linux/net/sctp
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
..
associola.c net: sctp: Fix a_rwnd/rwnd management to reflect real state of the receiver's buffer 2014-02-17 00:16:56 -05:00
auth.c sctp: fix checkpatch errors with open brace '{' and trailing statements 2013-12-26 13:47:48 -05:00
bind_addr.c sctp: Fix FSF address in file headers 2013-12-06 12:37:56 -05:00
chunk.c sctp: fix checkpatch errors with space required or prohibited 2013-12-26 13:47:47 -05:00
command.c sctp: Fix FSF address in file headers 2013-12-06 12:37:56 -05:00
debug.c sctp: Fix FSF address in file headers 2013-12-06 12:37:56 -05:00
endpointola.c sctp: remove macros sctp_local_bh_{disable|enable} 2014-01-21 18:40:40 -08:00
input.c sctp: remove macros sctp_bh_[un]lock_sock 2014-01-21 18:41:36 -08:00
inqueue.c sctp: Fix FSF address in file headers 2013-12-06 12:37:56 -05:00
ipv6.c net: sctp: fix initialization of local source address on accepted ipv6 sockets 2014-02-06 21:18:06 -08:00
Kconfig net: sctp: get rid of SCTP_DBG_TSNS entirely 2013-07-02 00:08:03 -07:00
Makefile sctp: implement sctp association probing module 2010-04-30 22:41:09 -04:00
objcnt.c sctp: fix checkpatch errors with (foo*)|foo * bar|foo* bar 2013-12-26 13:47:47 -05:00
output.c sctp: move skb_dst_set() a bit downwards in sctp_packet_transmit() 2013-12-31 14:31:44 -05:00
outqueue.c Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2014-01-06 17:37:45 -05:00
primitive.c sctp: Fix FSF address in file headers 2013-12-06 12:37:56 -05:00
probe.c sctp: loading sctp when load sctp_probe 2013-12-16 20:04:27 -05:00
proc.c sctp: remove macros sctp_local_bh_{disable|enable} 2014-01-21 18:40:40 -08:00
protocol.c sctp: remove macros sctp_bh_[un]lock_sock 2014-01-21 18:41:36 -08:00
sm_make_chunk.c sctp: make sctp_addto_chunk_fixed local 2014-01-13 14:42:30 -08:00
sm_sideeffect.c sctp: remove macros sctp_bh_[un]lock_sock 2014-01-21 18:41:36 -08:00
sm_statefuns.c net: sctp: Fix a_rwnd/rwnd management to reflect real state of the receiver's buffer 2014-02-17 00:16:56 -05:00
sm_statetable.c sctp: fix checkpatch errors with indent 2013-12-26 13:47:48 -05:00
socket.c net: sctp: fix sctp_connectx abi for ia32 emulation/compat mode 2014-02-18 16:06:48 -05:00
ssnmap.c sctp: Fix FSF address in file headers 2013-12-06 12:37:56 -05:00
sysctl.c sctp: optimize the sctp_sysctl_net_register 2014-02-13 17:08:29 -05:00
transport.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2013-12-09 20:20:14 -05:00
tsnmap.c sctp: Fix FSF address in file headers 2013-12-06 12:37:56 -05:00
ulpevent.c net: sctp: Fix a_rwnd/rwnd management to reflect real state of the receiver's buffer 2014-02-17 00:16:56 -05:00
ulpqueue.c sctp: fix checkpatch errors with open brace '{' and trailing statements 2013-12-26 13:47:48 -05:00