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2008-02-14Introduce path_put()Jan Blunck1-2/+2
* Add path_put() functions for releasing a reference to the dentry and vfsmount of a struct path in the right order * Switch from path_release(nd) to path_put(&nd->path) * Rename dput_path() to path_put_conditional() [akpm@linux-foundation.org: fix cifs] Signed-off-by: Jan Blunck <jblunck@suse.de> Signed-off-by: Andreas Gruenbacher <agruen@suse.de> Acked-by: Christoph Hellwig <hch@lst.de> Cc: <linux-fsdevel@vger.kernel.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Steven French <sfrench@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-14Embed a struct path into struct nameidata instead of nd->{dentry,mnt}Jan Blunck1-5/+6
This is the central patch of a cleanup series. In most cases there is no good reason why someone would want to use a dentry for itself. This series reflects that fact and embeds a struct path into nameidata. Together with the other patches of this series - it enforced the correct order of getting/releasing the reference count on <dentry,vfsmount> pairs - it prepares the VFS for stacking support since it is essential to have a struct path in every place where the stack can be traversed - it reduces the overall code size: without patch series: text data bss dec hex filename 5321639 858418 715768 6895825 6938d1 vmlinux with patch series: text data bss dec hex filename 5320026 858418 715768 6894212 693284 vmlinux This patch: Switch from nd->{dentry,mnt} to nd->path.{dentry,mnt} everywhere. [akpm@linux-foundation.org: coding-style fixes] [akpm@linux-foundation.org: fix cifs] [akpm@linux-foundation.org: fix smack] Signed-off-by: Jan Blunck <jblunck@suse.de> Signed-off-by: Andreas Gruenbacher <agruen@suse.de> Acked-by: Christoph Hellwig <hch@lst.de> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Casey Schaufler <casey@schaufler-ca.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-01[AUDIT] make audit=0 really stop audit messagesEric Paris1-21/+33
Some audit messages (namely configuration changes) are still emitted even if the audit subsystem has been explicitly disabled. This patch turns those messages off as well. Signed-off-by: Eric Paris <eparis@redhat.com>
2007-10-21[PATCH] audit: watching subtreesAl Viro1-7/+57
New kind of audit rule predicates: "object is visible in given subtree". The part that can be sanely implemented, that is. Limitations: * if you have hardlink from outside of tree, you'd better watch it too (or just watch the object itself, obviously) * if you mount something under a watched tree, tell audit that new chunk should be added to watched subtrees * if you umount something in a watched tree and it's still mounted elsewhere, you will get matches on events happening there. New command tells audit to recalculate the trees, trimming such sources of false positives. Note that it's _not_ about path - if something mounted in several places (multiple mount, bindings, different namespaces, etc.), the match does _not_ depend on which one we are using for access. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2007-10-18whitespace fixes: audit filteringDaniel Walker1-2/+2
Signed-off-by: Daniel Walker <dwalker@mvista.com> Cc: David Woodhouse <dwmw2@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-22[PATCH] allow audit filtering on bit & operationsEric Paris1-0/+11
Right now the audit filter can match on = != > < >= blah blah blah. This allow the filter to also look at bitwise AND operations, & Signed-off-by: Eric Paris <eparis@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2007-07-22[PATCH] audit: fix broken class-based syscall auditKlaus Weidner1-1/+1
The sanity check in audit_match_class() is wrong. We are able to audit 2048 syscalls but in audit_match_class() we were accidentally using sizeof(_u32) instead of number of bits in _u32 when deciding how many syscalls were valid. On ia64 in particular we were hitting syscall numbers over the (wrong) limit of 256. Fixing the audit_match_class check takes care of the problem. Signed-off-by: Klaus Weidner <klaus@atsec.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2007-07-17kernel/auditfilter: kill bogus uninit'd-var compiler warningJeff Garzik1-8/+4
Kill this warning... kernel/auditfilter.c: In function ‘audit_receive_filter’: kernel/auditfilter.c:1213: warning: ‘ndw’ may be used uninitialized in this function kernel/auditfilter.c:1213: warning: ‘ndp’ may be used uninitialized in this function ...with a simplification of the code. audit_put_nd() can accept NULL arguments, just like kfree(). It is cleaner to init two existing vars to NULL, remove the redundant test variable 'putnd_needed' branches, and call audit_put_nd() directly. As a desired side effect, the warning goes away. Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-06-24audit: fix oops removing watch if audit disabledTony Jones1-1/+1
