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2008-10-29net: replace %p6 with %pI6Harvey Harrison
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-28net, misc: replace uses of NIP6_FMT with %p6Harvey Harrison
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-10netlabel: Add configuration support for local labelingPaul Moore
Add the necessary NetLabel support for the new CIPSO mapping, CIPSO_V4_MAP_LOCAL, which allows full LSM label/context support. Signed-off-by: Paul Moore <paul.moore@hp.com> Reviewed-by: James Morris <jmorris@namei.org>
2008-10-10cipso: Add support for native local labeling and fixup mapping namesPaul Moore
This patch accomplishes three minor tasks: add a new tag type for local labeling, rename the CIPSO_V4_MAP_STD define to CIPSO_V4_MAP_TRANS and replace some of the CIPSO "magic numbers" with constants from the header file. The first change allows CIPSO to support full LSM labels/contexts, not just MLS attributes. The second change brings the mapping names inline with what userspace is using, compatibility is preserved since we don't actually change the value. The last change is to aid readability and help prevent mistakes. Signed-off-by: Paul Moore <paul.moore@hp.com>
2008-10-10selinux: Set socket NetLabel based on connection endpointPaul Moore
Previous work enabled the use of address based NetLabel selectors, which while highly useful, brought the potential for additional per-packet overhead when used. This patch attempts to solve that by applying NetLabel socket labels when sockets are connect()'d. This should alleviate the per-packet NetLabel labeling for all connected sockets (yes, it even works for connected DGRAM sockets). Signed-off-by: Paul Moore <paul.moore@hp.com> Reviewed-by: James Morris <jmorris@namei.org>
2008-10-10netlabel: Add functionality to set the security attributes of a packetPaul Moore
This patch builds upon the new NetLabel address selector functionality by providing the NetLabel KAPI and CIPSO engine support needed to enable the new packet-based labeling. The only new addition to the NetLabel KAPI at this point is shown below: * int netlbl_skbuff_setattr(skb, family, secattr) ... and is designed to be called from a Netfilter hook after the packet's IP header has been populated such as in the FORWARD or LOCAL_OUT hooks. This patch also provides the necessary SELinux hooks to support this new functionality. Smack support is not currently included due to uncertainty regarding the permissions needed to expand the Smack network access controls. Signed-off-by: Paul Moore <paul.moore@hp.com> Reviewed-by: James Morris <jmorris@namei.org>
2008-10-10netlabel: Add network address selectors to the NetLabel/LSM domain mappingPaul Moore
This patch extends the NetLabel traffic labeling capabilities to individual packets based not only on the LSM domain but the by the destination address as well. The changes here only affect the core NetLabel infrastructre, changes to the NetLabel KAPI and individial protocol engines are also required but are split out into a different patch to ease review. Signed-off-by: Paul Moore <paul.moore@hp.com> Reviewed-by: James Morris <jmorris@namei.org>
2008-10-10netlabel: Add a generic way to create ordered linked lists of network addrsPaul Moore
Create an ordered IP address linked list mechanism similar to the core kernel's linked list construct. The idea behind this list functionality is to create an extensibile linked list ordered by IP address mask to ease the matching of network addresses. The linked list is ordered with larger address masks at the front of the list and shorter address masks at the end to facilitate overriding network entries with individual host or subnet entries. Signed-off-by: Paul Moore <paul.moore@hp.com> Reviewed-by: James Morris <jmorris@namei.org>
2008-10-10netlabel: Replace protocol/NetLabel linking with refrerence countsPaul Moore
NetLabel has always had a list of backpointers in the CIPSO DOI definition structure which pointed to the NetLabel LSM domain mapping structures which referenced the CIPSO DOI struct. The rationale for this was that when an administrator removed a CIPSO DOI from the system all of the associated NetLabel LSM domain mappings should be removed as well; a list of backpointers made this a simple operation. Unfortunately, while the backpointers did make the removal easier they were a bit of a mess from an implementation point of view which was making further development difficult. Since the removal of a CIPSO DOI is a realtively rare event it seems to make sense to remove this backpointer list as the optimization was hurting us more then it was helping. However, we still need to be able to track when a CIPSO DOI definition is being used so replace the backpointer list with a reference count. In order to preserve the current functionality of removing the associated LSM domain mappings when a CIPSO DOI is removed we walk the LSM domain mapping table, removing the relevant entries. Signed-off-by: Paul Moore <paul.moore@hp.com> Reviewed-by: James Morris <jmorris@namei.org>
