MIPS: kernel: scalls: Skip the syscall if denied by the seccomp filter
Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Reviewed-by: Paul Burton <paul.burton@imgtec.com>
Reviewed-by: James Hogan <james.hogan@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/6399/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/kernel/scall64-o32.S b/arch/mips/kernel/scall64-o32.S
index 6788727d..67dc022 100644
--- a/arch/mips/kernel/scall64-o32.S
+++ b/arch/mips/kernel/scall64-o32.S
@@ -114,6 +114,8 @@
move a0, sp
jal syscall_trace_enter
+ bltz v0, 2f # seccomp failed? Skip syscall
+
move t0, s0
RESTORE_STATIC
ld a0, PT_R4(sp) # Restore argument registers
@@ -136,7 +138,7 @@
sd t1, PT_R0(sp) # save it for syscall restarting
1: sd v0, PT_R2(sp) # result
- j syscall_exit
+2: j syscall_exit
/* ------------------------------------------------------------------------ */
