From 7e9e7cb3b65167f37dcbfcf6a2ee308548af4e73 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sun, 3 Aug 2025 14:44:04 +0200 Subject: [PATCH] avcodec/iff: Clear ham_buf Fixes: use of uninitialized memory Fixes: 423673969/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_IFF_ILBM_fuzzer-6651797156724736 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavcodec/iff.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/iff.c b/libavcodec/iff.c index 13010b451e..66839c3c39 100644 --- a/libavcodec/iff.c +++ b/libavcodec/iff.c @@ -279,7 +279,7 @@ static int extract_header(AVCodecContext *const avctx, if (avctx->codec_tag == MKTAG('P', 'B', 'M', ' ') && s->ham == 4) extra_space = 4; - s->ham_buf = av_malloc((s->planesize * 8) + AV_INPUT_BUFFER_PADDING_SIZE); + s->ham_buf = av_mallocz((s->planesize * 8) + AV_INPUT_BUFFER_PADDING_SIZE); if (!s->ham_buf) return AVERROR(ENOMEM);