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2011-12-19selinux: Casting (void *) value returned by kmalloc is uselessThomas Meyer1-1/+1
The semantic patch that makes this change is available in scripts/coccinelle/api/alloc/drop_kmalloc_cast.cocci. Signed-off-by: Thomas Meyer <thomas@m3y3r.de> Signed-off-by: James Morris <jmorris@namei.org>
2011-09-09selinux: sparse fix: fix several warnings in the security server codeJames Morris3-3/+2
Fix several sparse warnings in the SELinux security server code. Signed-off-by: James Morris <jmorris@namei.org>
2011-09-09selinux: sparse fix: fix warnings in netlink codeJames Morris1-2/+0
Fix sparse warnings in SELinux Netlink code. Signed-off-by: James Morris <jmorris@namei.org>
2011-09-09selinux: sparse fix: move selinux_complete_initJames Morris1-1/+0
Sparse fix: move selinux_complete_init Signed-off-by: James Morris <jmorris@namei.org>
2011-08-01doc: Update the email address for Paul Moore in various source filesPaul Moore5-5/+5
My @hp.com will no longer be valid starting August 5, 2011 so an update is necessary. My new email address is employer independent so we don't have to worry about doing this again any time soon. Signed-off-by: Paul Moore <paul.moore@hp.com> Signed-off-by: Paul Moore <paul@paul-moore.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-06-15Merge branch 'for-linus' of git://git.infradead.org/users/eparis/selinux ↵James Morris1-0/+3
into for-linus
2011-06-14SELinux: skip file_name_trans_write() when policy downgraded.Roy.Li1-0/+3
When policy version is less than POLICYDB_VERSION_FILENAME_TRANS, skip file_name_trans_write(). Signed-off-by: Roy.Li <rongqing.li@windriver.com> Signed-off-by: Eric Paris <eparis@redhat.com>
2011-05-26selinux: don't pass in NULL avd to avc_has_perm_noauditLinus Torvalds1-1/+2
Right now security_get_user_sids() will pass in a NULL avd pointer to avc_has_perm_noaudit(), which then forces that function to have a dummy entry for that case and just generally test it. Don't do it. The normal callers all pass a real avd pointer, and this helper function is incredibly hot. So don't make avc_has_perm_noaudit() do conditional stuff that isn't needed for the common case. This also avoids some duplicated stack space. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-05-26Merge commit 'v2.6.39' into 20110526Eric Paris1-2/+2
Conflicts: lib/flex_array.c security/selinux/avc.c security/selinux/hooks.c security/selinux/ss/policydb.c security/smack/smack_lsm.c
2011-05-24Merge branch 'master' of git://git.infradead.org/users/eparis/selinux into ↵James Morris3-111/+217
for-linus Conflicts: lib/flex_array.c security/selinux/avc.c security/selinux/hooks.c security/selinux/ss/policydb.c security/smack/smack_lsm.c Manually resolve conflicts. Signed-off-by: James Morris <jmorris@namei.org>
2011-05-13Merge branch 'for-linus' of git://git.infradead.org/users/eparis/selinux ↵James Morris1-4/+0
into for-linus
2011-05-12SELinux: delete debugging printks from filename_trans rule processingEric Paris1-4/+0
The filename_trans rule processing has some printk(KERN_ERR ) messages which were intended as debug aids in creating the code but weren't removed before it was submitted. Remove them. Reported-by: Paul Bolle <pebolle@tiscali.nl> Signed-off-by: Eric Paris <eparis@redhat.com>
2011-05-04Merge branch 'for-linus' of git://git.infradead.org/users/eparis/selinux ↵James Morris1-3/+3
into for-linus
2011-04-28flex_array: flex_array_prealloc takes a number of elements, not an endEric Paris1-3/+3
Change flex_array_prealloc to take the number of elements for which space should be allocated instead of the last (inclusive) element. Users and documentation are updated accordingly. flex_arrays got introduced before they had users. When folks started using it, they ended up needing a different API than was coded up originally. This swaps over to the API that folks apparently need. Based-on-patch-by: Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by: Eric Paris <eparis@redhat.com> Tested-by: Chris Richards <gizmo@giz-works.com> Acked-by: Dave Hansen <dave@linux.vnet.ibm.com> Cc: stable@kernel.org [2.6.38+]
