readlink: realpath requires PATH_MAX, bb_common_bufsiz1 can be too small

umount: don't actually need char[2 * PATH_MAX] for realpath

1 files changed, 2 insertions, 2 deletions

diff --git a/util-linux/umount.c b/util-linux/umount.c
index 17d88b388..7c1b81347 100644
--- a/util-linux/umount.c
+++ b/util-linux/umount.c
@@ -25,7 +25,7 @@ int umount_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 int umount_main(int argc, char **argv)
 {
         int doForce;
-        char path[2*PATH_MAX];
+        char path[PATH_MAX + 2];
         struct mntent me;
         FILE *fp;
         char *fstype = 0;
@@ -89,7 +89,7 @@ int umount_main(int argc, char **argv)
 
                 // Do we already know what to umount this time through the loop?
                 if (m)
-                        safe_strncpy(path, m->dir, PATH_MAX);
+                        safe_strncpy(path, m->dir, sizeof(path));
                 // For umount -a, end of mtab means time to exit.
                 else if (opt & OPT_ALL)
                         break;