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Date: Tue, 6 Mar 2012 16:18:06 +0000 From: Andy Whitcroft <apw@...onical.com> To: Miklos Szeredi <miklos@...redi.hu>, Andy Whitcroft <apw@...onical.com> Cc: linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org, mszeredi@...e.cz Subject: [PATCH 2/2] overlayfs: switch to use inode_only_permissions When checking permissions on an overlayfs inode we do not take into account either device cgroup restrictions nor security permissions. This allows a user to mount an overlayfs layer over a restricted device directory and by pass those permissions to open otherwise restricted files. Switch over to the newly introduced inode_only_permissions. Signed-off-by: Andy Whitcroft <apw@...onical.com> --- fs/overlayfs/inode.c | 5 +---- 1 files changed, 1 insertions(+), 4 deletions(-) diff --git a/fs/overlayfs/inode.c b/fs/overlayfs/inode.c index ba1a777..1e3d157 100644 --- a/fs/overlayfs/inode.c +++ b/fs/overlayfs/inode.c @@ -114,10 +114,7 @@ int ovl_permission(struct inode *inode, int mask) goto out_dput; } - if (realinode->i_op->permission) - err = realinode->i_op->permission(realinode, mask); - else - err = generic_permission(realinode, mask); + err = inode_only_permission(realinode, mask); out_dput: dput(alias); return err; -- 1.7.9 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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