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-rw-r--r--fs/d_path.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/fs/d_path.c b/fs/d_path.c
index 0f1fc1743302..a69e2cd36e6e 100644
--- a/fs/d_path.c
+++ b/fs/d_path.c
@@ -102,6 +102,8 @@ restart:
if (dentry == vfsmnt->mnt_root || IS_ROOT(dentry)) {
struct mount *parent = READ_ONCE(mnt->mnt_parent);
+ struct mnt_namespace *mnt_ns;
+
/* Escaped? */
if (dentry != vfsmnt->mnt_root) {
bptr = *buffer;
@@ -116,7 +118,9 @@ restart:
vfsmnt = &mnt->mnt;
continue;
}
- if (is_mounted(vfsmnt) && !is_anon_ns(mnt->mnt_ns))
+ mnt_ns = READ_ONCE(mnt->mnt_ns);
+ /* open-coded is_mounted() to use local mnt_ns */
+ if (!IS_ERR_OR_NULL(mnt_ns) && !is_anon_ns(mnt_ns))
error = 1; // absolute root
else
error = 2; // detached or not attached yet