From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A55AAC43219 for ; Sat, 27 Apr 2019 15:22:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7F24E206A3 for ; Sat, 27 Apr 2019 15:22:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728158AbfD0PWh (ORCPT ); Sat, 27 Apr 2019 11:22:37 -0400 Received: from shadbolt.e.decadent.org.uk ([88.96.1.126]:33782 "EHLO shadbolt.e.decadent.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727544AbfD0PPb (ORCPT ); Sat, 27 Apr 2019 11:15:31 -0400 Received: from [192.168.4.242] (helo=deadeye) by shadbolt.decadent.org.uk with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1hKP32-0000zO-E0; Sat, 27 Apr 2019 16:15:28 +0100 Received: from ben by deadeye with local (Exim 4.92) (envelope-from ) id 1hKP2l-0004XK-1P; Sat, 27 Apr 2019 16:15:11 +0100 Content-Type: text/plain; charset="UTF-8" Content-Disposition: inline Content-Transfer-Encoding: 8bit MIME-Version: 1.0 From: Ben Hutchings To: linux-kernel@vger.kernel.org, stable@vger.kernel.org CC: akpm@linux-foundation.org, Denis Kirjanov , "Mark Salter" , "Richard Weinberger" Date: Sat, 27 Apr 2019 16:13:09 +0100 Message-ID: X-Mailer: LinuxStableQueue (scripts by bwh) X-Patchwork-Hint: ignore Subject: [PATCH 3.16 111/202] c6x: Use get_signal() signal_setup_done() In-Reply-To: X-SA-Exim-Connect-IP: 192.168.4.242 X-SA-Exim-Mail-From: ben@decadent.org.uk X-SA-Exim-Scanned: No (on shadbolt.decadent.org.uk); SAEximRunCond expanded to false Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.16.66-rc1 review patch. If anyone has any objections, please let me know. ------------------ From: Richard Weinberger commit e19c025bc9a184ed9c5daf06ffb89abc81d1696a upstream. Use the more generic functions get_signal() signal_setup_done() for signal delivery. Tested-by: Mark Salter Acked-by: Mark Salter Signed-off-by: Richard Weinberger [bwh: Backported to 3.16 as dependency of commit 35634ffa1751 "signal: Always notice exiting tasks"] Signed-off-by: Ben Hutchings --- arch/c6x/kernel/signal.c | 43 +++++++++++++++++----------------------- 1 file changed, 18 insertions(+), 25 deletions(-) --- a/arch/c6x/kernel/signal.c +++ b/arch/c6x/kernel/signal.c @@ -146,21 +146,21 @@ static inline void __user *get_sigframe( return (void __user *)((sp - framesize) & ~7); } -static int setup_rt_frame(int signr, struct k_sigaction *ka, siginfo_t *info, - sigset_t *set, struct pt_regs *regs) +static int setup_rt_frame(struct ksignal *ksig, sigset_t *set, + struct pt_regs *regs) { struct rt_sigframe __user *frame; unsigned long __user *retcode; int err = 0; - frame = get_sigframe(ka, regs, sizeof(*frame)); + frame = get_sigframe(&ksig->ka, regs, sizeof(*frame)); if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame))) - goto segv_and_exit; + return -EFAULT; err |= __put_user(&frame->info, &frame->pinfo); err |= __put_user(&frame->uc, &frame->puc); - err |= copy_siginfo_to_user(&frame->info, info); + err |= copy_siginfo_to_user(&frame->info, &ksig->info); /* Clear all the bits of the ucontext we don't use. */ err |= __clear_user(&frame->uc, offsetof(struct ucontext, uc_mcontext)); @@ -188,7 +188,7 @@ static int setup_rt_frame(int signr, str #undef COPY if (err) - goto segv_and_exit; + return -EFAULT; flush_icache_range((unsigned long) &frame->retcode, (unsigned long) &frame->retcode + RETCODE_SIZE); @@ -198,10 +198,10 @@ static int setup_rt_frame(int signr, str /* Change user context to branch to signal handler */ regs->sp = (unsigned long) frame - 8; regs->b3 = (unsigned long) retcode; - regs->pc = (unsigned long) ka->sa.sa_handler; + regs->pc = (unsigned long) ksig->ka.sa.sa_handler; /* Give the signal number to the handler */ - regs->a4 = signr; + regs->a4 = ksig->sig; /* * For realtime signals we must also set the second and third @@ -212,10 +212,6 @@ static int setup_rt_frame(int signr, str regs->a6 = (unsigned long)&frame->uc; return 0; - -segv_and_exit: - force_sigsegv(signr, current); - return -EFAULT; } static inline void @@ -245,10 +241,11 @@ do_restart: /* * handle the actual delivery of a signal to userspace */ -static void handle_signal(int sig, - siginfo_t *info, struct k_sigaction *ka, - struct pt_regs *regs, int syscall) +static void handle_signal(struct ksignal *ksig, struct pt_regs *regs, + int syscall) { + int ret; + /* Are we from a system call? */ if (syscall) { /* If so, check system call restarting.. */ @@ -259,7 +256,7 @@ static void handle_signal(int sig, break; case -ERESTARTSYS: - if (!(ka->sa.sa_flags & SA_RESTART)) { + if (!(ksig->ka.sa.sa_flags & SA_RESTART)) { regs->a4 = -EINTR; break; } @@ -272,9 +269,8 @@ static void handle_signal(int sig, } /* Set up the stack frame */ - if (setup_rt_frame(sig, ka, info, sigmask_to_save(), regs) < 0) - return; - signal_delivered(sig, info, ka, regs, 0); + ret = setup_rt_frame(ksig, sigmask_to_save(), regs); + signal_setup_done(ret, ksig, 0); } /* @@ -282,18 +278,15 @@ static void handle_signal(int sig, */ static void do_signal(struct pt_regs *regs, int syscall) { - struct k_sigaction ka; - siginfo_t info; - int signr; + struct ksignal ksig; /* we want the common case to go fast, which is why we may in certain * cases get here from kernel mode */ if (!user_mode(regs)) return; - signr = get_signal_to_deliver(&info, &ka, regs, NULL); - if (signr > 0) { - handle_signal(signr, &info, &ka, regs, syscall); + if (get_signal(&ksig)) { + handle_signal(&ksig, regs, syscall); return; }