From 3a22bc03e6b1813a8388c39137150f322f9119f6 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Mon, 28 Mar 2022 20:27:20 +0200 Subject: [PATCH] avcodec/binkaudio: reset ch_offset on errors Fixes: NULL pointer dereference Fixes: 45955/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_BINKAUDIO_DCT_fuzzer-4842044192849920 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Reviewed-by: Paul B Mahol Signed-off-by: Michael Niedermayer --- libavcodec/binkaudio.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/libavcodec/binkaudio.c b/libavcodec/binkaudio.c index 56b58b57c8..c4f3e743e2 100644 --- a/libavcodec/binkaudio.c +++ b/libavcodec/binkaudio.c @@ -329,6 +329,7 @@ again: avctx->codec->id == AV_CODEC_ID_BINKAUDIO_DCT, FFMIN(MAX_CHANNELS, s->channels - s->ch_offset), s->ch_offset)) { av_log(avctx, AV_LOG_ERROR, "Incomplete packet\n"); + s->ch_offset = 0; return AVERROR_INVALIDDATA; } s->ch_offset += MAX_CHANNELS; @@ -347,6 +348,7 @@ again: return 0; fail: + s->ch_offset = 0; av_packet_unref(s->pkt); return ret; }