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avcodec/flac_parser: Fix infinite loop

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Fixes: crbug/827204

Reported-by: Frank Liberato <liberato@google.com>
Reviewed-by: Frank Liberato <liberato@google.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2018-04-30 22:20:28 +02:00
parent 0ef7a45197
commit 15a2e35e9e
1 changed files with 7 additions and 2 deletions
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9
libavcodec/flac_parser.c
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@ -686,12 +686,17 @@ static int flac_parse(AVCodecParserContext *s, AVCodecContext *avctx,
} }
for (curr = fpc->headers; curr; curr = curr->next) { for (curr = fpc->headers; curr; curr = curr->next) {
if (curr->max_score > 0 && if (!fpc->best_header || curr->max_score > fpc->best_header->max_score) {
(!fpc->best_header || curr->max_score > fpc->best_header->max_score)) {
fpc->best_header = curr; fpc->best_header = curr;
} }
} }
if (fpc->best_header && fpc->best_header->max_score <= 0) {
// Only accept a bad header if there is no other option to continue
if (!buf_size || !buf || read_end != buf || fpc->nb_headers_buffered < FLAC_MIN_HEADERS)
fpc->best_header = NULL;
}
if (fpc->best_header) { if (fpc->best_header) {
fpc->best_header_valid = 1; fpc->best_header_valid = 1;
if (fpc->best_header->offset > 0) { if (fpc->best_header->offset > 0) {