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| author | Alexander Popov <alex.popov@linux.com> | 2018-08-17 01:17:04 +0300 |
|---|---|---|
| committer | Kees Cook <keescook@chromium.org> | 2018-09-04 10:35:48 -0700 |
| commit | 6fcde90466738b84a073e4f4d18c50015ee29fb2 (patch) | |
| tree | 5145c3f8f1ae7b6e148957a6f030a4a395fc8e61 | |
| parent | 964c9dff0091893a9a74a88edf984c6da0b779f7 (diff) | |
| download | linux-6fcde90466738b84a073e4f4d18c50015ee29fb2.tar.bz2 | |
arm64: Drop unneeded stackleak_check_alloca()
Drop stackleak_check_alloca() for arm64 since the STACKLEAK gcc plugin now
doesn't track stack depth overflow caused by alloca().
Signed-off-by: Alexander Popov <alex.popov@linux.com>
Tested-by: Laura Abbott <labbott@redhat.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
| -rw-r--r-- | arch/arm64/kernel/process.c | 22 |
1 files changed, 0 insertions, 22 deletions
diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c index 7f1628effe6d..740b31f77ade 100644 --- a/arch/arm64/kernel/process.c +++ b/arch/arm64/kernel/process.c @@ -493,25 +493,3 @@ void arch_setup_new_exec(void) { current->mm->context.flags = is_compat_task() ? MMCF_AARCH32 : 0; } - -#ifdef CONFIG_GCC_PLUGIN_STACKLEAK -void __used stackleak_check_alloca(unsigned long size) -{ - unsigned long stack_left; - unsigned long current_sp = current_stack_pointer; - struct stack_info info; - - BUG_ON(!on_accessible_stack(current, current_sp, &info)); - - stack_left = current_sp - info.low; - - /* - * There's a good chance we're almost out of stack space if this - * is true. Using panic() over BUG() is more likely to give - * reliable debugging output. - */ - if (size >= stack_left) - panic("alloca() over the kernel stack boundary\n"); -} -EXPORT_SYMBOL(stackleak_check_alloca); -#endif |