powerpc: add little endian flag to syscall_get_arch()

Since both ppc and ppc64 have LE variants which are now reported by uname, add
that flag (__AUDIT_ARCH_LE) to syscall_get_arch() and add AUDIT_ARCH_PPC64LE
variant.

Without this,  perf trace and auditctl fail.

Mainline kernel reports ppc64le (per a058801) but there is no matching
AUDIT_ARCH_PPC64LE.

Since 32-bit PPC LE is not supported by audit, don't advertise it in
AUDIT_ARCH_PPC* variants.

See:
	https://www.redhat.com/archives/linux-audit/2014-August/msg00082.html
	https://www.redhat.com/archives/linux-audit/2014-December/msg00004.html

Signed-off-by: Richard Guy Briggs <rgb@redhat.com>
Acked-by: Paul Moore <paul@paul-moore.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

diff --git a/arch/powerpc/include/asm/syscall.h b/arch/powerpc/include/asm/syscall.h
index 6240698fee9a60fbbbf5403c10f710a5c41b861b..ff21b7a2f0cc581686a758bd38adf0bac0fdf24b 100644 (file)
--- a/arch/powerpc/include/asm/syscall.h
+++ b/arch/powerpc/include/asm/syscall.h
@@ -90,6 +90,10 @@ static inline void syscall_set_arguments(struct task_struct *task,
 
 static inline int syscall_get_arch(void)
 {
-       return is_32bit_task() ? AUDIT_ARCH_PPC : AUDIT_ARCH_PPC64;
+       int arch = is_32bit_task() ? AUDIT_ARCH_PPC : AUDIT_ARCH_PPC64;
+#ifdef __LITTLE_ENDIAN__
+       arch |= __AUDIT_ARCH_LE;
+#endif
+       return arch;
 }
 #endif /* _ASM_SYSCALL_H */

diff --git a/include/uapi/linux/audit.h b/include/uapi/linux/audit.h
index d4dbef14d4dffa7d4eae071c59674e5a99b66091..584bb0113e2504801caa3995eecd5b4d20d2f95f 100644 (file)
--- a/include/uapi/linux/audit.h
+++ b/include/uapi/linux/audit.h
@@ -365,7 +365,9 @@ enum {
 #define AUDIT_ARCH_PARISC      (EM_PARISC)
 #define AUDIT_ARCH_PARISC64    (EM_PARISC|__AUDIT_ARCH_64BIT)
 #define AUDIT_ARCH_PPC         (EM_PPC)
+/* do not define AUDIT_ARCH_PPCLE since it is not supported by audit */
 #define AUDIT_ARCH_PPC64       (EM_PPC64|__AUDIT_ARCH_64BIT)
+#define AUDIT_ARCH_PPC64LE     (EM_PPC64|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
 #define AUDIT_ARCH_S390                (EM_S390)
 #define AUDIT_ARCH_S390X       (EM_S390|__AUDIT_ARCH_64BIT)
 #define AUDIT_ARCH_SH          (EM_SH)