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cifs: fix uninitialised lease_key in open_shroot() 

commit 0fe0781f29 upstream.

SMB2_open_init() expects a pre-initialised lease_key when opening a
file with a lease, so set pfid->lease_key prior to calling it in
open_shroot().

This issue was observed when performing some DFS failover tests and
the lease key was never randomly generated.

Signed-off-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
Reviewed-by: Aurelien Aptel <aaptel@suse.com>
CC: Stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5.4-rM2-2.2.x-imx-squashed
Paulo Alcantara 2020-04-20 23:44:24 -03:00 committed by Greg Kroah-Hartman
parent 562489ba10
commit eabc107d20
1 changed files with 5 additions and 0 deletions
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5
fs/cifs/smb2ops.c
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@ -664,6 +664,11 @@ int open_shroot(unsigned int xid, struct cifs_tcon *tcon, struct cifs_fid *pfid)
if (smb3_encryption_required(tcon))
flags |= CIFS_TRANSFORM_REQ;
if (!server->ops->new_lease_key)
return -EIO;
server->ops->new_lease_key(pfid);
memset(rqst, 0, sizeof(rqst));
resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;
memset(rsp_iov, 0, sizeof(rsp_iov));