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2017-01-16apparmor: add check for apparmor enabled in module parameters missing itJohn Johansen
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16apparmor: add per cpu work buffers to avoid allocating buffers at every hookJohn Johansen
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16apparmor: sysctl to enable unprivileged user ns AppArmor policy loadingTyler Hicks
If this sysctl is set to non-zero and a process with CAP_MAC_ADMIN in the root namespace has created an AppArmor policy namespace, unprivileged processes will be able to change to a profile in the newly created AppArmor policy namespace and, if the profile allows CAP_MAC_ADMIN and appropriate file permissions, will be able to load policy in the respective policy namespace. Signed-off-by: Tyler Hicks <tyhicks@canonical.com> Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16apparmor: support querying extended trusted helper extra dataWilliam Hua
Allow a profile to carry extra data that can be queried via userspace. This provides a means to store extra data in a profile that a trusted helper can extract and use from live policy. Signed-off-by: William Hua <william.hua@canonical.com> Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16apparmor: update cap audit to check SECURITY_CAP_NOAUDITJohn Johansen
apparmor should be checking the SECURITY_CAP_NOAUDIT constant. Also in complain mode make it so apparmor can elect to log a message, informing of the check. Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16apparmor: make computing policy hashes conditional on kernel parameterJohn Johansen
Allow turning off the computation of the policy hashes via the apparmor.hash_policy kernel parameter. Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16apparmor: convert change_profile to use fqname later to give better controlJohn Johansen
Moving the use of fqname to later allows learning profiles to be based on the fqname request instead of just the hname. It also allows cleaning up some of the name parsing and lookup by allowing the use of the fqlookupn_profile() lib fn. Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16apparmor: fix change_hat debug outputJohn Johansen
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16apparmor: remove unused op parameter from simple_write_to_buffer()John Johansen
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16apparmor: change aad apparmor_audit_data macro to a fn macroJohn Johansen
The aad macro can replace aad strings when it is not intended to. Switch to a fn macro so it is only applied when intended. Also at the same time cleanup audit_data initialization by putting common boiler plate behind a macro, and dropping the gfp_t parameter which will become useless. Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16apparmor: change op from int to const char *John Johansen
Having ops be an integer that is an index into an op name table is awkward and brittle. Every op change requires an edit for both the op constant and a string in the table. Instead switch to using const strings directly, eliminating the need for the table that needs to be kept in sync. Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16apparmor: rename context abreviation cxt to the more standard ctxJohn Johansen
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16apparmor: fail task profile update if current_cred isn't real_credJohn Johansen
Trying to update the task cred while the task current cred is not the real cred will result in an error at the cred layer. Avoid this by failing early and delaying the update. Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16apparmor: add per policy ns .load, .replace, .remove interface filesJohn Johansen
Having per policy ns interface files helps with containers restoring policy. Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16apparmor: pass the subject profile into profile replace/removeJohn Johansen
This is just setup for new ns specific .load, .replace, .remove interface files. Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16apparmor: audit policy ns specified in policy loadJohn Johansen
Verify that profiles in a load set specify the same policy ns and audit the name of the policy ns that policy is being loaded for. Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16apparmor: allow introspecting the loaded policy pre internal transformJohn Johansen
Store loaded policy and allow introspecting it through apparmorfs. This has several uses from debugging, policy validation, and policy checkpoint and restore for containers. Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16apparmor: add ns name to the audit data for policy loadsJohn Johansen
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16apparmor: add profile and ns params to aa_may_manage_policy()John Johansen
Policy management will be expanded beyond traditional unconfined root. This will require knowning the profile of the task doing the management and the ns view. Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16apparmor: add ns being viewed as a param to policy_admin_capable()John Johansen
Prepare for a tighter pairing of user namespaces and apparmor policy namespaces, by making the ns to be viewed available. Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16apparmor: add ns being viewed as a param to policy_view_capable()John Johansen
Prepare for a tighter pairing of user namespaces and apparmor policy namespaces, by making the ns to be viewed available and checking that the user namespace level is the same as the policy ns level. This strict pairing will be relaxed once true support of user namespaces lands. Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16apparmor: allow specifying the profile doing the managementJohn Johansen