2011-04-28flex_array: flex_array_prealloc takes a number of elements, not an endEric Paris1-3/+3
Change flex_array_prealloc to take the number of elements for which space should be allocated instead of the last (inclusive) element. Users and documentation are updated accordingly. flex_arrays got introduced before they had users. When folks started using it, they ended up needing a different API than was coded up originally. This swaps over to the API that folks apparently need. Based-on-patch-by: Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by: Eric Paris <eparis@redhat.com> Tested-by: Chris Richards <gizmo@giz-works.com> Acked-by: Dave Hansen <dave@linux.vnet.ibm.com> Cc: stable@kernel.org [2.6.38+]
2011-04-28SELinux: put name based create rules in a hashtableEric Paris3-61/+135
To shorten the list we need to run if filename trans rules exist for the type of the given parent directory I put them in a hashtable. Given the policy we are expecting to use in Fedora this takes the worst case list run from about 5,000 entries to 17. Signed-off-by: Eric Paris <eparis@redhat.com> Reviewed-by: James Morris <jmorris@namei.org>
2011-04-28SELinux: generic hashtab entry counterEric Paris1-2/+2
Instead of a hashtab entry counter function only useful for range transition rules make a function generic for any hashtable to use. Signed-off-by: Eric Paris <eparis@redhat.com> Reviewed-by: James Morris <jmorris@namei.org>
2011-04-28SELinux: calculate and print hashtab stats with a generic functionEric Paris1-19/+13
We have custom debug functions like rangetr_hash_eval and symtab_hash_eval which do the same thing. Just create a generic function that takes the name of the hash table as an argument instead of having custom functions. Signed-off-by: Eric Paris <eparis@redhat.com> Reviewed-by: James Morris <jmorris@namei.org>
2011-04-28SELinux: skip filename trans rules if ttype does not match parent dirEric Paris3-0/+17
Right now we walk to filename trans rule list for every inode that is created. First passes at policy using this facility creates around 5000 filename trans rules. Running a list of 5000 entries every time is a bad idea. This patch adds a new ebitmap to policy which has a bit set for each ttype that has at least 1 filename trans rule. Thus when an inode is created we can quickly determine if any rules exist for this parent directory type and can skip the list if we know there is definitely no relevant entry. Signed-off-by: Eric Paris <eparis@redhat.com> Reviewed-by: James Morris <jmorris@namei.org>
2011-04-28SELinux: rename filename_compute_type argument to *type instead of *conEric Paris1-3/+3
filename_compute_type() takes as arguments the numeric value of the type of the subject and target. It does not take a context. Thus the names are misleading. Fix the argument names. Signed-off-by: Eric Paris <eparis@redhat.com> Reviewed-by: James Morris <jmorris@namei.org>
2011-04-28SELinux: fix comment to state filename_compute_type takes an objname not a qstrEric Paris1-1/+1
filename_compute_type used to take a qstr, but it now takes just a name. Fix the comments to indicate it is an objname, not a qstr. Signed-off-by: Eric Paris <eparis@redhat.com>
2011-04-25SELinux: security_read_policy should take a size_t not ssize_tEric Paris1-1/+1
The len should be an size_t but is a ssize_t. Easy enough fix to silence build warnings. We have no need for signed-ness. Signed-off-by: Eric Paris <eparis@redhat.com> Reviewed-by: James Morris <jmorris@namei.org>
2011-04-20SELinux: delete debugging printks from filename_trans rule processingEric Paris1-4/+0
The filename_trans rule processing has some printk(KERN_ERR ) messages which were intended as debug aids in creating the code but weren't removed before it was submitted. Remove them. Signed-off-by: Eric Paris <eparis@redhat.com>
2011-04-07Initialize policydb.process_class eariler.Harry Ciao1-5/+5
