avcodec/sanm: Reset sizes in destroy_buffers()

avcodec/sanm: Reset sizes in destroy_buffers()

Fixes crash in 1288a2fe8e9ae6b00ca40e089d08ca65_signal_sigsegv_7ffff71426a7_354_accident.san with allocation limit 65536

Found-by: Samuel Groß, Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Gbp-Pq: Name CVE-2015-6822.patch

diff --git a/libavcodec/sanm.c b/libavcodec/sanm.c
index 41c65510e517e541a578a365c9cdfdb3f3d30ce5..c939fb216f7ddf2b113e1933d7b9e975f7c1ee0f 100644 (file)
--- a/libavcodec/sanm.c
+++ b/libavcodec/sanm.c
@@ -406,6 +406,7 @@ static void destroy_buffers(SANMVideoContext *ctx)
     ctx->frm0_size =
     ctx->frm1_size =
     ctx->frm2_size = 0;
+    init_sizes(ctx, 0, 0);
 }
 
 static av_cold int init_buffers(SANMVideoContext *ctx)