[FFmpeg-devel] [PATCH 2/2] Add validity checks for the unsharp filter.

[Stefano Sabatini]

Prevent crash.
---
 libavfilter/vf_unsharp.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/libavfilter/vf_unsharp.c b/libavfilter/vf_unsharp.c
index fa62275..e7bf953 100644
--- a/libavfilter/vf_unsharp.c
+++ b/libavfilter/vf_unsharp.c
@@ -133,6 +133,13 @@ static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque)
         sscanf(args, "%d:%d:%lf:%d:%d:%lf", &lmsize_x, &lmsize_y, &lamount,
                                             &cmsize_x, &cmsize_y, &camount);
 
+    if (lmsize_x < 2 || lmsize_y < 2 || cmsize_x < 2 || cmsize_y < 2) {
+        av_log(ctx, AV_LOG_ERROR,
+               "Invalid value <2 for lmsize_x:%d or lmsize_y:%d or cmsize_x:%d or cmsize_y:%d\n",
+               lmsize_x, lmsize_y, cmsize_x, cmsize_y);
+        return AVERROR(EINVAL);
+    }
+
     set_filter_param(&unsharp->luma,   lmsize_x, lmsize_y, lamount);
     set_filter_param(&unsharp->chroma, cmsize_x, cmsize_y, camount);
 
-- 
1.7.1