From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org, Brad Spengler <spender@grsecurity.net>,
mpb <mpb.mail@gmail.com>, "David S. Miller" <davem@davemloft.net>,
Eric Dumazet <eric.dumazet@gmail.com>,
Hannes Frederic Sowa <hannes@stressinduktion.org>
Subject: [PATCH 3.12 32/83] inet: fix addr_len/msg->msg_namelen assignment in recv_error and rxpmtu functions
Date: Fri, 6 Dec 2013 13:51:22 -0800 [thread overview]
Message-ID: <20131206214643.041362791@linuxfoundation.org> (raw)
In-Reply-To: <20131206214640.002320724@linuxfoundation.org>
3.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Hannes Frederic Sowa <hannes@stressinduktion.org>
[ Upstream commit 85fbaa75037d0b6b786ff18658ddf0b4014ce2a4 ]
Commit bceaa90240b6019ed73b49965eac7d167610be69 ("inet: prevent leakage
of uninitialized memory to user in recv syscalls") conditionally updated
addr_len if the msg_name is written to. The recv_error and rxpmtu
functions relied on the recvmsg functions to set up addr_len before.
As this does not happen any more we have to pass addr_len to those
functions as well and set it to the size of the corresponding sockaddr
length.
This broke traceroute and such.
Fixes: bceaa90240b6 ("inet: prevent leakage of uninitialized memory to user in recv syscalls")
Reported-by: Brad Spengler <spender@grsecurity.net>
Reported-by: Tom Labanowski
Cc: mpb <mpb.mail@gmail.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
include/net/ip.h | 2 +-
include/net/ipv6.h | 6 ++++--
include/net/ping.h | 3 ++-
net/ipv4/ip_sockglue.c | 3 ++-
net/ipv4/ping.c | 5 +++--
net/ipv4/raw.c | 2 +-
net/ipv4/udp.c | 2 +-
net/ipv6/datagram.c | 7 +++++--
net/ipv6/ping.c | 3 ++-
net/ipv6/raw.c | 4 ++--
net/ipv6/udp.c | 4 ++--
net/l2tp/l2tp_ip6.c | 2 +-
12 files changed, 26 insertions(+), 17 deletions(-)
--- a/include/net/ip.h
+++ b/include/net/ip.h
@@ -464,7 +464,7 @@ extern int compat_ip_getsockopt(struct s
int optname, char __user *optval, int __user *optlen);
extern int ip_ra_control(struct sock *sk, unsigned char on, void (*destructor)(struct sock *));
-extern int ip_recv_error(struct sock *sk, struct msghdr *msg, int len);
+extern int ip_recv_error(struct sock *sk, struct msghdr *msg, int len, int *addr_len);
extern void ip_icmp_error(struct sock *sk, struct sk_buff *skb, int err,
__be16 port, u32 info, u8 *payload);
extern void ip_local_error(struct sock *sk, int err, __be32 daddr, __be16 dport,
--- a/include/net/ipv6.h
+++ b/include/net/ipv6.h
@@ -802,8 +802,10 @@ extern int compat_ipv6_getsockopt(stru
extern int ip6_datagram_connect(struct sock *sk,
struct sockaddr *addr, int addr_len);
-extern int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len);
-extern int ipv6_recv_rxpmtu(struct sock *sk, struct msghdr *msg, int len);
+extern int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len,
+ int *addr_len);
+extern int ipv6_recv_rxpmtu(struct sock *sk, struct msghdr *msg, int len,
