Check the return value of fstat() in readmsg().

OK deraadt@ tedu@

diff --git a/usr.bin/signify/signify.c b/usr.bin/signify/signify.c
index 903d1a3..03d3886 100644 (file)
--- a/usr.bin/signify/signify.c
+++ b/usr.bin/signify/signify.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: signify.c,v 1.28 2014/01/10 17:52:50 deraadt Exp $ */
+/* $OpenBSD: signify.c,v 1.29 2014/01/11 04:29:07 lteo Exp $ */
 /*
  * Copyright (c) 2013 Ted Unangst <tedu@openbsd.org>
  *
@@ -168,7 +168,8 @@ readmsg(const char *filename, unsigned long long *msglenp)
        int fd;
 
        fd = xopen(filename, O_RDONLY | O_NOFOLLOW, 0);
-       fstat(fd, &sb);
+       if (fstat(fd, &sb) == -1)
+               err(1, "fstat on %s", filename);
        msglen = sb.st_size;
        if (msglen > (1UL << 30))
                errx(1, "msg too large in %s", filename);