Removing a watched file will oops if audit is disabled (auditctl -e 0). To reproduce: - auditctl -e 1 - touch /tmp/foo - auditctl -w /tmp/foo - auditctl -e 0 - rm /tmp/foo (or mv) Signed-off-by: Tony Jones <tonyj@suse.de> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-15audit_match_signal() and friends are used only if CONFIG_AUDITSYSCALL is setAl Viro1-0/+2
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-11[PATCH] audit signal recipientsAmy Griffis1-1/+47
When auditing syscalls that send signals, log the pid and security context for each target process. Optimize the data collection by adding a counter for signal-related rules, and avoiding allocating an aux struct unless we have more than one target process. For process groups, collect pid/context data in blocks of 16. Move the audit_signal_info() hook up in check_kill_permission() so we audit attempts where permission is denied. Signed-off-by: Amy Griffis <amy.griffis@hp.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2007-02-17[PATCH] minor update to rule add/delete messages (ver 2)Steve Grubb1-4/+5
I was looking at parsing some of these messages and found that I wanted what it was doing next to an op= for the parser to key on. Also missing was the list number and results. Signed-off-by: Steve Grubb <sgrubb@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2007-02-11[PATCH] audit: fix audit_filter_user_rules() initialization bugIngo Molnar1-1/+1
gcc emits this warning: kernel/auditfilter.c: In function 'audit_filter_user': kernel/auditfilter.c:1611: warning: 'state' is used uninitialized in this function I tend to agree with gcc - there are a couple of plausible exit paths from audit_filter_user_rules() where it does not set 'state', keeping the variable uninitialized. For example if a filter rule has an AUDIT_POSSIBLE action. Initialize to 'wont audit'. Fix whitespace damage too. Signed-off-by: Ingo Molnar <mingo@elte.hu> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2006-12-22[PATCH] audit: fix kstrdup() error checkAkinobu Mita1-2/+2
kstrdup() returns NULL on error. Cc: David Woodhouse <dwmw2@infradead.org> Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07[PATCH] kernel core: replace kmalloc+memset with kzallocBurman Yan1-2/+1
Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-10-04[PATCH] arch filter lists with < or > should not be acceptedEric Paris1-1/+8
Currently the kernel audit system represents arch's as numbers and will gladly accept comparisons between archs using >, <, >=, <= when the only thing that makes sense is = or !=. I'm told that the next revision of auditctl will do this checking but this will provide enforcement in the kernel even for old userspace. A simple command to show the issue would be to run auditctl -d entry,always -F arch>i686 -S chmod with this patch the kernel will reject this with -EINVAL Please comment/ack/nak as soon as possible. -Eric kernel/auditfilter.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2006-09-26[PATCH] selinux: rename selinux_ctxid_to_stringStephen Smalley1-1/+1
Rename selinux_ctxid_to_string to selinux_sid_to_string to be consistent with other interfaces. 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>
2006-09-11[PATCH] audit: AUDIT_PERM supportAl Viro1-0/+17
add support for AUDIT_PERM predicate Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2006-09-11[PATCH] update audit rule change messagesAmy Griffis1-5/+14
Make the audit message for implicit rule removal more informative. Make the rule update message consistent with other messages. Signed-off-by: Amy Griffis <amy.griffis@hp.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2006-09-11[PATCH] fix ppid bug in 2.6.18 kernelSteve Grubb1-0/+1
Hello, During some troubleshooting, I found that ppid was accidentally omitted from the legacy rule section. This resulted in EINVAL for any rule with ppid sent with AUDIT_ADD. Signed-off-by: Steve Grubb <sgrubb@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2006-08-03[PATCH] introduce audit rules counterAl Viro1-0/+24
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2006-08-03[PATCH] fix audit oops with invalid operatorAmy Griffis1-0/+2
Michael C Thompson wrote: [Tue Aug 01 2006, 02:36:36PM EDT] > The trigger for this oops is: > # auditctl -a exit,always -S pread64 -F 'inode<1' Setting the err value will fix it. Signed-off-by: Amy Griffis <amy.griffis@hp.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2006-07-01[PATCH] audit syscall classesAl Viro1-0/+39
Allow to tie upper bits of syscall bitmap in audit rules to kernel-defined sets of syscalls. Infrastructure, a couple of classes (with 32bit counterparts for biarch targets) and actual tie-in on i386, amd64 and ia64. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2006-07-01[PATCH] audit: support for object context filtersDarrel Goeddel1-0/+25
This patch introduces object audit filters based on the elements of the SELinux context. Signed-off-by: Darrel Goeddel <dgoeddel@trustedcs.com> Acked-by: Stephen Smalley <sds@tycho.nsa.gov> kernel/auditfilter.c | 25 +++++++++++++++++++++++++ kernel/auditsc.c | 40 ++++++++++++++++++++++++++++++++++++++++ security/selinux/ss/services.c | 18 +++++++++++++++++- 3 files changed, 82 insertions(+), 1 deletion(-) Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2006-07-01[PATCH] audit: rename AUDIT_SE_* constantsDarrel Goeddel1-25/+25
