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* tty: fix fu_list abuseNick Piggin2010-08-181-1/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | tty: fix fu_list abuse tty code abuses fu_list, which causes a bug in remount,ro handling. If a tty device node is opened on a filesystem, then the last link to the inode removed, the filesystem will be allowed to be remounted readonly. This is because fs_may_remount_ro does not find the 0 link tty inode on the file sb list (because the tty code incorrectly removed it to use for its own purpose). This can result in a filesystem with errors after it is marked "clean". Taking idea from Christoph's initial patch, allocate a tty private struct at file->private_data and put our required list fields in there, linking file and tty. This makes tty nodes behave the same way as other device nodes and avoid meddling with the vfs, and avoids this bug. The error handling is not trivial in the tty code, so for this bugfix, I take the simple approach of using __GFP_NOFAIL and don't worry about memory errors. This is not a problem because our allocator doesn't fail small allocs as a rule anyway. So proper error handling is left as an exercise for tty hackers. [ Arguably filesystem's device inode would ideally be divorced from the driver's pseudo inode when it is opened, but in practice it's not clear whether that will ever be worth implementing. ] Cc: linux-kernel@vger.kernel.org Cc: Christoph Hellwig <hch@infradead.org> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Nick Piggin <npiggin@kernel.dk> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* fs: cleanup files_lock lockingNick Piggin2010-08-181-2/+2
| | | | | | | | | | | | | | | fs: cleanup files_lock locking Lock tty_files with a new spinlock, tty_files_lock; provide helpers to manipulate the per-sb files list; unexport the files_lock spinlock. Cc: linux-kernel@vger.kernel.org Cc: Christoph Hellwig <hch@infradead.org> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Acked-by: Andi Kleen <ak@linux.intel.com> Acked-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Nick Piggin <npiggin@kernel.dk> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* Merge branch 'writable_limits' of git://decibel.fi.muni.cz/~xslaby/linuxLinus Torvalds2010-08-101-4/+8
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'writable_limits' of git://decibel.fi.muni.cz/~xslaby/linux: unistd: add __NR_prlimit64 syscall numbers rlimits: implement prlimit64 syscall rlimits: switch more rlimit syscalls to do_prlimit rlimits: redo do_setrlimit to more generic do_prlimit rlimits: add rlimit64 structure rlimits: do security check under task_lock rlimits: allow setrlimit to non-current tasks rlimits: split sys_setrlimit rlimits: selinux, do rlimits changes under task_lock rlimits: make sure ->rlim_max never grows in sys_setrlimit rlimits: add task_struct to update_rlimit_cpu rlimits: security, add task_struct to setrlimit Fix up various system call number conflicts. We not only added fanotify system calls in the meantime, but asm-generic/unistd.h added a wait4 along with a range of reserved per-architecture system calls.
| * rlimits: selinux, do rlimits changes under task_lockOleg Nesterov2010-07-161-2/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | When doing an exec, selinux updates rlimits in its code of current process depending on current max. Make sure max or cur doesn't change in the meantime by grabbing task_lock which do_prlimit needs for changing limits too. While at it, use rlimit helper for accessing CPU rlimit a line below. To have a volatile access too. Signed-off-by: Jiri Slaby <jslaby@suse.cz> Cc: Oleg Nesterov <oleg@redhat.com>
| * rlimits: add task_struct to update_rlimit_cpuJiri Slaby2010-07-161-1/+2
| | | | | | | | | | | | | | | | Add task_struct as a parameter to update_rlimit_cpu to be able to set rlimit_cpu of different task than current. Signed-off-by: Jiri Slaby <jirislaby@gmail.com> Acked-by: James Morris <jmorris@namei.org>
| * rlimits: security, add task_struct to setrlimitJiri Slaby2010-07-161-3/+4
| | | | | | | | | | | | | | | | | | Add task_struct to task_setrlimit of security_operations to be able to set rlimit of task other than current. Signed-off-by: Jiri Slaby <jirislaby@gmail.com> Acked-by: Eric Paris <eparis@redhat.com> Acked-by: James Morris <jmorris@namei.org>
* | SELINUX: Fix build error.Ralf Baechle2010-08-061-1/+1
| | | | | | | | | | | | | | | | | | | | Fix build error caused by a stale security/selinux/av_permissions.h in the $(src) directory which will override a more recent version in $(obj) that is it appears to strike only when building with a separate object directory. Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Acked-by: Eric Paris <eparis@redhat.com> Signed-off-by: James Morris <jmorris@namei.org>
