From: "Gustavo A. R. Silva" <gustavoars@kernel.org>
To: Jens Axboe <axboe@kernel.dk>
Cc: linux-block@vger.kernel.org, linux-kernel@vger.kernel.org,
"Gustavo A. R. Silva" <gustavo@embeddedor.com>
Subject: [PATCH][next] blk-iocost: Use struct_size() in kzalloc_node()
Date: Fri, 19 Jun 2020 18:08:30 -0500 [thread overview]
Message-ID: <20200619230830.GA25608@embeddedor> (raw)
Make use of the struct_size() helper instead of an open-coded version
in order to avoid any potential type mistakes.
This code was detected with the help of Coccinelle and, audited and
fixed manually.
Addresses-KSPP-ID: https://github.com/KSPP/linux/issues/83
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
---
block/blk-iocost.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/block/blk-iocost.c b/block/blk-iocost.c
index 8ac4aad66ebc..cea5ee9be639 100644
--- a/block/blk-iocost.c
+++ b/block/blk-iocost.c
@@ -2045,8 +2045,7 @@ static struct blkg_policy_data *ioc_pd_alloc(gfp_t gfp, struct request_queue *q,
int levels = blkcg->css.cgroup->level + 1;
struct ioc_gq *iocg;
- iocg = kzalloc_node(sizeof(*iocg) + levels * sizeof(iocg->ancestors[0]),
- gfp, q->node);
+ iocg = kzalloc_node(struct_size(iocg, ancestors, levels), gfp, q->node);
if (!iocg)
return NULL;
--
2.27.0
next reply other threads:[~2020-06-19 23:03 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-19 23:08 Gustavo A. R. Silva [this message]
2020-06-20 21:25 ` [PATCH][next] blk-iocost: Use struct_size() in kzalloc_node() Jens Axboe
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