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| author | Amit Daniel Kachhap <amit.kachhap@arm.com> | 2020-10-02 17:26:30 +0530 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2020-10-05 18:52:17 +0100 |
| commit | 4dafc08d0ba4768e8540f49ab40c3ea26e40d554 (patch) | |
| tree | abd3c2e5031537bd67107a13d31e129546a39fab /kernel/umh.c | |
| parent | f981d8fa26469e19d2ce73006685ae88205e914a (diff) | |
kselftest/arm64: Check mte tagged user address in kernel
Add a testcase to check that user address with valid/invalid
mte tag works in kernel mode. This test verifies that the kernel
API's __arch_copy_from_user/__arch_copy_to_user works by considering
if the user pointer has valid/invalid allocation tags.
In MTE sync mode, file memory read/write and other similar interfaces
fails if a user memory with invalid tag is accessed in kernel. In async
mode no such failure occurs.
Signed-off-by: Amit Daniel Kachhap <amit.kachhap@arm.com>
Tested-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20201002115630.24683-7-amit.kachhap@arm.com
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'kernel/umh.c')
0 files changed, 0 insertions, 0 deletions