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avcodec/vc2enc_dwt: Avoid NULL - 0

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It is sane, but UB. It could happen in case of allocation errors
in vc2_encode_init().

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt 2022-02-08 11:44:13 +01:00
parent fb36af3b66
commit 31da97b083
1 changed files with 4 additions and 2 deletions
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6
libavcodec/vc2enc_dwt.c
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@ -276,6 +276,8 @@ av_cold int ff_vc2enc_init_transforms(VC2TransformContext *s, int p_stride,
av_cold void ff_vc2enc_free_transforms(VC2TransformContext *s) av_cold void ff_vc2enc_free_transforms(VC2TransformContext *s)
{ {
av_free(s->buffer - s->padding); if (s->buffer) {
s->buffer = NULL; av_free(s->buffer - s->padding);
s->buffer = NULL;
}
} }