diff options
| author | Hannes Frederic Sowa <hannes@stressinduktion.org> | 2013-11-23 00:46:12 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-12-08 07:29:13 -0800 |
| commit | d4cbc4a91331e0fa5819cdf4267be4f07185eef6 (patch) | |
| tree | 44f5f031625bf1effdbd869a22edc065a0e82de5 /include | |
| parent | 4d7aef1fc794bc093939f165ca5e78de7af01361 (diff) | |
inet: fix addr_len/msg->msg_namelen assignment in recv_error and rxpmtu functions
[ 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>
Diffstat (limited to 'include')
| -rw-r--r-- | include/net/ip.h | 2 | ||||
| -rw-r--r-- | include/net/ipv6.h | 6 | ||||
| -rw-r--r-- | include/net/ping.h | 3 |
3 files changed, 7 insertions, 4 deletions
diff --git a/include/net/ip.h b/include/net/ip.h index 5e5268807a1..301f10c9b56 100644 --- a/include/net/ip.h +++ b/include/net/ip.h @@ -464,7 +464,7 @@ extern int compat_ip_getsockopt(struct sock *sk, int level, 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, diff --git a/include/net/ipv6.h b/include/net/ipv6.h index bbf1c8fb851..1f96efd3081 100644 --- a/include/net/ipv6.h +++ b/include/net/ipv6.h @@ -802,8 +802,10 @@ extern int compat_ipv6_getsockopt(struct sock *sk, 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); diff --git a/include/net/ping.h b/include/net/ping.h index 5db0224b73a..2b496e9f9eb 100644 --- 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); |