* | selinux: convert the policy type_attr_map to flex_arrayEric Paris2010-08-023-13/+39
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
* | SELinux: Move execmod to the common permsEric Paris2010-08-021-4/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | execmod "could" show up on non regular files and non chr files. The current implementation would actually make these checks against non-existant bits since the code assumes the execmod permission is same for all file types. To make this line up for chr files we had to define execute_no_trans and entrypoint permissions. These permissions are unreachable and only existed to to make FILE__EXECMOD and CHR_FILE__EXECMOD the same. This patch drops those needless perms as well. 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>
* | selinux: place open in the common file permsEric Paris2010-08-022-28/+11
| | | | | | | | | | | | | | | | | | kernel can dynamically remap perms. Drop the open lookup table and put open in the common file perms. 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>
* | SELinux: special dontaudit for access checksEric Paris2010-08-023-8/+38
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently there are a number of applications (nautilus being the main one) which calls access() on files in order to determine how they should be displayed. It is normal and expected that nautilus will want to see if files are executable or if they are really read/write-able. access() should return the real permission. SELinux policy checks are done in access() and can result in lots of AVC denials as policy denies RWX on files which DAC allows. Currently SELinux must dontaudit actual attempts to read/write/execute a file in order to silence these messages (and not flood the logs.) But dontaudit rules like that can hide real attacks. This patch addes a new common file permission audit_access. This permission is special in that it is meaningless and should never show up in an allow rule. Instead the only place this permission has meaning is in a dontaudit rule like so: dontaudit nautilus_t sbin_t:file audit_access With such a rule if nautilus just checks access() we will still get denied and thus userspace will still get the correct answer but we will not log the denial. If nautilus attempted to actually perform one of the forbidden actions (rather than just querying access(2) about it) we would still log a denial. This type of dontaudit rule should be used sparingly, as it could be a method for an attacker to probe the system permissions without detection. 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>
* | security: make LSMs explicitly mask off permissionsEric Paris2010-08-021-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | SELinux needs to pass the MAY_ACCESS flag so it can handle auditting correctly. Presently the masking of MAY_* flags is done in the VFS. In order to allow LSMs to decide what flags they care about and what flags they don't just pass them all and the each LSM mask off what they don't need. This patch should contain no functional changes to either the VFS or any LSM. 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>
* | SELinux: break ocontext reading into a separate functionEric Paris2010-08-021-111/+133
| | | | | | | | | | | | | | | | | | Move the reading of ocontext type data out of policydb_read() in a separate function ocontext_read() 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>
* | SELinux: move genfs read to a separate functionEric Paris2010-08-021-105/+133
| | | | | | | | | | | | | | | | | | move genfs read functionality out of policydb_read() and into a new function called genfs_read() 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>
* | selinux: fix error codes in symtab_init()Dan Carpenter2010-08-021-1/+1
| | | | | | | | | | | | | | | | | | | | hashtab_create() only returns NULL on allocation failures to -ENOMEM is appropriate here. Signed-off-by: Dan Carpenter <error27@gmail.com> Acked-by: Eric Paris <eparis@redhat.com> Acked-by: Stephen D. Smalley <sds@tycho.nsa.gov> Signed-off-by: James Morris <jmorris@namei.org>
* | selinux: fix error codes in cond_read_bool()Dan Carpenter2010-08-021-5/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | The original code always returned -1 (-EPERM) on error. The new code returns either -ENOMEM, or -EINVAL or it propagates the error codes from lower level functions next_entry() or hashtab_insert(). next_entry() returns -EINVAL. hashtab_insert() returns -EINVAL, -EEXIST, or -ENOMEM. 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: fix error codes in cond_policydb_init()Dan Carpenter2010-08-021-2/+6
