@@ -50,6 +50,7 @@ config ARM
select HAVE_ARCH_KGDB if !CPU_ENDIAN_BE32 && MMU
select HAVE_ARCH_MMAP_RND_BITS if MMU
select HAVE_ARCH_SECCOMP_FILTER if (AEABI && !OABI_COMPAT)
+ select HAVE_ARCH_THREAD_STRUCT_WHITELIST
select HAVE_ARCH_TRACEHOOK
select HAVE_ARM_SMCCC if CPU_V7
select HAVE_EBPF_JIT if !CPU_ENDIAN_BE32
@@ -45,6 +45,13 @@ struct thread_struct {
struct debug_info debug;
};
+/* Nothing needs to be usercopy-whitelisted from thread_struct. */
+static inline void arch_thread_struct_whitelist(unsigned long *offset,
+ unsigned long *size)
+{
+ *offset = *size = 0;
+}
+
#define INIT_THREAD { }
#define start_thread(regs,pc,sp) \
ARM does not carry FPU state in the thread structure, so it can declare no usercopy whitelist at all. Cc: Russell King <linux@armlinux.org.uk> Cc: Ingo Molnar <mingo@kernel.org> Cc: Christian Borntraeger <borntraeger@de.ibm.com> Cc: "Peter Zijlstra (Intel)" <peterz@infradead.org> Cc: linux-arm-kernel@lists.infradead.org Signed-off-by: Kees Cook <keescook@chromium.org> --- arch/arm/Kconfig | 1 + arch/arm/include/asm/processor.h | 7 +++++++ 2 files changed, 8 insertions(+)