signal: sys_sigprocmask() needs retarget_shared_pending()

sys_sigprocmask() changes current->blocked by hand. Convert this code
to use set_current_blocked().

Signed-off-by: Oleg Nesterov <oleg@redhat.com>

1 files changed, 9 insertions, 13 deletions

diff --git a/kernel/signal.c b/kernel/signal.c
index c0af959b8530..b87780ef7d28 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -2900,7 +2900,7 @@ SYSCALL_DEFINE3(sigprocmask, int, how, old_sigset_t __user *, nset,
                 old_sigset_t __user *, oset)
 {
         old_sigset_t old_set, new_set;
-        int error;
+        sigset_t new_blocked;
 
         old_set = current->blocked.sig[0];
 
@@ -2909,27 +2909,23 @@ SYSCALL_DEFINE3(sigprocmask, int, how, old_sigset_t __user *, nset,
                         return -EFAULT;
                 new_set &= ~(sigmask(SIGKILL) | sigmask(SIGSTOP));
 
-                error = 0;
-                spin_lock_irq(&current->sighand->siglock);
+                new_blocked = current->blocked;
+
                 switch (how) {
-                default:
-                        error = -EINVAL;
-                        break;
                 case SIG_BLOCK:
-                        sigaddsetmask(&current->blocked, new_set);
+                        sigaddsetmask(&new_blocked, new_set);
                         break;
                 case SIG_UNBLOCK:
-                        sigdelsetmask(&current->blocked, new_set);
+                        sigdelsetmask(&new_blocked, new_set);
                         break;
                 case SIG_SETMASK:
-                        current->blocked.sig[0] = new_set;
+                        new_blocked.sig[0] = new_set;
                         break;
+                default:
+                        return -EINVAL;
                 }
 
-                recalc_sigpending();
-                spin_unlock_irq(&current->sighand->siglock);
-                if (error)
-                        return error;
+                set_current_blocked(&new_blocked);
         }
 
         if (oset) {