[PATCH 1/8] arm64: Enable VMAP_STACK support
From: Breno Leitao <leitao@debian.org>
Date: 2025-07-07 16:01:10
Also in:
linux-efi, lkml
Subsystem:
arm64 port (aarch64 architecture), the rest · Maintainers:
Catalin Marinas, Will Deacon, Linus Torvalds
Enable virtually mapped kernel stacks for ARM64. This provides better stack overflow detection and improved security by mapping kernel stacks in vmalloc space rather than using direct mapping. VMAP_STACK helps catch stack overflows early by placing guard pages around kernel stacks, and also provides better isolation between kernel stacks and other kernel data structures. All dependencies are satisfied for arm64: HAVE_ARCH_VMAP_STACK is already selected above, and KASAN_VMALLOC is selected when KASAN is enabled, meeting the KASAN dependency requirements. Suggested-by: Will Deacon <will@kernel.org> Signed-off-by: Breno Leitao <leitao@debian.org> --- arch/arm64/Kconfig | 1 + 1 file changed, 1 insertion(+)
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 393d71124f5d..179b302f43c2 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig@@ -280,6 +280,7 @@ config ARM64 select HAVE_SOFTIRQ_ON_OWN_STACK select USER_STACKTRACE_SUPPORT select VDSO_GETRANDOM + select VMAP_STACK help ARM 64-bit (AArch64) Linux support.
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2.47.1