From 70b589a37e1aba892c1e5d41957b0042f9eb031b Mon Sep 17 00:00:00 2001 From: Eric Sandeen Date: Sat, 9 Jul 2022 10:56:02 -0700 Subject: [PATCH] xfs: add selinux labels to whiteout inodes We got a report that "renameat2() with flags=RENAME_WHITEOUT doesn't apply an SELinux label on xfs" as it does on other filesystems (for example, ext4 and tmpfs.) While I'm not quite sure how labels may interact w/ whiteout files, leaving them as unlabeled seems inconsistent at best. Now that xfs_init_security is not static, rename it to xfs_inode_init_security per dchinner's suggestion. Signed-off-by: Eric Sandeen Reviewed-by: Dave Chinner Reviewed-by: Darrick J. Wong Signed-off-by: Darrick J. Wong --- fs/xfs/xfs_inode.c | 14 +++++++++++++- fs/xfs/xfs_iops.c | 11 +++++------ fs/xfs/xfs_iops.h | 3 +++ 3 files changed, 21 insertions(+), 7 deletions(-) diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c index 482e1ee2d669..296e253bcfcd 100644 --- a/fs/xfs/xfs_inode.c +++ b/fs/xfs/xfs_inode.c @@ -3032,10 +3032,12 @@ out_trans_abort: static int xfs_rename_alloc_whiteout( struct user_namespace *mnt_userns, + struct xfs_name *src_name, struct xfs_inode *dp, struct xfs_inode **wip) { struct xfs_inode *tmpfile; + struct qstr name; int error; error = xfs_create_tmpfile(mnt_userns, dp, S_IFCHR | WHITEOUT_MODE, @@ -3043,6 +3045,15 @@ xfs_rename_alloc_whiteout( if (error) return error; + name.name = src_name->name; + name.len = src_name->len; + error = xfs_inode_init_security(VFS_I(tmpfile), VFS_I(dp), &name); + if (error) { + xfs_finish_inode_setup(tmpfile); + xfs_irele(tmpfile); + return error; + } + /* * Prepare the tmpfile inode as if it were created through the VFS. * Complete the inode setup and flag it as linkable. nlink is already @@ -3093,7 +3104,8 @@ xfs_rename( * appropriately. */ if (flags & RENAME_WHITEOUT) { - error = xfs_rename_alloc_whiteout(mnt_userns, target_dp, &wip); + error = xfs_rename_alloc_whiteout(mnt_userns, src_name, + target_dp, &wip); if (error) return error; diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c index 29f5b8b8aca6..6720b60f88cf 100644 --- a/fs/xfs/xfs_iops.c +++ b/fs/xfs/xfs_iops.c @@ -75,9 +75,8 @@ xfs_initxattrs( * these attrs can be journalled at inode creation time (along with the * inode, of course, such that log replay can't cause these to be lost). */ - -STATIC int -xfs_init_security( +int +xfs_inode_init_security( struct inode *inode, struct inode *dir, const struct qstr *qstr) @@ -122,7 +121,7 @@ xfs_cleanup_inode( /* Oh, the horror. * If we can't add the ACL or we fail in - * xfs_init_security we must back out. + * xfs_inode_init_security we must back out. * ENOSPC can hit here, among other things. */ xfs_dentry_to_name(&teardown, dentry); @@ -208,7 +207,7 @@ xfs_generic_create( inode = VFS_I(ip); - error = xfs_init_security(inode, dir, &dentry->d_name); + error = xfs_inode_init_security(inode, dir, &dentry->d_name); if (unlikely(error)) goto out_cleanup_inode; @@ -424,7 +423,7 @@ xfs_vn_symlink( inode = VFS_I(cip); - error = xfs_init_security(inode, dir, &dentry->d_name); + error = xfs_inode_init_security(inode, dir, &dentry->d_name); if (unlikely(error)) goto out_cleanup_inode; diff --git a/fs/xfs/xfs_iops.h b/fs/xfs/xfs_iops.h index 278949056048..cb5fc68c9ea0 100644 --- a/fs/xfs/xfs_iops.h +++ b/fs/xfs/xfs_iops.h @@ -17,4 +17,7 @@ extern void xfs_setattr_time(struct xfs_inode *ip, struct iattr *iattr); int xfs_vn_setattr_size(struct user_namespace *mnt_userns, struct dentry *dentry, struct iattr *vap); +int xfs_inode_init_security(struct inode *inode, struct inode *dir, + const struct qstr *qstr); + #endif /* __XFS_IOPS_H__ */