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16apparmor: allow introspecting the policy namespace nameJohn Johansen
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16apparmor: Make aa_remove_profile() callable from a different viewJohn Johansen
This is prep work for fs operations being able to remove namespaces. Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16apparmor: track ns level so it can be used to help in view checksJohn Johansen
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16apparmor: add special .null file used to "close" fds at execJohn Johansen
Borrow the special null device file from selinux to "close" fds that don't have sufficient permissions at exec time. Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16apparmor: provide userspace flag indicating binfmt_elf_mmap changeJohn Johansen
Commit 9f834ec18def ("binfmt_elf: switch to new creds when switching to new mm") changed when the creds are installed by the binfmt_elf handler. This affects which creds are used to mmap the executable into the address space. Which can have an affect on apparmor policy. Add a flag to apparmor at /sys/kernel/security/apparmor/features/domain/fix_binfmt_elf_mmap to make it possible to detect this semantic change so that the userspace tools and the regression test suite can correctly deal with the change. BugLink: http://bugs.launchpad.net/bugs/1630069 Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16apparmor: add a default null dfaJohn Johansen
Instead of testing whether a given dfa exists in every code path, have a default null dfa that is used when loaded policy doesn't provide a dfa. This will let us get rid of special casing and avoid dereference bugs when special casing is missed. Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16apparmor: allow policydb to be used as the file dfaJohn Johansen
Newer policy will combine the file and policydb dfas, allowing for better optimizations. However to support older policy we need to keep the ability to address the "file" dfa separately. So dup the policydb as if it is the file dfa and set the appropriate start state. Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16apparmor: add get_dfa() fnJohn Johansen
The dfa is currently setup to be shared (has the basis of refcounting) but currently can't be because the count can't be increased. Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16apparmor: prepare to support newer versions of policyJohn Johansen
Newer policy encodes more than just version in the version tag, so add masking to make sure the comparison remains correct. Note: this is fully compatible with older policy as it will never set the bits being masked out. Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16apparmor: add support for force complain flag to support learning modeJohn Johansen
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16apparmor: remove paranoid load switchJohn Johansen
Policy should always under go a full paranoid verification. Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16apparmor: name null-XXX profiles after the executableJohn Johansen
When possible its better to name a learning profile after the missing profile in question. This allows for both more informative names and for profile reuse. Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16apparmor: pass gfp_t parameter into profile allocationJohn Johansen
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16apparmor: refactor prepare_ns() and make usable from different viewsJohn Johansen
prepare_ns() will need to be called from alternate views, and namespaces will need to be created via different interfaces. So refactor and allow specifying the view ns. Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16apparmor: update policy_destroy to use new debug assertsJohn Johansen
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16apparmor: pass gfp param into aa_policy_init()John Johansen
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16apparmor: constify policy name and hnameJohn Johansen
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16apparmor: rename hname_tail to basenameJohn Johansen
Rename to the shorter and more familiar shell cmd name Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16apparmor: rename mediated_filesystem() to path_mediated_fs()John Johansen
Rename to indicate the test is only about whether path mediation is used, not whether other types of mediation might be used. Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16apparmor: add debug assert AA_BUG and Kconfig to control debug infoJohn Johansen
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16apparmor: add macro for bug asserts to check that a lock is heldJohn Johansen
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16apparmor: allow ns visibility question to consider subnsesJohn Johansen
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16apparmor: add fn to lookup profiles by fqnameJohn Johansen
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16apparmor: add lib fn to find the "split" for fqnamesJohn Johansen
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16apparmor: add strn version of aa_find_nsJohn Johansen
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16apparmor: add strn version of lookup_profile fnJohn Johansen
Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16apparmor: rename replacedby to proxyJohn Johansen
Proxy is shorter and a better fit than replaceby, so rename it. Signed-off-by: John Johansen <john.johansen@canonical.com>
2017-01-16apparmor: rename PFLAG_INVALID to PFLAG_STALEJohn Johansen
Invalid does not convey the meaning of the flag anymore so rename it. Signed-off-by: John Johansen <john.johansen@canonical.com>
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