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=-1.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,UNWANTED_LANGUAGE_BODY, URIBL_BLOCKED autolearn=ham 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 16C70C43218 for ; Sat, 27 Apr 2019 15:22:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DD4A0206A3 for ; Sat, 27 Apr 2019 15:22:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728253AbfD0PWq (ORCPT ); Sat, 27 Apr 2019 11:22:46 -0400 Received: from shadbolt.e.decadent.org.uk ([88.96.1.126]:33736 "EHLO shadbolt.e.decadent.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727530AbfD0PPb (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 1hKP31-0000z6-LB; Sat, 27 Apr 2019 16:15:27 +0100 Received: from ben by deadeye with local (Exim 4.92) (envelope-from ) id 1hKP2l-0004Y8-C9; 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 , "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 3.16 121/202] mn10300: 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 8b166553a9aaf39774bc22f5e93c965584303929 upstream. Use the more generic functions get_signal() signal_setup_done() for signal delivery. 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/mn10300/kernel/signal.c | 89 +++++++++++++++--------------------- 1 file changed, 36 insertions(+), 53 deletions(-) --- a/arch/mn10300/kernel/signal.c +++ b/arch/mn10300/kernel/signal.c @@ -207,16 +207,16 @@ static inline void __user *get_sigframe( /* * set up a normal signal frame */ -static int setup_frame(int sig, struct k_sigaction *ka, sigset_t *set, +static int setup_frame(struct ksignal *ksig, sigset_t *set, struct pt_regs *regs) { struct sigframe __user *frame; - int rsig; + int rsig, sig = ksig->sig; - frame = get_sigframe(ka, regs, sizeof(*frame)); + frame = get_sigframe(&ksig->ka, regs, sizeof(*frame)); if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame))) - goto give_sigsegv; + return -EFAULT; rsig = sig; if (sig < 32 && @@ -226,40 +226,40 @@ static int setup_frame(int sig, struct k if (__put_user(rsig, &frame->sig) < 0 || __put_user(&frame->sc, &frame->psc) < 0) - goto give_sigsegv; + return -EFAULT; if (setup_sigcontext(&frame->sc, &frame->fpuctx, regs, set->sig[0])) - goto give_sigsegv; + return -EFAULT; if (_NSIG_WORDS > 1) { if (__copy_to_user(frame->extramask, &set->sig[1], sizeof(frame->extramask))) - goto give_sigsegv; + return -EFAULT; } /* set up to return from userspace. If provided, use a stub already in * userspace */ - if (ka->sa.sa_flags & SA_RESTORER) { - if (__put_user(ka->sa.sa_restorer, &frame->pretcode)) - goto give_sigsegv; + if (ksig->ka.sa.sa_flags & SA_RESTORER) { + if (__put_user(ksig->ka.sa.sa_restorer, &frame->pretcode)) + return -EFAULT; } else { if (__put_user((void (*)(void))frame->retcode, &frame->pretcode)) - goto give_sigsegv; + return -EFAULT; /* this is mov $,d0; syscall 0 */ if (__put_user(0x2c, (char *)(frame->retcode + 0)) || __put_user(__NR_sigreturn, (char *)(frame->retcode + 1)) || __put_user(0x00, (char *)(frame->retcode + 2)) || __put_user(0xf0, (char *)(frame->retcode + 3)) || __put_user(0xe0, (char *)(frame->retcode + 4))) - goto give_sigsegv; + return -EFAULT; flush_icache_range((unsigned long) frame->retcode, (unsigned long) frame->retcode + 5); } /* set up registers for signal handler */ regs->sp = (unsigned long) frame; - regs->pc = (unsigned long) ka->sa.sa_handler; + regs->pc = (unsigned long) ksig->ka.sa.sa_handler; regs->d0 = sig; regs->d1 = (unsigned long) &frame->sc; @@ -270,25 +270,21 @@ static int setup_frame(int sig, struct k #endif return 0; - -give_sigsegv: - force_sigsegv(sig, current); - return -EFAULT; } /* * set up a realtime signal frame */ -static int setup_rt_frame(int sig, 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; - int rsig; + int rsig, sig = ksig->sig; - frame = get_sigframe(ka, regs, sizeof(*frame)); + frame = get_sigframe(&ksig->ka, regs, sizeof(*frame)); if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame))) - goto give_sigsegv; + return -EFAULT; rsig = sig; if (sig < 32 && @@ -299,8 +295,8 @@ static int setup_rt_frame(int sig, struc if (__put_user(rsig, &frame->sig) || __put_user(&frame->info, &frame->pinfo) || __put_user(&frame->uc, &frame->puc) || - copy_siginfo_to_user(&frame->info, info)) - goto give_sigsegv; + copy_siginfo_to_user(&frame->info, &ksig->info)) + return -EFAULT; /* create the ucontext. */ if (__put_user(0, &frame->uc.uc_flags) || @@ -309,13 +305,14 @@ static int setup_rt_frame(int sig, struc setup_sigcontext(&frame->uc.uc_mcontext, &frame->fpuctx, regs, set->sig[0]) || __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set))) - goto give_sigsegv; + return -EFAULT; /* set up to return from userspace. If provided, use a stub already in * userspace */ - if (ka->sa.sa_flags & SA_RESTORER) { - if (__put_user(ka->sa.sa_restorer, &frame->pretcode)) - goto give_sigsegv; + if (ksig->ka.sa.sa_flags & SA_RESTORER) { + if (__put_user(ksig->ka.sa.sa_restorer, &frame->pretcode)) + return -EFAULT; + } else { if (__put_user((void(*)(void))frame->retcode, &frame->pretcode) || @@ -326,7 +323,7 @@ static int setup_rt_frame(int sig, struc __put_user(0x00, (char *)(frame->retcode + 2)) || __put_user(0xf0, (char *)(frame->retcode + 3)) || __put_user(0xe0, (char *)(frame->retcode + 4))) - goto give_sigsegv; + return -EFAULT; flush_icache_range((u_long) frame->retcode, (u_long) frame->retcode + 5); @@ -334,7 +331,7 @@ static int setup_rt_frame(int sig, struc /* Set up registers for signal handler */ regs->sp = (unsigned long) frame; - regs->pc = (unsigned long) ka->sa.sa_handler; + regs->pc = (unsigned long) ksig->ka.sa.sa_handler; regs->d0 = sig; regs->d1 = (long) &frame->info; @@ -345,10 +342,6 @@ static int setup_rt_frame(int sig, struc #endif return 0; - -give_sigsegv: - force_sigsegv(sig, current); - return -EFAULT; } static inline void stepback(struct pt_regs *regs) @@ -360,9 +353,7 @@ static inline void stepback(struct pt_re /* * handle the actual delivery of a signal to userspace */ -static int handle_signal(int sig, - siginfo_t *info, struct k_sigaction *ka, - struct pt_regs *regs) +static int handle_signal(struct ksignal *ksig, struct pt_regs *regs) { sigset_t *oldset = sigmask_to_save(); int ret; @@ -377,7 +368,7 @@ static int handle_signal(int sig, break; case -ERESTARTSYS: - if (!(ka->sa.sa_flags & SA_RESTART)) { + if (!(ksig->ka.sa.sa_flags & SA_RESTART)) { regs->d0 = -EINTR; break; } @@ -390,15 +381,12 @@ static int handle_signal(int sig, } /* Set up the stack frame */ - if (ka->sa.sa_flags & SA_SIGINFO) - ret = setup_rt_frame(sig, ka, info, oldset, regs); + if (ksig->ka.sa.sa_flags & SA_SIGINFO) + ret = setup_rt_frame(ksig, oldset, regs); else - ret = setup_frame(sig, ka, oldset, regs); - if (ret) - return ret; + ret = setup_frame(ksig, oldset, regs); - signal_delivered(sig, info, ka, regs, - test_thread_flag(TIF_SINGLESTEP)); + signal_setup_done(ret, ksig, test_thread_flag(TIF_SINGLESTEP)); return 0; } @@ -407,15 +395,10 @@ static int handle_signal(int sig, */ static void do_signal(struct pt_regs *regs) { - struct k_sigaction ka; - siginfo_t info; - int signr; - - signr = get_signal_to_deliver(&info, &ka, regs, NULL); - if (signr > 0) { - if (handle_signal(signr, &info, &ka, regs) == 0) { - } + struct ksignal ksig; + if (get_signal(&ksig)) { + handle_signal(&ksig, regs); return; }