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The copy_from_user() function returns the number of bytes remaining to
be copied on a failure. Such failures should return -EFAULT to high
levels.
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Fixes: 3f805f8cc2 ("LoadPin: Enable loading from trusted dm-verity devices")
Cc: Matthias Kaehlcke <mka@chromium.org>
Cc: James Morris <jmorris@namei.org>
Cc: "Serge E. Hallyn" <serge@hallyn.com>
Cc: linux-security-module@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
- Convert secid mapping to XArrays instead of IDR
- Add a kernel label to use on kernel objects
- Extend policydb permission set by making use of the xbits
- Make export of raw binary profile to userspace optional
- Enable tuning of policy paranoid load for embedded systems
- Don't create raw_sha1 symlink if sha1 hashing is disabled
- Allow labels to carry debug flags
+ Cleanups
- Update MAINTAINERS file
- Use struct_size() helper in kmalloc()
- Move ptrace mediation to more logical task.{h,c}
- Resolve uninitialized symbol warnings
- Remove redundant ret variable
- Mark alloc_unconfined() as static
- Update help description of policy hash for introspection
- Remove some casts which are no-longer required
+ Bug Fixes
- Fix aa_label_asxprint return check
- Fix reference count leak in aa_pivotroot()
- Fix memleak in aa_simple_write_to_buffer()
- Fix kernel doc comments
- Fix absroot causing audited secids to begin with =
- Fix quiet_denied for file rules
- Fix failed mount permission check error message
- Disable showing the mode as part of a secid to secctx
- Fix setting unconfined mode on a loaded profile
- Fix overlapping attachment computation
- Fix undefined reference to `zlib_deflate_workspacesize'
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Merge tag 'apparmor-pr-2022-08-08' of git://git.kernel.org/pub/scm/linux/kernel/git/jj/linux-apparmor
Pull AppArmor updates from John Johansen:
"This is mostly cleanups and bug fixes with the one bigger change being
Mathew Wilcox's patch to use XArrays instead of the IDR from the
thread around the locking weirdness.
Features:
- Convert secid mapping to XArrays instead of IDR
- Add a kernel label to use on kernel objects
- Extend policydb permission set by making use of the xbits
- Make export of raw binary profile to userspace optional
- Enable tuning of policy paranoid load for embedded systems
- Don't create raw_sha1 symlink if sha1 hashing is disabled
- Allow labels to carry debug flags
Cleanups:
- Update MAINTAINERS file
- Use struct_size() helper in kmalloc()
- Move ptrace mediation to more logical task.{h,c}
- Resolve uninitialized symbol warnings
- Remove redundant ret variable
- Mark alloc_unconfined() as static
- Update help description of policy hash for introspection
- Remove some casts which are no-longer required
Bug Fixes:
- Fix aa_label_asxprint return check
- Fix reference count leak in aa_pivotroot()
- Fix memleak in aa_simple_write_to_buffer()
- Fix kernel doc comments
- Fix absroot causing audited secids to begin with =
- Fix quiet_denied for file rules
- Fix failed mount permission check error message
- Disable showing the mode as part of a secid to secctx
- Fix setting unconfined mode on a loaded profile
- Fix overlapping attachment computation
- Fix undefined reference to `zlib_deflate_workspacesize'"
* tag 'apparmor-pr-2022-08-08' of git://git.kernel.org/pub/scm/linux/kernel/git/jj/linux-apparmor: (34 commits)
apparmor: Update MAINTAINERS file with new email address
apparmor: correct config reference to intended one
apparmor: move ptrace mediation to more logical task.{h,c}
apparmor: extend policydb permission set by making use of the xbits
apparmor: allow label to carry debug flags
apparmor: fix overlapping attachment computation
apparmor: fix setting unconfined mode on a loaded profile
apparmor: Fix some kernel-doc comments
apparmor: Mark alloc_unconfined() as static
apparmor: disable showing the mode as part of a secid to secctx
apparmor: Convert secid mapping to XArrays instead of IDR
apparmor: add a kernel label to use on kernel objects
apparmor: test: Remove some casts which are no-longer required
apparmor: Fix memleak in aa_simple_write_to_buffer()
apparmor: fix reference count leak in aa_pivotroot()
apparmor: Fix some kernel-doc comments
apparmor: Fix undefined reference to `zlib_deflate_workspacesize'
apparmor: fix aa_label_asxprint return check
apparmor: Fix some kernel-doc comments
apparmor: Fix some kernel-doc comments
...
