For now, the io_uring mediation is limited to sqpoll and
override_creds.
Signed-off-by: Georgia Garcia <georgia.garcia@canonical.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>

Unprivileged user namespace creation is often used as a first step
in privilege escalation attacks. Instead of disabling it at the
sysrq level, which blocks its legitimate use as for setting up a sandbox,
allow control on a per domain basis.

This allows an admin to quickly lock down a system while also still
allowing legitimate use.
Reviewed-by: Georgia Garcia <georgia.garcia@canonical.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>

unprivileged unconfined can use change_profile to alter the confinement
set by the mac admin.

Allow restricting unprivileged unconfined by still allowing change_profile
but stacking the change against unconfined. This allows unconfined to
still apply system policy but allows the task to enter the new confinement.

If unprivileged unconfined is required a sysctl is provided to switch
to the previous behavior.
Reviewed-by: Georgia Garcia <georgia.garcia@canonical.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>

While disconnected.path has been available for a while it was never
properly advertised as a feature. Fix this so that userspace doesn't
need special casing to handle it.
Reviewed-by: Georgia Garcia <georgia.garcia@canonical.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>

With the move to permission tables the dfa is no longer a stand
alone entity when used, needing a minimum of a permission table.
However it still could be shared among different pdbs each using
a different permission table.

Instead of duping the permission table when sharing a pdb, add a
refcount to the pdb so it can be easily shared.
Reviewed-by: Georgia Garcia <georgia.garcia@canonical.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>

Improve policy load failure messages by identifying which dfa the
verification check failed in.
Reviewed-by: Georgia Garcia <georgia.garcia@canonical.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>

The cred is needed to properly audit some messages, and will be needed
in the future for uid conditional mediation. So pass it through to
where the apparmor_audit_data struct gets defined.
Reviewed-by: Georgia Garcia <georgia.garcia@canonical.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>

rename audit_data's label field to subj_label to better reflect its
use. Also at the same time drop unneeded assignments to ->subj_label
as the later call to aa_check_perms will do the assignment if needed.
Reviewed-by: Georgia Garcia <georgia.garcia@canonical.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>

Everywhere where common_audit_data is used apparmor audit_data is also
used. We can simplify the code and drop the use of the aad macro
everywhere by combining the two structures.
Reviewed-by: Georgia Garcia <georgia.garcia@canonical.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>

In preparation for LSM stacking rework the macro to an inline fn
Reviewed-by: Georgia Garcia <georgia.garcia@canonical.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>

When running will-it-scale[1] open2_process testcase, in a system with a
large number of cores, a bottleneck in retrieving the current task
secid was detected:

27.73% ima_file_check;do_open (inlined);path_openat;do_filp_open;do_sys_openat2;__x64_sys_openat;do_syscall_x64 (inlined);do_syscall_64;entry_SYSCALL_64_after_hwframe (inlined);__libc_open64 (inlined)
    27.72%     0.01%  [kernel.vmlinux]      [k] security_current_getsecid_subj             -      -
27.71% security_current_getsecid_subj;ima_file_check;do_open (inlined);path_openat;do_filp_open;do_sys_openat2;__x64_sys_openat;do_syscall_x64 (inlined);do_syscall_64;entry_SYSCALL_64_after_hwframe (inlined);__libc_open64 (inlined)
    27.71%    27.68%  [kernel.vmlinux]      [k] apparmor_current_getsecid_subj             -      -
19.94% __refcount_add (inlined);__refcount_inc (inlined);refcount_inc (inlined);kref_get (inlined);aa_get_label (inlined);aa_get_label (inlined);aa_get_current_label (inlined);apparmor_current_getsecid_subj;security_current_getsecid_subj;ima_file_check;do_open (inlined);path_openat;do_filp_open;do_sys_openat2;__x64_sys_openat;do_syscall_x64 (inlined);do_syscall_64;entry_SYSCALL_64_after_hwframe (inlined);__libc_open64 (inlined)
7.72% __refcount_sub_and_test (inlined);__refcount_dec_and_test (inlined);refcount_dec_and_test (inlined);kref_put (inlined);aa_put_label (inlined);aa_put_label (inlined);apparmor_current_getsecid_subj;security_current_getsecid_subj;ima_file_check;do_open (inlined);path_openat;do_filp_open;do_sys_openat2;__x64_sys_openat;do_syscall_x64 (inlined);do_syscall_64;entry_SYSCALL_64_after_hwframe (inlined);__libc_open64 (inlined)

A large amount of time was spent in the refcount.

The most common case is that the current task label is available, and
no need to take references for that one. That is exactly what the
critical section helpers do, make use of them.

