From: Andrea Arcangeli Date: Fri, 24 Jun 2005 05:00:45 +0000 (-0700) Subject: [PATCH] ppc64: fix seccomp with 32-bit userland X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=7286aa9b9ab35f20b1ff16d867f4535701df99b5;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git [PATCH] ppc64: fix seccomp with 32-bit userland The seccomp check has to happen when entering the syscall and not when exiting it or regs->gpr[0] contains garabge during signal handling in ppc64_rt_sigreturn (this actually might be a bug too, but an orthogonal one, since we really have to run the check before invoking the syscall and not after it). Signed-off-by: Andrea Arcangeli Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/arch/ppc64/kernel/ptrace.c b/arch/ppc64/kernel/ptrace.c index 9f8c6087ae56..2993f108d96d 100644 --- a/arch/ppc64/kernel/ptrace.c +++ b/arch/ppc64/kernel/ptrace.c @@ -305,6 +305,8 @@ static void do_syscall_trace(void) void do_syscall_trace_enter(struct pt_regs *regs) { + secure_computing(regs->gpr[0]); + if (test_thread_flag(TIF_SYSCALL_TRACE) && (current->ptrace & PT_PTRACED)) do_syscall_trace(); @@ -320,8 +322,6 @@ void do_syscall_trace_enter(struct pt_regs *regs) void do_syscall_trace_leave(struct pt_regs *regs) { - secure_computing(regs->gpr[0]); - if (unlikely(current->audit_context)) audit_syscall_exit(current, (regs->ccr&0x1000)?AUDITSC_FAILURE:AUDITSC_SUCCESS,