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Date: Thu, 22 Mar 2018 10:44:11 +0900 From: NIIBE Yutaka <gniibe@...j.org> To: linux-kernel@...r.kernel.org Cc: NIIBE Yutaka <gniibe@...j.org> Subject: [PATCH v2 2/4] signal/x86: do_signal: syscall restart should be done only once. do_signal may be called multiple times from exit_to_usermode_loop. In those multiple calls, only the one should handle restarting the system call. When actually delivering a signal, make sure the register will not be examined again as syscall errno by another call of do_signal. Signed-off-by: NIIBE Yutaka <gniibe@...j.org> --- arch/x86/kernel/signal.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/x86/kernel/signal.c b/arch/x86/kernel/signal.c index cdfb82031243..e709b54a01b8 100644 --- a/arch/x86/kernel/signal.c +++ b/arch/x86/kernel/signal.c @@ -729,6 +729,7 @@ handle_signal(struct ksignal *ksig, struct pt_regs *regs) regs->ip -= 2; break; } + regs->orig_ax = -1; } /* -- 2.11.0
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