[FFmpeg-cvslog] libpostproc: check minimum size

[Michael Niedermayer]

ffmpeg | branch: release/7.1 | Michael Niedermayer <michael at niedermayer.cc> | Thu May  1 21:20:31 2025 +0200| [ba06c473ba2e495e68a8cfab781eed257e76e470] | committer: Michael Niedermayer

libpostproc: check minimum size

Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit 917c15435ae2e11a90de5d1a1153405bd3686fbe)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=ba06c473ba2e495e68a8cfab781eed257e76e470
---

 libpostproc/postprocess.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/libpostproc/postprocess.c b/libpostproc/postprocess.c
index 015bc9d501..c7f18c09e6 100644
--- a/libpostproc/postprocess.c
+++ b/libpostproc/postprocess.c
@@ -898,6 +898,11 @@ void  pp_postprocess(const uint8_t * src[3], const int srcStride[3],
     int minStride= FFMAX(FFABS(srcStride[0]), FFABS(dstStride[0]));
     int absQPStride = FFABS(QPStride);
 
+    if (width < 16 || height < 16) {
+        av_log(c, AV_LOG_ERROR, "Postproc is designed to filter 16x16 macroblock based formats, the minimum size is 1 macroblock\n");
+        return;
+    }
+
     // c->stride and c->QPStride are always positive
     if(c->stride < minStride || c->qpStride < absQPStride)
         reallocBuffers(c, width, height,