From 41795a8a3cff8e4ba54236ca16c3814ba9cd7f39 Mon Sep 17 00:00:00 2001 From: Jon Hunter Date: Fri, 4 Mar 2016 10:55:15 +0000 Subject: [PATCH] PM / Domains: Fix potential NULL pointer dereference In the function of_genpd_get_from_provider(), we never check to see if the argument 'genpdspec' is NULL before dereferencing it. Add error checking to handle any NULL pointers. Signed-off-by: Jon Hunter Acked-by: Ulf Hansson Signed-off-by: Rafael J. Wysocki --- drivers/base/power/domain.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c index 79f5d3965931..56705b52758e 100644 --- a/drivers/base/power/domain.c +++ b/drivers/base/power/domain.c @@ -1702,6 +1702,9 @@ struct generic_pm_domain *of_genpd_get_from_provider( struct generic_pm_domain *genpd = ERR_PTR(-ENOENT); struct of_genpd_provider *provider; + if (!genpdspec) + return ERR_PTR(-EINVAL); + mutex_lock(&of_genpd_mutex); /* Check if we have such a provider in our array */ -- 2.20.1