cmd: use safe number parsers in lxc-usernsexec

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

diff --git a/src/lxc/cmd/lxc_usernsexec.c b/src/lxc/cmd/lxc_usernsexec.c
index a2c51800569eed6db22265862407264bb55eede5..4909a93244ba3b69b05a3e56e971fb1ccb6b6d5c 100644 (file)
--- a/src/lxc/cmd/lxc_usernsexec.c
+++ b/src/lxc/cmd/lxc_usernsexec.c
@@ -196,6 +196,7 @@ static int parse_map(char *map)
  */
 static int read_default_map(char *fnam, int which, char *user)
 {
+       int ret;
        size_t len;
        char *p1, *p2;
        FILE *fin;
@@ -228,8 +229,20 @@ static int read_default_map(char *fnam, int which, char *user)
                        return -1;
                }
 
-               newmap->hostid = atol(p1 + 1);
-               newmap->range = atol(p2 + 1);
+               ret = lxc_safe_ulong(p1 + 1, &newmap->hostid);
+               if (ret < 0) {
+                       fclose(fin);
+                       free(line);
+                       return -1;
+               }
+
+               ret = lxc_safe_ulong(p2 + 1, &newmap->range);
+               if (ret < 0) {
+                       fclose(fin);
+                       free(line);
+                       return -1;
+               }
+
                newmap->nsid = 0;
                newmap->idtype = which;