[PATCH v3 5/7] lib/cgroup_cpus: don't zero cpumasks in group_cpus_evenly() on allocation

Yury Norov
2023-12-12T04:21:35Z

nmsk and npresmsk are both allocated with zalloc_cpumask_var(), but they
are initialized by copying later in the code, and so may be allocated
uninitialized.

Signed-off-by: Yury Norov <yury.norov@gmail.com>
---
lib/group_cpus.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/group_cpus.c b/lib/group_cpus.c
index cded3c8ea63b..c7fcd04c87bf 100644
--- a/lib/group_cpus.c
+++ b/lib/group_cpus.c
@@ -347,10 +347,10 @@ struct cpumask *group_cpus_evenly(unsigned int numgrps)
int ret = -ENOMEM;
struct cpumask *masks = NULL;

- if (!zalloc_cpumask_var(&nmsk, GFP_KERNEL))
+ if (!alloc_cpumask_var(&nmsk, GFP_KERNEL))
return NULL;

- if (!zalloc_cpumask_var(&npresmsk, GFP_KERNEL))
+ if (!alloc_cpumask_var(&npresmsk, GFP_KERNEL))
goto fail_nmsk;

node_to_cpumask = alloc_node_to_cpumask();
--
2.40.1