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avformat/aaxdec: Check string before strcmp()

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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 <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2020-10-23 18:05:23 +02:00
parent 7186ec88b9
commit fcc263caa9
1 changed files with 1 additions and 1 deletions
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libavformat/aaxdec.c
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@ -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;