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libavcodec/png_parser.c: fix a use_of_uninitialized_value in target_dec_fuzzer. 

the target_dec_fuzzer is checking for the avpkt.data pointer but if the
png parser cannot combine the frame, the poutbuf is not set.

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Thierry Foucu 2020-06-04 13:03:00 -07:00 committed by Michael Niedermayer
parent cf28521fee
commit d5422a14e2
1 changed files with 1 additions and 0 deletions
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libavcodec/png_parser.c
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@ -45,6 +45,7 @@ static int png_parse(AVCodecParserContext *s, AVCodecContext *avctx,
s->pict_type = AV_PICTURE_TYPE_NONE;
*poutbuf_size = 0;
*poutbuf = NULL;
if (!ppc->pc.frame_start_found) {
uint64_t state64 = ppc->pc.state64;