Handle filelength() possibly returning negative value

CID 349724

Handle filelength() possibly returning negative value
CID 349724
b1bb5630 · Rob Swindell · aeecca16 · b1bb5630
Commit b1bb5630 authored Feb 24, 2022 by Rob Swindell 💬
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src/sbbs3/userdat.c src/sbbs3/userdat.c +1 -1

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--- a/src/sbbs3/userdat.c
+++ b/src/sbbs3/userdat.c
@@ -1457,7 +1457,7 @@ char* readsmsg(scfg_t* cfg, int usernumber)
 	if((file=nopen(str,O_RDWR))==-1)
 		return(NULL);
 	length=(long)filelength(file);
-	if((buf=(char *)malloc(length+1))==NULL) {
+	if(length < 0 || (buf=(char *)malloc(length+1))==NULL) {
 		close(file);
 		return(NULL);
 	}