+ int *addr_len);
extern void ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, __be16 port,
u32 info, u8 *payload);
extern void ipv6_local_error(struct sock *sk, int err, struct flowi6 *fl6, u32 info);
--- a/include/net/ping.h
+++ b/include/net/ping.h
@@ -31,7 +31,8 @@
/* Compatibility glue so we can support IPv6 when it's compiled as a module */
struct pingv6_ops {
- int (*ipv6_recv_error)(struct sock *sk, struct msghdr *msg, int len);
+ int (*ipv6_recv_error)(struct sock *sk, struct msghdr *msg, int len,
+ int *addr_len);
int (*ip6_datagram_recv_ctl)(struct sock *sk, struct msghdr *msg,
struct sk_buff *skb);
int (*icmpv6_err_convert)(u8 type, u8 code, int *err);
--- a/net/ipv4/ip_sockglue.c
+++ b/net/ipv4/ip_sockglue.c
@@ -368,7 +368,7 @@ void ip_local_error(struct sock *sk, int
/*
* Handle MSG_ERRQUEUE
*/
-int ip_recv_error(struct sock *sk, struct msghdr *msg, int len)
+int ip_recv_error(struct sock *sk, struct msghdr *msg, int len, int *addr_len)
{
struct sock_exterr_skb *serr;
struct sk_buff *skb, *skb2;
@@ -405,6 +405,7 @@ int ip_recv_error(struct sock *sk, struc
serr->addr_offset);
sin->sin_port = serr->port;
memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
+ *addr_len = sizeof(*sin);
}
memcpy(&errhdr.ee, &serr->ee, sizeof(struct sock_extended_err));
--- a/net/ipv4/ping.c
+++ b/net/ipv4/ping.c
@@ -838,10 +838,11 @@ int ping_recvmsg(struct kiocb *iocb, str
if (flags & MSG_ERRQUEUE) {
if (family == AF_INET) {
- return ip_recv_error(sk, msg, len);
+ return ip_recv_error(sk, msg, len, addr_len);
#if IS_ENABLED(CONFIG_IPV6)
} else if (family == AF_INET6) {
- return pingv6_ops.ipv6_recv_error(sk, msg, len);
+ return pingv6_ops.ipv6_recv_error(sk, msg, len,
+ addr_len);
#endif
}
}
--- a/net/ipv4/raw.c
+++ b/net/ipv4/raw.c
@@ -695,7 +695,7 @@ static int raw_recvmsg(struct kiocb *ioc
goto out;
if (flags & MSG_ERRQUEUE) {
- err = ip_recv_error(sk, msg, len);
+ err = ip_recv_error(sk, msg, len, addr_len);
goto out;
}
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -1210,7 +1210,7 @@ int udp_recvmsg(struct kiocb *iocb, stru
bool slow;
if (flags & MSG_ERRQUEUE)
- return ip_recv_error(sk, msg, len);
+ return ip_recv_error(sk, msg, len, addr_len);
try_again:
skb = __skb_recv_datagram(sk, flags | (noblock ? MSG_DONTWAIT : 0),
--- a/net/ipv6/datagram.c
+++ b/net/ipv6/datagram.c
@@ -318,7 +318,7 @@ void ipv6_local_rxpmtu(struct sock *sk,
/*
* Handle MSG_ERRQUEUE
*/
-int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len)
+int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len, int *addr_len)
{
struct ipv6_pinfo *np = inet6_sk(sk);
struct sock_exterr_skb *serr;
@@ -369,6 +369,7 @@ int ipv6_recv_error(struct sock *sk, str
&sin->sin6_addr);
sin->sin6_scope_id = 0;
}
+ *addr_len = sizeof(*sin);
}
memcpy(&errhdr.ee, &serr->ee, sizeof(struct sock_extended_err));
@@ -423,7 +424,8 @@ EXPORT_SYMBOL_GPL(ipv6_recv_error);
/*
* Handle IPV6_RECVPATHMTU