New perf output:

39.12% vfs_open;path_openat;do_filp_open;do_sys_openat2;__x64_sys_openat;do_syscall_64;entry_SYSCALL_64_after_hwframe;__libc_open64 (inlined)
    39.07%     0.13%  [kernel.vmlinux]          [k] do_dentry_open                                                               -      -
39.05% do_dentry_open;vfs_open;path_openat;do_filp_open;do_sys_openat2;__x64_sys_openat;do_syscall_64;entry_SYSCALL_64_after_hwframe;__libc_open64 (inlined)
    38.71%     0.01%  [kernel.vmlinux]          [k] security_file_open                                                           -      -
38.70% security_file_open;do_dentry_open;vfs_open;path_openat;do_filp_open;do_sys_openat2;__x64_sys_openat;do_syscall_64;entry_SYSCALL_64_after_hwframe;__libc_open64 (inlined)
    38.65%    38.60%  [kernel.vmlinux]          [k] apparmor_file_open                                                           -      -
38.65% apparmor_file_open;security_file_open;do_dentry_open;vfs_open;path_openat;do_filp_open;do_sys_openat2;__x64_sys_openat;do_syscall_64;entry_SYSCALL_64_after_hwframe;__libc_open64 (inlined)

The result is a throughput improvement of around 20% across the board
on the open2 testcase. On more realistic workloads the impact should
be much less.

[1] https://github.com/antonblanchard/will-it-scaleSigned-off-by: Vinicius Costa Gomes <vinicius.gomes@intel.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>

These functions are not used now, remove them.
Signed-off-by: Xiu Jianfeng <xiujianfeng@huawei.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>

The whole function is guarded by CONFIG_SECURITY_APPARMOR_EXPORT_BINARY,
so the #ifdef here is redundant, remove it.
Signed-off-by: Xiu Jianfeng <xiujianfeng@huawei.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>

profile->disconnected was storing an invalid reference to the
disconnected path. Fix it by duplicating the string using
aa_unpack_strdup and freeing accordingly.

Fixes: 72c8a768 ("apparmor: allow profiles to provide info to disconnected paths")
Signed-off-by: Georgia Garcia <georgia.garcia@canonical.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>

The last usage of PROF_{ADD,REPLACE} were removed by commit 18e99f19
("apparmor: provide finer control over policy management"). So remove
these two unused macros.
Signed-off-by: GONG, Ruiqi <gongruiqi1@huawei.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>

After changes in commit 33bf60ca ("LSM: Infrastructure management of
the file security"), aa_alloc_file_ctx() and aa_free_file_ctx() are no
longer used, so remove them, and also remove aa_get_file_label() because
it seems that it's never been used before.
Signed-off-by: Xiu Jianfeng <xiujianfeng@huawei.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>

The implementions of these declarations do not exist, remove them all.
Signed-off-by: Xiu Jianfeng <xiujianfeng@huawei.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>

[PATCH -next 05/11] apparmor: Fix kernel-doc warnings in apparmor/label.c
missed updating the Returns comment for the new parameter names

[PATCH -next 05/11] apparmor: Fix kernel-doc warnings in apparmor/label.c
Added the @size parameter comment without mentioning it is a return
value.
Signed-off-by: John Johansen <john.johansen@canonical.com>

Fix kernel-doc warnings:

security/apparmor/policy.c:294: warning: Function parameter or
member 'proxy' not described in 'aa_alloc_profile'
security/apparmor/policy.c:785: warning: Function parameter or
member 'label' not described in 'aa_policy_view_capable'
security/apparmor/policy.c:785: warning: Function parameter or
member 'ns' not described in 'aa_policy_view_capable'
security/apparmor/policy.c:847: warning: Function parameter or
member 'ns' not described in 'aa_may_manage_policy'
security/apparmor/policy.c:964: warning: Function parameter or
member 'hname' not described in '__lookup_replace'
security/apparmor/policy.c:964: warning: Function parameter or
member 'info' not described in '__lookup_replace'
security/apparmor/policy.c:964: warning: Function parameter or
member 'noreplace' not described in '__lookup_replace'
security/apparmor/policy.c:964: warning: Function parameter or
member 'ns' not described in '__lookup_replace'
security/apparmor/policy.c:964: warning: Function parameter or
member 'p' not described in '__lookup_replace'
Signed-off-by: Gaosheng Cui <cuigaosheng1@huawei.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>

Fix kernel-doc warnings:

security/apparmor/policy_compat.c:151: warning: Function parameter
or member 'size' not described in 'compute_fperms'
Signed-off-by: Gaosheng Cui <cuigaosheng1@huawei.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>

