linux-kernel - [PATCH v2 07/10] ovl: do not fail when setting origin xattr

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Message-Id: <20201207163255.564116-8-mszeredi@redhat.com>
Date:   Mon,  7 Dec 2020 17:32:52 +0100
From:   Miklos Szeredi <mszeredi@...hat.com>
To:     "Eric W . Biederman" <ebiederm@...ssion.com>
Cc:     linux-fsdevel@...r.kernel.org, linux-unionfs@...r.kernel.org,
        linux-security-module@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 07/10] ovl: do not fail when setting origin xattr

Comment above call already says this, but only EOPNOTSUPP is ignored, other
failures are not.

For example setting "user.*" will fail with EPERM on symlink/special.

Ignore this error as well.

Signed-off-by: Miklos Szeredi <mszeredi@...hat.com>
---
 fs/overlayfs/copy_up.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/overlayfs/copy_up.c b/fs/overlayfs/copy_up.c
index 955ecd4030f0..8a7ef40d98f8 100644
--- a/fs/overlayfs/copy_up.c
+++ b/fs/overlayfs/copy_up.c
@@ -352,7 +352,8 @@ int ovl_set_origin(struct dentry *dentry, struct dentry *lower,
 				 fh ? fh->fb.len : 0, 0);
 	kfree(fh);
 
-	return err;
+	/* Ignore -EPERM from setting "user.*" on symlink/special */
+	return err == -EPERM ? 0 : err;
 }
 
 /* Store file handle of @upper dir in @index dir entry */
-- 
2.26.2