*/
-int ipv6_recv_rxpmtu(struct sock *sk, struct msghdr *msg, int len)
+int ipv6_recv_rxpmtu(struct sock *sk, struct msghdr *msg, int len,
+ int *addr_len)
{
struct ipv6_pinfo *np = inet6_sk(sk);
struct sk_buff *skb;
@@ -457,6 +459,7 @@ int ipv6_recv_rxpmtu(struct sock *sk, st
sin->sin6_port = 0;
sin->sin6_scope_id = mtu_info.ip6m_addr.sin6_scope_id;
sin->sin6_addr = mtu_info.ip6m_addr.sin6_addr;
+ *addr_len = sizeof(*sin);
}
put_cmsg(msg, SOL_IPV6, IPV6_PATHMTU, sizeof(mtu_info), &mtu_info);
--- a/net/ipv6/ping.c
+++ b/net/ipv6/ping.c
@@ -57,7 +57,8 @@ static struct inet_protosw pingv6_protos
/* Compatibility glue so we can support IPv6 when it's compiled as a module */
-static int dummy_ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len)
+static int dummy_ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len,
+ int *addr_len)
{
return -EAFNOSUPPORT;
}
--- a/net/ipv6/raw.c
+++ b/net/ipv6/raw.c
@@ -467,10 +467,10 @@ static int rawv6_recvmsg(struct kiocb *i
return -EOPNOTSUPP;
if (flags & MSG_ERRQUEUE)
- return ipv6_recv_error(sk, msg, len);
+ return ipv6_recv_error(sk, msg, len, addr_len);
if (np->rxpmtu && np->rxopt.bits.rxpmtu)
- return ipv6_recv_rxpmtu(sk, msg, len);
+ return ipv6_recv_rxpmtu(sk, msg, len, addr_len);
skb = skb_recv_datagram(sk, flags, noblock, &err);
if (!skb)
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -375,10 +375,10 @@ int udpv6_recvmsg(struct kiocb *iocb, st
bool slow;
if (flags & MSG_ERRQUEUE)
- return ipv6_recv_error(sk, msg, len);
+ return ipv6_recv_error(sk, msg, len, addr_len);
if (np->rxpmtu && np->rxopt.bits.rxpmtu)
- return ipv6_recv_rxpmtu(sk, msg, len);
+ return ipv6_recv_rxpmtu(sk, msg, len, addr_len);
try_again:
skb = __skb_recv_datagram(sk, flags | (noblock ? MSG_DONTWAIT : 0),
--- a/net/l2tp/l2tp_ip6.c
+++ b/net/l2tp/l2tp_ip6.c
@@ -665,7 +665,7 @@ static int l2tp_ip6_recvmsg(struct kiocb
*addr_len = sizeof(*lsa);
if (flags & MSG_ERRQUEUE)
- return ipv6_recv_error(sk, msg, len);
+ return ipv6_recv_error(sk, msg, len, addr_len);
skb = skb_recv_datagram(sk, flags, noblock, &err);
if (!skb)
next prev parent reply other threads:[~2013-12-06 22:37 UTC|newest]
Thread overview: 90+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-06 21:50 [PATCH 3.12 00/83] 3.12.4-stable review Greg Kroah-Hartman
2013-12-06 21:50 ` [PATCH 3.12 01/83] net: mv643xx_eth: Add missing phy_addr_set in DT mode Greg Kroah-Hartman
2013-12-06 21:50 ` [PATCH 3.12 02/83] net: mv643xx_eth: potential NULL dereference in probe() Greg Kroah-Hartman
2013-12-06 21:50 ` [PATCH 3.12 03/83] ipv6: fix headroom calculation in udp6_ufo_fragment Greg Kroah-Hartman
2013-12-06 21:50 ` [PATCH 3.12 04/83] bonding: RCUify bond_set_rx_mode() Greg Kroah-Hartman
2013-12-06 21:50 ` [PATCH 3.12 05/83] net: x86: bpf: dont forget to free sk_filter (v2) Greg Kroah-Hartman
2013-12-06 21:50 ` [PATCH 3.12 06/83] net/mlx4_en: Fixed crash when port type is changed Greg Kroah-Hartman
