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linux/net/xfrm
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Herbert Xu 543aabb7d1 ipsec: Fix aborted xfrm policy dump crash 
commit 1137b5e252 upstream.

An independent security researcher, Mohamed Ghannam, has reported
this vulnerability to Beyond Security's SecuriTeam Secure Disclosure
program.

The xfrm_dump_policy_done function expects xfrm_dump_policy to
have been called at least once or it will crash.  This can be
triggered if a dump fails because the target socket's receive
buffer is full.

This patch fixes it by using the cb->start mechanism to ensure that
the initialisation is always done regardless of the buffer situation.

Fixes: 12a169e7d8 ("ipsec: Put dumpers on the dump list")
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2017-11-02 09:49:15 +01:00
..
Kconfig net/xfrm: remove depends on CONFIG_EXPERIMENTAL 2013-01-11 11:40:03 -08:00
Makefile xfrm: make xfrm_algo.c a module 2012-05-15 13:13:34 -04:00
xfrm_algo.c xfrm: use IS_ENABLED() instead of checking for built-in or module 2016-09-10 21:19:11 -07:00
xfrm_hash.c net: allow GFP_HIGHMEM in __vmalloc() 2010-11-21 10:04:04 -08:00
xfrm_hash.h xfrm: hash prefixed policies based on preflen thresholds 2014-09-02 13:29:44 +02:00
xfrm_input.c net/xfrm_input: fix possible NULL deref of tunnel.ip6->parms.i_key 2016-08-11 13:15:57 +02:00
xfrm_ipcomp.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2013-11-04 13:48:30 -05:00
xfrm_output.c xfrm: Reset encapsulation field of the skb before transformation 2016-03-17 10:28:44 +01:00
xfrm_policy.c xfrm: policy: check policy direction value 2017-09-07 08:35:40 +02:00
xfrm_proc.c proc: Reduce cache miss in xfrm_statistics_seq_show 2016-09-30 01:50:45 -04:00
xfrm_replay.c xfrm: constify xfrm_replay structures 2016-08-10 11:18:49 +02:00
xfrm_state.c Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next 2016-09-24 08:18:19 -04:00
xfrm_sysctl.c net: xfrm: Change u32 sysctl entries to use proc_douintvec 2016-09-07 23:17:53 -07:00
xfrm_user.c ipsec: Fix aborted xfrm policy dump crash 2017-11-02 09:49:15 +01:00