This is a note to let you know that I've just added the patch titled
cifs: Do not use the original cruid when following DFS links for multiuser mounts
to the 5.13-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
cifs-do-not-use-the-original-cruid-when-following-dfs-links-for-multiuser-mounts.patch
and it can be found in the queue-5.13 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 50630b3f1ada0bf412d3f28e73bac310448d9d6f Mon Sep 17 00:00:00 2001
From: Ronnie Sahlberg <lsahlber@xxxxxxxxxx>
Date: Tue, 13 Jul 2021 12:22:59 +1000
Subject: cifs: Do not use the original cruid when following DFS links for multiuser mounts
From: Ronnie Sahlberg <lsahlber@xxxxxxxxxx>
commit 50630b3f1ada0bf412d3f28e73bac310448d9d6f upstream.
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=213565
cruid should only be used for the initial mount and after this we should use the current
users credentials.
Ignore the original cruid mount argument when creating a new context for a multiuser mount
following a DFS link.
Fixes: 24e0a1eff9e2 ("cifs: switch to new mount api")
Cc: stable@xxxxxxxxxxxxxxx # 5.11+
Reported-by: Xiaoli Feng <xifeng@xxxxxxxxxx>
Signed-off-by: Ronnie Sahlberg <lsahlber@xxxxxxxxxx>
Reviewed-by: Paulo Alcantara (SUSE) <pc@xxxxxx>
Signed-off-by: Steve French <stfrench@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/cifs/cifs_dfs_ref.c | 4 ++++
1 file changed, 4 insertions(+)
--- a/fs/cifs/cifs_dfs_ref.c
+++ b/fs/cifs/cifs_dfs_ref.c
@@ -208,6 +208,10 @@ char *cifs_compose_mount_options(const c
else
noff = tkn_e - (sb_mountdata + off) + 1;
+ if (strncasecmp(sb_mountdata + off, "cruid=", 6) == 0) {
+ off += noff;
+ continue;
+ }
if (strncasecmp(sb_mountdata + off, "unc=", 4) == 0) {
off += noff;
continue;
Patches currently in stable-queue which might be from lsahlber@xxxxxxxxxx are
queue-5.13/cifs-do-not-use-the-original-cruid-when-following-dfs-links-for-multiuser-mounts.patch
