From 1ab0f83b0a243c635d77f8b116646bb7594988d4 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Thu, 12 Jan 2023 21:23:21 +0100 Subject: [PATCH] avcodec/wbmpdec: use remaining size not whole size Fixes: out of array access Fixes: 48567/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_WBMP_fuzzer-6652634692190208 Fixes: 48567/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_WBMP_fuzzer-6653703453278208 Fixes: 48567/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_WBMP_fuzzer-6668020758216704 Fixes: 48567/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_WBMP_fuzzer-6684749875249152 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Reviewed-by: Peter Ross Signed-off-by: Michael Niedermayer --- libavcodec/wbmpdec.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/wbmpdec.c b/libavcodec/wbmpdec.c index 9638b55b94..8b105bc135 100644 --- a/libavcodec/wbmpdec.c +++ b/libavcodec/wbmpdec.c @@ -72,7 +72,7 @@ static int wbmp_decode_frame(AVCodecContext *avctx, AVFrame *p, if (p->linesize[0] == (width + 7) / 8) bytestream2_get_buffer(&gb, p->data[0], height * ((width + 7) / 8)); else - readbits(p->data[0], width, height, p->linesize[0], gb.buffer, gb.buffer_end - gb.buffer_start); + readbits(p->data[0], width, height, p->linesize[0], gb.buffer, gb.buffer_end - gb.buffer); p->key_frame = 1; p->pict_type = AV_PICTURE_TYPE_I;