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authorLinus Torvalds <torvalds@linux-foundation.org>2022-03-21 19:32:04 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2022-03-21 19:32:04 -0700
commit2142b7f0c6bbe1f9515ce3383de9f7a32a5a025b (patch)
treee1c28d1fc2cf8a905254b6f4475a4e65dfddce82 /arch/m68k
parentfd2d7a4a354539dc141f702c6c277bf3380e8778 (diff)
parentafcf5441b9ff22ac57244cd45ff102ebc2e32d1a (diff)
Merge tag 'hardening-v5.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
Pull kernel hardening updates from Kees Cook: - Add arm64 Shadow Call Stack support for GCC 12 (Dan Li) - Avoid memset with stack offset randomization under Clang (Marco Elver) - Clean up stackleak plugin to play nice with .noinstr (Kees Cook) - Check stack depth for greater usercopy hardening coverage (Kees Cook) * tag 'hardening-v5.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: arm64: Add gcc Shadow Call Stack support m68k: Implement "current_stack_pointer" xtensa: Implement "current_stack_pointer" usercopy: Check valid lifetime via stack depth stack: Constrain and fix stack offset randomization with Clang builds stack: Introduce CONFIG_RANDOMIZE_KSTACK_OFFSET gcc-plugins/stackleak: Ignore .noinstr.text and .entry.text gcc-plugins/stackleak: Exactly match strings instead of prefixes gcc-plugins/stackleak: Provide verbose mode
Diffstat (limited to 'arch/m68k')
-rw-r--r--arch/m68k/Kconfig1
-rw-r--r--arch/m68k/include/asm/current.h4
2 files changed, 4 insertions, 1 deletions
diff --git a/arch/m68k/Kconfig b/arch/m68k/Kconfig
index 268b3860d40d..936cce42ae9a 100644
--- a/arch/m68k/Kconfig
+++ b/arch/m68k/Kconfig
@@ -4,6 +4,7 @@ config M68K
default y
select ARCH_32BIT_OFF_T
select ARCH_HAS_BINFMT_FLAT
+ select ARCH_HAS_CURRENT_STACK_POINTER
select ARCH_HAS_DMA_PREP_COHERENT if HAS_DMA && MMU && !COLDFIRE
select ARCH_HAS_SYNC_DMA_FOR_DEVICE if HAS_DMA
select ARCH_HAVE_NMI_SAFE_CMPXCHG if RMW_INSNS
diff --git a/arch/m68k/include/asm/current.h b/arch/m68k/include/asm/current.h
index 6390ef2f7f86..c117907e1276 100644
--- a/arch/m68k/include/asm/current.h
+++ b/arch/m68k/include/asm/current.h
@@ -24,6 +24,8 @@ static inline struct task_struct *get_current(void)
#define current get_current()
-#endif /* CONFNIG_MMU */
+#endif /* CONFIG_MMU */
+
+register unsigned long current_stack_pointer __asm__("sp");
#endif /* !(_M68K_CURRENT_H) */