2013-12-06 21:50 ` [PATCH 3.12 07/83] net: Fix "ip rule delete table 256" Greg Kroah-Hartman
2013-12-06 21:50 ` [PATCH 3.12 08/83] ipv6: use rt6_get_dflt_router to get default router in rt6_route_rcv Greg Kroah-Hartman
2013-12-06 21:50 ` [PATCH 3.12 09/83] ipv6: protect for_each_sk_fl_rcu in mem_check with rcu_read_lock_bh Greg Kroah-Hartman
2013-12-06 21:51 ` [PATCH 3.12 10/83] random32: fix off-by-one in seeding requirement Greg Kroah-Hartman
2013-12-06 21:51 ` [PATCH 3.12 11/83] bonding: dont permit to use ARP monitoring in 802.3ad mode Greg Kroah-Hartman
2013-12-06 21:51 ` [PATCH 3.12 12/83] usbnet: fix status interrupt urb handling Greg Kroah-Hartman
2013-12-06 21:51 ` [PATCH 3.12 13/83] core/dev: do not ignore dmac in dev_forward_skb() Greg Kroah-Hartman
2013-12-06 21:51 ` [PATCH 3.12 14/83] 6lowpan: Uncompression of traffic class field was incorrect Greg Kroah-Hartman
2013-12-06 21:51 ` [PATCH 3.12 15/83] tuntap: limit head length of skb allocated Greg Kroah-Hartman
2013-12-06 21:51 ` [PATCH 3.12 16/83] macvtap: " Greg Kroah-Hartman
2013-12-06 21:51 ` [PATCH 3.12 17/83] tcp: tsq: restore minimal amount of queueing Greg Kroah-Hartman
2013-12-06 21:51 ` [PATCH 3.12 18/83] bonding: fix two race conditions in bond_store_updelay/downdelay Greg Kroah-Hartman
2013-12-06 21:51 ` [PATCH 3.12 19/83] net-tcp: fix panic in tcp_fastopen_cache_set() Greg Kroah-Hartman
2013-12-06 21:51 ` [PATCH 3.12 20/83] sit: fix use after free of fb_tunnel_dev Greg Kroah-Hartman
2013-12-06 21:51 ` [PATCH 3.12 21/83] isdnloop: use strlcpy() instead of strcpy() Greg Kroah-Hartman
2013-12-06 21:51 ` [PATCH 3.12 22/83] ip6tnl: fix use after free of fb_tnl_dev Greg Kroah-Hartman
2013-12-06 21:51 ` [PATCH 3.12 23/83] pkt_sched: fq: change classification of control packets Greg Kroah-Hartman
2013-12-06 21:51 ` [PATCH 3.12 24/83] connector: improved unaligned access error fix Greg Kroah-Hartman
2013-12-06 21:51 ` [PATCH 3.12 25/83] ipv4: fix possible seqlock deadlock Greg Kroah-Hartman
2013-12-06 21:51 ` [PATCH 3.12 26/83] pkt_sched: fq: warn users using defrate Greg Kroah-Hartman
2013-12-06 21:51 ` [PATCH 3.12 27/83] pkt_sched: fq: fix pacing for small frames Greg Kroah-Hartman
2013-12-06 21:51 ` [PATCH 3.12 28/83] inet: prevent leakage of uninitialized memory to user in recv syscalls Greg Kroah-Hartman
2013-12-06 21:51 ` [PATCH 3.12 29/83] ping: prevent NULL pointer dereference on write to msg_name Greg Kroah-Hartman
2013-12-06 21:51 ` [PATCH 3.12 30/83] net: rework recvmsg handler msg_name and msg_namelen logic Greg Kroah-Hartman
2013-12-06 21:51 ` [PATCH 3.12 31/83] net: add BUG_ON if kernel advertises msg_namelen > sizeof(struct sockaddr_storage) Greg Kroah-Hartman
2013-12-06 21:51 ` Greg Kroah-Hartman [this message]
2013-12-06 21:51 ` [PATCH 3.12 33/83] net: clamp ->msg_namelen instead of returning an error Greg Kroah-Hartman
