262f2ef2c..7727826e2a5 100644
--- a/libavcodec/hdrdec.c
+++ b/libavcodec/hdrdec.c
@@ -70,8 +70,8 @@ static int decompress(uint8_t *scanline, int w, GetByteContext *gb, const uint8_
for (int i = run << rshift; i > 0 && w > 0 && scanline >= start + 4; i--) {
memcpy(scanline, scanline - 4, 4);
scanline += 4;
+ w -= 4;
}
- w -= run << rshift;
rshift += 8;
if (rshift > 16)
break;
--
2.17.1
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next prev parent reply other threads:[~2022-09-11 14:27 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-11 14:27 [FFmpeg-devel] [PATCH 1/5] avformat/mxfdec: Avoid some redundant writing to tables in mxf_compute_ptses_fake_index() Michael Niedermayer
2022-09-11 14:27 ` [FFmpeg-devel] [PATCH 2/5] avcodec/wavpack: Fix overflow in k=31 Michael Niedermayer
2022-11-30 20:25 ` Michael Niedermayer
2022-11-30 20:39 ` Paul B Mahol
2022-12-01 19:56 ` Michael Niedermayer
2022-12-02 16:14 ` Paul B Mahol
2022-12-02 23:11 ` Michael Niedermayer
2022-09-11 14:27 ` [FFmpeg-devel] [PATCH 3/5] avcodec/wavpack: Check for end of input in wv_unpack_dsd_high() Michael Niedermayer
2022-11-30 20:27 ` Michael Niedermayer
2022-09-11 14:27 ` Michael Niedermayer [this message]
2022-09-16 18:37 ` [FFmpeg-devel] [PATCH 4/5] avcodec/hdrdec: Update w in inner loop of decompress() Michael Niedermayer
2022-09-11 14:27 ` [FFmpeg-devel] [PATCH 5/5] tools/target_dec_fuzzer: Adjust threshold for Jpeg2000 Michael Niedermayer
2022-09-16 18:51 ` Michael Niedermayer
2022-09-20 11:12 ` [FFmpeg-devel] [PATCH 1/5] avformat/mxfdec: Avoid some redundant writing to tables in mxf_compute_ptses_fake_index() Tomas Härdin
2022-09-22 15:02 ` Michael Niedermayer
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