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Commit 20ba5d73 authored by Al Viro's avatar Al Viro
Browse files

switch signalfd4() to fget_light/fput_light 



Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent 545ec2c7

fs/signalfd.c

+4 −3
Original line number Original line Diff line number Diff line
@@ -269,12 +269,13 @@ SYSCALL_DEFINE4(signalfd4, int, ufd, sigset_t __user *, user_mask, 
		if (ufd < 0)

		if (ufd < 0)

			kfree(ctx);

			kfree(ctx);

	} else {

	} else {

		struct file *file = fget(ufd);

		int fput_needed;

		struct file *file = fget_light(ufd, &fput_needed);

		if (!file)

		if (!file)

			return -EBADF;

			return -EBADF;

		ctx = file->private_data;

		ctx = file->private_data;

		if (file->f_op != &signalfd_fops) {

		if (file->f_op != &signalfd_fops) {

			fput(file);

			fput_light(file, fput_needed);

			return -EINVAL;

			return -EINVAL;

		}

		}

		spin_lock_irq(&current->sighand->siglock);

		spin_lock_irq(&current->sighand->siglock);
@@ -282,7 +283,7 @@ SYSCALL_DEFINE4(signalfd4, int, ufd, sigset_t __user *, user_mask, 
		spin_unlock_irq(&current->sighand->siglock);

		spin_unlock_irq(&current->sighand->siglock);





		wake_up(&current->sighand->signalfd_wqh);

		wake_up(&current->sighand->signalfd_wqh);

		fput(file);

		fput_light(file, fput_needed);

	}

	}





	return ufd;

	return ufd;