Initialize policydb.process_class once all symtabs read from policy image, so that it could be used to setup the role_trans.tclass field when a lower version policy.X is loaded. Signed-off-by: Harry Ciao <qingtao.cao@windriver.com> Signed-off-by: Eric Paris <eparis@redhat.com>
2011-04-07selinux: Fix regression for XorgStephen Smalley1-1/+1
Commit 6f5317e730505d5cbc851c435a2dfe3d5a21d343 introduced a bug in the handling of userspace object classes that is causing breakage for Xorg when XSELinux is enabled. Fix the bug by changing map_class() to return SECCLASS_NULL when the class cannot be mapped to a kernel object class. Reported-by: "Justin P. Mattock" <justinmattock@gmail.com> Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov> Signed-off-by: James Morris <jmorris@namei.org>
2011-04-01selinux: add type_transition with name extension support for selinuxfsKohei Kaigai1-8/+9
The attached patch allows /selinux/create takes optional 4th argument to support TYPE_TRANSITION with name extension for userspace object managers. If 4th argument is not supplied, it shall perform as existing kernel. In fact, the regression test of SE-PostgreSQL works well on the patched kernel. Thanks, Signed-off-by: KaiGai Kohei <kohei.kaigai@eu.nec.com> [manually verify fuzz was not an issue, and it wasn't: eparis] Signed-off-by: Eric Paris <eparis@redhat.com>
2011-03-31Fix common misspellingsLucas De Marchi1-2/+2
Fixes generated by 'codespell' and manually reviewed. Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
2011-03-29selinux: Fix regression for XorgStephen Smalley1-1/+1
Commit 6f5317e730505d5cbc851c435a2dfe3d5a21d343 introduced a bug in the handling of userspace object classes that is causing breakage for Xorg when XSELinux is enabled. Fix the bug by changing map_class() to return SECCLASS_NULL when the class cannot be mapped to a kernel object class. Reported-by: "Justin P. Mattock" <justinmattock@gmail.com> Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov> Signed-off-by: James Morris <jmorris@namei.org>
2011-03-28SELinux: Write class field in role_trans_write.Harry Ciao1-2/+9
If kernel policy version is >= 26, then write the class field of the role_trans structure into the binary reprensentation. Signed-off-by: Harry Ciao <qingtao.cao@windriver.com> Acked-by: Stephen Smalley <sds@tycho.nsa.gov> Signed-off-by: Eric Paris <eparis@redhat.com>
2011-03-28SELinux: Compute role in newcontext for all classesHarry Ciao1-11/+9
Apply role_transition rules for all kinds of classes. Signed-off-by: Harry Ciao <qingtao.cao@windriver.com> Acked-by: Stephen Smalley <sds@tycho.nsa.gov> Signed-off-by: Eric Paris <eparis@redhat.com>
2011-03-28SELinux: Add class support to the role_trans structureHarry Ciao2-1/+16
If kernel policy version is >= 26, then the binary representation of the role_trans structure supports specifying the class for the current subject or the newly created object. If kernel policy version is < 26, then the class field would be default to the process class. Signed-off-by: Harry Ciao <qingtao.cao@windriver.com> Acked-by: Stephen Smalley <sds@tycho.nsa.gov> Signed-off-by: Eric Paris <eparis@redhat.com>
2011-03-08Merge branch 'master' of git://git.infradead.org/users/eparis/selinux into nextJames Morris6-33/+214
2011-03-08Merge branch 'master'; commit 'v2.6.38-rc7' into nextJames Morris2-3/+3
2011-03-03SELinux: Socket retains creator role and MLS attributeHarry Ciao3-7/+29
The socket SID would be computed on creation and no longer inherit its creator's SID by default. Socket may have a different type but needs to retain the creator's role and MLS attribute in order not to break labeled networking and network access control. The kernel value for a class would be used to determine if the class if one of socket classes. If security_compute_sid is called from userspace the policy value for a class would be mapped to the relevant kernel value first. Signed-off-by: Harry Ciao <qingtao.cao@windriver.com> Signed-off-by: Eric Paris <eparis@redhat.com> Acked-by: Stephen Smalley <sds@tycho.nsa.gov>
2011-02-01SELinux: Use dentry name in new object labelingEric Paris4-26/+185