This KUnit update for Linux 5.20-rc1 consists of several fixes and an
important feature to discourage running KUnit tests on production
systems. Running tests on a production system could leave the system
in a bad state. This new feature adds:
- adds a new taint type, TAINT_TEST to signal that a test has been run.
This should discourage people from running these tests on production
systems, and to make it easier to tell if tests have been run
accidentally (by loading the wrong configuration, etc.)
- several documentation and tool enhancements and fixes.
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Merge tag 'linux-kselftest-kunit-5.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest
Pull KUnit updates from Shuah Khan:
"This consists of several fixes and an important feature to discourage
running KUnit tests on production systems. Running tests on a
production system could leave the system in a bad state.
Summary:
- Add a new taint type, TAINT_TEST to signal that a test has been
run.
This should discourage people from running these tests on
production systems, and to make it easier to tell if tests have
been run accidentally (by loading the wrong configuration, etc)
- Several documentation and tool enhancements and fixes"
* tag 'linux-kselftest-kunit-5.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: (29 commits)
Documentation: KUnit: Fix example with compilation error
Documentation: kunit: Add CLI args for kunit_tool
kcsan: test: Add a .kunitconfig to run KCSAN tests
kunit: executor: Fix a memory leak on failure in kunit_filter_tests
clk: explicitly disable CONFIG_UML_PCI_OVER_VIRTIO in .kunitconfig
mmc: sdhci-of-aspeed: test: Use kunit_test_suite() macro
nitro_enclaves: test: Use kunit_test_suite() macro
thunderbolt: test: Use kunit_test_suite() macro
kunit: flatten kunit_suite*** to kunit_suite** in .kunit_test_suites
kunit: unify module and builtin suite definitions
selftest: Taint kernel when test module loaded
module: panic: Taint the kernel when selftest modules load
Documentation: kunit: fix example run_kunit func to allow spaces in args
Documentation: kunit: Cleanup run_wrapper, fix x-ref
kunit: test.h: fix a kernel-doc markup
kunit: tool: Enable virtio/PCI by default on UML
kunit: tool: make --kunitconfig repeatable, blindly concat
kunit: add coverage_uml.config to enable GCOV on UML
kunit: tool: refactor internal kconfig handling, allow overriding
kunit: tool: introduce --qemu_args
...
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Merge tag 'integrity-v6.0' of git://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity
Pull integrity updates from Mimi Zohar:
"Aside from the one EVM cleanup patch, all the other changes are kexec
related.
On different architectures different keyrings are used to verify the
kexec'ed kernel image signature. Here are a number of preparatory
cleanup patches and the patches themselves for making the keyrings -
builtin_trusted_keyring, .machine, .secondary_trusted_keyring, and
.platform - consistent across the different architectures"
* tag 'integrity-v6.0' of git://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity:
kexec, KEYS, s390: Make use of built-in and secondary keyring for signature verification
arm64: kexec_file: use more system keyrings to verify kernel image signature
kexec, KEYS: make the code in bzImage64_verify_sig generic
kexec: clean up arch_kexec_kernel_verify_sig
kexec: drop weak attribute from functions
kexec_file: drop weak attribute from functions
evm: Use IS_ENABLED to initialize .enabled
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Merge tag 'safesetid-6.0' of https://github.com/micah-morton/linux
Pull SafeSetID updates from Micah Morton:
"This contains one commit that touches common kernel code, one that
adds functionality internal to the SafeSetID LSM code, and a few other
commits that only modify the SafeSetID LSM selftest.
