linux-kernel - [tip:x86/signal] x86, signals: Convert the IA32_EMULATION code to use set_current

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:	Fri, 15 Jul 2011 05:46:28 GMT
From:	tip-bot for Oleg Nesterov <oleg@...hat.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com,
	oleg@...hat.com, tglx@...utronix.de, hpa@...ux.intel.com
Subject: [tip:x86/signal] x86, signals: Convert the IA32_EMULATION code to use set_current_blocked()

Commit-ID:  905f29e2aa004560907199cc96248fa11bafea8a
Gitweb:     http://git.kernel.org/tip/905f29e2aa004560907199cc96248fa11bafea8a
Author:     Oleg Nesterov <oleg@...hat.com>
AuthorDate: Sun, 10 Jul 2011 21:27:24 +0200
Committer:  H. Peter Anvin <hpa@...ux.intel.com>
CommitDate: Thu, 14 Jul 2011 21:21:31 -0700

x86, signals: Convert the IA32_EMULATION code to use set_current_blocked()

sys32_sigsuspend() and sys32_*sigreturn() change ->blocked directly.
This is not correct, see the changelog in e6fa16ab
"signal: sigprocmask() should do retarget_shared_pending()"

Change them to use set_current_blocked().

Signed-off-by: Oleg Nesterov <oleg@...hat.com>
Link: http://lkml.kernel.org/r/20110710192724.GA31755@redhat.com
Signed-off-by: H. Peter Anvin <hpa@...ux.intel.com>
---
 arch/x86/ia32/ia32_signal.c |   22 +++++++++-------------
 1 files changed, 9 insertions(+), 13 deletions(-)

diff --git a/arch/x86/ia32/ia32_signal.c b/arch/x86/ia32/ia32_signal.c
index 588a7aa..6557769 100644
--- a/arch/x86/ia32/ia32_signal.c
+++ b/arch/x86/ia32/ia32_signal.c
@@ -127,15 +127,17 @@ int copy_siginfo_from_user32(siginfo_t *to, compat_siginfo_t __user *from)
 
 asmlinkage long sys32_sigsuspend(int history0, int history1, old_sigset_t mask)
 {
-	mask &= _BLOCKABLE;
-	spin_lock_irq(&current->sighand->siglock);
+	sigset_t blocked;
+
 	current->saved_sigmask = current->blocked;
-	siginitset(&current->blocked, mask);
-	recalc_sigpending();
-	spin_unlock_irq(&current->sighand->siglock);
+
+	mask &= _BLOCKABLE;
+	siginitset(&blocked, mask);
+	set_current_blocked(&blocked);
 
 	current->state = TASK_INTERRUPTIBLE;
 	schedule();
+
 	set_restore_sigmask();
 	return -ERESTARTNOHAND;
 }
@@ -279,10 +281,7 @@ asmlinkage long sys32_sigreturn(struct pt_regs *regs)
 		goto badframe;
 
 	sigdelsetmask(&set, ~_BLOCKABLE);
-	spin_lock_irq(&current->sighand->siglock);
-	current->blocked = set;
-	recalc_sigpending();
-	spin_unlock_irq(&current->sighand->siglock);
+	set_current_blocked(&set);
 
 	if (ia32_restore_sigcontext(regs, &frame->sc, &ax))
 		goto badframe;
@@ -308,10 +307,7 @@ asmlinkage long sys32_rt_sigreturn(struct pt_regs *regs)
 		goto badframe;
 
 	sigdelsetmask(&set, ~_BLOCKABLE);
-	spin_lock_irq(&current->sighand->siglock);
-	current->blocked = set;
-	recalc_sigpending();
-	spin_unlock_irq(&current->sighand->siglock);
+	set_current_blocked(&set);
 
 	if (ia32_restore_sigcontext(regs, &frame->uc.uc_mcontext, &ax))
 		goto badframe;
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/