[PATCH 3.16 070/158] MIPS: syscall: Fix AUDIT value for O32 processes on MIPS64

[Greg Kroah-Hartman]

3.16-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Markos Chandras <markos.chandras@xxxxxxxxxx>

commit 40381529f84c4cda3bd2d20cab6a707508856b21 upstream.

On MIPS64, O32 processes set both TIF_32BIT_ADDR and
TIF_32BIT_REGS so the previous condition treated O32 applications
as N32 when evaluating seccomp filters. Fix the condition to check
both TIF_32BIT_{REGS, ADDR} for the N32 AUDIT flag.

Signed-off-by: Markos Chandras <markos.chandras@xxxxxxxxxx>
Patchwork: http://patchwork.linux-mips.org/patch/7480/
Signed-off-by: James Hogan <james.hogan@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 arch/mips/include/asm/syscall.h |    8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

--- a/arch/mips/include/asm/syscall.h
+++ b/arch/mips/include/asm/syscall.h
@@ -131,10 +131,12 @@ static inline int syscall_get_arch(void)
 {
 	int arch = EM_MIPS;
 #ifdef CONFIG_64BIT
-	if (!test_thread_flag(TIF_32BIT_REGS))
+	if (!test_thread_flag(TIF_32BIT_REGS)) {
 		arch |= __AUDIT_ARCH_64BIT;
-	if (test_thread_flag(TIF_32BIT_ADDR))
-		arch |= __AUDIT_ARCH_CONVENTION_MIPS64_N32;
+		/* N32 sets only TIF_32BIT_ADDR */
+		if (test_thread_flag(TIF_32BIT_ADDR))
+			arch |= __AUDIT_ARCH_CONVENTION_MIPS64_N32;
+	}
 #endif
 #if defined(__LITTLE_ENDIAN)
 	arch |=  __AUDIT_ARCH_LE;


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