Commit 5bfcbd22ee ("apparmor: Enable tuning of policy paranoid load for
embedded systems") introduces the config SECURITY_APPARMOR_PARANOID_LOAD,
but then refers in the code to SECURITY_PARANOID_LOAD; note the missing
APPARMOR in the middle.
Correct this to the introduced and intended config option.
Fixes: 5bfcbd22ee ("apparmor: Enable tuning of policy paranoid load for embedded systems")
Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
AppArmor split out task oriented controls to their own logical file
a while ago. Ptrace mediation is better grouped with task than
ipc, so move it.
Signed-off-by: John Johansen <john.johansen@canonical.com>
Allow labels to have debug flags that can be used to trigger debug output
only from profiles/labels that are marked. This can help reduce debug
output by allowing debug to be target to a specific confinement condition.
Signed-off-by: John Johansen <john.johansen@canonical.com>
When finding the profile via patterned attachments, the longest left
match is being set to the static compile time value and not using the
runtime computed value.
Fix this by setting the candidate value to the greater of the
precomputed value or runtime computed value.
Fixes: 21f6066105 ("apparmor: improve overlapping domain attachment resolution")
Signed-off-by: John Johansen <john.johansen@canonical.com>
When loading a profile that is set to unconfined mode, that label
flag is not set when it should be. Ensure it is set so that when
used in a label the unconfined check will be applied correctly.
Fixes: 038165070a ("apparmor: allow setting any profile into the unconfined state")
Signed-off-by: John Johansen <john.johansen@canonical.com>
Remove warnings found by running scripts/kernel-doc, which is caused by
using 'make W=1'.
security/apparmor/policy_ns.c:65: warning: Function parameter or member 'curr' not described in 'aa_ns_name'
security/apparmor/policy_ns.c:65: warning: Function parameter or member 'view' not described in 'aa_ns_name'
security/apparmor/policy_ns.c:65: warning: Function parameter or member 'subns' not described in 'aa_ns_name'
security/apparmor/policy_ns.c:65: warning: expecting prototype for aa_na_name(). Prototype was for aa_ns_name() instead
security/apparmor/policy_ns.c:214: warning: Function parameter or member 'view' not described in '__aa_lookupn_ns'
security/apparmor/policy_ns.c:214: warning: Excess function parameter 'base' description in '__aa_lookupn_ns'
security/apparmor/policy_ns.c:297: warning: expecting prototype for aa_create_ns(). Prototype was for __aa_find_or_create_ns() instead
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Yang Li <yang.lee@linux.alibaba.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
Kernel test robot throws below warning ->
security/apparmor/policy_ns.c:83:20: warning: no previous prototype
for function 'alloc_unconfined' [-Wmissing-prototypes]
Mark it as static.
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Souptick Joarder (HPE) <jrdr.linux@gmail.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
Displaying the mode as part of the seectx takes up unnecessary memory,
makes it so we can't use refcounted secctx so we need to alloc/free on
every conversion from secid to secctx and introduces a space that
could be potentially mishandled by tooling.
Eg. In an audit record we get
subj_type=firefix (enforce)
Having the mode reported is not necessary, and might even be confusing
eg. when writing an audit rule to match the above record field you
would use
-F subj_type=firefox
ie. the mode is not included. AppArmor provides ways to find the mode
without reporting as part of the secctx. So disable this by default
before its use is wide spread and we can't. For now we add a sysctl
to control the behavior as we can't guarantee no one is using this.
Acked-by: Andrea Righi <andrea.righi@canonical.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
XArrays are a better match than IDR for how AppArmor is mapping
secids. Specifically AppArmor is trying to keep the allocation
dense. XArrays also have the advantage of avoiding the complexity IDRs
preallocation.
In addition this avoids/fixes a lockdep issue raised in the LKML thread
"Linux 5.18-rc4"
where there is a report of an interaction between apparmor and IPC,
this warning may have been spurious as the reported issue is in a
per-cpu local lock taken by the IDR. With the one side in the IPC id
allocation and the other in AppArmor's secid allocation.
Description by John Johansen <john.johansen@canonical.com>
Message-Id: <226cee6a-6ca1-b603-db08-8500cd8f77b7@gnuweeb.org>
Signed-off-by: Matthew Wilcox <willy@infradead.org>
Signed-off-by: John Johansen <john.johansen@canonical.com>
Separate kernel objects from unconfined. This is done so we can
distinguish between the two in debugging, auditing and in preparation
for being able to replace unconfined, which is not appropriate for the
kernel.
