From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org,
Vladyslav Tarasiuk <vladyslavt@mellanox.com>,
"David S. Miller" <davem@davemloft.net>
Subject: [PATCH 5.3 02/25] mqprio: Fix out-of-bounds access in mqprio_dump
Date: Tue, 17 Dec 2019 21:16:01 +0100 [thread overview]
Message-ID: <20191217200904.475066246@linuxfoundation.org> (raw)
In-Reply-To: <20191217200903.179327435@linuxfoundation.org>
From: Vladyslav Tarasiuk <vladyslavt@mellanox.com>
[ Upstream commit 9f104c7736904ac72385bbb48669e0c923ca879b ]
When user runs a command like
tc qdisc add dev eth1 root mqprio
KASAN stack-out-of-bounds warning is emitted.
Currently, NLA_ALIGN macro used in mqprio_dump provides too large
buffer size as argument for nla_put and memcpy down the call stack.
The flow looks like this:
1. nla_put expects exact object size as an argument;
2. Later it provides this size to memcpy;
3. To calculate correct padding for SKB, nla_put applies NLA_ALIGN
macro itself.
Therefore, NLA_ALIGN should not be applied to the nla_put parameter.
Otherwise it will lead to out-of-bounds memory access in memcpy.
Fixes: 4e8b86c06269 ("mqprio: Introduce new hardware offload mode and shaper in mqprio")
Signed-off-by: Vladyslav Tarasiuk <vladyslavt@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
net/sched/sch_mqprio.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/net/sched/sch_mqprio.c
+++ b/net/sched/sch_mqprio.c
@@ -433,7 +433,7 @@ static int mqprio_dump(struct Qdisc *sch
opt.offset[tc] = dev->tc_to_txq[tc].offset;
}
- if (nla_put(skb, TCA_OPTIONS, NLA_ALIGN(sizeof(opt)), &opt))
+ if (nla_put(skb, TCA_OPTIONS, sizeof(opt), &opt))
goto nla_put_failure;
if ((priv->flags & TC_MQPRIO_F_MODE) &&
next prev parent reply other threads:[~2019-12-17 20:17 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-17 20:15 [PATCH 5.3 00/25] 5.3.18-stable review Greg Kroah-Hartman
2019-12-17 20:16 ` [PATCH 5.3 01/25] inet: protect against too small mtu values Greg Kroah-Hartman
2019-12-17 20:16 ` Greg Kroah-Hartman [this message]
2019-12-17 20:16 ` [PATCH 5.3 03/25] net: bridge: deny dev_set_mac_address() when unregistering Greg Kroah-Hartman
2019-12-17 20:16 ` [PATCH 5.3 04/25] net: dsa: fix flow dissection on Tx path Greg Kroah-Hartman
2019-12-17 20:16 ` [PATCH 5.3 05/25] net: ethernet: ti: cpsw: fix extra rx interrupt Greg Kroah-Hartman
2019-12-17 20:16 ` [PATCH 5.3 06/25] net: sched: fix dump qlen for sch_mq/sch_mqprio with NOLOCK subqueues Greg Kroah-Hartman
2019-12-17 20:16 ` [PATCH 5.3 07/25] net-sysfs: Call dev_hold always in netdev_queue_add_kobject Greg Kroah-Hartman
2019-12-17 20:16 ` [PATCH 5.3 08/25] net: thunderx: start phy before starting autonegotiation Greg Kroah-Hartman
2019-12-17 20:16 ` [PATCH 5.3 09/25] net/tls: Fix return values to avoid ENOTSUPP Greg Kroah-Hartman
2019-12-17 20:16 ` [PATCH 5.3 10/25] openvswitch: support asymmetric conntrack Greg Kroah-Hartman
2019-12-17 20:16 ` [PATCH 5.3 11/25] tcp: md5: fix potential overestimation of TCP option space Greg Kroah-Hartman
2019-12-17 20:16 ` [PATCH 5.3 12/25] tipc: fix ordering of tipc module init and exit routine Greg Kroah-Hartman
2019-12-17 20:16 ` [PATCH 5.3 13/25] net/mlx5e: Query global pause state before setting prio2buffer Greg Kroah-Hartman
2019-12-17 20:16 ` [PATCH 5.3 14/25] net: ipv6: add net argument to ip6_dst_lookup_flow Greg Kroah-Hartman
2019-12-17 20:16 ` [PATCH 5.3 15/25] net: ipv6_stub: use ip6_dst_lookup_flow instead of ip6_dst_lookup Greg Kroah-Hartman
2019-12-17 20:16 ` [PATCH 5.3 16/25] tcp: fix rejected syncookies due to stale timestamps Greg Kroah-Hartman
2019-12-17 20:16 ` [PATCH 5.3 17/25] tcp: tighten acceptance of ACKs not matching a child socket Greg Kroah-Hartman
2019-12-17 20:16 ` [PATCH 5.3 18/25] tcp: Protect accesses to .ts_recent_stamp with {READ,WRITE}_ONCE() Greg Kroah-Hartman
2019-12-17 20:16 ` [PATCH 5.3 19/25] gre: refetch erspan header from skb->data after pskb_may_pull() Greg Kroah-Hartman
2019-12-17 20:16 ` [PATCH 5.3 20/25] Fixed updating of ethertype in function skb_mpls_pop Greg Kroah-Hartman
2019-12-17 20:16 ` [PATCH 5.3 21/25] hsr: fix a NULL pointer dereference in hsr_dev_xmit() Greg Kroah-Hartman
2019-12-17 20:16 ` [PATCH 5.3 22/25] net: Fixed updating of ethertype in skb_mpls_push() Greg Kroah-Hartman
2019-12-17 20:16 ` [PATCH 5.3 23/25] net/mlx5e: Fix TXQ indices to be sequential Greg Kroah-Hartman
2019-12-17 20:16 ` [PATCH 5.3 24/25] page_pool: do not release pool until inflight == 0 Greg Kroah-Hartman
2019-12-17 20:16 ` [PATCH 5.3 25/25] xdp: obtain the mem_id mutex before trying to remove an entry Greg Kroah-Hartman
2019-12-18 8:01 ` [PATCH 5.3 00/25] 5.3.18-stable review Naresh Kamboju
2019-12-18 10:23 ` Jon Hunter
2019-12-18 14:47 ` Guenter Roeck
2019-12-18 21:00 ` shuah
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