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* SELinux: allow userspace to read policy back out of the kernelEric Paris2010-10-20
| | | | | | | | | | 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>
* SELinux: drop useless (and incorrect) AVTAB_MAX_SIZEEric Paris2010-10-20
| | | | | | | | | | | 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>
* selinux: cleanup return codes in avtab_read_item()Dan Carpenter2010-08-02
| | | | | | | | | | | | | | | | | | | | | The avtab_read_item() function tends to return -1 as a default error code which is wrong (-1 means -EPERM). I modified it to return appropriate error codes which is -EINVAL or the error code from next_entry() or insertf(). next_entry() returns -EINVAL. insertf() is a function pointer to either avtab_insert() or cond_insertf(). avtab_insert() returns -EINVAL, -ENOMEM, and -EEXIST. cond_insertf() currently returns -1, but I will fix it in a later patch. There is code in avtab_read() which translates the -1 returns from avtab_read_item() to -EINVAL. The translation is no longer needed, so I removed it. Signed-off-by: Dan Carpenter <error27@gmail.com> Acked-by: Stephen D. Smalley <sds@tycho.nsa.gov> Signed-off-by: James Morris <jmorris@namei.org>
* selinux: Unify for- and while-loop styleVesa-Matti Kari2008-08-14
| | | | | | | | | | Replace "thing != NULL" comparisons with just "thing" to make the code look more uniform (mixed styles were used even in the same source file). Signed-off-by: Vesa-Matti Kari <vmkari@cc.helsinki.fi> Acked-by: Stephen Smalley <sds@tycho.nsa.gov> Signed-off-by: James Morris <jmorris@namei.org>
* SELinux: trivial, remove unneeded local variableVesa-Matti J Kari2008-08-04
| | | | | | | | | | | Hello, Remove unneeded local variable: struct avtab_node *newnode Signed-off-by: Vesa-Matti Kari <vmkari@cc.helsinki.fi> Signed-off-by: James Morris <jmorris@namei.org>
* SELinux: keep the code clean formating and syntaxEric Paris2008-07-14
| | | | | | | | | | | | | | | Formatting and syntax changes whitespace, tabs to spaces, trailing space put open { on same line as struct def remove unneeded {} after if statements change printk("Lu") to printk("llu") convert asm/uaccess.h to linux/uaacess.h includes remove unnecessary asm/bug.h includes convert all users of simple_strtol to strict_strtol Signed-off-by: Eric Paris <eparis@redhat.com> Signed-off-by: James Morris <jmorris@namei.org>
* SELinux: clean up printksEric Paris2008-04-21
| | | | | | | | | | Make sure all printk start with KERN_* Make sure all printk end with \n Make sure all printk have the word 'selinux' in them Change "function name" to "%s", __func__ (found 2 wrong) Signed-off-by: Eric Paris <eparis@redhat.com> Signed-off-by: James Morris <jmorris@namei.org>
* SELinux: avtab.c whitespace, syntax, and static declaraction cleanupsEric Paris2008-04-21
| | | | | | | | | | | | | | | | | | | | This patch changes avtab.c to fix whitespace and syntax issues. Things that are fixed may include (does not not have to include) whitespace at end of lines spaces followed by tabs spaces used instead of tabs spacing around parenthesis locateion of { around struct and else clauses location of * in pointer declarations removal of initialization of static data to keep it in the right section useless {} in if statemetns useless checking for NULL before kfree fixing of the indentation depth of switch statements and any number of other things I forgot to mention Signed-off-by: Eric Paris <eparis@redhat.com> Signed-off-by: James Morris <jmorris@namei.org>
* SELinux: unify printk messagesJames Morris2008-04-18
| | | | | | | | Replace "security:" prefixes in printk messages with "SELinux" to help users identify the source of the messages. Also fix a couple of minor formatting issues. Signed-off-by: James Morris <jmorris@namei.org>
* security/selinux: Add missing "space"Joe Perches2008-01-24
| | | | | | | Add missing space. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: James Morris <jmorris@namei.org>
* SELinux: add more validity checks on policy loadStephen Smalley2007-11-07
| | | | | | | | | | Add more validity checks at policy load time to reject malformed policies and prevent subsequent out-of-range indexing when in permissive mode. Resolves the NULL pointer dereference reported in https://bugzilla.redhat.com/show_bug.cgi?id=357541. Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov> Signed-off-by: James Morris <jmorris@namei.org>
* SELinux: tune avtab to reduce memory usageYuichi Nakamura2007-10-16
| | | | | | | | | | | | This patch reduces memory usage of SELinux by tuning avtab. Number of hash slots in avtab was 32768. Unused slots used memory when number of rules is fewer. This patch decides number of hash slots dynamically based on number of rules. (chain length)^2 is also printed out in avtab_hash_eval to see standard deviation of avtab hash table. Signed-off-by: Yuichi Nakamura<ynakam@hitachisoft.jp> Acked-by: Stephen Smalley <sds@tycho.nsa.gov> Signed-off-by: James Morris <jmorris@namei.org>
* mm: Remove slab destructors from kmem_cache_create().Paul Mundt2007-07-19