The commit that touches common kernel code simply adds an LSM hook in
the setgroups() syscall that mirrors what is done for the existing LSM
hooks in the setuid() and setgid() syscalls. This commit combined with
the SafeSetID-specific one allow the LSM to filter setgroups() calls
according to configured rule sets in the same way that is already done
for setuid() and setgid()"
* tag 'safesetid-6.0' of https://github.com/micah-morton/linux:
LSM: SafeSetID: add setgroups() testing to selftest
LSM: SafeSetID: Add setgroups() security policy handling
security: Add LSM hook to setgroups() syscall
LSM: SafeSetID: add GID testing to selftest
LSM: SafeSetID: selftest cleanup and prepare for GIDs
LSM: SafeSetID: fix userns bug in selftest
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Merge tag 'Smack-for-6.0' of https://github.com/cschaufler/smack-next
Pull msack updates from Casey Schaufler:
"Two minor code clean-ups for Smack.
One removes a touch of dead code and the other replaces an instance of
kzalloc + strncpy with kstrndup"
* tag 'Smack-for-6.0' of https://github.com/cschaufler/smack-next:
smack: Remove the redundant lsm_inode_alloc
smack: Replace kzalloc + strncpy with kstrndup
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Merge tag 'selinux-pr-20220801' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux
Pull selinux updates from Paul Moore:
"A relatively small set of patches for SELinux this time, eight patches
in total with really only one significant change.
The highlights are:
- Add support for proper labeling of memfd_secret anonymous inodes.
This will allow LSMs that implement the anonymous inode hooks to
apply security policy to memfd_secret() fds.
- Various small improvements to memory management: fixed leaks, freed
memory when needed, boundary checks.
- Hardened the selinux_audit_data struct with __randomize_layout.
- A minor documentation tweak to fix a formatting/style issue"
* tag 'selinux-pr-20220801' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux:
selinux: selinux_add_opt() callers free memory
selinux: Add boundary check in put_entry()
selinux: fix memleak in security_read_state_kernel()
docs: selinux: add '=' signs to kernel boot options
mm: create security context for memfd_secret inodes
selinux: fix typos in comments
selinux: drop unnecessary NULL check
selinux: add __randomize_layout to selinux_audit_data
- Fix Sparse warnings with randomizd kstack (GONG, Ruiqi)
- Replace uintptr_t with unsigned long in usercopy (Jason A. Donenfeld)
- Fix Clang -Wforward warning in LKDTM (Justin Stitt)
- Fix comment to correctly refer to STRICT_DEVMEM (Lukas Bulwahn)
- Introduce dm-verity binding logic to LoadPin LSM (Matthias Kaehlcke)
- Clean up warnings and overflow and KASAN tests (Kees Cook)
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Merge tag 'hardening-v5.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
Pull hardening updates from Kees Cook:
- Fix Sparse warnings with randomizd kstack (GONG, Ruiqi)
- Replace uintptr_t with unsigned long in usercopy (Jason A. Donenfeld)
- Fix Clang -Wforward warning in LKDTM (Justin Stitt)
- Fix comment to correctly refer to STRICT_DEVMEM (Lukas Bulwahn)
- Introduce dm-verity binding logic to LoadPin LSM (Matthias Kaehlcke)
- Clean up warnings and overflow and KASAN tests (Kees Cook)
* tag 'hardening-v5.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
dm: verity-loadpin: Drop use of dm_table_get_num_targets()
kasan: test: Silence GCC 12 warnings
drivers: lkdtm: fix clang -Wformat warning
x86: mm: refer to the intended config STRICT_DEVMEM in a comment
dm: verity-loadpin: Use CONFIG_SECURITY_LOADPIN_VERITY for conditional compilation
LoadPin: Enable loading from trusted dm-verity devices
dm: Add verity helpers for LoadPin
stack: Declare {randomize_,}kstack_offset to fix Sparse warnings
lib: overflow: Do not define 64-bit tests on 32-bit
MAINTAINERS: Add a general "kernel hardening" section
usercopy: use unsigned long instead of uintptr_t
It's not possible for inode->i_security to be NULL here because every
inode will call inode_init_always and then lsm_inode_alloc to alloc
memory for inode->security, this is what LSM infrastructure management
do, so remove this redundant code.
