From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org, "David S. Miller" <davem@davemloft.net>,
Christian Borntraeger <borntraeger@de.ibm.com>,
"Michael S. Tsirkin" <mst@redhat.com>,
Matthew Rosato <mjrosato@linux.vnet.ibm.com>
Subject: [PATCH 4.2 16/30] macvtap: fix TUNSETSNDBUF values > 64k
Date: Thu, 1 Oct 2015 11:21:38 +0200 [thread overview]
Message-ID: <20151001092038.903997237@linuxfoundation.org> (raw)
In-Reply-To: <20151001092038.213304276@linuxfoundation.org>
4.2-stable review patch. If anyone has any objections, please let me know.
------------------
From: "Michael S. Tsirkin" <mst@redhat.com>
[ Upstream commit 3ea79249e81e5ed051f2e6480cbde896d99046e8 ]
Upon TUNSETSNDBUF, macvtap reads the requested sndbuf size into
a local variable u.
commit 39ec7de7092b ("macvtap: fix uninitialized access on
TUNSETIFF") changed its type to u16 (which is the right thing to
do for all other macvtap ioctls), breaking all values > 64k.
The value of TUNSETSNDBUF is actually a signed 32 bit integer, so
the right thing to do is to read it into an int.
Cc: David S. Miller <davem@davemloft.net>
Fixes: 39ec7de7092b ("macvtap: fix uninitialized access on TUNSETIFF")
Reported-by: Mark A. Peloquin
Bisected-by: Matthew Rosato <mjrosato@linux.vnet.ibm.com>
Reported-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Tested-by: Matthew Rosato <mjrosato@linux.vnet.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/net/macvtap.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/net/macvtap.c
+++ b/drivers/net/macvtap.c
@@ -1111,10 +1111,10 @@ static long macvtap_ioctl(struct file *f
return 0;
case TUNSETSNDBUF:
- if (get_user(u, up))
+ if (get_user(s, sp))
return -EFAULT;
- q->sk.sk_sndbuf = u;
+ q->sk.sk_sndbuf = s;
return 0;
case TUNGETVNETHDRSZ:
next prev parent reply other threads:[~2015-10-01 9:22 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-01 9:21 [PATCH 4.2 00/30] 4.2.3-stable review Greg Kroah-Hartman
2015-10-01 9:21 ` [PATCH 4.2 01/30] phylib: fix device deletion order in mdiobus_unregister() Greg Kroah-Hartman
2015-10-01 9:21 ` [PATCH 4.2 02/30] sock, diag: fix panic in sock_diag_put_filterinfo Greg Kroah-Hartman
2015-10-01 9:21 ` [PATCH 4.2 03/30] ipv6: fix exthdrs offload registration in out_rt path Greg Kroah-Hartman
2015-10-01 9:21 ` [PATCH 4.2 04/30] net: fec: clear receive interrupts before processing a packet Greg Kroah-Hartman
2015-10-01 9:21 ` [PATCH 4.2 05/30] net: eth: altera: fix napi poll_list corruption Greg Kroah-Hartman
2015-10-01 9:21 ` [PATCH 4.2 06/30] net/ipv6: Correct PIM6 mrt_lock handling Greg Kroah-Hartman
2015-10-01 9:21 ` [PATCH 4.2 07/30] net: dsa: bcm_sf2: Fix ageing conditions and operation Greg Kroah-Hartman
2015-10-01 9:21 ` [PATCH 4.2 08/30] ipv6: fix multipath route replace error recovery Greg Kroah-Hartman
2015-10-01 9:21 ` [PATCH 4.2 09/30] net: dsa: bcm_sf2: Fix 64-bits register writes Greg Kroah-Hartman
2015-10-01 9:21 ` [PATCH 4.2 10/30] netlink, mmap: transform mmap skb into full skb on taps Greg Kroah-Hartman
2015-10-01 9:21 ` [PATCH 4.2 11/30] sctp: fix race on protocol/netns initialization Greg Kroah-Hartman
2015-10-01 9:21 ` [PATCH 4.2 13/30] net: mvneta: fix DMA buffer unmapping in mvneta_rx() Greg Kroah-Hartman
2015-10-01 9:21 ` [PATCH 4.2 14/30] rtnetlink: catch -EOPNOTSUPP errors from ndo_bridge_getlink Greg Kroah-Hartman
2015-10-01 9:21 ` [PATCH 4.2 15/30] net/mlx4_en: really allow to change RSS key Greg Kroah-Hartman
2015-10-01 9:21 ` Greg Kroah-Hartman [this message]
2015-10-01 9:21 ` [PATCH 4.2 17/30] netlink: Fix autobind race condition that leads to zero port ID Greg Kroah-Hartman
2015-10-01 9:21 ` [PATCH 4.2 18/30] netlink: Replace rhash_portid with bound Greg Kroah-Hartman
2015-10-01 9:21 ` [PATCH 4.2 19/30] net: dsa: actually force the speed on the CPU port Greg Kroah-Hartman
2015-10-01 9:21 ` [PATCH 4.2 20/30] openvswitch: Zero flows on allocation Greg Kroah-Hartman
2015-10-01 9:21 ` [PATCH 4.2 21/30] tcp: add proper TS val into RST packets Greg Kroah-Hartman
2015-10-01 9:21 ` [PATCH 4.2 22/30] Fix AF_PACKET ABI breakage in 4.2 Greg Kroah-Hartman
2015-10-01 9:21 ` [PATCH 4.2 23/30] net: revert "net_sched: move tp->root allocation into fw_init()" Greg Kroah-Hartman
2015-10-01 9:21 ` [PATCH 4.2 24/30] fib_rules: fix fib rule dumps across multiple skbs Greg Kroah-Hartman
2015-10-01 9:21 ` [PATCH 4.2 25/30] ppp: fix lockdep splat in ppp_dev_uninit() Greg Kroah-Hartman
2015-10-01 9:21 ` [PATCH 4.2 26/30] net: dsa: bcm_sf2: Do not override speed settings Greg Kroah-Hartman
2015-10-01 9:21 ` [PATCH 4.2 27/30] net: phy: fixed_phy: handle link-down case Greg Kroah-Hartman
2015-10-01 9:21 ` [PATCH 4.2 28/30] of_mdio: add new DT property managed to specify the PHY management type Greg Kroah-Hartman
2015-10-01 9:21 ` [PATCH 4.2 29/30] mvneta: use inband status only when explicitly enabled Greg Kroah-Hartman
2015-10-01 9:21 ` [PATCH 4.2 30/30] net/mlx4_core: Capping number of requested MSIXs to MAX_MSIX Greg Kroah-Hartman
2015-10-02 1:27 ` [PATCH 4.2 00/30] 4.2.3-stable review Guenter Roeck
2015-10-03 11:37 ` Greg Kroah-Hartman
2015-10-03 14:45 ` Guenter Roeck
2015-10-18 0:45 ` Greg Kroah-Hartman
2015-10-02 5:14 ` Sudip Mukherjee
2015-10-03 11:36 ` Greg Kroah-Hartman
2015-10-02 15:41 ` Shuah Khan
2015-10-03 11:36 ` Greg Kroah-Hartman
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