[FFmpeg-cvslog] avfilter/af_pan: Fix sscanf() use

[Michael Niedermayer]

ffmpeg | branch: release/4.2 | Michael Niedermayer <michael at niedermayer.cc> | Mon Jan  6 22:01:39 2025 +0100| [6b43edeb24e4e7cbf4c85c94a86be7333a844f65] | committer: Michael Niedermayer

avfilter/af_pan: Fix sscanf() use

Fixes: Memory Data Leak

Found-by: Simcha Kosman <simcha.kosman at cyberark.com>
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit b5b6391d64807578ab872dc58fb8aa621dcfc38a)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=6b43edeb24e4e7cbf4c85c94a86be7333a844f65
---

 libavfilter/af_pan.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavfilter/af_pan.c b/libavfilter/af_pan.c
index 10064ddb6b..c601d5b53a 100644
--- a/libavfilter/af_pan.c
+++ b/libavfilter/af_pan.c
@@ -186,7 +186,7 @@ static av_cold int init(AVFilterContext *ctx)
         sign = 1;
         while (1) {
             gain = 1;
-            if (sscanf(arg, "%lf%n *%n", &gain, &len, &len))
+            if (sscanf(arg, "%lf%n *%n", &gain, &len, &len) >= 1)
                 arg += len;
             if (parse_channel_name(&arg, &in_ch_id, &named)){
                 av_log(ctx, AV_LOG_ERROR,