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avcodec/lagarith: disable lag_decode_zero_run_line() and ask for a sample

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The code seems to have never been tested
fixing it should be quite easy but needs a sample/testcase

Fixes use of uninitialized memory
Fixes: msan_uninit-mem_7f9a862dfabf_413_2889_assassin_OL.avi
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-12-29 22:58:38 +01:00
parent 9ed640015b
commit 100a54da52
1 changed files with 3 additions and 0 deletions
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3
libavcodec/lagarith.c
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@ -369,6 +369,9 @@ static int lag_decode_zero_run_line(LagarithContext *l, uint8_t *dst,
uint8_t mask2 = -(esc_count < 3); uint8_t mask2 = -(esc_count < 3);
uint8_t *end = dst + (width - 2); uint8_t *end = dst + (width - 2);
avpriv_request_sample(l->avctx, "zero_run_line");
return AVERROR_PATCHWELCOME;
output_zeros: output_zeros:
if (l->zeros_rem) { if (l->zeros_rem) {
count = FFMIN(l->zeros_rem, width - i); count = FFMIN(l->zeros_rem, width - i);