Nikolay Aleksandrov 52a4c6404f
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 >
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