shithub: riscv

Info  •  Files  •  Log  •  Branches

libtags: wav: do not div by zero (fixup)

--- a/sys/src/cmd/audio/libtags/wav.c

+++ b/sys/src/cmd/audio/libtags/wav.c

@@ -19,7 +19,7 @@

 {

 	uchar *d;

 	int i, n, info;

-	u32int csz;

+	u32int csz, x;

 	uvlong sz;

 	d = (uchar*)ctx->buf;

@@ -59,9 +59,10 @@

 			csz -= 16;

 			ctx->channels = le16u(d+2);

 			ctx->samplerate = leuint(d+4);

-			if(ctx->channels < 1 || ctx->samplerate < 1)

+			x = leuint(d+8);

+			if(ctx->channels < 1 || ctx->samplerate < 1 || x < 1)

 				return -1;

-			ctx->duration = sz*1000 / leuint(d+8);

+			ctx->duration = sz*1000 / x;

 		}else if(memcmp(d, "LIST", 4) == 0){

 			sz = csz - 4;

 			continue;