diff --git a/libavcodec/rv60dec.c b/libavcodec/rv60dec.c
index 76caa6a361..2a7c5c1147 100644
--- a/libavcodec/rv60dec.c
+++ b/libavcodec/rv60dec.c
@@ -395,14 +395,14 @@ static int read_frame_header(RV60Context *s, GetBitContext *gb, int * width, int
 static int read_slice_sizes(RV60Context *s, GetBitContext *gb)
 {
     int nbits = get_bits(gb, 5) + 1;
-    int last_size;
+    int64_t last_size;
 
     for (int i = 0; i < s->cu_height; i++)
         s->slice[i].sign = get_bits1(gb);
 
     s->slice[0].size = last_size = get_bits_long(gb, nbits);
 
-    if (last_size < 0)
+    if (last_size < 0 || last_size > INT32_MAX)
         return AVERROR_INVALIDDATA;
 
     for (int i = 1; i < s->cu_height; i++) {
@@ -411,7 +411,7 @@ static int read_slice_sizes(RV60Context *s, GetBitContext *gb)
             last_size += diff;
         else
             last_size -= diff;
-        if (last_size <= 0)
+        if (last_size <= 0 || last_size > INT32_MAX)
             return AVERROR_INVALIDDATA;
         s->slice[i].size = last_size;
     }