From: Eric Dumazet
> Sent: 09 June 2016 22:17
> On Thu, 2016-06-09 at 23:50 +0300, Saeed Mahameed wrote:
> > From: Matthew Finlay <matt@xxxxxxxxxxxx>
>
>
> > diff --git a/net/socket.c b/net/socket.c
> > index a1bd161..67de200 100644
> > --- a/net/socket.c
> > +++ b/net/socket.c
> > @@ -382,6 +382,7 @@ struct file *sock_alloc_file(struct socket *sock, int flags, const char *dname)
> > }
> >
> > sock->file = file;
> > + file->f_owner.sock_pid = find_get_pid(task_pid_nr(current));
> > file->f_flags = O_RDWR | (flags & O_NONBLOCK);
> > file->private_data = sock;
> > return file;
>
> Wow, that is a serious memory leak weapon (of struct pid)
>
> Why don't you store the pid value, instead of a pointer ?
Since the numeric 'pid' values can be reused (with no grace time) you'd
need to hold a reference to the pid structure (added in about 2.6.27) instead.
Which is just a smaller memory leak!
(and annoyingly a non-gpl driver can't drop a reference to it).
David
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