From: Yury Norov <yury.norov@gmail.com>
To: Andrew Morton <akpm@linux-foundation.org>,
Thomas Gleixner <tglx@linutronix.de>,
Ming Lei <ming.lei@redhat.com>,
linux-kernel@vger.kernel.org
Cc: Yury Norov <yury.norov@gmail.com>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Breno Leitao <leitao@debian.org>,
Nathan Chancellor <nathan@kernel.org>,
Rasmus Villemoes <linux@rasmusvillemoes.dk>,
Zi Yan <ziy@nvidia.com>
Subject: [PATCH 5/9] lib/group_cpus: don't zero cpumasks in group_cpus_evenly() on allocation
Date: Fri, 19 Jan 2024 18:50:49 -0800 [thread overview]
Message-ID: <20240120025053.684838-6-yury.norov@gmail.com> (raw)
In-Reply-To: <20240120025053.684838-1-yury.norov@gmail.com>
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 952aac9eaa81..72c308f8c322 100644
--- a/lib/group_cpus.c
+++ b/lib/group_cpus.c
@@ -354,10 +354,10 @@ 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
next prev parent reply other threads:[~2024-01-20 2:51 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-01-20 2:50 [PATCH v5 0/9] lib/group_cpus: rework grp_spread_init_one() and make it O(1) Yury Norov
2024-01-20 2:50 ` [PATCH 1/9] cpumask: introduce for_each_cpu_and_from() Yury Norov
2024-01-20 3:03 ` Ming Lei
2024-01-21 19:50 ` Yury Norov
2024-01-22 2:41 ` Ming Lei
2024-01-20 2:50 ` [PATCH 2/9] lib/group_cpus: optimize inner loop in grp_spread_init_one() Yury Norov
2024-01-20 3:17 ` Ming Lei
2024-01-20 7:03 ` Ming Lei
2024-01-20 2:50 ` [PATCH 3/9] lib/group_cpus: relax atomicity requirement " Yury Norov
2024-01-20 2:50 ` [PATCH 4/9] lib/group_cpus: optimize outer loop " Yury Norov
2024-01-20 3:51 ` Ming Lei
2024-01-20 6:17 ` Ming Lei
2024-01-20 2:50 ` Yury Norov [this message]
2024-01-20 2:50 ` [PATCH 6/9] lib/group_cpus: drop unneeded cpumask_empty() call in __group_cpus_evenly() Yury Norov
2024-01-20 2:50 ` [PATCH 7/9] cpumask: define cleanup function for cpumasks Yury Norov
2024-01-20 2:50 ` [PATCH 8/9] lib/group_cpus: rework group_cpus_evenly() Yury Norov
2024-01-20 2:50 ` [PATCH 9/9] lib/group_cpus: simplify group_cpus_evenly() for more Yury Norov
-- strict thread matches above, loose matches on Subject: below --
2023-12-28 20:09 [PATCH v4 0/9] lib/group_cpus: rework grp_spread_init_one() and make it O(1) Yury Norov
2023-12-28 20:09 ` [PATCH 5/9] lib/group_cpus: don't zero cpumasks in group_cpus_evenly() on allocation Yury Norov
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