| | | | | | | | | | | | | | | | | | | | It's better to propagate the error code from avtab_init() instead of returning -1 (-EPERM). It turns out that avtab_init() never fails so this patch doesn't change how the code runs but it's still a clean up. 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: fix error codes in cond_read_node()Dan Carpenter2010-08-021-8/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Originally cond_read_node() returned -1 (-EPERM) on errors which was incorrect. Now it either propagates the error codes from lower level functions next_entry() or cond_read_av_list() or it returns -ENOMEM or -EINVAL. next_entry() returns -EINVAL. cond_read_av_list() returns -EINVAL or -ENOMEM. 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: fix error codes in cond_read_av_list()Dan Carpenter2010-08-021-6/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | After this patch cond_read_av_list() no longer returns -1 for any errors. It just propagates error code back from lower levels. Those can either be -EINVAL or -ENOMEM. I also modified cond_insertf() since cond_read_av_list() passes that as a function pointer to avtab_read_item(). It isn't used anywhere else. 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: propagate error codes in cond_read_list()Dan Carpenter2010-08-021-4/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | These are passed back when the security module gets loaded. The original code always returned -1 (-EPERM) on error but after this patch it can return -EINVAL, or -ENOMEM or propagate the error code from cond_read_node(). cond_read_node() still returns -1 all the time, but I fix that in a later patch. 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: cleanup return codes in avtab_read_item()Dan Carpenter2010-08-021-20/+19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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: use generic_file_llseekArnd Bergmann2010-08-021-0/+16
| | | | | | | | | | | | | | | | | | | | | | | | The default for llseek will change to no_llseek, so selinuxfs needs to add explicit .llseek assignments. Since we're dealing with regular files from a VFS perspective, use generic_file_llseek. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: Stephen Smalley <sds@tycho.nsa.gov> Cc: Eric Paris <eparis@parisplace.org> Signed-off-by: James Morris <jmorris@namei.org>
* | security: move LSM xattrnames to xattr.hMimi Zohar2010-08-021-3/+0
| | | | | | | | | | | | | | | | | | Make the security extended attributes names global. Updated to move the remaining Smack xattrs. Signed-off-by: Mimi Zohar <zohar@us.ibm.com> Acked-by: Serge Hallyn <serue@us.ibm.com> Signed-off-by: James Morris <jmorris@namei.org>
* | selinux: Use current_security() when possiblePaul Moore2010-08-021-11/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There were a number of places using the following code pattern: struct cred *cred = current_cred(); struct task_security_struct *tsec = cred->security; ... which were simplified to the following: struct task_security_struct *tsec = current_security(); Signed-off-by: Paul Moore <paul.moore@hp.com> Acked-by: Eric Paris <eparis@redhat.com> Signed-off-by: James Morris <jmorris@namei.org>
* | selinux: Convert socket related access controls to use socket labelsPaul Moore2010-08-021-74/+45
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | At present, the socket related access controls use a mix of inode and socket labels; while there should be no practical difference (they _should_ always be the same), it makes the code more confusing. This patch attempts to convert all of the socket related access control points (with the exception of some of the inode/fd based controls) to use the socket's own label. In the process, I also converted the socket_has_perm() function to take a 'sock' argument instead of a 'socket' since that was adding a bit more overhead in some cases. Signed-off-by: Paul Moore <paul.moore@hp.com> Acked-by: Eric Paris <eparis@redhat.com> Signed-off-by: James Morris <jmorris@namei.org>
* | selinux: Shuffle the sk_security_struct alloc and free routinesPaul Moore2010-08-021-28/+17
| | | | | | | | | | | | | | | | | | | | | | The sk_alloc_security() and sk_free_security() functions were only being called by the selinux_sk_alloc_security() and selinux_sk_free_security() functions so we just move the guts of the alloc/free routines to the callers and eliminate a layer of indirection. Signed-off-by: Paul Moore <paul.moore@hp.com> Acked-by: Eric Paris <eparis@redhat.com> Signed-off-by: James Morris <jmorris@namei.org>
* | selinux: Consolidate sockcreate_sid logicPaul Moore2010-08-021-20/+12
