Commit 7286aa9b authored Jun 23, 2005 by Andrea Arcangeli Committed by Linus Torvalds Jun 24, 2005

[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 <andrea@cpushare.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

parent 16822e62

arch/ppc64/kernel/ptrace.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -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,