wt., 12 lis 2019 o 00:37 Thomas Gleixner <tglx@xxxxxxxxxxxxx> napisał(a):
>
> Bartosz,
>
> On Sun, 10 Nov 2019, Bartosz Golaszewski wrote:
> > sob., 9 lis 2019 o 16:58 Colin King <colin.king@xxxxxxxxxxxxx> napisał(a):
> > >
> > > From: Colin Ian King <colin.king@xxxxxxxxxxxxx>
> > >
> > > In the case where request_irq fails, the return path does not kfree
> > > clockevent and hence we have a memory leak. Fix this by kfree'ing
>
> s/we have/creates/ or whatever verb you prefer.
>
> > > clockevent before returning.
> > >
> > > Addresses-Coverity: ("Resource leak")
> > > Fixes: 721154f972aa ("clocksource/drivers/davinci: Add support for clockevents")
> > > Signed-off-by: Colin Ian King <colin.king@xxxxxxxxxxxxx>
> > > ---
> > > drivers/clocksource/timer-davinci.c | 1 +
> > > 1 file changed, 1 insertion(+)
> > >
> > > diff --git a/drivers/clocksource/timer-davinci.c b/drivers/clocksource/timer-davinci.c
> > > index 62745c962049..910d4d2f0d64 100644
> > > --- a/drivers/clocksource/timer-davinci.c
> > > +++ b/drivers/clocksource/timer-davinci.c
> > > @@ -299,6 +299,7 @@ int __init davinci_timer_register(struct clk *clk,
> > > "clockevent/tim12", clockevent);
> > > if (rv) {
> > > pr_err("Unable to request the clockevent interrupt");
> > > + kfree(clockevent);
> > > return rv;
> > > }
> > >
> > > --
> > > 2.20.1
> > >
> >
> > Hi Daniel,
> >
> > this is what I think the third time someone tries to "fix" this
> > driver's "memory leaks". I'm not sure what the general approach in
> > clocksource is but it doesn't make sense to free resources on
> > non-recoverable errors, does it? Should I add a comment about it or
> > you'll just take those "fixes" to stop further such submissions?
>
> There are two ways to deal with that:
>
> 1) If the error is really unrecoverable, panic right there. No point
> to continue.
Fair enough.
Acked-by: Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx>
>
> 2) If there is even a minimal chance to survive, free the memory and
> return.
>
> Adding a comment is just a useless non-option.
>
> Thanks,
>
> tglx