2008-10-10selinux: Fix missing calls to netlbl_skbuff_err()Paul Moore
At some point I think I messed up and dropped the calls to netlbl_skbuff_err() which are necessary for CIPSO to send error notifications to remote systems. This patch re-introduces the error handling calls into the SELinux code. Signed-off-by: Paul Moore <paul.moore@hp.com> Acked-by: James Morris <jmorris@namei.org>
2008-10-10netlabel: Remove unneeded in-kernel API functionsPaul Moore
After some discussions with the Smack folks, well just Casey, I now have a better idea of what Smack wants out of NetLabel in the future so I think it is now safe to do some API "pruning". If another LSM comes along that needs this functionality we can always add it back in, but I don't see any LSMs on the horizon which might make use of these functions. Thanks to Rami Rosen who suggested removing netlbl_cfg_cipsov4_del() back in February 2008. Signed-off-by: Paul Moore <paul.moore@hp.com> Reviewed-by: James Morris <jmorris@namei.org>
2008-10-10netlabel: Fix some sparse warningsPaul Moore
Fix a few sparse warnings. One dealt with a RCU lock being held on error, another dealt with an improper type caused by a signed/unsigned mixup while the rest appeared to be caused by using rcu_dereference() in a list_for_each_entry_rcu() call. The latter probably isn't a big deal, but I derive a certain pleasure from knowing that the net/netlabel is nice and clean. Thanks to James Morris for pointing out the issues and demonstrating how to run sparse. Signed-off-by: Paul Moore <paul.moore@hp.com>
2008-07-19netns: Use net_eq() to compare net-namespaces for optimization.YOSHIFUJI Hideaki
Without CONFIG_NET_NS, namespace is always &init_net. Compiler will be able to omit namespace comparisons with this patch. Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-07-18Merge branch 'master' of ↵David S. Miller
master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6 Conflicts: Documentation/powerpc/booting-without-of.txt drivers/atm/Makefile drivers/net/fs_enet/fs_enet-main.c drivers/pci/pci-acpi.c net/8021q/vlan.c net/iucv/iucv.c
2008-07-15Merge branch 'core/rcu' into core/rcu-for-linusIngo Molnar
2008-07-14netlabel: return msg overflow error from netlbl_cipsov4_list fasterDenis V. Lunev
Currently, we are trying to place the information from the kernel to 1, 2, 3 and 4 pages sequentially. These pages are allocated via slab. Though, from the slab point of view steps 3 and 4 are equivalent on most architectures. So, lets skip 3 pages attempt. By the way, should we switch from .doit to .dumpit interface here? The amount of data seems quite big for me. Signed-off-by: Denis V. Lunev <den@openvz.org> Acked-by: Paul Moore <paul.moore@hp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-07-11Merge branch 'linus' into core/rcuIngo Molnar
Conflicts: include/linux/rculist.h kernel/rcupreempt.c Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-10netlabel: netlink_unicast calls kfree_skb on error path by itselfDenis V. Lunev
So, no need to kfree_skb here on the error path. In this case we can simply return. Signed-off-by: Denis V. Lunev <den@openvz.org> Acked-by: Paul Moore <paul.moore@hp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-06-27netlabel: Fix a problem when dumping the default IPv6 static labelsPaul Moore
There is a missing "!" in a conditional statement which is causing entries to be skipped when dumping the default IPv6 static label entries. This can be demonstrated by running the following: # netlabelctl unlbl add default address:::1 \ label:system_u:object_r:unlabeled_t:s0 # netlabelctl -p unlbl list ... you will notice that the entry for the IPv6 localhost address is not displayed but does exist (works correctly, causes collisions when attempting to add duplicate entries, etc.). Signed-off-by: Paul Moore <paul.moore@hp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-05-19rcu: split list.h and move rcu-protected lists into rculist.hFranck Bui-Huu
Move rcu-protected lists from list.h into a new header file rculist.h. This is done because list are a very used primitive structure all over the kernel and it's currently impossible to include other header files in this list.h without creating some circular dependencies. For example, list.h implements rcu-protected list and uses rcu_dereference() without including rcupdate.h. It actually compiles because users of rcu_dereference() are macros. Others RCU functions could be used too but aren't probably because of this. Therefore this patch creates rculist.h which includes rcupdates without to many changes/troubles. Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com> Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Acked-by: Josh Triplett <josh@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-28Audit: collect sessionid in netlink messagesEric Paris
