fusermount: drop privileges for chdir()

cd to mountpoint's parent directory using unprivileged rather than
privileged access. This is to ensure that unmount works on mountpoints
where root may not have privileged access.

Fixes: #376

diff --git a/util/fusermount.c b/util/fusermount.c
index e6ac792ec02d86feec662be304a06f9e0cf57e94..3f13e4235ccd94a37440b9a94a717588ea4f427c 100644 (file)
--- a/util/fusermount.c
+++ b/util/fusermount.c
@@ -428,7 +428,9 @@ static int unmount_fuse_locked(const char *mnt, int quiet, int lazy)
                return -1;
        }
 
+       drop_privs();
        res = chdir_to_parent(copy, &last);
+       restore_privs();
        if (res == -1)
                goto out;