From fcc263caa9e11a1f94431a6d356a48003c636ef6 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Fri, 23 Oct 2020 18:05:23 +0200 Subject: [PATCH] avformat/aaxdec: Check string before strcmp() Fixes: NULL ptr dereference Fixes: 26508/clusterfuzz-testcase-minimized-ffmpeg_dem_AAX_fuzzer-5694725249826816 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavformat/aaxdec.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavformat/aaxdec.c b/libavformat/aaxdec.c index 3db6e9bc6d..7d10e805ca 100644 --- a/libavformat/aaxdec.c +++ b/libavformat/aaxdec.c @@ -232,7 +232,7 @@ static int aax_read_header(AVFormatContext *s) int64_t col_offset; int flag, type; - if (strcmp(a->xcolumns[c].name, "data")) + if (!a->xcolumns[c].name || strcmp(a->xcolumns[c].name, "data")) continue; type = a->xcolumns[c].type;