| From 50630b3f1ada0bf412d3f28e73bac310448d9d6f Mon Sep 17 00:00:00 2001 |
| From: Ronnie Sahlberg <lsahlber@redhat.com> |
| 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@redhat.com> |
| |
| 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@vger.kernel.org # 5.11+ |
| Reported-by: Xiaoli Feng <xifeng@redhat.com> |
| Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com> |
| Reviewed-by: Paulo Alcantara (SUSE) <pc@cjr.nz> |
| Signed-off-by: Steve French <stfrench@microsoft.com> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| --- |
| 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; |