Currently SELinux has rules which label new objects according to 3 criteria. The label of the process creating the object, the label of the parent directory, and the type of object (reg, dir, char, block, etc.) This patch adds a 4th criteria, the dentry name, thus we can distinguish between creating a file in an etc_t directory called shadow and one called motd. There is no file globbing, regex parsing, or anything mystical. Either the policy exactly (strcmp) matches the dentry name of the object or it doesn't. This patch has no changes from today if policy does not implement the new rules. Signed-off-by: Eric Paris <eparis@redhat.com>
2011-01-24selinux: return -ENOMEM when memory allocation failsDavidlohr Bueso2-3/+3
Return -ENOMEM when memory allocation fails in cond_init_bool_indexes, correctly propagating error code to caller. Signed-off-by: Davidlohr Bueso <dave@gnu.org> Signed-off-by: James Morris <jmorris@namei.org>
2011-01-24security:selinux: kill unused MAX_AVTAB_HASH_MASK and ebitmap_startbitShan Wei2-2/+0
Kill unused MAX_AVTAB_HASH_MASK and ebitmap_startbit. Signed-off-by: Shan Wei <shanwei@cn.fujitsu.com> Signed-off-by: James Morris <jmorris@namei.org>
2010-12-07selinux: cache sidtab_context_to_sid resultsEric Paris2-2/+39
sidtab_context_to_sid takes up a large share of time when creating large numbers of new inodes (~30-40% in oprofile runs). This patch implements a cache of 3 entries which is checked before we do a full context_to_sid lookup. On one system this showed over a x3 improvement in the number of inodes that could be created per second and around a 20% improvement on another system. Any time we look up the same context string sucessivly (imagine ls -lZ) we should hit this cache hot. A cache miss should have a relatively minor affect on performance next to doing the full table search. All operations on the cache are done COMPLETELY lockless. We know that all struct sidtab_node objects created will never be deleted until a new policy is loaded thus we never have to worry about a pointer being dereferenced. Since we also know that pointer assignment is atomic we know that the cache will always have valid pointers. Given this information we implement a FIFO cache in an array of 3 pointers. Every result (whether a cache hit or table lookup) will be places in the 0 spot of the cache and the rest of the entries moved down one spot. The 3rd entry will be lost. Races are possible and are even likely to happen. Lets assume that 4 tasks are hitting sidtab_context_to_sid. The first task checks against the first entry in the cache and it is a miss. Now lets assume a second task updates the cache with a new entry. This will push the first entry back to the second spot. Now the first task might check against the second entry (which it already checked) and will miss again. Now say some third task updates the cache and push the second entry to the third spot. The first task my check the third entry (for the third time!) and again have a miss. At which point it will just do a full table lookup. No big deal! Signed-off-by: Eric Paris <eparis@redhat.com>
2010-11-30SELinux: merge policydb_index_classes and policydb_index_othersEric Paris1-59/+10
We duplicate functionality in policydb_index_classes() and policydb_index_others(). This patch merges those functions just to make it clear there is nothing special happening here. Signed-off-by: Eric Paris <eparis@redhat.com>
2010-11-30selinux: convert part of the sym_val_to_name array to use flex_arrayEric Paris5-68/+127
The sym_val_to_name type array can be quite large as it grows linearly with the number of types. With known policies having over 5k types these allocations are growing large enough that they are likely to fail. Convert those to flex_array so no allocation is larger than PAGE_SIZE Signed-off-by: Eric Paris <eparis@redhat.com>
2010-11-30selinux: convert type_val_to_struct to flex_arrayEric Paris3-13/+34
In rawhide type_val_to_struct will allocate 26848 bytes, an order 3 allocations. While this hasn't been seen to fail it isn't outside the realm of possibiliy on systems with severe memory fragmentation. Convert to flex_array so no allocation will ever be bigger than PAGE_SIZE. Signed-off-by: Eric Paris <eparis@redhat.com>
