[FFmpeg-cvslog] avfilter/vf_v360: Fix NULL pointer use

[Michael Niedermayer]

ffmpeg | branch: release/7.1 | Michael Niedermayer <michael at niedermayer.cc> | Wed Jan  8 03:11:02 2025 +0100| [75385a729f6c4b8a47e4cc1fe4717172982efad2] | committer: Michael Niedermayer

avfilter/vf_v360: Fix NULL pointer use

Fixes: applying zero offset to null pointer
partly Fixes: verysmall.flv

Found-by: Elias Myllymäki <elias.myllymaki04p at gmail.com>
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit 66e9888bf418984a274beddbc3e87e9f1b8f5077)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=75385a729f6c4b8a47e4cc1fe4717172982efad2
---

 libavfilter/vf_v360.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libavfilter/vf_v360.c b/libavfilter/vf_v360.c
index 12e40205ba..4ba389e335 100644
--- a/libavfilter/vf_v360.c
+++ b/libavfilter/vf_v360.c
@@ -4255,8 +4255,8 @@ static int v360_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
                 int16_t *u = r->u[p] + ((j - slice_start) * uv_linesize + i) * elements;
                 int16_t *v = r->v[p] + ((j - slice_start) * uv_linesize + i) * elements;
                 int16_t *ker = r->ker[p] + ((j - slice_start) * uv_linesize + i) * elements;
-                uint8_t *mask8 = p ? NULL : r->mask + ((j - slice_start) * s->pr_width[0] + i);
-                uint16_t *mask16 = p ? NULL : (uint16_t *)r->mask + ((j - slice_start) * s->pr_width[0] + i);
+                uint8_t  *mask8  = (p || !r->mask) ? NULL : r->mask + ((j - slice_start) * s->pr_width[0] + i);
+                uint16_t *mask16 = (p || !r->mask) ? NULL : (uint16_t *)r->mask + ((j - slice_start) * s->pr_width[0] + i);
                 int in_mask, out_mask;
 
                 if (s->out_transpose)