selinux: add gfp argument to security_xfrm_policy_alloc and fix callers
authorNikolay Aleksandrov <nikolay@redhat.com>
Fri, 7 Mar 2014 11:44:19 +0000 (12:44 +0100)
committerSteffen Klassert <steffen.klassert@secunet.com>
Mon, 10 Mar 2014 07:30:02 +0000 (08:30 +0100)
commit52a4c6404f91f2d2c5592ee6365a8418c4565f53
treec88320060de9b18fbe345a46dc9d91eecb92dde9
parent87536a81e1f52409b45333ce8cac415a1218163c
selinux: add gfp argument to security_xfrm_policy_alloc and fix callers

security_xfrm_policy_alloc can be called in atomic context so the
allocation should be done with GFP_ATOMIC. Add an argument to let the
callers choose the appropriate way. In order to do so a gfp argument
needs to be added to the method xfrm_policy_alloc_security in struct
security_operations and to the internal function
selinux_xfrm_alloc_user. After that switch to GFP_ATOMIC in the atomic
callers and leave GFP_KERNEL as before for the rest.
The path that needed the gfp argument addition is:
security_xfrm_policy_alloc -> security_ops.xfrm_policy_alloc_security ->
all users of xfrm_policy_alloc_security (e.g. selinux_xfrm_policy_alloc) ->
selinux_xfrm_alloc_user (here the allocation used to be GFP_KERNEL only)

Now adding a gfp argument to selinux_xfrm_alloc_user requires us to also
add it to security_context_to_sid which is used inside and prior to this
patch did only GFP_KERNEL allocation. So add gfp argument to
security_context_to_sid and adjust all of its callers as well.

CC: Paul Moore <paul@paul-moore.com>
CC: Dave Jones <davej@redhat.com>
CC: Steffen Klassert <steffen.klassert@secunet.com>
CC: Fan Du <fan.du@windriver.com>
CC: David S. Miller <davem@davemloft.net>
CC: LSM list <linux-security-module@vger.kernel.org>
CC: SELinux list <selinux@tycho.nsa.gov>
Signed-off-by: Nikolay Aleksandrov <nikolay@redhat.com>
Acked-by: Paul Moore <paul@paul-moore.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
include/linux/security.h
net/key/af_key.c
net/xfrm/xfrm_user.c
security/capability.c
security/security.c
security/selinux/hooks.c
security/selinux/include/security.h
security/selinux/include/xfrm.h
security/selinux/selinuxfs.c
security/selinux/ss/services.c
security/selinux/xfrm.c