[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>
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@ -305,6 +305,8 @@ static void do_syscall_trace(void)
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void do_syscall_trace_enter(struct pt_regs *regs)
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{
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secure_computing(regs->gpr[0]);
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if (test_thread_flag(TIF_SYSCALL_TRACE)
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&& (current->ptrace & PT_PTRACED))
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do_syscall_trace();
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@ -320,8 +322,6 @@ void do_syscall_trace_enter(struct pt_regs *regs)
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void do_syscall_trace_leave(struct pt_regs *regs)
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{
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secure_computing(regs->gpr[0]);
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if (unlikely(current->audit_context))
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audit_syscall_exit(current,
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(regs->ccr&0x1000)?AUDITSC_FAILURE:AUDITSC_SUCCESS,
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