From eba5c78b217d29f8e5ad7238b3b3b16d2e3edaaf Mon Sep 17 00:00:00 2001
From: Ernestas Kulik <ekulik@redhat.com>
Date: Wed, 29 May 2019 09:12:01 +0200
Subject: [PATCH] lib: xatonum: Bail out with null strings

Signed-off-by: Ernestas Kulik <ekulik@redhat.com>
---
 src/lib/xatonum.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/lib/xatonum.c b/src/lib/xatonum.c
index 71b0247..c00b601 100644
--- a/src/lib/xatonum.c
+++ b/src/lib/xatonum.c
@@ -28,6 +28,9 @@ unsigned xatou(const char *numstr)
     int old_errno;
     char *e;
 
+    if (NULL == numstr)
+        error_msg_and_die("converting null string to integer");
+
     if (*numstr < '0' || *numstr > '9')
         goto inval;
 
@@ -46,6 +49,10 @@ inval:
 int xatoi_positive(const char *numstr)
 {
     unsigned r = xatou(numstr);
+
+    if (NULL == numstr)
+        error_msg_and_die("converting null string to integer");
+
     if (r > (unsigned)INT_MAX)
         error_msg_and_die("invalid number '%s'", numstr);
     return r;
@@ -55,6 +62,9 @@ int xatoi(const char *numstr)
 {
     unsigned r;
 
+    if (NULL == numstr)
+        error_msg_and_die("converting null string to integer");
+
     if (*numstr != '-')
         return xatoi_positive(numstr);
 
-- 
2.21.0