2013-12-06 21:51 ` [PATCH 3.12 34/83] ipv6: fix leaking uninitialized port number of offender sockaddr Greg Kroah-Hartman
2013-12-06 21:51 ` [PATCH 3.12 35/83] ipv6: Fix inet6_init() cleanup order Greg Kroah-Hartman
2013-12-06 21:51 ` [PATCH 3.12 36/83] ip6_output: fragment outgoing reassembled skb properly Greg Kroah-Hartman
2013-12-06 21:51 ` [PATCH 3.12 37/83] netfilter: push reasm skb through instead of original frag skbs Greg Kroah-Hartman
2013-12-06 21:51 ` [PATCH 3.12 38/83] xfrm: Release dst if this dst is improper for vti tunnel Greg Kroah-Hartman
2013-12-06 21:51 ` [PATCH 3.12 39/83] atm: idt77252: fix dev refcnt leak Greg Kroah-Hartman
2013-12-06 21:51 ` [PATCH 3.12 40/83] tcp: dont update snd_nxt, when a socket is switched from repair mode Greg Kroah-Hartman
2013-12-06 21:51 ` [PATCH 3.12 41/83] ipv4: fix race in concurrent ip_route_input_slow() Greg Kroah-Hartman
2013-12-06 21:51 ` [PATCH 3.12 42/83] net: core: Always propagate flag changes to interfaces Greg Kroah-Hartman
2013-12-06 21:51 ` [PATCH 3.12 43/83] bridge: flush brs address entry in fdb when remove the bridge dev Greg Kroah-Hartman
2013-12-06 21:51 ` [PATCH 3.12 44/83] packet: fix use after free race in send path when dev is released Greg Kroah-Hartman
2013-12-06 21:51 ` [PATCH 3.12 45/83] af_packet: block BH in prb_shutdown_retire_blk_timer() Greg Kroah-Hartman
2013-12-06 21:51 ` [PATCH 3.12 46/83] gso: handle new frag_list of frags GRO packets Greg Kroah-Hartman
2013-12-06 21:51 ` [PATCH 3.12 47/83] gro: Only verify TCP checksums for candidates Greg Kroah-Hartman
2013-12-06 21:51 ` [PATCH 3.12 48/83] gro: Clean up tcpX_gro_receive checksum verification Greg Kroah-Hartman
2013-12-06 21:51 ` [PATCH 3.12 49/83] sch_tbf: handle too small burst Greg Kroah-Hartman
2013-12-06 21:51 ` [PATCH 3.12 50/83] xen-netback: include definition of csum_ipv6_magic Greg Kroah-Hartman
2013-12-06 21:51 ` [PATCH 3.12 51/83] via-velocity: fix netif_receive_skb use in irq disabled section Greg Kroah-Hartman
2013-12-06 21:51 ` [PATCH 3.12 52/83] r8169: check ALDPS bit and disable it if enabled for the 8168g Greg Kroah-Hartman
2013-12-06 21:51 ` [PATCH 3.12 53/83] net: 8139cp: fix a BUG_ON triggered by wrong bytes_compl Greg Kroah-Hartman
2013-12-06 21:51 ` [PATCH 3.12 54/83] net: smc91: fix crash regression on the versatile Greg Kroah-Hartman
2013-12-06 21:51 ` [PATCH 3.12 55/83] net: update consumers of MSG_MORE to recognize MSG_SENDPAGE_NOTLAST Greg Kroah-Hartman
2013-12-06 21:51 ` [PATCH 3.12 56/83] team: fix master carrier set when user linkup is enabled Greg Kroah-Hartman
2013-12-06 21:51 ` [PATCH 3.12 57/83] inet: fix possible seqlock deadlocks Greg Kroah-Hartman
2013-12-06 21:51 ` [PATCH 3.12 58/83] ipv6: fix possible seqlock deadlock in ip6_finish_output2 Greg Kroah-Hartman
2013-12-06 21:51 ` [PATCH 3.12 59/83] {pktgen, xfrm} Update IPv4 header total len and checksum after tranformation Greg Kroah-Hartman