Fix kernel-doc warnings:

security/apparmor/policy_unpack.c:1173: warning: Function parameter
or member 'table_size' not described in 'verify_dfa_accept_index'
Signed-off-by: Gaosheng Cui <cuigaosheng1@huawei.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>

Fix kernel-doc warnings:

security/apparmor/resource.c:111: warning: Function parameter or
member 'label' not described in 'aa_task_setrlimit'
security/apparmor/resource.c:111: warning: Function parameter or
member 'new_rlim' not described in 'aa_task_setrlimit'
security/apparmor/resource.c:111: warning: Function parameter or
member 'resource' not described in 'aa_task_setrlimit'
security/apparmor/resource.c:111: warning: Function parameter or
member 'task' not described in 'aa_task_setrlimit'
Signed-off-by: Gaosheng Cui <cuigaosheng1@huawei.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>

Fix kernel-doc warnings:

security/apparmor/match.c:148: warning: Function parameter or member
'tables' not described in 'verify_table_headers'
security/apparmor/match.c:289: warning: Excess function parameter
'kr' description in 'aa_dfa_free_kref'
security/apparmor/match.c:289: warning: Function parameter or member
'kref' not described in 'aa_dfa_free_kref'
Signed-off-by: Gaosheng Cui <cuigaosheng1@huawei.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>

Fix kernel-doc warnings:

security/apparmor/lib.c:33: warning: Excess function parameter
'str' description in 'aa_free_str_table'
security/apparmor/lib.c:33: warning: Function parameter or member
't' not described in 'aa_free_str_table'
security/apparmor/lib.c:94: warning: Function parameter or
member 'n' not described in 'skipn_spaces'
security/apparmor/lib.c:390: warning: Excess function parameter
'deny' description in 'aa_check_perms'
Signed-off-by: Gaosheng Cui <cuigaosheng1@huawei.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>

Fix kernel-doc warnings:

security/apparmor/label.c:166: warning: Excess function parameter
'n' description in 'vec_cmp'
security/apparmor/label.c:166: warning: Excess function parameter
'vec' description in 'vec_cmp'
security/apparmor/label.c:166: warning: Function parameter or member
'an' not described in 'vec_cmp'
security/apparmor/label.c:166: warning: Function parameter or member
'bn' not described in 'vec_cmp'
security/apparmor/label.c:166: warning: Function parameter or member
'b' not described in 'vec_cmp'
security/apparmor/label.c:2051: warning: Function parameter or member
'label' not described in '__label_update'
security/apparmor/label.c:266: warning: Function parameter or member
'flags' not described in 'aa_vec_unique'
security/apparmor/label.c:594: warning: Excess function parameter
'l' description in '__label_remove'
security/apparmor/label.c:594: warning: Function parameter or member
'label' not described in '__label_remove'
security/apparmor/label.c:929: warning: Function parameter or member
'label' not described in 'aa_label_insert'
security/apparmor/label.c:929: warning: Function parameter or member
'ls' not described in 'aa_label_insert'
security/apparmor/label.c:1221: warning: Excess function parameter
'ls' description in 'aa_label_merge'
security/apparmor/label.c:1302: warning: Excess function parameter
'start' description in 'label_compound_match'
security/apparmor/label.c:1302: warning: Function parameter or member
'rules' not described in 'label_compound_match'
security/apparmor/label.c:1302: warning: Function parameter or member
'state' not described in 'label_compound_match'
security/apparmor/label.c:2051: warning: Function parameter or member
'label' not described in '__label_update'
Signed-off-by: Gaosheng Cui <cuigaosheng1@huawei.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>

Fix kernel-doc warnings:

security/apparmor/file.c:177: warning: Excess function parameter
'dfa' description in 'aa_lookup_fperms'
security/apparmor/file.c:177: warning: Function parameter or member
'file_rules' not described in 'aa_lookup_fperms'
security/apparmor/file.c:202: warning: Excess function parameter
'dfa' description in 'aa_str_perms'
security/apparmor/file.c:202: warning: Excess function parameter
'state' description in 'aa_str_perms'
security/apparmor/file.c:202: warning: Function parameter or member
'file_rules' not described in 'aa_str_perms'
security/apparmor/file.c:202: warning: Function parameter or member
'start' not described in 'aa_str_perms'
Signed-off-by: Gaosheng Cui <cuigaosheng1@huawei.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>

