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Daniel Borkmann ffd5939381 net: sctp: fix sctp_connectx abi for ia32 emulation/compat mode 
SCTP's sctp_connectx() abi breaks for 64bit kernels compiled with 32bit
emulation (e.g. ia32 emulation or x86_x32). Due to internal usage of
'struct sctp_getaddrs_old' which includes a struct sockaddr pointer,
sizeof(param) check will always fail in kernel as the structure in
64bit kernel space is 4bytes larger than for user binaries compiled
in 32bit mode. Thus, applications making use of sctp_connectx() won't
be able to run under such circumstances.

Introduce a compat interface in the kernel to deal with such
situations by using a 'struct compat_sctp_getaddrs_old' structure
where user data is copied into it, and then sucessively transformed
into a 'struct sctp_getaddrs_old' structure with the help of
compat_ptr(). That fixes sctp_connectx() abi without any changes
needed in user space, and lets the SCTP test suite pass when compiled
in 32bit and run on 64bit kernels.

Fixes: f9c67811eb ("sctp: Fix regression introduced by new sctp_connectx api")
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Acked-by: Vlad Yasevich <vyasevich@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-02-18 16:06:48 -05:00
..
9p 9p/trans_virtio.c: Fix broken zero-copy on vmalloc() buffers 2014-02-10 17:48:54 -08:00
802 neigh: use NEIGH_VAR_INIT in ndo_neigh_setup functions. 2014-01-16 11:31:58 -08:00
8021q 8021q: Use ether_addr_copy 2014-01-21 18:13:04 -08:00
appletalk net: Fix some fallout from the etner_addr_copy() changes. 2014-01-21 18:57:26 -08:00
atm net: Fix some fallout from the etner_addr_copy() changes. 2014-01-21 18:57:26 -08:00
ax25 net: add build-time checks for msg->msg_name size 2014-01-18 23:04:16 -08:00
batman-adv batman-adv: fix potential kernel paging error for unicast transmissions 2014-02-17 17:17:02 +01:00
bluetooth net: add build-time checks for msg->msg_name size 2014-01-18 23:04:16 -08:00
bridge bridge: Prevent possible race condition in br_fdb_change_mac_address 2014-02-10 14:34:34 -08:00
caif net: Include appropriate header file in caif/cfsrvl.c 2014-02-09 17:32:49 -08:00
can linux-can-fixes-for-3.14-20140129 2014-01-30 16:48:17 -08:00
ceph libceph: do not dereference a NULL bio pointer 2014-02-07 11:37:07 -08:00
core netdevice: move netdev_cap_txqueue for shared usage to header 2014-02-17 00:36:34 -05:00
dcb dcb: use __dev_get_by_name instead of dev_get_by_name to find interface 2014-01-14 18:50:46 -08:00
dccp dccp: re-enable debug macro 2014-02-16 23:45:00 -05:00
decnet net: Move prototype declaration to header file include/net/dn.h from net/decnet/af_decnet.c 2014-02-09 17:32:49 -08:00
dns_resolver net/*: Fix FSF address in file headers 2013-12-06 12:37:57 -05:00
dsa dsa: Use ether_addr_copy 2014-01-21 18:13:05 -08:00
ethernet net: eth_type_trans() should use skb_header_pointer() 2014-01-16 15:30:31 -08:00
hsr net/hsr: using kfree_rcu() to simplify the code 2013-12-17 16:32:30 -05:00
ieee802154 6lowpan: fix lockdep splats 2014-02-10 17:51:29 -08:00
ipv4 ipv4: fix counter in_slow_tot 2014-02-17 16:54:42 -05:00
ipv6 gre: add link local route when local addr is any 2014-02-17 14:08:26 -05:00
ipx net: Move prototype declaration to header file include/net/net_namespace.h from net/ipx/af_ipx.c 2014-02-09 17:32:50 -08:00
irda net: add build-time checks for msg->msg_name size 2014-01-18 23:04:16 -08:00
iucv net: rework recvmsg handler msg_name and msg_namelen logic 2013-11-20 21:52:30 -05:00
key xfrm: export verify_userspi_info for pkfey and netlink interface 2013-12-16 12:54:02 +01:00
l2tp ipv6: protect protocols not handling ipv4 from v4 connection/bind attempts 2014-01-21 16:59:19 -08:00
lapb
llc llc: remove noisy WARN from llc_mac_hdr_init 2014-01-28 18:01:32 -08:00
mac80211 netdevice: add queue selection fallback handler for ndo_select_queue 2014-02-17 00:36:34 -05:00
mac802154 mac802154: fix following checkpath.pl warning Prefer pr_warn(... to pr_warning(... 2013-12-22 18:53:08 -05:00
mpls ipip: add GSO/TSO support 2013-10-19 19:36:19 -04:00
netfilter net: Include appropriate header file in netfilter/nft_lookup.c 2014-02-09 17:32:50 -08:00
netlabel netlabel: Fix FSF address in file headers 2013-12-06 12:37:56 -05:00
netlink net: add build-time checks for msg->msg_name size 2014-01-18 23:04:16 -08:00
netrom net: add build-time checks for msg->msg_name size 2014-01-18 23:04:16 -08:00
nfc Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2014-01-25 11:17:34 -08:00
openvswitch openvswitch: Suppress error messages on megaflow updates 2014-02-04 22:32:38 -08:00
packet packet: check for ndo_select_queue during queue selection 2014-02-17 00:36:34 -05:00
phonet net: add build-time checks for msg->msg_name size 2014-01-18 23:04:16 -08:00
rds net: add build-time checks for msg->msg_name size 2014-01-18 23:04:16 -08:00
rfkill Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2014-01-25 11:17:34 -08:00
rose net: add build-time checks for msg->msg_name size 2014-01-18 23:04:16 -08:00
rxrpc RxRPC fixes 2014-01-28 18:04:18 -08:00
sched net: sched: Cleanup PIE comments 2014-02-13 18:29:58 -05:00
sctp net: sctp: fix sctp_connectx abi for ia32 emulation/compat mode 2014-02-18 16:06:48 -05:00
sunrpc Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2014-02-11 12:05:55 -08:00
tipc tipc: fix message corruption bug for deferred packets 2014-02-13 16:35:05 -05:00
unix net: add build-time checks for msg->msg_name size 2014-01-18 23:04:16 -08:00
vmw_vsock net: add build-time checks for msg->msg_name size 2014-01-18 23:04:16 -08:00
wimax wimax: remove dead code 2013-11-21 13:09:42 -05:00
wireless cfg80211: send scan results from work queue 2014-02-06 09:55:19 +01:00
x25 net: add build-time checks for msg->msg_name size 2014-01-18 23:04:16 -08:00
xfrm Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2014-01-25 11:17:34 -08:00
compat.c x86, x32: Correct invalid use of user timespec in the kernel 2014-01-30 18:44:13 -08:00
Kconfig net: netprio: rename config to be more consistent with cgroup configs 2014-01-03 23:41:42 +01:00
Makefile net: move 6lowpan compression code to separate module 2014-01-15 15:36:38 -08:00
nonet.c
socket.c net: handle error more gracefully in socketpair() 2013-12-10 22:24:13 -05:00
sysctl_net.c