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authorEric Paris <eparis@redhat.com>2010-07-30 07:02:34 +0400
committerJames Morris <jmorris@namei.org>2010-08-02 09:38:39 +0400
commit6371dcd36f649d9d07823f31400618155a20dde1 (patch)
treea08c4ed2ec77225abbfcc099e78ae8d643429787 /security/apparmor/ipc.c
parent016d825fe02cd20fd8803ca37a1e6d428fe878f6 (diff)
downloadlinux-6371dcd36f649d9d07823f31400618155a20dde1.tar.xz
selinux: convert the policy type_attr_map to flex_array
Current selinux policy can have over 3000 types. The type_attr_map in policy is an array sized by the number of types times sizeof(struct ebitmap) (12 on x86_64). Basic math tells us the array is going to be of length 3000 x 12 = 36,000 bytes. The largest 'safe' allocation on a long running system is 16k. Most of the time a 32k allocation will work. But on long running systems a 64k allocation (what we need) can fail quite regularly. In order to deal with this I am converting the type_attr_map to use flex_arrays. Let the library code deal with breaking this into PAGE_SIZE pieces. -v2 rework some of the if(!obj) BUG() to be BUG_ON(!obj) drop flex_array_put() calls and just use a _get() object directly -v3 make apply to James' tree (drop the policydb_write changes) Signed-off-by: Eric Paris <eparis@redhat.com> Acked-by: Stephen D. Smalley <sds@tycho.nsa.gov> Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'security/apparmor/ipc.c')
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