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cifs: Check the lease context if we actually got a lease 

commit 66d45ca135 upstream.

Some servers may return that we got a lease in rsp->OplockLevel
but then in the lease context contradict this and say we got no lease
at all.  Thus we need to check the context if we have a lease.
Additionally, If we do not get a lease we need to make sure we close
the handle before we return an error to the caller.

Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Cc: stable@vger.kernel.org
Reviewed-by: Bharath SM <bharathsm@microsoft.com>
Reviewed-by: Paulo Alcantara (SUSE) <pc@manguebit.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ronnie Sahlberg 2023-02-17 13:35:00 +10:00 committed by Greg Kroah-Hartman
parent f1d8494328
commit c992b699b9
1 changed files with 9 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
fs/cifs/cached_dir.c
View File

@ -221,8 +221,7 @@ int open_cached_dir(unsigned int xid, struct cifs_tcon *tcon,
}
goto oshr_free;
}
atomic_inc(&tcon->num_remote_opens);
cfid->is_open = true;
o_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
oparms.fid->persistent_fid = o_rsp->PersistentFileId;
@ -239,7 +238,8 @@ int open_cached_dir(unsigned int xid, struct cifs_tcon *tcon,
&oparms.fid->epoch,
oparms.fid->lease_key, &oplock,
NULL, NULL);
if (!(oplock & SMB2_LEASE_READ_CACHING_HE))
goto oshr_free;
qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
if (le32_to_cpu(qi_rsp->OutputBufferLength) < sizeof(struct smb2_file_all_info))
goto oshr_free;
@ -262,7 +262,6 @@ int open_cached_dir(unsigned int xid, struct cifs_tcon *tcon,
cfid->dentry = dentry;
cfid->tcon = tcon;
cfid->time = jiffies;
cfid->is_open = true;
cfid->has_lease = true;
oshr_free:
@ -282,12 +281,17 @@ int open_cached_dir(unsigned int xid, struct cifs_tcon *tcon,
}
spin_unlock(&cfids->cfid_list_lock);
if (rc) {
if (cfid->is_open)
SMB2_close(0, cfid->tcon, cfid->fid.persistent_fid,
cfid->fid.volatile_fid);
free_cached_dir(cfid);
cfid = NULL;
}
if (rc == 0)
if (rc == 0) {
*ret_cfid = cfid;
atomic_inc(&tcon->num_remote_opens);
}
return rc;
}