| | | | | | | | | | | | | | Slab destructors were no longer supported after Christoph's c59def9f222d44bb7e2f0a559f2906191a0862d7 change. They've been BUGs for both slab and slub, and slob never supported them either. This rips out support for the dtor pointer from kmem_cache_create() completely and fixes up every single callsite in the kernel (there were about 224, not including the slab allocator definitions themselves, or the documentation references). Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* Reassign printk levels in selinux kernel codeEric Paris2007-02-26
| | | | | | | | | | | | | | | | | | | | | | | | Below is a patch which demotes many printk lines to KERN_DEBUG from KERN_INFO. It should help stop the spamming of logs with messages in which users are not interested nor is there any action that users should take. It also promotes some KERN_INFO to KERN_ERR such as when there are improper attempts to register/unregister security modules. A similar patch was discussed a while back on list: http://marc.theaimsgroup.com/?t=116656343500003&r=1&w=2 This patch addresses almost all of the issues raised. I believe the only advice not taken was in the demoting of messages related to undefined permissions and classes. Signed-off-by: Eric Paris <eparis@redhat.com> Acked-by: Stephen Smalley <sds@tycho.nsa.gov> security/selinux/hooks.c | 20 ++++++++++---------- security/selinux/ss/avtab.c | 2 +- security/selinux/ss/policydb.c | 6 +++--- security/selinux/ss/sidtab.c | 2 +- 4 files changed, 15 insertions(+), 15 deletions(-) Signed-off-by: James Morris <jmorris@namei.org>
* [PATCH] Transform kmem_cache_alloc()+memset(0) -> kmem_cache_zalloc().Robert P. J. Day2007-02-11
| | | | | | | | | | | | | | | | | | | | | | Replace appropriate pairs of "kmem_cache_alloc()" + "memset(0)" with the corresponding "kmem_cache_zalloc()" call. Signed-off-by: Robert P. J. Day <rpjday@mindspring.com> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Andi Kleen <ak@muc.de> Cc: Roland McGrath <roland@redhat.com> Cc: James Bottomley <James.Bottomley@steeleye.com> Cc: Greg KH <greg@kroah.com> Acked-by: Joel Becker <Joel.Becker@oracle.com> Cc: Steven Whitehouse <swhiteho@redhat.com> Cc: Jan Kara <jack@ucw.cz> Cc: Michael Halcrow <mhalcrow@us.ibm.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Stephen Smalley <sds@tycho.nsa.gov> Cc: James Morris <jmorris@namei.org> Cc: Chris Wright <chrisw@sous-sol.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [PATCH] slab: remove kmem_cache_tChristoph Lameter2006-12-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Replace all uses of kmem_cache_t with struct kmem_cache. The patch was generated using the following script: #!/bin/sh # # Replace one string by another in all the kernel sources. # set -e for file in `find * -name "*.c" -o -name "*.h"|xargs grep -l $1`; do quilt add $file sed -e "1,\$s/$1/$2/g" $file >/tmp/$$ mv /tmp/$$ $file quilt refresh done The script was run like this sh replace kmem_cache_t "struct kmem_cache" Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] slab: remove SLAB_KERNELChristoph Lameter2006-12-07
| | | | | | | | SLAB_KERNEL is an alias of GFP_KERNEL. Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] selinux: more ARRAY_SIZE cleanupsTobias Klauser2006-01-06
| | | | | | | | | | Further ARRAY_SIZE cleanups under security/selinux. Signed-off-by: Tobias Klauser <tklauser@nuerscht.ch> Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov> Acked-by: James Morris <jmorris@namei.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] selinux: endian notationsAlexey Dobriyan2005-09-05
| | | | | | | | This patch adds endian notations to the SELinux code. Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] selinux: Reduce memory use by avtabStephen Smalley2005-09-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch improves memory use by SELinux by both reducing the avtab node size and reducing the number of avtab nodes. The memory savings are substantial, e.g. on a 64-bit system after boot, James Morris reported the following data for the targeted and strict policies: #objs objsize kernmem Targeted: Before: 237888 40 9.1MB After: 19968 24 468KB Strict: Before: 571680 40 21.81MB After: 221052 24 5.06MB The improvement in memory use comes at a cost in the speed of security server computations of access vectors, but these computations are only required on AVC cache misses, and performance measurements by James Morris using a number of benchmarks have shown that the change does not cause any significant degradation. Note that a rebuilt policy via an updated policy toolchain (libsepol/checkpolicy) is required in order to gain the full benefits of this patch, although some memory savings benefits are immediately applied even to older policies (in particular, the reduction in avtab node size). Sources for the updated toolchain are presently available from the sourceforge CVS tree (http://sourceforge.net/cvs/?group_id=21266), and tarballs are available from http://www.flux.utah.edu/~sds. Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov> Signed-off-by: James Morris <jmorris@namei.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* Linux-2.6.12-rc2v2.6.12-rc2Linus Torvalds2005-04-16
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
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