Fix kernel-doc warnings:

security/apparmor/domain.c:279: warning: Function parameter or
member 'perms' not described in 'change_profile_perms'
security/apparmor/domain.c:380: warning: Function parameter or
member 'bprm' not described in 'find_attach'
security/apparmor/domain.c:380: warning: Function parameter or
member 'head' not described in 'find_attach'
security/apparmor/domain.c:380: warning: Function parameter or
member 'info' not described in 'find_attach'
security/apparmor/domain.c:380: warning: Function parameter or
member 'name' not described in 'find_attach'
security/apparmor/domain.c:558: warning: Function parameter or
member 'info' not described in 'x_to_label'
Signed-off-by: Gaosheng Cui <cuigaosheng1@huawei.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>

Fix kernel-doc warnings:

security/apparmor/capability.c:45: warning: Function parameter
or member 'ab' not described in 'audit_cb'
security/apparmor/capability.c:45: warning: Function parameter
or member 'va' not described in 'audit_cb'
Signed-off-by: Gaosheng Cui <cuigaosheng1@huawei.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>

Fix kernel-doc warnings:

security/apparmor/audit.c:150: warning: Function parameter or
member 'type' not described in 'aa_audit_msg'
Signed-off-by: Gaosheng Cui <cuigaosheng1@huawei.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>

These allocations should use the gfp flags from the caller instead of
GFP_KERNEL.  But from what I can see, all the callers pass in GFP_KERNEL
so this does not affect runtime.

Fixes: e31dd6e412f7 ("apparmor: fix: kzalloc perms tables for shared dfas")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: John Johansen <john.johansen@canonical.com>

Userspace won't load policy using extended perms unless it knows the
kernel can handle them. Advertise that extended perms are supported in
the feature set.
Signed-off-by: John Johansen <john.johansen@canonical.com>
Reviewed-by: Jon Tourville <jontourville@me.com>

SOCK_ctx() doesn't seem to be used anywhere in the code, so remove it.
Signed-off-by: GONG, Ruiqi <gongruiqi@huaweicloud.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>

Change the return type to void since it always return 0, and no need
to do the checking in aa_set_current_onexec.
Signed-off-by: Quanfa Fu <quanfafu@gmail.com>
Reviewed-by: "Tyler Hicks (Microsoft)" <code@tyhicks.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>

We just sorted the entries and fields last release, so just out of a
perverse sense of curiosity, I decided to see if we can keep things
ordered for even just one release.

The answer is "No. No we cannot".

I suggest that all kernel developers will need weekly training sessions,
involving a lot of Big Bird and Sesame Street.  And at the yearly
maintainer summit, we will all sing the alphabet song together.

I doubt I will keep doing this.  At some point "perverse sense of
curiosity" turns into just a cold dark place filled with sadness and
despair.

Repeats: 80e62bc8 ("MAINTAINERS: re-sort all entries and fields")
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Pull dma-mapping fixes from Christoph Hellwig:

 - swiotlb area sizing fixes (Petr Tesarik)

* tag 'dma-mapping-6.5-2023-07-09' of git://git.infradead.org/users/hch/dma-mapping:
  swiotlb: reduce the number of areas to match actual memory pool size
  swiotlb: always set the number of areas before allocating the pool

Pull irq update from Borislav Petkov:

 - Optimize IRQ domain's name assignment

* tag 'irq_urgent_for_v6.5_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  irqdomain: Use return value of strreplace()

Pull x86 fpu fix from Borislav Petkov:

 - Do FPU AP initialization on Xen PV too which got missed by the recent
   boot reordering work

* tag 'x86_urgent_for_v6.5_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/xen: Fix secondary processors' FPU initialization

Pull x86 fix from Thomas Gleixner:
 "A single fix for the mechanism to park CPUs with an INIT IPI.

  On shutdown or kexec, the kernel tries to park the non-boot CPUs with
  an INIT IPI. But the same code path is also used by the crash utility.
  If the CPU which panics is not the boot CPU then it sends an INIT IPI
  to the boot CPU which resets the machine.

  Prevent this by validating that the CPU which runs the stop mechanism
  is the boot CPU. If not, leave the other CPUs in HLT"

* tag 'x86-core-2023-07-09' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/smp: Don't send INIT to boot CPU

Pull MIPS fixes from Thomas Bogendoerfer:

 - fixes for KVM

 - fix for loongson build and cpu probing

 - DT fixes

* tag 'mips_6.5_1' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux:
  MIPS: kvm: Fix build error with KVM_MIPS_DEBUG_COP0_COUNTERS enabled
  MIPS: dts: add missing space before {
  MIPS: Loongson: Fix build error when make modules_install
  MIPS: KVM: Fix NULL pointer dereference
  MIPS: Loongson: Fix cpu_probe_loongson() again