This patch renames some audit constant definitions and adds additional definitions used by the following patch. The renaming avoids ambiguity with respect to the new definitions. Signed-off-by: Darrel Goeddel <dgoeddel@trustedcs.com> include/linux/audit.h | 15 ++++++++---- kernel/auditfilter.c | 50 ++++++++++++++++++++--------------------- kernel/auditsc.c | 10 ++++---- security/selinux/ss/services.c | 32 +++++++++++++------------- 4 files changed, 56 insertions(+), 51 deletions(-) Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2006-07-01[PATCH] add rule filterkeyAmy Griffis1-36/+59
Add support for a rule key, which can be used to tie audit records to audit rules. This is useful when a watched file is accessed through a link or symlink, as well as for general audit log analysis. Because this patch uses a string key instead of an integer key, there is a bit of extra overhead to do the kstrdup() when a rule fires. However, we're also allocating memory for the audit record buffer, so it's probably not that significant. I went ahead with a string key because it seems more user-friendly. Note that the user must ensure that filterkeys are unique. The kernel only checks for duplicate rules. Signed-off-by: Amy Griffis <amy.griffis@hpd.com>
2006-06-20[PATCH] log more info for directory entry change eventsAmy Griffis1-2/+6
When an audit event involves changes to a directory entry, include a PATH record for the directory itself. A few other notable changes: - fixed audit_inode_child() hooks in fsnotify_move() - removed unused flags arg from audit_inode() - added audit log routines for logging a portion of a string Here's some sample output. before patch: type=SYSCALL msg=audit(1149821605.320:26): arch=40000003 syscall=39 success=yes exit=0 a0=bf8d3c7c a1=1ff a2=804e1b8 a3=bf8d3c7c items=1 ppid=739 pid=800 auid=0 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=ttyS0 comm="mkdir" exe="/bin/mkdir" subj=root:system_r:unconfined_t:s0-s0:c0.c255 type=CWD msg=audit(1149821605.320:26): cwd="/root" type=PATH msg=audit(1149821605.320:26): item=0 name="foo" parent=164068 inode=164010 dev=03:00 mode=040755 ouid=0 ogid=0 rdev=00:00 obj=root:object_r:user_home_t:s0 after patch: type=SYSCALL msg=audit(1149822032.332:24): arch=40000003 syscall=39 success=yes exit=0 a0=bfdd9c7c a1=1ff a2=804e1b8 a3=bfdd9c7c items=2 ppid=714 pid=777 auid=0 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=ttyS0 comm="mkdir" exe="/bin/mkdir" subj=root:system_r:unconfined_t:s0-s0:c0.c255 type=CWD msg=audit(1149822032.332:24): cwd="/root" type=PATH msg=audit(1149822032.332:24): item=0 name="/root" inode=164068 dev=03:00 mode=040750 ouid=0 ogid=0 rdev=00:00 obj=root:object_r:user_home_dir_t:s0 type=PATH msg=audit(1149822032.332:24): item=1 name="foo" inode=164010 dev=03:00 mode=040755 ouid=0 ogid=0 rdev=00:00 obj=root:object_r:user_home_t:s0 Signed-off-by: Amy Griffis <amy.griffis@hp.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2006-06-20[PATCH] fix AUDIT_FILTER_PREPEND handlingAmy Griffis1-0/+1
Clear AUDIT_FILTER_PREPEND flag after adding rule to list. This fixes three problems when a rule is added with the -A syntax: - auditctl displays filter list as "(null)" - the rule cannot be removed using -d - a duplicate rule can be added with -a Signed-off-by: Amy Griffis <amy.griffis@hp.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2006-06-20[PATCH] validate rule fields' typesAl Viro1-9/+48
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2006-06-20[PATCH] audit: path-based rulesAmy Griffis1-40/+745
In this implementation, audit registers inotify watches on the parent directories of paths specified in audit rules. When audit's inotify event handler is called, it updates any affected rules based on the filesystem event. If the parent directory is renamed, removed, or its filesystem is unmounted, audit removes all rules referencing that inotify watch. To keep things simple, this implementation limits location-based auditing to the directory entries in an existing directory. Given a path-based rule for /foo/bar/passwd, the following table applies: passwd modified -- audit event logged passwd replaced -- audit event logged, rules list updated bar renamed -- rule removed foo renamed -- untracked, meaning that the rule now applies to the new location Audit users typically want to have many rules referencing filesystem objects, which can significantly impact filtering performance. This patch also adds an inode-number-based rule hash to mitigate this situation. The patch is relative to the audit git tree: http://kernel.org/git/?p=linux/kernel/git/viro/audit-current.git;a=summary and uses the inotify kernel API: http://lkml.org/lkml/2006/6/1/145 Signed-off-by: Amy Griffis <amy.griffis@hp.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2006-06-20[PATCH] deprecate AUDIT_POSSBILEAl Viro1-3/+5
