Patch "PM / Domains: Fix unsafe iteration over modified list of device links" has been added to the 4.9-stable tree

Patch "PM / Domains: Fix unsafe iteration over modified list of device links" has been added to the 4.9-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    PM / Domains: Fix unsafe iteration over modified list of device links

to the 4.9-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     pm-domains-fix-unsafe-iteration-over-modified-list-of-device-links.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From c6e83cac3eda5f7dd32ee1453df2f7abb5c6cd46 Mon Sep 17 00:00:00 2001
From: Krzysztof Kozlowski <krzk@kernel.org>
Date: Wed, 28 Jun 2017 16:56:18 +0200
Subject: PM / Domains: Fix unsafe iteration over modified list of device links

From: Krzysztof Kozlowski <krzk@kernel.org>

commit c6e83cac3eda5f7dd32ee1453df2f7abb5c6cd46 upstream.

pm_genpd_remove_subdomain() iterates over domain's master_links list and
removes matching element thus it has to use safe version of list
iteration.

Fixes: f721889ff65a ("PM / Domains: Support for generic I/O PM domains (v8)")
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/base/power/domain.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c
@@ -1244,7 +1244,7 @@ EXPORT_SYMBOL_GPL(pm_genpd_add_subdomain
 int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd,
 			      struct generic_pm_domain *subdomain)
 {
-	struct gpd_link *link;
+	struct gpd_link *l, *link;
 	int ret = -EINVAL;
 
 	if (IS_ERR_OR_NULL(genpd) || IS_ERR_OR_NULL(subdomain))
@@ -1260,7 +1260,7 @@ int pm_genpd_remove_subdomain(struct gen
 		goto out;
 	}
 
-	list_for_each_entry(link, &genpd->master_links, master_node) {
+	list_for_each_entry_safe(link, l, &genpd->master_links, master_node) {
 		if (link->slave != subdomain)
 			continue;
 


Patches currently in stable-queue which might be from krzk@kernel.org are

queue-4.9/pm-domains-fix-unsafe-iteration-over-modified-list-of-domain-providers.patch
queue-4.9/pm-domains-fix-unsafe-iteration-over-modified-list-of-domains.patch
queue-4.9/pm-domains-fix-unsafe-iteration-over-modified-list-of-device-links.patch