Previously I added sessionid output to all audit messages where it was available but we still didn't know the sessionid of the sender of netlink messages. This patch adds that information to netlink messages so we can audit who sent netlink messages. Signed-off-by: Eric Paris <eparis@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2008-04-17[NETLABEL]: Fix NULL deref in netlbl_unlabel_staticlist_gen() if ifindex not ↵Jesper Juhl
found dev_get_by_index() may return NULL if nothing is found. In net/netlabel/netlabel_unlabeled.c::netlbl_unlabel_staticlist_gen() the function is called, but the return value is never checked. If it returns NULL then we'll deref a NULL pointer on the very next line. I checked the callers, and I don't think this can actually happen today, but code changes over time and in the future it might happen and it does no harm to be defensive and check for the failure, so that if/when it happens we'll fail gracefully instead of crashing. Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com> Acked-by: Paul Moore <paul.moore@hp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-03-26[NET] NETNS: Omit net_device->nd_net without CONFIG_NET_NS.YOSHIFUJI Hideaki
Introduce per-net_device inlines: dev_net(), dev_net_set(). Without CONFIG_NET_NS, no namespace other than &init_net exists. Let's explicitly define them to help compiler optimizations. Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
2008-02-17[NETLABEL]: Move some initialization code into __init section.Pavel Emelyanov
Everything that is called from netlbl_init() can be marked with __init. This moves 620 bytes from .text section to .text.init one. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Acked-by: Paul Moore <paul.moore@hp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-02-17[NETLABEL]: Shrink the genl-ops registration code.Pavel Emelyanov
Turning them to array and registration in a loop saves 80 lines of code and ~300 bytes from text section. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Acked-by: Paul Moore <paul.moore@hp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-02-12[NETLABLE]: Hide netlbl_unlabel_audit_addr6 under ifdef CONFIG_IPV6.Pavel Emelyanov
This one is called from under this config only, so move it in the same place. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-02-12[NETLABEL]: Don't produce unused variables when IPv6 is off.Pavel Emelyanov
Some code declares variables on the stack, but uses them under #ifdef CONFIG_IPV6, so thay become unused when ipv6 is off. Fortunately, they are used in a switch's case branches, so the fix is rather simple. Is it OK from coding style POV to add braces inside "cases", or should I better avoid such style and rework the patch? Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-02-12[NETLABEL]: Compilation for CONFIG_AUDIT=n case.Pavel Emelyanov
The audit_log_start() will expand into an empty do { } while (0) construction and the audit_ctx becomes unused. The solution: push current->audit_context into audit_log_start() directly, since it is not required in any other place in the calling function. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-02-12[NETLABEL]: Fix lookup logic of netlbl_domhsh_search_def.Pavel Emelyanov
Currently, if the call to netlbl_domhsh_search succeeds the return result will still be NULL. Fix that, by returning the found entry (if any). Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Acked-by: Paul Moore <paul.moore@hp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-02-05NetLabel: introduce a new kernel configuration API for NetLabelPaul Moore
Add a new set of configuration functions to the NetLabel/LSM API so that LSMs can perform their own configuration of the NetLabel subsystem without relying on assistance from userspace. Signed-off-by: Paul Moore <paul.moore@hp.com> Signed-off-by: Casey Schaufler <casey@schaufler-ca.com> Reviewed-by: James Morris <jmorris@namei.org> Cc: Chris Wright <chrisw@sous-sol.org> Cc: Stephen Smalley <sds@tycho.nsa.gov> 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>
2008-01-30NetLabel: Add auditing to the static labeling mechanismPaul Moore
This patch adds auditing support to the NetLabel static labeling mechanism. Signed-off-by: Paul Moore <paul.moore@hp.com> Signed-off-by: James Morris <jmorris@namei.org>
2008-01-30NetLabel: Introduce static network labels for unlabeled connectionsPaul Moore
Most trusted OSs, with the exception of Linux, have the ability to specify static security labels for unlabeled networks. This patch adds this ability to the NetLabel packet labeling framework. If the NetLabel subsystem is called to determine the security attributes of an incoming packet it first checks to see if any recognized NetLabel packet labeling protocols are in-use on the packet. If none can be found then the unlabled connection table is queried and based on the packets incoming interface and address it is matched with a security label as configured by the administrator using the netlabel_tools package. The matching security label is returned to the caller just as if the packet was explicitly labeled using a labeling protocol. Signed-off-by: Paul Moore <paul.moore@hp.com> Signed-off-by: James Morris <jmorris@namei.org>