Signed-off-by: Xiu Jianfeng <xiujianfeng@huawei.com>
Signed-off-by: Casey Schaufler <casey@schaufler-ca.com>
Simplify the code by using kstrndup instead of kzalloc and strncpy in
smk_parse_smack(), which meanwhile remove strncpy as [1] suggests.
[1]: https://github.com/KSPP/linux/issues/90
Signed-off-by: GONG, Ruiqi <gongruiqi1@huawei.com>
Signed-off-by: Casey Schaufler <casey@schaufler-ca.com>
loader
- Add the ability to pass the IMA measurement of kernel and bootloader
to the kexec-ed kernel
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Merge tag 'x86_kdump_for_v6.0_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 kdump updates from Borislav Petkov:
- Add the ability to pass early an RNG seed to the kernel from the boot
loader
- Add the ability to pass the IMA measurement of kernel and bootloader
to the kexec-ed kernel
* tag 'x86_kdump_for_v6.0_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/setup: Use rng seeds from setup_data
x86/kexec: Carry forward IMA measurement log on kexec
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Merge tag 'fs.idmapped.vfsuid.v5.20' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux
Pull fs idmapping updates from Christian Brauner:
"This introduces the new vfs{g,u}id_t types we agreed on. Similar to
k{g,u}id_t the new types are just simple wrapper structs around
regular {g,u}id_t types.
They allow to establish a type safety boundary in the VFS for idmapped
mounts preventing confusion betwen {g,u}ids mapped into an idmapped
mount and {g,u}ids mapped into the caller's or the filesystem's
idmapping.
An initial set of helpers is introduced that allows to operate on
vfs{g,u}id_t types. We will remove all references to non-type safe
idmapped mounts helpers in the very near future. The patches do
already exist.
This converts the core attribute changing codepaths which become
significantly easier to reason about because of this change.
Just a few highlights here as the patches give detailed overviews of
what is happening in the commit messages:
- The kernel internal struct iattr contains type safe vfs{g,u}id_t
values clearly communicating that these values have to take a given
mount's idmapping into account.
- The ownership values placed in struct iattr to change ownership are
identical for idmapped and non-idmapped mounts going forward. This
also allows to simplify stacking filesystems such as overlayfs that
change attributes In other words, they always represent the values.
- Instead of open coding checks for whether ownership changes have
been requested and an actual update of the inode is required we now
have small static inline wrappers that abstract this logic away
removing a lot of code duplication from individual filesystems that
all open-coded the same checks"
* tag 'fs.idmapped.vfsuid.v5.20' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux:
mnt_idmapping: align kernel doc and parameter order
mnt_idmapping: use new helpers in mapped_fs{g,u}id()
fs: port HAS_UNMAPPED_ID() to vfs{g,u}id_t
mnt_idmapping: return false when comparing two invalid ids
attr: fix kernel doc
attr: port attribute changes to new types
security: pass down mount idmapping to setattr hook
quota: port quota helpers mount ids
fs: port to iattr ownership update helpers
fs: introduce tiny iattr ownership update helpers
fs: use mount types in iattr
fs: add two type safe mapping helpers
mnt_idmapping: add vfs{g,u}id_t
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>
The lockdown LSM is primarily used in conjunction with UEFI Secure Boot.
This LSM may also be used on machines without UEFI. It can also be
enabled when UEFI Secure Boot is disabled. One of lockdown's features
is to prevent kexec from loading untrusted kernels. Lockdown can be
enabled through a bootparam or after the kernel has booted through
securityfs.
