lkml.org 
[lkml]   [2022]   [Sep]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 4.9 10/30] mips/pic32/pic32mzda: Fix refcount leak bugs
Hi!

> [ Upstream commit eb9e9bc4fa5fb489c92ec588b3fb35f042ba6d86 ]
>
> of_find_matching_node(), of_find_compatible_node() and
> of_find_node_by_path() will return node pointers with refcout
> incremented. We should call of_node_put() when they are not
> used anymore.

True. But we absolutely should not call put when we still use the
reference.

> +++ b/arch/mips/pic32/pic32mzda/init.c
> @@ -131,13 +131,18 @@ static int __init pic32_of_prepare_platform_data(struct of_dev_auxdata *lookup)
> np = of_find_compatible_node(NULL, NULL, lookup->compatible);
> if (np) {
> lookup->name = (char *)np->name;
> - if (lookup->phys_addr)
> + if (lookup->phys_addr) {
> + of_node_put(np);
> continue;
> + }
> if (!of_address_to_resource(np, 0, &res))
> lookup->phys_addr = res.start;
> + of_node_put(np);
> }
> }

As we stored np->name in lookup, we should not be putting that node,
we are still using it.

Best regards,
Pavel
--
DENX Software Engineering GmbH, Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
[unhandled content-type:application/pgp-signature]
\
 
 \ /
  Last update: 2022-09-26 14:11    [W:0.233 / U:0.200 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site