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swscale/swscale: Add some sanity checks for srcSlice* parameters

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Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 321e85e1769ca1fc1567025ae264760790ee7fc9)

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2016-01-17 18:57:01 +01:00
parent f121ed611e
commit 6897859b5a
1 changed files with 8 additions and 0 deletions
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8
libswscale/swscale.c
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@ -1044,12 +1044,20 @@ int attribute_align_arg sws_scale(struct SwsContext *c,
const uint8_t *src2[4];
uint8_t *dst2[4];
uint8_t *rgb0_tmp = NULL;
int macro_height = isBayer(c->srcFormat) ? 2 : (1 << c->chrSrcVSubSample);
if (!srcStride || !dstStride || !dst || !srcSlice) {
av_log(c, AV_LOG_ERROR, "One of the input parameters to sws_scale() is NULL, please check the calling code\n");
return 0;
}
if ((srcSliceY & (macro_height-1)) ||
((srcSliceH& (macro_height-1)) && srcSliceY + srcSliceH != c->srcH) ||
srcSliceY + srcSliceH > c->srcH) {
av_log(c, AV_LOG_ERROR, "Slice parameters %d, %d are invalid\n", srcSliceY, srcSliceH);
return AVERROR(EINVAL);
}
if (c->gamma_flag && c->cascaded_context[0]) {