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: <1697599707-3546-1-git-send-email-jun.ann.lai@intel.com>
Date: Wed, 18 Oct 2023 11:28:27 +0800
From: Lai Peter Jun Ann <jun.ann.lai@...el.com>
To: Vinicius Costa Gomes <vinicius.gomes@...el.com>,
	Jamal Hadi Salim <jhs@...atatu.com>,
	Cong Wang <xiyou.wangcong@...il.com>,
	Jiri Pirko <jiri@...nulli.us>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>
Cc: netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Lai Peter Jun Ann <jun.ann.lai@...el.com>
Subject: [PATCH net-next v2 1/1] taprio: Add boundary check for sched-entry values

Adds boundary checks for the gatemask provided against the number of
traffic class defined for each sched-entry.

Without this check, the user would not know that the gatemask provided is
invalid and the driver has already truncated the gatemask provided to
match the number of traffic class defined.

Signed-off-by: Muhammad Husaini Zulkifli <muhammad.husaini.zulkifli@...el.com>
Signed-off-by: Michael Sit Wei Hong <michael.wei.hong.sit@...el.com>
Signed-off-by: Lai Peter Jun Ann <jun.ann.lai@...el.com>
---
 net/sched/sch_taprio.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/net/sched/sch_taprio.c b/net/sched/sch_taprio.c
index 1cb5e41..44b9e21 100644
--- a/net/sched/sch_taprio.c
+++ b/net/sched/sch_taprio.c
@@ -102,6 +102,7 @@ struct taprio_sched {
 	u32 max_sdu[TC_MAX_QUEUE]; /* save info from the user */
 	u32 fp[TC_QOPT_MAX_QUEUE]; /* only for dump and offloading */
 	u32 txtime_delay;
+	u8 num_tc;
 };
 
 struct __tc_taprio_qopt_offload {
@@ -1063,6 +1064,11 @@ static int fill_sched_entry(struct taprio_sched *q, struct nlattr **tb,
 		return -EINVAL;
 	}
 
+	if (entry->gate_mask >= q->num_tc) {
+		NL_SET_ERR_MSG(extack, "Traffic Class defined less than gatemask");
+		return -EINVAL;
+	}
+
 	entry->interval = interval;
 
 	return 0;
@@ -1913,6 +1919,8 @@ static int taprio_change(struct Qdisc *sch, struct nlattr *opt,
 		for (i = 0; i <= TC_BITMASK; i++)
 			netdev_set_prio_tc_map(dev, i,
 					       mqprio->prio_tc_map[i]);
+
+		q->num_tc = mqprio->num_tc;
 	}
 
 	err = parse_taprio_schedule(q, tb, new_admin, extack);
-- 
1.9.1


Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