From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753096Ab0IXFYD (ORCPT ); Fri, 24 Sep 2010 01:24:03 -0400 Received: from zeniv.linux.org.uk ([195.92.253.2]:41085 "EHLO ZenIV.linux.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751185Ab0IXFYB (ORCPT ); Fri, 24 Sep 2010 01:24:01 -0400 Date: Fri, 24 Sep 2010 06:23:57 +0100 From: Al Viro To: Linus Torvalds Cc: Hirokazu Takata , linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org Subject: [PATCH 3/5] m32r: don't block signals if sigframe setup has failed Message-ID: <20100924052357.GN19804@ZenIV.linux.org.uk> References: <20100924052035.GL19804@ZenIV.linux.org.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20100924052035.GL19804@ZenIV.linux.org.uk> User-Agent: Mutt/1.5.20 (2009-08-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Signed-off-by: Al Viro --- arch/m32r/kernel/signal.c | 23 +++++++++++++---------- 1 files changed, 13 insertions(+), 10 deletions(-) diff --git a/arch/m32r/kernel/signal.c b/arch/m32r/kernel/signal.c index db15226..a56fcbd 100644 --- a/arch/m32r/kernel/signal.c +++ b/arch/m32r/kernel/signal.c @@ -187,7 +187,7 @@ get_sigframe(struct k_sigaction *ka, unsigned long sp, size_t frame_size) return (void __user *)((sp - frame_size) & -8ul); } -static void setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info, +static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info, sigset_t *set, struct pt_regs *regs) { struct rt_sigframe __user *frame; @@ -244,17 +244,18 @@ static void setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info, current->comm, current->pid, frame, regs->pc); #endif - return; + return 0; give_sigsegv: force_sigsegv(sig, current); + return -EFAULT; } /* * OK, we're invoking a handler */ -static void +static int handle_signal(unsigned long sig, struct k_sigaction *ka, siginfo_t *info, sigset_t *oldset, struct pt_regs *regs) { @@ -287,7 +288,8 @@ handle_signal(unsigned long sig, struct k_sigaction *ka, siginfo_t *info, } /* Set up the stack frame */ - setup_rt_frame(sig, ka, info, oldset, regs); + if (setup_rt_frame(sig, ka, info, oldset, regs)) + return -EFAULT; spin_lock_irq(¤t->sighand->siglock); sigorsets(¤t->blocked,¤t->blocked,&ka->sa.sa_mask); @@ -295,6 +297,7 @@ handle_signal(unsigned long sig, struct k_sigaction *ka, siginfo_t *info, sigaddset(¤t->blocked,sig); recalc_sigpending(); spin_unlock_irq(¤t->sighand->siglock); + return 0; } /* @@ -302,7 +305,7 @@ handle_signal(unsigned long sig, struct k_sigaction *ka, siginfo_t *info, * want to handle. Thus you cannot kill init even with a SIGKILL even by * mistake. */ -static int do_signal(struct pt_regs *regs) +static void do_signal(struct pt_regs *regs) { siginfo_t info; int signr; @@ -317,7 +320,7 @@ static int do_signal(struct pt_regs *regs) * if so. */ if (!user_mode(regs)) - return 1; + return; if (try_to_freeze()) goto no_signal; @@ -336,9 +339,10 @@ static int do_signal(struct pt_regs *regs) */ /* Whee! Actually deliver the signal. */ - handle_signal(signr, &ka, &info, oldset, regs); - clear_thread_flag(TIF_RESTORE_SIGMASK); - return 1; + if (handle_signal(signr, &ka, &info, oldset, regs) == 0) + clear_thread_flag(TIF_RESTORE_SIGMASK); + + return; } no_signal: @@ -370,7 +374,6 @@ static int do_signal(struct pt_regs *regs) clear_thread_flag(TIF_RESTORE_SIGMASK); sigprocmask(SIG_SETMASK, ¤t->saved_sigmask, NULL); } - return 0; } /* -- 1.5.6.5