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avformat/assdec: make sure pos is initialized
Fixes use of uninitialized memory Fixes: signal_sigsegv_504fb0_10_signal_sigsegv_504fb0_343_mewmew_ssa.avi Found-by: Mateusz j00ru Jurczyk and Gynvael Coldwind
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@ -57,14 +57,14 @@ static int ass_read_close(AVFormatContext *s)
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static int read_dialogue(ASSContext *ass, AVBPrint *dst, const uint8_t *p,
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int64_t *start, int *duration)
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{
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int pos;
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int pos = 0;
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int64_t end;
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int hh1, mm1, ss1, ms1;
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int hh2, mm2, ss2, ms2;
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if (sscanf(p, "Dialogue: %*[^,],%d:%d:%d%*c%d,%d:%d:%d%*c%d,%n",
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&hh1, &mm1, &ss1, &ms1,
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&hh2, &mm2, &ss2, &ms2, &pos) >= 8) {
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&hh2, &mm2, &ss2, &ms2, &pos) >= 8 && pos > 0) {
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/* This is not part of the sscanf itself in order to handle an actual
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* number (which would be the Layer) or the form "Marked=N" (which is
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