2010-11-30selinux: rework security_netlbl_secattr_to_sidEric Paris1-21/+21
security_netlbl_secattr_to_sid is difficult to follow, especially the return codes. Try to make the function obvious. Signed-off-by: Eric Paris <eparis@redhat.com>
2010-11-30SELinux: standardize return code handling in selinuxfs.cEric Paris1-171/+157
selinuxfs.c has lots of different standards on how to handle return paths on error. For the most part transition to rc=errno if (failure) goto out; [...] out: cleanup() return rc; Instead of doing cleanup mid function, or having multiple returns or other options. This doesn't do that for every function, but most of the complex functions which have cleanup routines on error. Signed-off-by: Eric Paris <eparis@redhat.com>
2010-11-30SELinux: standardize return code handling in policydb.cEric Paris1-287/+268
policydb.c has lots of different standards on how to handle return paths on error. For the most part transition to rc=errno if (failure) goto out; [...] out: cleanup() return rc; Instead of doing cleanup mid function, or having multiple returns or other options. This doesn't do that for every function, but most of the complex functions which have cleanup routines on error. Signed-off-by: Eric Paris <eparis@redhat.com>
2010-10-21selinux: include vmalloc.h for vmalloc_userStephen Rothwell1-0/+1
Include vmalloc.h for vmalloc_user (fixes ppc build warning). Acked-by: Eric Paris <eparis@redhat.com> Signed-off-by: James Morris <jmorris@namei.org>
2010-10-21selinux: implement mmap on /selinux/policyEric Paris1-1/+1
/selinux/policy allows a user to copy the policy back out of the kernel. This patch allows userspace to actually mmap that file and use it directly. Signed-off-by: Eric Paris <eparis@redhat.com> Signed-off-by: James Morris <jmorris@namei.org>
2010-10-21SELinux: allow userspace to read policy back out of the kernelEric Paris9-2/+1158
There is interest in being able to see what the actual policy is that was loaded into the kernel. The patch creates a new selinuxfs file /selinux/policy which can be read by userspace. The actual policy that is loaded into the kernel will be written back out to userspace. Signed-off-by: Eric Paris <eparis@redhat.com> Signed-off-by: James Morris <jmorris@namei.org>
2010-10-21SELinux: drop useless (and incorrect) AVTAB_MAX_SIZEEric Paris2-3/+2
AVTAB_MAX_SIZE was a define which was supposed to be used in userspace to define a maximally sized avtab when userspace wasn't sure how big of a table it needed. It doesn't make sense in the kernel since we always know our table sizes. The only place it is used we have a more appropiately named define called AVTAB_MAX_HASH_BUCKETS, use that instead. Signed-off-by: Eric Paris <eparis@redhat.com> Signed-off-by: James Morris <jmorris@namei.org>
2010-10-21SELinux: deterministic ordering of range transition rulesEric Paris1-3/+13
Range transition rules are placed in the hash table in an (almost) arbitrary order. This patch inserts them in a fixed order to make policy retrival more predictable. Signed-off-by: Eric Paris <eparis@redhat.com> Signed-off-by: James Morris <jmorris@namei.org>
2010-10-21security: secid_to_secctx returns len when data is NULLEric Paris1-2/+9
With the (long ago) interface change to have the secid_to_secctx functions do the string allocation instead of having the caller do the allocation we lost the ability to query the security server for the length of the upcoming string. The SECMARK code would like to allocate a netlink skb with enough length to hold the string but it is just too unclean to do the string allocation twice or to do the allocation the first time and hold onto the string and slen. This patch adds the ability to call security_secid_to_secctx() with a NULL data pointer and it will just set the slen pointer. Signed-off-by: Eric Paris <eparis@redhat.com> Reviewed-by: Paul Moore <paul.moore@hp.com> Signed-off-by: James Morris <jmorris@namei.org>
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