From: Greg Kroah-Hartman gregkh@linuxfoundation.org
From: Ondrej Mosnacek omosnace@redhat.com
[ Upstream commit 53cb245454df5b13d7063162afd7a785aed6ebf2 ]
An xattr 'get' handler is expected to return the length of the value on success, yet _nfs4_get_security_label() (and consequently also nfs4_xattr_get_nfs4_label(), which is used as an xattr handler) returns just 0 on success.
Fix this by returning label.len instead, which contains the length of the result.
Fixes: aa9c2669626c ("NFS: Client implementation of Labeled-NFS") Signed-off-by: Ondrej Mosnacek omosnace@redhat.com Reviewed-by: James Morris jamorris@linux.microsoft.com Reviewed-by: Paul Moore paul@paul-moore.com Signed-off-by: Anna Schumaker Anna.Schumaker@Netapp.com Signed-off-by: Sasha Levin sashal@kernel.org --- fs/nfs/nfs4proc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index fc8bbfd9beb3..7eb44f37558c 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -5972,7 +5972,7 @@ static int _nfs4_get_security_label(struct inode *inode, void *buf, return ret; if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL)) return -ENOENT; - return 0; + return label.len; }
static int nfs4_get_security_label(struct inode *inode, void *buf,