2008-01-30NetLabel: Add IP address family information to the netlbl_skbuff_getattr() ↵Paul Moore
function In order to do any sort of IP header inspection of incoming packets we need to know which address family, AF_INET/AF_INET6/etc., it belongs to and since the sk_buff structure does not store this information we need to pass along the address family separate from the packet itself. Signed-off-by: Paul Moore <paul.moore@hp.com> Signed-off-by: James Morris <jmorris@namei.org>
2008-01-30NetLabel: Add secid token support to the NetLabel secattr structPaul Moore
This patch adds support to the NetLabel LSM secattr struct for a secid token and a type field, paving the way for full LSM/SELinux context support and "static" or "fallback" labels. In addition, this patch adds a fair amount of documentation to the core NetLabel structures used as part of the NetLabel kernel API. Signed-off-by: Paul Moore <paul.moore@hp.com> Signed-off-by: James Morris <jmorris@namei.org>
2008-01-30NetLabel: Consolidate the LSM domain mapping/hashing locksPaul Moore
Currently we use two separate spinlocks to protect both the hash/mapping table and the default entry. This could be considered a bit foolish because it adds complexity without offering any real performance advantage. This patch removes the dedicated default spinlock and protects the default entry with the hash/mapping table spinlock. Signed-off-by: Paul Moore <paul.moore@hp.com> Signed-off-by: James Morris <jmorris@namei.org>
2008-01-30NetLabel: Cleanup the LSM domain hash functionsPaul Moore
The NetLabel/LSM domain hash table search function used an argument to specify if the default entry should be returned if an exact match couldn't be found in the hash table. This is a bit against the kernel's style so make two separate functions to represent the separate behaviors. Signed-off-by: Paul Moore <paul.moore@hp.com> Signed-off-by: James Morris <jmorris@namei.org>
2008-01-30NetLabel: Remove unneeded RCU read locksPaul Moore
This patch removes some unneeded RCU read locks as we can treat the reads as "safe" even without RCU. It also converts the NetLabel configuration refcount from a spinlock protected u32 into atomic_t to be more consistent with the rest of the kernel. Signed-off-by: Paul Moore <paul.moore@hp.com> Signed-off-by: James Morris <jmorris@namei.org>
2007-12-20[NETLABEL]: Spelling fixesJoe Perches
Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-26[NetLabel]: correct usage of RCU lockingPaul Moore
This fixes some awkward, and perhaps even problematic, RCU lock usage in the NetLabel code as well as some other related trivial cleanups found when looking through the RCU locking. Most of the changes involve removing the redundant RCU read locks wrapping spinlocks in the case of a RCU writer. Signed-off-by: Paul Moore <paul.moore@hp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-10[NETLINK]: Introduce nested and byteorder flag to netlink attributeThomas Graf
This change allows the generic attribute interface to be used within the netfilter subsystem where this flag was initially introduced. The byte-order flag is yet unused, it's intended use is to allow automatic byte order convertions for all atomic types. Signed-off-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-08-07[NetLabel]: add missing rcu_dereference() calls in the LSM domain mapping ↵Paul Moore
hash table The LSM domain mapping head table pointer was not being referenced via the RCU safe dereferencing function, rcu_dereference(). This patch adds those missing calls to the NetLabel code. This has been tested using recent linux-2.6 git kernels with no visible regressions. Signed-off-by: Paul Moore <paul.moore@hp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-08-02Net/Security: fix memory leaks from security_secid_to_secctx()Paul Moore
The security_secid_to_secctx() function returns memory that must be freed by a call to security_release_secctx() which was not always happening. This patch fixes two of these problems (all that I could find in the kernel source at present). Signed-off-by: Paul Moore <paul.moore@hp.com> Acked-by: Stephen Smalley <sds@tycho.nsa.gov> Signed-off-by: James Morris <jmorris@namei.org>
2007-07-19SELinux: enable dynamic activation/deactivation of NetLabel/SELinux enforcementPaul Moore
