On (03/15/15 01:00), Josh Triplett wrote:
[..]
> +
> +/* Handle the CLONE_FD case for copy_process. */
> +int clonefd_do_clone(u64 clone_flags, struct task_struct *p,
> + struct clone4_args *args, struct clonefd_setup *setup)
> +{
> + int flags;
> + struct file *file;
> + int fd;
> +
> + p->clonefd = !!(clone_flags & CLONE_FD);
> + if (!p->clonefd)
> + return 0;
> +
> + if (args->clonefd_flags & ~(O_CLOEXEC | O_NONBLOCK))
> + return -EINVAL;
> +
> + init_waitqueue_head(&p->clonefd_wqh);
> +
> + get_task_struct(p);
> + flags = O_RDONLY | FMODE_ATOMIC_POS | args->clonefd_flags;
> + file = anon_inode_getfile("[process]", &clonefd_fops, p, flags);
> + if (IS_ERR(file)) {
> + put_task_struct(p);
> + return PTR_ERR(file);
> + }
> +
> + fd = get_unused_fd_flags(flags);
> + if (fd < 0) {
+ put_task_struct(p); ?
> + fput(file);
> + return fd;
> + }
> +
> + setup->fd = fd;
> + setup->file = file;
> + return 0;
> +}
[..]
-ss
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