On Tue, 23 Jan 2007 21:50:47 -0800 Andrew Morton <[email protected]> wrote:
> On Wed, 17 Jan 2007 10:55:54 +0100
> Sébastien Dugué <[email protected]> wrote:
>
> > +asmlinkage long
> > +compat_sys_lio_submit(aio_context_t ctx_id, int mode, int nr, u32 __user *iocb,
> > + struct compat_sigevent __user *sig_user)
> > +{
> > + struct kioctx *ctx;
> > + struct lio_event *lio = NULL;
> > + struct sigevent __user *event = NULL;
> > + long ret = 0;
> > +
> > + if (unlikely(nr < 0))
> > + return -EINVAL;
> > +
> > + if (unlikely(!access_ok(VERIFY_READ, iocb, (nr * sizeof(u32)))))
> > + return -EFAULT;
> > +
> > + ctx = lookup_ioctx(ctx_id);
> > + if (unlikely(!ctx))
> > + return -EINVAL;
> > +
> > + if (sig_user) {
> > + struct sigevent kevent;
> > + event = compat_alloc_user_space(sizeof(struct sigevent));
> > + if (get_compat_sigevent(&kevent, sig_user) ||
> > + copy_to_user(event, &kevent, sizeof(struct sigevent)))
> > + return -EFAULT;
>
> I think we just leaked a ref against the ioctx.
Right, will fix.
>
> That's two. Please re-review the whole patchset for leaks like this.
Well, this particular patch did not have much review so far (contrary to the
the other patches in the patchset). That's why I posted it mainly
for comments and not expecting it to make it to -mm so soon.
>
> Please also do not do returns from the middle of functions like this. It's just
> asking for resource leaks, either now or in the future.
>
Argh, yes. Who wrote that code? ;-)
Thanks,
Sébastien.
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