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Replace the use of strcpy() in build_aa_ext_struct() in
policy_unpack_test.c with strscpy().
strscpy() is the safer method to use to ensure the buffer does not
overflow. This was found by kernel test robot:
https://lore.kernel.org/all/202301040348.NbfVsXO0-lkp@intel.com/.
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Rae Moar <rmoar@google.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/jj/linux-apparmor
Pull apparmor updates from John Johansen:
"Features:
- switch to zstd compression for profile raw data
Cleanups:
- simplify obtaining the newest label on a cred
- remove useless static inline functions
- compute permission conversion on policy unpack
- refactor code to share common permissins
- refactor unpack to group policy backwards compatiblity code
- add __init annotation to aa_{setup/teardown}_dfa_engine()
Bug Fixes:
- fix a memleak in
- multi_transaction_new()
- free_ruleset()
- unpack_profile()
- alloc_ns()
- fix lockdep warning when removing a namespace
- fix regression in stacking due to label flags
- fix loading of child before parent
- fix kernel-doc comments that differ from fns
- fix spelling errors in comments
- store return value of unpack_perms_table() to signed variable"
* tag 'apparmor-pr-2022-12-14' of git://git.kernel.org/pub/scm/linux/kernel/git/jj/linux-apparmor: (64 commits)
apparmor: Fix uninitialized symbol 'array_size' in policy_unpack_test.c
apparmor: Add __init annotation to aa_{setup/teardown}_dfa_engine()
apparmor: Fix memleak in alloc_ns()
apparmor: Fix memleak issue in unpack_profile()
apparmor: fix a memleak in free_ruleset()
apparmor: Fix spelling of function name in comment block
apparmor: Use pointer to struct aa_label for lbs_cred
AppArmor: Fix kernel-doc
LSM: Fix kernel-doc
AppArmor: Fix kernel-doc
apparmor: Fix loading of child before parent
apparmor: refactor code that alloc null profiles
apparmor: fix obsoleted comments for aa_getprocattr() and audit_resource()
apparmor: remove useless static inline functions
apparmor: Fix unpack_profile() warn: passing zero to 'ERR_PTR'
apparmor: fix uninitialize table variable in error in unpack_trans_table
apparmor: store return value of unpack_perms_table() to signed variable
apparmor: Fix kunit test for out of bounds array
apparmor: Fix decompression of rawdata for read back to userspace
apparmor: Fix undefined references to zstd_ symbols
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Use macros, VISIBLE_IF_KUNIT and EXPORT_SYMBOL_IF_KUNIT, to allow
static symbols to be conditionally set to be visible during
apparmor_policy_unpack_test, which removes the need to include the testing
file in the implementation file.
Change the namespace of the symbols that are now conditionally visible (by
adding the prefix aa_) to avoid confusion with symbols of the same name.
Allow the test to be built as a module and namespace the module name from
policy_unpack_test to apparmor_policy_unpack_test to improve clarity of
the module name.
Provide an example of how static symbols can be dealt with in testing.
Signed-off-by: Rae Moar <rmoar@google.com>
Reviewed-by: David Gow <davidgow@google.com>
Acked-by: John Johansen <john.johansen@canonical.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
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Make sure array_size is initialized in the kunit test to get rid of
compiler warnings. This will also make sure the following tests fail
consistently if the first test fails.
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
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The apparmor kunit tests are failing on the out of bounds array check
with the following failure
# policy_unpack_test_unpack_array_out_of_bounds: EXPECTATION FAILED at security/apparmor/policy_unpack_test.c:178
Expected unpack_array(puf->e, name, &array_size) == 1, but
unpack_array(puf->e, name, &array_size) == -1
# policy_unpack_test_unpack_array_out_of_bounds: EXPECTATION FAILED at security/apparmor/policy_unpack_test.c:180
Expected array_size == 0, but
array_size == 64192
not ok 5 - policy_unpack_test_unpack_array_out_of_bounds
This is because unpack_array changed to allow distinguishing between
the array not being present and an error. In the error case the array
size is not set and should not be tested.
Reported-by: kernel test robot <yujie.liu@intel.com>
Fixes: 995a5b64620e ("apparmor: make unpack_array return a trianary value")
Signed-off-by: John Johansen <john.johansen@canonical.com>
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currently unpack_array() does not return an error nor whether the
array is not present. The ability to detect an error or the array
not being present is needed so rework the unpack_array() to return
the needed information.
Signed-off-by: John Johansen <john.johansen@canonical.com>
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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>
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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>
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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>
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Add KUnit tests to test AppArmor unpacking of userspace policies.
AppArmor uses a serialized binary format for loading policies. To find
policy format documentation see
Documentation/admin-guide/LSM/apparmor.rst.
In order to write the tests against the policy unpacking code, some
static functions needed to be exposed for testing purposes. One of the
goals of this patch is to establish a pattern for which testing these
kinds of functions should be done in the future.
Signed-off-by: Brendan Higgins <brendanhiggins@google.com>
Signed-off-by: Mike Salvatore <mike.salvatore@canonical.com>
Acked-by: John Johansen <john.johansen@canonical.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
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