From c1095c6da518b0b64e724f629051fa67655cd8d9 Mon Sep 17 00:00:00 2001 From: Oleg Nesterov Date: Wed, 27 Jul 2011 12:49:44 -0700 Subject: [PATCH] signals: sys_ssetmask/sys_rt_sigsuspend should use set_current_blocked() sys_ssetmask(), sys_rt_sigsuspend() and compat_sys_rt_sigsuspend() 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(). Another change is that now we are doing ->saved_sigmask = ->blocked lockless, it doesn't make any sense to do this under ->siglock. Signed-off-by: Oleg Nesterov Reviewed-by: Matt Fleming Acked-by: Tejun Heo Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- kernel/compat.c | 5 +---- kernel/signal.c | 17 +++++------------ 2 files changed, 6 insertions(+), 16 deletions(-) diff --git a/kernel/compat.c b/kernel/compat.c index 18197ae2d46..616c78197cc 100644 --- a/kernel/compat.c +++ b/kernel/compat.c @@ -992,11 +992,8 @@ asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset, compat sigset_from_compat(&newset, &newset32); sigdelsetmask(&newset, sigmask(SIGKILL)|sigmask(SIGSTOP)); - spin_lock_irq(¤t->sighand->siglock); current->saved_sigmask = current->blocked; - current->blocked = newset; - recalc_sigpending(); - spin_unlock_irq(¤t->sighand->siglock); + set_current_blocked(&newset); current->state = TASK_INTERRUPTIBLE; schedule(); diff --git a/kernel/signal.c b/kernel/signal.c index d7f70aed1cc..291c9700be7 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -3102,15 +3102,11 @@ SYSCALL_DEFINE0(sgetmask) SYSCALL_DEFINE1(ssetmask, int, newmask) { - int old; + int old = current->blocked.sig[0]; + sigset_t newset; - spin_lock_irq(¤t->sighand->siglock); - old = current->blocked.sig[0]; - - siginitset(¤t->blocked, newmask & ~(sigmask(SIGKILL)| - sigmask(SIGSTOP))); - recalc_sigpending(); - spin_unlock_irq(¤t->sighand->siglock); + siginitset(&newset, newmask & ~(sigmask(SIGKILL) | sigmask(SIGSTOP))); + set_current_blocked(&newset); return old; } @@ -3167,11 +3163,8 @@ SYSCALL_DEFINE2(rt_sigsuspend, sigset_t __user *, unewset, size_t, sigsetsize) return -EFAULT; sigdelsetmask(&newset, sigmask(SIGKILL)|sigmask(SIGSTOP)); - spin_lock_irq(¤t->sighand->siglock); current->saved_sigmask = current->blocked; - current->blocked = newset; - recalc_sigpending(); - spin_unlock_irq(¤t->sighand->siglock); + set_current_blocked(&newset); current->state = TASK_INTERRUPTIBLE; schedule();