lkml.org 
[lkml]   [2011]   [Aug]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 05/41] blackfin: Use set_current_blocked()
Date
From: Matt Fleming <matt.fleming@linux.intel.com>

As described in e6fa16ab ("signal: sigprocmask() should do
retarget_shared_pending()") the modification of current->blocked is
incorrect as we need to check whether the signal we're about to block
is pending in the shared queue.

Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Matt Fleming <matt.fleming@linux.intel.com>
---
arch/blackfin/kernel/signal.c | 16 ++++++----------
1 files changed, 6 insertions(+), 10 deletions(-)

diff --git a/arch/blackfin/kernel/signal.c b/arch/blackfin/kernel/signal.c
index d536f35..96b8666 100644
--- a/arch/blackfin/kernel/signal.c
+++ b/arch/blackfin/kernel/signal.c
@@ -99,10 +99,7 @@ asmlinkage int do_rt_sigreturn(unsigned long __unused)
goto badframe;

sigdelsetmask(&set, ~_BLOCKABLE);
- spin_lock_irq(&current->sighand->siglock);
- current->blocked = set;
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
+ set_current_block(&set);

if (rt_restore_sigcontext(regs, &frame->uc.uc_mcontext, &r0))
goto badframe;
@@ -267,13 +264,12 @@ handle_signal(int sig, siginfo_t *info, struct k_sigaction *ka,
ret = setup_rt_frame(sig, ka, info, oldset, regs);

if (ret == 0) {
- spin_lock_irq(&current->sighand->siglock);
- sigorsets(&current->blocked, &current->blocked,
- &ka->sa.sa_mask);
+ sigset_t blocked;
+
+ sigorsets(&blocked, &current->blocked, &ka->sa.sa_mask);
if (!(ka->sa.sa_flags & SA_NODEFER))
- sigaddset(&current->blocked, sig);
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
+ sigaddset(&blocked, sig);
+ set_current_blocked(&blocked);
}
return ret;
}
--
1.7.4.4


\
 
 \ /
  Last update: 2011-08-11 15:59    [W:0.294 / U:3.480 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site