From: Valerie Aurora <vaurora@xxxxxxxxxx>
---
fs/open.c | 23 ++++++++++++++++++++---
1 files changed, 20 insertions(+), 3 deletions(-)
diff --git a/fs/open.c b/fs/open.c
index 1ce2da3..8dca771 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -661,18 +661,35 @@ out:
SYSCALL_DEFINE3(lchown, const char __user *, filename, uid_t, user, gid_t, group)
{
struct path path;
+ struct nameidata nd;
+ struct vfsmount *mnt;
+ char *tmp;
int error;
- error = user_lpath(filename, &path);
+ error = user_path_nd(AT_FDCWD, filename, 0, &nd, &path, &tmp);
if (error)
goto out;
- error = mnt_want_write(path.mnt);
+
+ if (IS_DIR_UNIONED(nd.path.dentry))
+ mnt = nd.path.mnt;
+ else
+ mnt = path.mnt;
+
+ error = mnt_want_write(mnt);
if (error)
goto out_release;
+
+ error = union_copyup(&nd, &path);
+ if (error)
+ goto out_drop_write;
+
error = chown_common(&path, user, group);
- mnt_drop_write(path.mnt);
+out_drop_write:
+ mnt_drop_write(mnt);
out_release:
path_put(&path);
+ path_put(&nd.path);
+ putname(tmp);
out:
return error;
}
--
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