From: Michael Niedermayer <michael@niedermayer.cc>
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
Subject: [FFmpeg-devel] [PATCH 2/5] avcodec/xpmdec: Check size before allocation to avoid truncation
Date: Fri, 13 Jan 2023 01:01:35 +0100
Message-ID: <20230113000138.9994-2-michael@niedermayer.cc> (raw)
In-Reply-To: <20230113000138.9994-1-michael@niedermayer.cc>
Fixes:OOM
Fixes:out of array access (no testcase)
Fixes: 48567/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_XPM_fuzzer-6573323838685184
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
libavcodec/xpmdec.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/libavcodec/xpmdec.c b/libavcodec/xpmdec.c
index ff1f51dd32..504cc47d8f 100644
--- a/libavcodec/xpmdec.c
+++ b/libavcodec/xpmdec.c
@@ -356,6 +356,9 @@ static int xpm_decode_frame(AVCodecContext *avctx, AVFrame *p,
size *= 4;
+ if (size > SIZE_MAX)
+ return AVERROR(ENOMEM);
+
ptr += mod_strcspn(ptr, ",") + 1;
if (end - ptr < 1)
return AVERROR_INVALIDDATA;
--
2.17.1
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next prev parent reply other threads:[~2023-01-13 0:02 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-13 0:01 [FFmpeg-devel] [PATCH 1/5] avcodec/wbmpdec: use remaining size not whole size Michael Niedermayer
2023-01-13 0:01 ` Michael Niedermayer [this message]
2023-01-13 0:11 ` [FFmpeg-devel] [PATCH 2/5] avcodec/xpmdec: Check size before allocation to avoid truncation James Almer
2023-01-13 20:49 ` Michael Niedermayer
2023-01-13 20:53 ` James Almer
2023-01-13 20:56 ` Michael Niedermayer
2023-01-13 0:01 ` [FFmpeg-devel] [PATCH 3/5] avcodec/012v: Order operations for odd size handling Michael Niedermayer
2023-01-16 8:19 ` Paul B Mahol
2023-01-13 0:01 ` [FFmpeg-devel] [PATCH 4/5] avcodec/motionpixels: Mask pixels to valid values Michael Niedermayer
2023-02-23 22:35 ` Michael Niedermayer
2023-01-13 0:01 ` [FFmpeg-devel] [PATCH 5/5] avcodec/sonic: avoid integer overflow on quantization parameter Michael Niedermayer
2023-01-13 10:15 ` Paul B Mahol
2023-01-15 2:44 ` [FFmpeg-devel] [PATCH 1/5] avcodec/wbmpdec: use remaining size not whole size Peter Ross
2023-01-15 17:12 ` Michael Niedermayer
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