[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 <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
mrcsosa · Jun 24, 2005 · 7286aa9 · 7286aa9
1 parent 16822e6
commit 7286aa9
Showing 1 changed file with 2 additions and 2 deletions.
diff --git 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,