| | | | | | | | | | | | | | | | | | Consolidate the basic sockcreate_sid logic into a single helper function which allows us to do some cleanups in the related code. Signed-off-by: Paul Moore <paul.moore@hp.com> Acked-by: Eric Paris <eparis@redhat.com> Signed-off-by: James Morris <jmorris@namei.org>
* | selinux: Set the peer label correctly on connected UNIX domain socketsPaul Moore2010-08-021-16/+14
| | | | | | | | | | | | | | | | | | Correct a problem where we weren't setting the peer label correctly on the client end of a pair of connected UNIX sockets. Signed-off-by: Paul Moore <paul.moore@hp.com> Acked-by: Eric Paris <eparis@redhat.com> Signed-off-by: James Morris <jmorris@namei.org>
* | SELinux: seperate range transition rules to a seperate functionEric Paris2010-08-021-64/+75
| | | | | | | | | | | | | | | | | | Move the range transition rule to a separate function, range_read(), rather than doing it all in policydb_read() Signed-off-by: Eric Paris <eparis@redhat.com> Acked-by: Stephen Smalley <sds@tycho.nsa.gov> Signed-off-by: James Morris <jmorris@namei.org>
* | selinux: remove all rcu head initializationsPaul E. McKenney2010-08-022-3/+0
|/ | | | | | | | | | | | | Remove all rcu head inits. We don't care about the RCU head state before passing it to call_rcu() anyway. Only leave the "on_stack" variants so debugobjects can keep track of objects on stack. Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Stephen Smalley <sds@tycho.nsa.gov> Reviewed-by: James Morris <jmorris@namei.org> Cc: Eric Paris <eparis@parisplace.org> Signed-off-by: James Morris <jmorris@namei.org>
* switch selinux delayed superblock handling to iterate_supers()Al Viro2010-05-212-48/+8
| | | | | | ... kill their private list, while we are at it Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* security/selinux/ss: Use kstrdupJulia Lawall2010-05-171-2/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | Use kstrdup when the goal of an allocation is copy a string into the allocated region. The semantic patch that makes this change is as follows: (http://coccinelle.lip6.fr/) // <smpl> @@ expression from,to; expression flag,E1,E2; statement S; @@ - to = kmalloc(strlen(from) + 1,flag); + to = kstrdup(from, flag); ... when != \(from = E1 \| to = E1 \) if (to==NULL || ...) S ... when != \(from = E2 \| to = E2 \) - strcpy(to, from); // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Acked-by: Eric Paris <eparis@redhat.com> Signed-off-by: James Morris <jmorris@namei.org>
* Merge branch 'master' into nextJames Morris2010-05-066-0/+6
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| * SELinux: Reduce max avtab size to avoid page allocation failuresStephen Smalley2010-04-151-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | Reduce MAX_AVTAB_HASH_BITS so that the avtab allocation is an order 2 allocation rather than an order 4 allocation on x86_64. This addresses reports of page allocation failures: http://marc.info/?l=selinux&m=126757230625867&w=2 https://bugzilla.redhat.com/show_bug.cgi?id=570433 Reported-by: Russell Coker <russell@coker.com.au> Signed-off-by: Stephen D. Smalley <sds@tycho.nsa.gov> Acked-by: Eric Paris <eparis@redhat.com> Signed-off-by: James Morris <jmorris@namei.org>
| * include cleanup: Update gfp.h and slab.h includes to prepare for breaking ↵Tejun Heo2010-03-307-1/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
* | selinux: generalize disabling of execmem for plt-in-heap archsStephen Smalley2010-04-291-6/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | On Tue, 2010-04-27 at 11:47 -0700, David Miller wrote: > From: "Tom \"spot\" Callaway" <tcallawa@redhat.com> > Date: Tue, 27 Apr 2010 14:20:21 -0400 > > > [root@apollo ~]$ cat /proc/2174/maps > > 00010000-00014000 r-xp 00000000 fd:00 15466577 > > /sbin/mingetty > > 00022000-00024000 rwxp 00002000 fd:00 15466577 > > /sbin/mingetty > > 00024000-00046000 rwxp 00000000 00:00 0 > > [heap] > > SELINUX probably barfs on the executable heap, the PLT is in the HEAP > just like powerpc32 and that's why VM_DATA_DEFAULT_FLAGS has to set > both executable and writable. > > You also can't remove the CONFIG_PPC32 ifdefs in selinux, since > because of the VM_DATA_DEFAULT_FLAGS setting used still in that arch, > the heap will always have executable permission, just like sparc does. > You have to support those binaries forever, whether you like it or not. > > Let's just replace the CONFIG_PPC32 ifdef in SELINUX with CONFIG_PPC32 > || CONFIG_SPARC as in Tom's original patch and let's be done with > this. > > In fact I would go through all the arch/ header files and check the > VM_DATA_DEFAULT_FLAGS settings and add the necessary new ifdefs to the > SELINUX code so that other platforms don't have the pain of having to > go through this process too. To avoid maintaining per-arch ifdefs, it seems that we could just directly use (VM_DATA_DEFAULT_FLAGS & VM_EXEC) as the basis for deciding whether to enable or disable these checks. VM_DATA_DEFAULT_FLAGS isn't constant on some architectures but instead depends on current->personality, but we want this applied uniformly. So we'll just use the initial task state to determine whether or not to enable these checks. Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: James Morris <jmorris@namei.org>