Create a new NetLabel KAPI interface, netlbl_enabled(), which reports on the current runtime status of NetLabel based on the existing configuration. LSMs that make use of NetLabel, i.e. SELinux, can use this new function to determine if they should perform NetLabel access checks. This patch changes the NetLabel/SELinux glue code such that SELinux only enforces NetLabel related access checks when netlbl_enabled() returns true. At present NetLabel is considered to be enabled when there is at least one labeled protocol configuration present. The result is that by default NetLabel is considered to be disabled, however, as soon as an administrator configured a CIPSO DOI definition NetLabel is enabled and SELinux starts enforcing NetLabel related access controls - including unlabeled packet controls. This patch also tries to consolidate the multiple "#ifdef CONFIG_NETLABEL" blocks into a single block to ease future review as recommended by Linus. Signed-off-by: Paul Moore <paul.moore@hp.com> Signed-off-by: James Morris <jmorris@namei.org>
2007-07-16Audit: add TTY input auditingMiloslav Trmac
Add TTY input auditing, used to audit system administrator's actions. This is required by various security standards such as DCID 6/3 and PCI to provide non-repudiation of administrator's actions and to allow a review of past actions if the administrator seems to overstep their duties or if the system becomes misconfigured for unknown reasons. These requirements do not make it necessary to audit TTY output as well. Compared to an user-space keylogger, this approach records TTY input using the audit subsystem, correlated with other audit events, and it is completely transparent to the user-space application (e.g. the console ioctls still work). TTY input auditing works on a higher level than auditing all system calls within the session, which would produce an overwhelming amount of mostly useless audit events. Add an "audit_tty" attribute, inherited across fork (). Data read from TTYs by process with the attribute is sent to the audit subsystem by the kernel. The audit netlink interface is extended to allow modifying the audit_tty attribute, and to allow sending explanatory audit events from user-space (for example, a shell might send an event containing the final command, after the interactive command-line editing and history expansion is performed, which might be difficult to decipher from the TTY input alone). Because the "audit_tty" attribute is inherited across fork (), it would be set e.g. for sshd restarted within an audited session. To prevent this, the audit_tty attribute is cleared when a process with no open TTY file descriptors (e.g. after daemon startup) opens a TTY. See https://www.redhat.com/archives/linux-audit/2007-June/msg00000.html for a more detailed rationale document for an older version of this patch. [akpm@linux-foundation.org: build fix] Signed-off-by: Miloslav Trmac <mitr@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Paul Fulghum <paulkf@microgate.com> Cc: Casey Schaufler <casey@schaufler-ca.com> Cc: Steve Grubb <sgrubb@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-06-08[NetLabel]: consolidate the struct socket/sock handling to just struct sockPaul Moore
The current NetLabel code has some redundant APIs which allow both "struct socket" and "struct sock" types to be used; this may have made sense at some point but it is wasteful now. Remove the functions that operate on sockets and convert the callers. Not only does this make the code smaller and more consistent but it pushes the locking burden up to the caller which can be more intelligent about the locks. Also, perform the same conversion (socket to sock) on the SELinux/NetLabel glue code where it make sense. Signed-off-by: Paul Moore <paul.moore@hp.com> Acked-by: James Morris <jmorris@namei.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-06-07[NETLINK]: Mark netlink policies constPatrick McHardy
Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-04-26SELinux: extract the NetLabel SELinux support from the security serverPaul Moore
Up until this patch the functions which have provided NetLabel support to SELinux have been integrated into the SELinux security server, which for various reasons is not really ideal. This patch makes an effort to extract as much of the NetLabel support from the security server as possibile and move it into it's own file within the SELinux directory structure. Signed-off-by: Paul Moore <paul.moore@hp.com> Signed-off-by: James Morris <jmorris@namei.org>
2007-02-28[NET]: Fix kfree(skb)Patrick McHardy
Signed-off-by: Patrick McHardy <kaber@trash.net> Acked-by: Paul Moore <paul.moore@hp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-02-10[NET] NETLABEL: Fix whitespace errors.YOSHIFUJI Hideaki
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-01-09NetLabel: correct CIPSO tag handling when adding new DOI definitionsPaul Moore
The current netlbl_cipsov4_add_common() function has two problems which are fixed with this patch. The first is an off-by-one bug where it is possibile to overflow the doi_def->tags[] array. The second is a bug where the same doi_def->tags[] array was not always fully initialized, which caused sporadic failures. Signed-off-by: Paul Moore <paul.moore@hp.com> Signed-off-by: James Morris <jmorris@namei.org>