diff options
| author | Paulo Alcantara <pc@manguebit.com> | 2023-04-27 22:07:38 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-05-11 17:03:41 +0300 |
| commit | e4a37e9060095e9dc65294219a5cc4c24f890204 (patch) | |
| tree | 7f4ca185c46dfbcaa285a6a1aac5411223165e77 /fs/cifs | |
| parent | 64d62ac6d6514cba1305bd08e271ec1843bdd612 (diff) | |
| download | linux-e4a37e9060095e9dc65294219a5cc4c24f890204.tar.xz | |
cifs: protect session status check in smb2_reconnect()
commit 5bff9f741af60b143a5ae73417a8ec47fd5ff2f4 upstream.
Use @ses->ses_lock to protect access of @ses->ses_status.
Cc: stable@vger.kernel.org
Signed-off-by: Paulo Alcantara (SUSE) <pc@manguebit.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/cifs')
| -rw-r--r-- | fs/cifs/smb2pdu.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c index ab59faf8a06a..537e8679900b 100644 --- a/fs/cifs/smb2pdu.c +++ b/fs/cifs/smb2pdu.c @@ -175,8 +175,17 @@ smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon, } } spin_unlock(&tcon->tc_lock); - if ((!tcon->ses) || (tcon->ses->ses_status == SES_EXITING) || - (!tcon->ses->server) || !server) + + ses = tcon->ses; + if (!ses) + return -EIO; + spin_lock(&ses->ses_lock); + if (ses->ses_status == SES_EXITING) { + spin_unlock(&ses->ses_lock); + return -EIO; + } + spin_unlock(&ses->ses_lock); + if (!ses->server || !server) return -EIO; spin_lock(&server->srv_lock); @@ -204,8 +213,6 @@ again: if (rc) return rc; - ses = tcon->ses; - spin_lock(&ses->chan_lock); if (!cifs_chan_needs_reconnect(ses, server) && !tcon->need_reconnect) { spin_unlock(&ses->chan_lock); |