commit f9b29451e422e672595e95eefd03879a4398a1f6
author Michael Niedermayer <michael@niedermayer.cc> Thu Jun 29 23:24:20 2023
committer Michael Niedermayer <michael@niedermayer.cc> Sat Jul 22 15:05:47 2023
tree 321bce6da0615146ce8b79730bbabd6fcd18ef05
parent 167b4f56f187edafd94fa2e706897ac3bb450511

avcodec/rka: Fix integer overflow in decode_filter()

Fixes: signed integer overflow: 2147443649 + 65535 cannot be represented in type 'int'
Fixes: 60054/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_RKA_fuzzer-5095674572832768

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

libavcodec/rka.c

diff --git a/libavcodec/rka.c b/libavcodec/rka.c
index d56f4fa..7646d77 100644
--- a/libavcodec/rka.c
+++ b/libavcodec/rka.c
@@ -745,7 +745,7 @@
                 }
                 ctx->buf1[off] = sum - ctx->buf0[off + -1];
                 ctx->buf0[off] = sum;
-                m += FFABS(ctx->buf1[off]);
+                m += (unsigned)FFABS(ctx->buf1[off]);
             }
         }
         if (ctx->cmode2 != 0) {