From: Ronnie Sahlberg <lsahlber-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
To: linux-cifs <linux-cifs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Cc: Steve French <smfrench-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Subject: [PATCH] CIFS: Fix NULL pointer deref on TCON failures
Date: Wed, 11 Oct 2017 10:01:38 +1100 [thread overview]
Message-ID: <20171010230138.31832-1-lsahlber@redhat.com> (raw)
Signed-off-by: Ronnie Sahlberg <lsahlber-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
---
fs/cifs/smb2pdu.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
index 6f0e6343c15e..6ff4c275ca9a 100644
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -1255,7 +1255,7 @@ SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree,
struct smb2_tree_connect_req *req;
struct smb2_tree_connect_rsp *rsp = NULL;
struct kvec iov[2];
- struct kvec rsp_iov;
+ struct kvec rsp_iov = { NULL, 0 };
int rc = 0;
int resp_buftype;
int unc_path_len;
@@ -1315,6 +1315,8 @@ SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree,
rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, flags, &rsp_iov);
cifs_small_buf_release(req);
rsp = (struct smb2_tree_connect_rsp *)rsp_iov.iov_base;
+ if (rsp == NULL)
+ goto tcon_exit;
if (rc != 0) {
if (tcon) {
--
2.13.3
next reply other threads:[~2017-10-10 23:01 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-10 23:01 Ronnie Sahlberg [this message]
2017-10-11 11:23 ` [PATCH] CIFS: Fix NULL pointer deref on SMB2_tcon() failure Aurelien Aptel
[not found] ` <20171011112336.11263-1-aaptel-IBi9RG/b67k@public.gmane.org>
2017-10-11 18:08 ` Pavel Shilovsky
[not found] ` <20171010230138.31832-1-lsahlber-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2017-10-10 23:07 ` [PATCH] CIFS: Fix NULL pointer deref on TCON failures Steve French
2017-10-11 11:23 ` Aurélien Aptel
2017-10-11 15:18 ` Steve French
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20171010230138.31832-1-lsahlber@redhat.com \
--to=lsahlber-h+wxahxf7alqt0dzr+alfa@public.gmane.org \
--cc=linux-cifs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=smfrench-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox