PR #20178 opened by michaelni URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/20178 Patch URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/20178.patch
Fixes: use of uninitialized memory Fixes: 42538134/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_ILBC_fuzzer-6322020827070464 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> >From eeef95e0999d2230361315b67620f81a4e370cbb Mon Sep 17 00:00:00 2001 From: Michael Niedermayer <mich...@niedermayer.cc> Date: Fri, 8 Aug 2025 15:03:56 +0200 Subject: [PATCH] avcodec/ilbcdec: Clear cbvec when used with create_augmented_vector() Fixes: use of uninitialized memory Fixes: 42538134/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_ILBC_fuzzer-6322020827070464 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> --- libavcodec/ilbcdec.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/libavcodec/ilbcdec.c b/libavcodec/ilbcdec.c index a9dfa857a2..b218ca323a 100644 --- a/libavcodec/ilbcdec.c +++ b/libavcodec/ilbcdec.c @@ -675,6 +675,7 @@ static void get_codebook(int16_t * cbvec, /* (o) Constructed codebook vector * /* get vector */ memcpy(cbvec, mem + lMem - k, cbveclen * 2); } else if (index < base_size) { + memset(cbvec, 0, cbveclen*2); /* Calculate lag */ @@ -701,6 +702,7 @@ static void get_codebook(int16_t * cbvec, /* (o) Constructed codebook vector * filter_mafq12(&mem[memIndTest + 4], cbvec, kCbFiltersRev, CB_FILTERLEN, cbveclen); } else { + memset(cbvec, 0, cbveclen*2); /* interpolated vectors */ /* Stuff zeros outside memory buffer */ memIndTest = lMem - cbveclen - CB_FILTERLEN; -- 2.49.1 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