The kernel label will continue to behave similar to unconfined.
Acked-by: Jon Tourville <jon.tourville@canonical.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
With some of the stricter type checking in KUnit's EXPECT macros
removed, several casts in policy_unpack_test are no longer required.
Remove the unnecessary casts, making the conditions clearer.
Reviewed-by: Brendan Higgins <brendanhiggins@google.com>
Acked-by: John Johansen <john.johansen@canonical.com>
Signed-off-by: David Gow <davidgow@google.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
When copy_from_user failed, the memory is freed by kvfree. however the
management struct and data blob are allocated independently, so only
kvfree(data) cause a memleak issue here. Use aa_put_loaddata(data) to
fix this issue.
Fixes: a6a52579e5 ("apparmor: split load data into management struct and data blob")
Signed-off-by: Xiu Jianfeng <xiujianfeng@huawei.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
The aa_pivotroot() function has a reference counting bug in a specific
path. When aa_replace_current_label() returns on success, the function
forgets to decrement the reference count of “target”, which is
increased earlier by build_pivotroot(), causing a reference leak.
Fix it by decreasing the refcount of “target” in that path.
Fixes: 2ea3ffb778 ("apparmor: add mount mediation")
Co-developed-by: Xiyu Yang <xiyuyang19@fudan.edu.cn>
Signed-off-by: Xiyu Yang <xiyuyang19@fudan.edu.cn>
Co-developed-by: Xin Tan <tanxin.ctf@gmail.com>
Signed-off-by: Xin Tan <tanxin.ctf@gmail.com>
Signed-off-by: Xin Xiong <xiongx18@fudan.edu.cn>
Signed-off-by: John Johansen <john.johansen@canonical.com>
Remove some warnings found by running scripts/kernel-doc,
which is caused by using 'make W=1'.
security/apparmor/domain.c:137: warning: Function parameter or member
'state' not described in 'label_compound_match'
security/apparmor/domain.c:137: warning: Excess function parameter
'start' description in 'label_compound_match'
security/apparmor/domain.c:1294: warning: Excess function parameter
'onexec' description in 'aa_change_profile'
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Yang Li <yang.lee@linux.alibaba.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
IF CONFIG_SECURITY_APPARMOR_EXPORT_BINARY is disabled, there remains
some unneed references to zlib, and can result in undefined symbol
references if ZLIB_INFLATE or ZLIB_DEFLATE are not defined.
Reported-by: kernel test robot <lkp@intel.com>
Fixes: abfb9c0725 ("apparmor: make export of raw binary profile to userspace optional")
Signed-off-by: John Johansen <john.johansen@canonical.com>
Clang static analysis reports this issue
label.c:1802:3: warning: 2nd function call argument
is an uninitialized value
pr_info("%s", str);
^~~~~~~~~~~~~~~~~~
str is set from a successful call to aa_label_asxprint(&str, ...)
On failure a negative value is returned, not a -1. So change
the check.
Fixes: f1bd904175 ("apparmor: add the base fns() for domain labels")
Signed-off-by: Tom Rix <trix@redhat.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
Don't use /** for non-kernel-doc comments and change function name
aa_mangle_name to mangle_name in kernel-doc comment to Remove some
warnings found by running scripts/kernel-doc, which is caused by
using 'make W=1'.
security/apparmor/apparmorfs.c:1503: warning: Cannot understand *
on line 1503 - I thought it was a doc line
security/apparmor/apparmorfs.c:1530: warning: Cannot understand *
on line 1530 - I thought it was a doc line
security/apparmor/apparmorfs.c:1892: warning: Cannot understand *
on line 1892 - I thought it was a doc line
security/apparmor/apparmorfs.c:108: warning: expecting prototype for
aa_mangle_name(). Prototype was for mangle_name() instead
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Yang Li <yang.lee@linux.alibaba.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
Add the description of @ns_name, change function name aa_u16_chunck to
unpack_u16_chunk and verify_head to verify_header in kernel-doc comment
to remove warnings found by running scripts/kernel-doc, which is caused
by using 'make W=1'.
security/apparmor/policy_unpack.c:224: warning: expecting prototype for
aa_u16_chunck(). Prototype was for unpack_u16_chunk() instead
security/apparmor/policy_unpack.c:678: warning: Function parameter or
member 'ns_name' not described in 'unpack_profile'
security/apparmor/policy_unpack.c:950: warning: expecting prototype for
verify_head(). Prototype was for verify_header() instead
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Yang Li <yang.lee@linux.alibaba.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
Fix a spelling problem and change @mntpath to @path to remove warnings
found by running scripts/kernel-doc, which is caused by using 'make W=1'.
