Check asprintf() return to avoid crashing in strcmp().

ok deraadt millert

diff --git a/usr.bin/seq/seq.c b/usr.bin/seq/seq.c
index 9906829..e44b9df 100644 (file)
--- a/usr.bin/seq/seq.c
+++ b/usr.bin/seq/seq.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: seq.c,v 1.3 2022/02/22 16:14:38 rob Exp $     */
+/*     $OpenBSD: seq.c,v 1.4 2022/02/22 23:24:09 tb Exp $      */
 
 /*-
  * Copyright (c) 2005 The NetBSD Foundation, Inc.
@@ -195,8 +195,9 @@ main(int argc, char *argv[])
         * loop held true due to a rounding error and we still need to print
         * 'last'.
         */
-       asprintf(&cur_print, fmt, cur);
-       asprintf(&last_print, fmt, last);
+       if (asprintf(&cur_print, fmt, cur) == -1 ||
+           asprintf(&last_print, fmt, last) == -1)
+               err(1, "asprintf");
        if (strcmp(cur_print, last_print) == 0 && cur != last_shown_value) {
                if (cur != first)
                    fputs(sep, stdout);