Messages in this thread | | | Date | Fri, 26 Jul 2019 11:45:47 +0100 | From | Mark Brown <> | Subject | Re: [PATCH] regulator: of: Add of_node_put() before return in function |
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On Fri, Jul 26, 2019 at 01:02:52PM +0530, Nishka Dasgupta wrote: > On 24/07/19 9:17 PM, Mark Brown wrote: > > On Wed, Jul 24, 2019 at 02:02:31PM +0530, Nishka Dasgupta wrote:
> > > The local variable search in regulator_of_get_init_node takes the value > > > returned by either of_get_child_by_name or of_node_get, both of which > > > get a node. If this node is not put before returning, it could cause a > > > memory leak. Hence put search before a mid-loop return statement. > > > Issue found with Coccinelle.
> > > - if (!strcmp(desc->of_match, name)) > > > + if (!strcmp(desc->of_match, name)) { > > > + of_node_put(search); > > > return of_node_get(child); > > > + }
> > Why not just remove the extra of_node_get() and a comment explaining why > > it's not needed?
> I'm sorry, I don't think I understand. I'm putting search in this patch; the > program was already getting child. Should I also return child directly > instead of getting it again, and continue to put search?
Your new code is dropping a reference then immediately reacquiring one to return it (introducing a race condition along the way). Why not just return the already held reference and not call any functions at all? [unhandled content-type:application/pgp-signature] | |