Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland...

[cascardo/linux.git] / fs / signalfd.c

diff --git a/fs/signalfd.c b/fs/signalfd.c
index 7b941ab..a8e293d 100644 (file)
--- a/fs/signalfd.c
+++ b/fs/signalfd.c
@@ -56,12 +56,18 @@ static int signalfd_lock(struct signalfd_ctx *ctx, struct signalfd_lockctx *lk)
                sighand = lock_task_sighand(lk->tsk, &lk->flags);
        rcu_read_unlock();
 
-       if (sighand && !ctx->tsk) {
+       if (!sighand)
+               return 0;
+
+       if (!ctx->tsk) {
                unlock_task_sighand(lk->tsk, &lk->flags);
-               sighand = NULL;
+               return 0;
        }
 
-       return sighand != NULL;
+       if (lk->tsk->tgid == current->tgid)
+               lk->tsk = current;
+
+       return 1;
 }
 
 static void signalfd_unlock(struct signalfd_lockctx *lk)
@@ -331,7 +337,7 @@ asmlinkage long sys_signalfd(int ufd, sigset_t __user *user_mask, size_t sizemas
 
                init_waitqueue_head(&ctx->wqh);
                ctx->sigmask = sigmask;
-               ctx->tsk = current;
+               ctx->tsk = current->group_leader;
 
                sighand = current->sighand;
                /*