security/apparmor/mount.c:321: warning: Function parameter or member
'devname' not described in 'match_mnt_path_str'
security/apparmor/mount.c:321: warning: Excess function parameter
'devnme' description in 'match_mnt_path_str'
security/apparmor/mount.c:377: warning: Function parameter or member
'path' not described in 'match_mnt'
security/apparmor/mount.c:377: warning: Excess function parameter
'mntpath' description in 'match_mnt'
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Yang Li <yang.lee@linux.alibaba.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
Make use of the struct_size() helper instead of an open-coded version,
in order to avoid any potential type mistakes or integer overflows that,
in the worst scenario, could lead to heap overflows.
Also, address the following sparse warnings:
security/apparmor/lib.c:139:23: warning: using sizeof on a flexible structure
Link: https://github.com/KSPP/linux/issues/174
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: John Johansen <john.johansen@canonical.com>
When the mount check fails due to a permission check failure instead
of explicitly at one of the subcomponent checks, AppArmor is reporting
a failure in the flags match. However this is not true and AppArmor
can not attribute the error at this point to any particular component,
and should only indicate the mount failed due to missing permissions.
Fixes: 2ea3ffb778 ("apparmor: add mount mediation")
Signed-off-by: John Johansen <john.johansen@canonical.com>
Return value from nf_register_net_hooks() directly instead
of taking this in another redundant variable.
Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: Minghao Chi <chi.minghao@zte.com.cn>
Signed-off-by: CGEL ZTE <cgel.zte@gmail.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
Global quieting of denied AppArmor generated file events is not
handled correctly. Unfortunately the is checking if quieting of all
audit events is set instead of just denied events.
Fixes: 67012e8209 ("AppArmor: basic auditing infrastructure.")
Signed-off-by: John Johansen <john.johansen@canonical.com>
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Mike Salvatore <mike.salvatore@canonical.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
Currently if sha1 hashing of policy is disabled a sha1 hash symlink
to the non-existent file is created. There is now reason to create
the symlink in this case so don't do it.
Signed-off-by: John Johansen <john.johansen@canonical.com>
AppArmor by default does an extensive check on loaded policy that
can take quite some time on limited resource systems. Allow
disabling this check for embedded systems where system images are
readonly and have checksumming making the need for the embedded
policy to be fully checked to be redundant.
Note: basic policy checks are still done.
Signed-off-by: John Johansen <john.johansen@canonical.com>
Embedded systems have limited space and don't need the introspection
or checkpoint restore capability provided by exporting the raw
profile binary data so make it so make it a config option.
This will reduce run time memory use and also speed up policy loads.
Signed-off-by: John Johansen <john.johansen@canonical.com>
Update help to note this option is not needed for small embedded systems
where regular policy introspection is not used.
Signed-off-by: John Johansen <john.johansen@canonical.com>
Fix function name in lsm.c kernel-doc comment
to remove some warnings found by running scripts/kernel-doc,
which is caused by using 'make W=1'.
security/apparmor/lsm.c:819: warning: expecting prototype for
apparmor_clone_security(). Prototype was for
apparmor_sk_clone_security() instead
security/apparmor/lsm.c:923: warning: expecting prototype for
apparmor_socket_list(). Prototype was for apparmor_socket_listen()
instead
security/apparmor/lsm.c:1028: warning: expecting prototype for
apparmor_getsockopt(). Prototype was for apparmor_socket_getsockopt()
instead
security/apparmor/lsm.c:1038: warning: expecting prototype for
apparmor_setsockopt(). Prototype was for apparmor_socket_setsockopt()
instead
ecurity/apparmor/lsm.c:1061: warning: expecting prototype for
apparmor_socket_sock_recv_skb(). Prototype was for
apparmor_socket_sock_rcv_skb() instead
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Yang Li <yang.lee@linux.alibaba.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
Fix function name in security/apparmor/label.c, policy.c, procattr.c
kernel-doc comment to remove some warnings found by clang(make W=1 LLVM=1).
security/apparmor/label.c:499: warning: expecting prototype for
aa_label_next_not_in_set(). Prototype was for
__aa_label_next_not_in_set() instead
security/apparmor/label.c:2147: warning: expecting prototype for
__aa_labelset_udate_subtree(). Prototype was for
__aa_labelset_update_subtree() instead
security/apparmor/policy.c:434: warning: expecting prototype for
aa_lookup_profile(). Prototype was for aa_lookupn_profile() instead
security/apparmor/procattr.c:101: warning: expecting prototype for
aa_setprocattr_chagnehat(). Prototype was for aa_setprocattr_changehat()
instead
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Yang Li <yang.lee@linux.alibaba.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
AppArmor is prefixing secids that are converted to secctx with the =
to indicate the secctx should only be parsed from an absolute root
POV. This allows catching errors where secctx are reparsed back into
internal labels.