* | LSM Audit: rename LSM_AUDIT_NO_AUDIT to LSM_AUDIT_DATA_NONEEric Paris2010-04-281-2/+1
| | | | | | | | | | | | | | | | | | | | Most of the LSM common audit work uses LSM_AUDIT_DATA_* for the naming. This was not so for LSM_AUDIT_NO_AUDIT which means the generic initializer cannot be used. This patch just renames the flag so the generic initializer can be used. Signed-off-by: Eric Paris <eparis@redhat.com> Signed-off-by: James Morris <jmorris@namei.org>
* | SELinux: return error codes on policy load failureEric Paris2010-04-211-15/+22
| | | | | | | | | | | | | | | | | | | | | | policy load failure always return EINVAL even if the failure was for some other reason (usually ENOMEM). This patch passes error codes back up the stack where they will make their way to userspace. This might help in debugging future problems with policy load. Signed-off-by: Eric Paris <eparis@redhat.com> Acked-by: Stephen Smalley <sds@tycho.nsa.gov> Signed-off-by: James Morris <jmorris@namei.org>
* | Security: Fix coding style in security/wzt.wzt@gmail.com2010-04-094-31/+31
| | | | | | | | | | | | | | Fix coding style in security/ Signed-off-by: Zhitong Wang <zhitong.wangzt@alibaba-inc.com> Signed-off-by: James Morris <jmorris@namei.org>
* | selinux: always call sk_security_struct sksecEric Paris2010-04-083-36/+36
| | | | | | | | | | | | | | | | trying to grep everything that messes with a sk_security_struct isn't easy since we don't always call it sksec. Just rename everything sksec. Signed-off-by: Eric Paris <eparis@redhat.com> Signed-off-by: James Morris <jmorris@namei.org>
* | Merge branch 'master' into nextJames Morris2010-03-311-3/+3
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| * Merge branch 'for-next' into for-linusJiri Kosina2010-03-081-3/+3
| |\ | | | | | | | | | | | | | | | | | | | | | | | | Conflicts: Documentation/filesystems/proc.txt arch/arm/mach-u300/include/mach/debug-macro.S drivers/net/qlge/qlge_ethtool.c drivers/net/qlge/qlge_main.c drivers/net/typhoon.c
| | * fix comment typos in avc.cJustin P. Mattock2010-02-051-3/+3
| | | | | | | | | | | | | | | Signed-off-by: Justin P. Mattock <justinmattock@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* | | SELinux: Reduce max avtab size to avoid page allocation failuresStephen Smalley2010-03-161-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Reduce MAX_AVTAB_HASH_BITS so that the avtab allocation is an order 2 allocation rather than an order 4 allocation on x86_64. This addresses reports of page allocation failures: http://marc.info/?l=selinux&m=126757230625867&w=2 https://bugzilla.redhat.com/show_bug.cgi?id=570433 Reported-by: Russell Coker <russell@coker.com.au> Signed-off-by: Stephen D. Smalley <sds@tycho.nsa.gov> Acked-by: Eric Paris <eparis@redhat.com> Signed-off-by: James Morris <jmorris@namei.org>
* | | Merge branch 'next-queue' into nextJames Morris2010-03-096-6/+3
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| * | selinux: const strings in tablesStephen Hemminger2010-03-083-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | Several places strings tables are used that should be declared const. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: James Morris <jmorris@namei.org>
| * | Selinux: Remove unused headers skbuff.h in selinux/nlmsgtab.cwzt.wzt@gmail.com2010-03-041-1/+0
| | | | | | | | | | | | | | | | | | | | | skbuff.h is already included by netlink.h, so remove it. Signed-off-by: Zhitong Wang <zhitong.wangzt@alibaba-inc.com> Signed-off-by: James Morris <jmorris@namei.org>
| * | Selinux: Remove unused headers slab.h in selinux/ss/symtab.cwzt.wzt@gmail.com2010-03-031-1/+0
| | | | | | | | | | | | | | | | | | | | | slab.h is unused in symtab.c, so remove it. Signed-off-by: Zhitong Wang <zhitong.wangzt@alibaba-inc.com> Signed-off-by: James Morris <jmorris@namei.org>
| * | Selinux: Remove unused headers list.h in selinux/netlink.cwzt.wzt@gmail.com2010-03-031-1/+0
| | | | | | | | | | | | | | | | | | | | | list.h is unused in netlink.c, so remove it. Signed-off-by: Zhitong Wang <zhitong.wangzt@alibaba-inc.com> Signed-off-by: James Morris <jmorris@namei.org>
* | | Merge branch 'next' into for-linusJames Morris2010-03-0111-265/+302
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