If IMA appraisal is used with the "ima_appraise=log" boot param,
lockdown can be defeated with kexec on any machine when Secure Boot is
disabled or unavailable. IMA prevents setting "ima_appraise=log" from
the boot param when Secure Boot is enabled, but this does not cover
cases where lockdown is used without Secure Boot.
To defeat lockdown, boot without Secure Boot and add ima_appraise=log to
the kernel command line; then:
$ echo "integrity" > /sys/kernel/security/lockdown
$ echo "appraise func=KEXEC_KERNEL_CHECK appraise_type=imasig" > \
/sys/kernel/security/ima/policy
$ kexec -ls unsigned-kernel
Add a call to verify ima appraisal is set to "enforce" whenever lockdown
is enabled. This fixes CVE-2022-21505.
Cc: stable@vger.kernel.org
Fixes: 29d3c1c8df ("kexec: Allow kexec_file() with appropriate IMA policy when locked down")
Signed-off-by: Eric Snowberg <eric.snowberg@oracle.com>
Acked-by: Mimi Zohar <zohar@linux.ibm.com>
Reviewed-by: John Haxby <john.haxby@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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>
The SafeSetID LSM has functionality for restricting setuid()/setgid()
syscalls based on its configured security policies. This patch adds the
analogous functionality for the setgroups() syscall. Security policy
for the setgroups() syscall follows the same policies that are
installed on the system for setgid() syscalls.
Signed-off-by: Micah Morton <mortonm@chromium.org>
Give the LSM framework the ability to filter setgroups() syscalls. There
are already analagous hooks for the set*uid() and set*gid() syscalls.
The SafeSetID LSM will use this new hook to ensure setgroups() calls are
allowed by the installed security policy. Tested by putting print
statement in security_task_fix_setgroups() hook and confirming that it
gets hit when userspace does a setgroups() syscall.
Acked-by: Casey Schaufler <casey@schaufler-ca.com>
Reviewed-by: Serge Hallyn <serge@hallyn.com>
Signed-off-by: Micah Morton <mortonm@chromium.org>
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Merge tag 'integrity-v5.19-fix' of git://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity
Pull integrity fixes from Mimi Zohar:
"Here are a number of fixes for recently found bugs.
Only 'ima: fix violation measurement list record' was introduced in
the current release. The rest address existing bugs"
* tag 'integrity-v5.19-fix' of git://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity:
ima: Fix potential memory leak in ima_init_crypto()
ima: force signature verification when CONFIG_KEXEC_SIG is configured
ima: Fix a potential integer overflow in ima_appraise_measurement
ima: fix violation measurement list record
Revert "evm: Fix memleak in init_desc"
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>
Use IS_ENABLED(CONFIG_XXX) instead of #ifdef/#endif statements to
initialize .enabled, minor simplicity improvement.
Signed-off-by: Xiu Jianfeng <xiujianfeng@huawei.com>
Reviewed-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
On failure to allocate the SHA1 tfm, IMA fails to initialize and exits
without freeing the ima_algo_array. Add the missing kfree() for
ima_algo_array to avoid the potential memory leak.
Signed-off-by: Jianglei Nie <niejianglei2021@163.com>
Fixes: 6d94809af6 ("ima: Allocate and initialize tfm for each PCR bank")
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
Currently, an unsigned kernel could be kexec'ed when IMA arch specific
policy is configured unless lockdown is enabled. Enforce kernel
signature verification check in the kexec_file_load syscall when IMA
arch specific policy is configured.
Fixes: 99d5cadfde ("kexec_file: split KEXEC_VERIFY_SIG into KEXEC_SIG and KEXEC_SIG_FORCE")
Reported-and-suggested-by: Mimi Zohar <zohar@linux.ibm.com>
Signed-off-by: Coiby Xu <coxu@redhat.com>
Signed-off-by: Mimi Zohar <zohar@linux.ibm.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: abfb9c0725f2 ("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>