2013-12-06 21:51 ` [PATCH 3.12 60/83] xfrm: Fix null pointer dereference when decoding sessions Greg Kroah-Hartman
2013-12-06 21:51 ` [PATCH 3.12 61/83] xfs: add capability check to free eofblocks ioctl Greg Kroah-Hartman
2013-12-06 21:51 ` [PATCH 3.12 62/83] mm: numa: return the number of base pages altered by protection changes Greg Kroah-Hartman
2013-12-06 21:51 ` [PATCH 3.12 63/83] md/raid5: Use conf->device_lock protect changing of multi-thread resources Greg Kroah-Hartman
2013-12-06 21:51 ` [PATCH 3.12 64/83] usb: musb: davinci: fix resources passed to MUSB driver for DM6467 Greg Kroah-Hartman
2013-12-06 21:51 ` [PATCH 3.12 65/83] usb: wusbcore: change WA_SEGS_MAX to a legal value Greg Kroah-Hartman
2013-12-06 21:51 ` [PATCH 3.12 66/83] video: kyro: fix incorrect sizes when copying to userspace Greg Kroah-Hartman
2013-12-06 21:51 ` [PATCH 3.12 67/83] HID: lg: fix Report Descriptor for Logitech MOMO Force (Black) Greg Kroah-Hartman
2013-12-06 21:51 ` [PATCH 3.12 68/83] HID: hid-elo: some systems cannot stomach work around Greg Kroah-Hartman
2013-12-06 21:51 ` [PATCH 3.12 69/83] iommu/vt-d: Fixed interaction of VFIO_IOMMU_MAP_DMA with IOMMU address limits Greg Kroah-Hartman
2013-12-06 21:52 ` [PATCH 3.12 70/83] iommu: Remove stack trace from broken irq remapping warning Greg Kroah-Hartman
2013-12-06 21:52 ` [PATCH 3.12 71/83] rt2800: add support for radio chip RF3070 Greg Kroah-Hartman
2013-12-06 21:52 ` [PATCH 3.12 72/83] elevator: Fix a race in elevator switching and md device initialization Greg Kroah-Hartman
2013-12-06 21:52 ` [PATCH 3.12 73/83] elevator: acquire q->sysfs_lock in elevator_change() Greg Kroah-Hartman
2013-12-06 21:52 ` [PATCH 3.12 74/83] ntp: Make periodic RTC update more reliable Greg Kroah-Hartman
2013-12-06 21:52 ` [PATCH 3.12 75/83] aio: Fix a trinity splat Greg Kroah-Hartman
2013-12-06 21:52 ` [PATCH 3.12 76/83] take anon inode allocation to libfs.c Greg Kroah-Hartman
2013-12-06 21:52 ` [PATCH 3.12 77/83] rework aio migrate pages to use aio fs Greg Kroah-Hartman
2013-12-06 21:52 ` [PATCH 3.12 78/83] aio: checking for NULL instead of IS_ERR Greg Kroah-Hartman
2013-12-06 21:52 ` [PATCH 3.12 79/83] aio: prevent double free in ioctx_alloc Greg Kroah-Hartman
2013-12-06 21:52 ` [PATCH 3.12 80/83] aio: nullify aio->ring_pages after freeing it Greg Kroah-Hartman
2013-12-06 21:52 ` [PATCH 3.12 81/83] aio: clean up aio ring in the fail path Greg Kroah-Hartman
2013-12-06 21:52 ` [PATCH 3.12 82/83] drm/radeon/audio: improve ACR calculation Greg Kroah-Hartman
2013-12-06 21:52 ` [PATCH 3.12 83/83] drm/radeon/audio: correct ACR table Greg Kroah-Hartman
2013-12-06 22:52 ` [PATCH 3.12 00/83] 3.12.4-stable review Holger Hoffstätte
2013-12-07 17:01 ` Greg KH
2013-12-07 6:44 ` Guenter Roeck
2013-12-07 17:00 ` Greg Kroah-Hartman
2013-12-07 22:15 ` Shuah Khan
2013-12-07 23:17 ` Greg Kroah-Hartman
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