lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Message-Id: <20240723133230.1325392-1-make24@iscas.ac.cn>
Date: Tue, 23 Jul 2024 21:32:30 +0800
From: Ma Ke <make24@...as.ac.cn>
To: heikki.krogerus@...ux.intel.com,
	gregkh@...uxfoundation.org,
	make24@...as.ac.cn,
	dmitry.baryshkov@...aro.org,
	bleung@...omium.org,
	utkarsh.h.patel@...el.com,
	abhishekpandit@...omium.org,
	kyletso@...gle.com
Cc: linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] usb: typec: ucsi: Fix NULL pointer dereference in ucsi_displayport_vdm()

When dp->con->partner is an error, a NULL pointer dereference may occur.
Add a check for dp->con->partner to avoid dereferencing a NULL pointer.

Fixes: 372adf075a43 ("usb: typec: ucsi: Determine common SVDM Version")
Signed-off-by: Ma Ke <make24@...as.ac.cn>
---
 drivers/usb/typec/ucsi/displayport.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/usb/typec/ucsi/displayport.c b/drivers/usb/typec/ucsi/displayport.c
index 420af5139c70..eb7d3f97940a 100644
--- a/drivers/usb/typec/ucsi/displayport.c
+++ b/drivers/usb/typec/ucsi/displayport.c
@@ -222,6 +222,8 @@ static int ucsi_displayport_vdm(struct typec_altmode *alt,
 	switch (cmd_type) {
 	case CMDT_INIT:
 		if (PD_VDO_SVDM_VER(header) < svdm_version) {
+			if (IS_ERR_OR_NULL(dp->con->parter))
+				break;
 			typec_partner_set_svdm_version(dp->con->partner, PD_VDO_SVDM_VER(header));
 			svdm_version = PD_VDO_SVDM_VER(header);
 		}
-- 
2.25.1


Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