Unfortunately because audit is using secid to secctx conversion this
means that subject and object labels can result in a very unfortunate
== that can break audit parsing.
eg. the subj==unconfined term in the below audit message
type=USER_LOGIN msg=audit(1639443365.233:160): pid=1633 uid=0 auid=1000
ses=3 subj==unconfined msg='op=login id=1000 exe="/usr/sbin/sshd"
hostname=192.168.122.1 addr=192.168.122.1 terminal=/dev/pts/1 res=success'
Fix this by switch the prepending of = to a _. This still works as a
special character to flag this case without breaking audit. Also move
this check behind debug as it should not be needed during normal
operqation.
Fixes: 26b7899510 ("apparmor: add support for absolute root view based labels")
Reported-by: Casey Schaufler <casey@schaufler-ca.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
This KUnit update for Linux 5.19-rc1 consists of several fixes, cleanups,
and enhancements to tests and framework:
- introduces _NULL and _NOT_NULL macros to pointer error checks
- reworks kunit_resource allocation policy to fix memory leaks when
caller doesn't specify free() function to be used when allocating
memory using kunit_add_resource() and kunit_alloc_resource() funcs.
- adds ability to specify suite-level init and exit functions
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Merge tag 'linux-kselftest-kunit-5.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest
Pull KUnit updates from Shuah Khan:
"Several fixes, cleanups, and enhancements to tests and framework:
- introduce _NULL and _NOT_NULL macros to pointer error checks
- rework kunit_resource allocation policy to fix memory leaks when
caller doesn't specify free() function to be used when allocating
memory using kunit_add_resource() and kunit_alloc_resource() funcs.
- add ability to specify suite-level init and exit functions"
* tag 'linux-kselftest-kunit-5.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: (41 commits)
kunit: tool: Use qemu-system-i386 for i386 runs
kunit: fix executor OOM error handling logic on non-UML
kunit: tool: update riscv QEMU config with new serial dependency
kcsan: test: use new suite_{init,exit} support
kunit: tool: Add list of all valid test configs on UML
kunit: take `kunit_assert` as `const`
kunit: tool: misc cleanups
kunit: tool: minor cosmetic cleanups in kunit_parser.py
kunit: tool: make parser stop overwriting status of suites w/ no_tests
kunit: tool: remove dead parse_crash_in_log() logic
kunit: tool: print clearer error message when there's no TAP output
kunit: tool: stop using a shell to run kernel under QEMU
kunit: tool: update test counts summary line format
kunit: bail out of test filtering logic quicker if OOM
lib/Kconfig.debug: change KUnit tests to default to KUNIT_ALL_TESTS
kunit: Rework kunit_resource allocation policy
kunit: fix debugfs code to use enum kunit_status, not bool
kfence: test: use new suite_{init/exit} support, add .kunitconfig
kunit: add ability to specify suite-level init and exit functions
kunit: rename print_subtest_{start,end} for clarity (s/subtest/suite)
...
In order to be able to identify a file exchange with renameat2(2) and
RENAME_EXCHANGE, which will be useful for Landlock [1], propagate the
rename flags to LSMs. This may also improve performance because of the
switch from two set of LSM hook calls to only one, and because LSMs
using this hook may optimize the double check (e.g. only one lock,
reduce the number of path walks).
AppArmor, Landlock and Tomoyo are updated to leverage this change. This
should not change the current behavior (same check order), except
(different level of) speed boosts.
[1] https://lore.kernel.org/r/20220221212522.320243-1-mic@digikod.net
Cc: James Morris <jmorris@namei.org>
Cc: Kentaro Takeda <takedakn@nttdata.co.jp>
Cc: Serge E. Hallyn <serge@hallyn.com>
Acked-by: John Johansen <john.johansen@canonical.com>
Acked-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Reviewed-by: Paul Moore <paul@paul-moore.com>
Signed-off-by: Mickaël Salaün <mic@digikod.net>
Link: https://lore.kernel.org/r/20220506161102.525323-7-mic@digikod.net
Replace the PTR_EQ NULL checks with the more idiomatic and specific NULL
macros.
