[PATCH 4.19 011/115] afs: Fix SELinux setting security label on /afs

From: Greg Kroah-Hartman
Date: Tue Jan 07 2020 - 16:17:38 EST

From: David Howells <dhowells@xxxxxxxxxx>

[ Upstream commit bcbccaf2edcf1b76f73f890e968babef446151a4 ]

Make the AFS dynamic root superblock R/W so that SELinux can set the
security label on it. Without this, upgrades to, say, the Fedora
filesystem-afs RPM fail if afs is mounted on it because the SELinux label
can't be (re-)applied.

It might be better to make it possible to bypass the R/O check for LSM
label application through setxattr.

Fixes: 4d673da14533 ("afs: Support the AFS dynamic root")
Signed-off-by: David Howells <dhowells@xxxxxxxxxx>
Reviewed-by: Marc Dionne <marc.dionne@xxxxxxxxxxxx>
cc: selinux@xxxxxxxxxxxxxxx
cc: linux-security-module@xxxxxxxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
fs/afs/super.c | 1 -
1 file changed, 1 deletion(-)

diff --git a/fs/afs/super.c b/fs/afs/super.c
index 4d3e274207fb..bd2608297473 100644
--- a/fs/afs/super.c
+++ b/fs/afs/super.c
@@ -404,7 +404,6 @@ static int afs_fill_super(struct super_block *sb,
/* allocate the root inode and dentry */
if (as->dyn_root) {
inode = afs_iget_pseudo_dir(sb, true);
- sb->s_flags |= SB_RDONLY;
} else {
sprintf(sb->s_id, "%u", as->volume->vid);