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2006-06-20[PATCH] fix audit_krule_to_{rule,data} return valuesAmy Griffis1-2/+2
Don't return -ENOMEM when callers of these functions are checking for a NULL return. Bug noticed by Serge Hallyn. Signed-off-by: Amy Griffis <amy.griffis@hp.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2006-06-20[PATCH] fix deadlocks in AUDIT_LIST/AUDIT_LIST_RULESAl Viro1-35/+25
We should not send a pile of replies while holding audit_netlink_mutex since we hold the same mutex when we receive commands. As the result, we can get blocked while sending and sit there holding the mutex while auditctl is unable to send the next command and get around to receiving what we'd sent. Solution: create skb and put them into a queue instead of sending; once we are done, send what we've got on the list. The former can be done synchronously while we are handling AUDIT_LIST or AUDIT_LIST_RULES; we are holding audit_netlink_mutex at that point. The latter is done asynchronously and without messing with audit_netlink_mutex. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2006-05-01[PATCH] More user space subject labelsSteve Grubb1-7/+37
Hi, The patch below builds upon the patch sent earlier and adds subject label to all audit events generated via the netlink interface. It also cleans up a few other minor things. Signed-off-by: Steve Grubb <sgrubb@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2006-05-01[PATCH] support for context based audit filtering, part 2Darrel Goeddel1-24/+221
This patch provides the ability to filter audit messages based on the elements of the process' SELinux context (user, role, type, mls sensitivity, and mls clearance). It uses the new interfaces from selinux to opaquely store information related to the selinux context and to filter based on that information. It also uses the callback mechanism provided by selinux to refresh the information when a new policy is loaded. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2006-03-20[PATCH] sem2mutex: audit_netlink_semIngo Molnar1-8/+8
Semaphore to mutex conversion. The conversion was generated via scripts, and the result was validated automatically via a script as well. Signed-off-by: Ingo Molnar <mingo@elte.hu> Cc: David Woodhouse <dwmw2@infradead.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2006-03-20[PATCH] Fix audit operatorsDustin Kirkland1-6/+12
Darrel Goeddel initiated a discussion on IRC regarding the possibility of audit_comparator() returning -EINVAL signaling an invalid operator. It is possible when creating the rule to assure that the operator is one of the 6 sane values. Here's a snip from include/linux/audit.h Note that 0 (nonsense) and 7 (all operators) are not valid values for an operator. ... /* These are the supported operators. * 4 2 1 * = > < * ------- * 0 0 0 0 nonsense * 0 0 1 1 < * 0 1 0 2 > * 0 1 1 3 != * 1 0 0 4 = * 1 0 1 5 <= * 1 1 0 6 >= * 1 1 1 7 all operators */ ... Furthermore, prior to adding these extended operators, flagging the AUDIT_NEGATE bit implied !=, and otherwise == was assumed. The following code forces the operator to be != if the AUDIT_NEGATE bit was flipped on. And if no operator was specified, == is assumed. The only invalid condition is if the AUDIT_NEGATE bit is off and all of the AUDIT_EQUAL, AUDIT_LESS_THAN, and AUDIT_GREATER_THAN bits are on--clearly a nonsensical operator. Now that this is handled at rule insertion time, the default -EINVAL return of audit_comparator() is eliminated such that the function can only return 1 or 0. If this is acceptable, let's get this applied to the current tree. :-Dustin -- Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> (cherry picked from 9bf0a8e137040f87d1b563336d4194e38fb2ba1a commit)
2006-03-20[PATCH] add/remove rule updateSteve Grubb1-7/+9
Hi, The following patch adds a little more information to the add/remove rule message emitted by the kernel. Signed-off-by: Steve Grubb <sgrubb@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2006-03-20[PATCH] audit string fields interface + consumerAmy Griffis1-110/+357
Updated patch to dynamically allocate audit rule fields in kernel's internal representation. Added unlikely() calls for testing memory allocation result. Amy Griffis wrote: [Wed Jan 11 2006, 02:02:31PM EST] > Modify audit's kernel-userspace interface to allow the specification > of string fields in audit rules. > > Signed-off-by: Amy Griffis <amy.griffis@hp.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> (cherry picked from 5ffc4a863f92351b720fe3e9c5cd647accff9e03 commit)
2006-03-20[PATCH] Minor cosmetic cleanups to the code moved into auditfilter.cDavid Woodhouse1-7/+4
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-03-20[PATCH] Fix audit record filtering with !CONFIG_AUDITSYSCALLDavid Woodhouse1-0/+378
This fixes the per-user and per-message-type filtering when syscall auditing isn't enabled. [AV: folded followup fix from the same author] Signed-off-by: David Woodhouse <dwmw2@infradead.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

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