fix: Crash with invalid v2m file

Sound-Linux-More · May 12, 2022 · fd280a4 · fd280a4
1 parent f42f1b4
commit fd280a4
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/src/v2mconv.cpp b/src/v2mconv.cpp
@@ -22,13 +22,19 @@ static ssbase readfile(const unsigned char *inptr, const int inlen)
     ssbase base;
     memset(&base, 0, sizeof(base));
 
+    if (inlen < 12) return base;
+
     base.timediv  = (*((uint32_t*)(d)));
     base.timediv2 = 10000*base.timediv;
     base.maxtime  = *((uint32_t*)(d + 4));
     base.gdnum    = *((uint32_t*)(d + 8));
+
     d += 12;
     base.gptr = d;
+
+    if (inlen  - 12 < 10*base.gdnum) return base;
     d += 10*base.gdnum;
+
     for (int ch = 0; ch < 16; ch++)
     {
         ssbase::_basech &c = base.chan[ch];