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| author | Mark Rutland <mark.rutland@arm.com> | 2022-04-27 18:31:28 +0100 |
|---|---|---|
| committer | Kees Cook <keescook@chromium.org> | 2022-05-08 01:33:09 -0700 |
| commit | 88959a39a1708fc755a89923d60e50de74847bc9 (patch) | |
| tree | ff12c75e5f7355dc5da65f78d23b7396734d5248 /arch | |
| parent | 8111e67dee9ff774712cff8e34fba465c8361960 (diff) | |
| download | linux-88959a39a1708fc755a89923d60e50de74847bc9.tar.gz | |
arm64: entry: use stackleak_erase_on_task_stack()
On arm64 we always call stackleak_erase() on a task stack, and never
call it on another stack. We can avoid some redundant work by using
stackleak_erase_on_task_stack(), telling the stackleak code that it's
being called on a task stack.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Alexander Popov <alex.popov@linux.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Will Deacon <will@kernel.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20220427173128.2603085-14-mark.rutland@arm.com
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm64/kernel/entry.S | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm64/kernel/entry.S b/arch/arm64/kernel/entry.S index ede028dee81b..5b82b9292400 100644 --- a/arch/arm64/kernel/entry.S +++ b/arch/arm64/kernel/entry.S @@ -596,7 +596,7 @@ SYM_CODE_START_LOCAL(ret_to_user) ldr x19, [tsk, #TSK_TI_FLAGS] // re-check for single-step enable_step_tsk x19, x2 #ifdef CONFIG_GCC_PLUGIN_STACKLEAK - bl stackleak_erase + bl stackleak_erase_on_task_stack #endif kernel_exit 0 SYM_CODE_END(ret_to_user) |