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lavc/pngenc: check malloc fail before using the pointer

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Need to check malloc fail before using the pointer

Signed-off-by: Jun Zhao <barryjzhao@tencent.com>
pull/311/head
Jun Zhao 6 years ago
parent 64e610b5f4
commit 1cc7e2630f
1 changed files with 1 additions and 1 deletions
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  1. 2
      libavcodec/pngenc.c

2
libavcodec/pngenc.c
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@ -748,11 +748,11 @@ static int apng_encode_frame(AVCodecContext *avctx, const AVFrame *pict,
original_bytestream_end = s->bytestream_end; original_bytestream_end = s->bytestream_end;
temp_bytestream = av_malloc(original_bytestream_end - original_bytestream); temp_bytestream = av_malloc(original_bytestream_end - original_bytestream);
temp_bytestream_end = temp_bytestream + (original_bytestream_end - original_bytestream);
if (!temp_bytestream) { if (!temp_bytestream) {
ret = AVERROR(ENOMEM); ret = AVERROR(ENOMEM);
goto fail; goto fail;
} }
temp_bytestream_end = temp_bytestream + (original_bytestream_end - original_bytestream);
for (last_fctl_chunk.dispose_op = 0; last_fctl_chunk.dispose_op < 3; ++last_fctl_chunk.dispose_op) { for (last_fctl_chunk.dispose_op = 0; last_fctl_chunk.dispose_op < 3; ++last_fctl_chunk.dispose_op) {
// 0: APNG_DISPOSE_OP_NONE // 0: APNG_DISPOSE_OP_NONE

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