Acked-by: Daniel Latypov <dlatypov@google.com>
Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
Acked-by: Brendan Higgins <brendanhiggins@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Now that all of the definitions have moved out of tracehook.h into
ptrace.h, sched/signal.h, resume_user_mode.h there is nothing left in
tracehook.h so remove it.
Update the few files that were depending upon tracehook.h to bring in
definitions to use the headers they need directly.
Reviewed-by: Kees Cook <keescook@chromium.org>
Link: https://lkml.kernel.org/r/20220309162454.123006-13-ebiederm@xmission.com
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
The security_task_getsecid_subj() LSM hook invites misuse by allowing
callers to specify a task even though the hook is only safe when the
current task is referenced. Fix this by removing the task_struct
argument to the hook, requiring LSM implementations to use the
current task. While we are changing the hook declaration we also
rename the function to security_current_getsecid_subj() in an effort
to reinforce that the hook captures the subjective credentials of the
current task and not an arbitrary task on the system.
Reviewed-by: Serge Hallyn <serge@hallyn.com>
Reviewed-by: Casey Schaufler <casey@schaufler-ca.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>
It might look better if duplicated 'Returns:' comment is removed.
Signed-off-by: Austin Kim <austindh.kim@gmail.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
Make use of the struct_size() helper instead of an open-coded version,
in order to avoid any potential type mistakes or integer overflows that,
in the worse scenario, could lead to heap overflows.
Link: https://github.com/KSPP/linux/issues/160
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: John Johansen <john.johansen@canonical.com>
Uses of AA_BUG() without a message can result in the compiler warning
warning: zero-length gnu_printf format string [-Wformat-zero-length]
Fix this with a pragma for now. A larger rework of AA_BUG() will
follow.
Signed-off-by: John Johansen <john.johansen@canonical.com>
As made mention of in commit 1dea3b41e8 ("apparmor: speed up
transactional queries"), a single lock is currently used to synchronize
transactional queries. We can, use the lock allocated for each file by
VFS instead.
Signed-off-by: Hamza Mahfooz <someguy@effective-light.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
Fix gcc W=1 warning:
security/apparmor/apparmorfs.c:2125: warning: Function parameter or member 'p' not described in '__next_profile'
Signed-off-by: ChenXiaoSong <chenxiaosong2@huawei.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
Function 'aa_labelset_destroy' and 'aa_labelset_init' are declared
twice, so remove the repeated declaration and unnecessary blank line.
Cc: John Johansen <john.johansen@canonical.com>
Cc: James Morris <jmorris@namei.org>
Cc: "Serge E. Hallyn" <serge@hallyn.com>
Signed-off-by: Shaokun Zhang <zhangshaokun@hisilicon.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
Building with 'make W=1' shows a warning for an empty macro:
security/apparmor/label.c: In function '__label_update':
security/apparmor/label.c:2096:59: error: suggest braces around empty body in an 'else' statement [-Werror=empty-body]
2096 | AA_BUG(labels_ns(label) != labels_ns(new));
Change the macro definition to use no_printk(), which improves
format string checking and avoids the warning.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: John Johansen <john.johansen@canonical.com>
The check was incorrectly treating a returned error as a boolean.
Fixes: 31ec99e133 ("apparmor: switch to apparmor to internal capable check for policy management")
Signed-off-by: John Johansen <john.johansen@canonical.com>
Using get_unaligned() on a u8 pointer is pointless, and will
result in a compiler warning after a planned cleanup:
In file included from arch/x86/include/generated/asm/unaligned.h:1,
from security/apparmor/policy_unpack.c:16:
security/apparmor/policy_unpack.c: In function 'unpack_u8':
include/asm-generic/unaligned.h:13:15: error: 'packed' attribute ignored for field of type 'u8' {aka 'unsigned char'} [-Werror=attributes]
13 | const struct { type x __packed; } *__pptr = (typeof(__pptr))(ptr); \
| ^
Simply dereference this pointer directly.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: John Johansen <john.johansen@canonical.com>
Pull misc vfs updates from Al Viro:
"Assorted stuff all over the place"
* 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
useful constants: struct qstr for ".."
hostfs_open(): don't open-code file_dentry()
whack-a-mole: kill strlen_user() (again)
autofs: should_expire() argument is guaranteed to be positive
apparmor:match_mn() - constify devpath argument
buffer: a small optimization in grow_buffers
get rid of autofs_getpath()
constify dentry argument of dentry_path()/dentry_path_raw()
