linux-kernel - [PATCH 0/2] rcu: Use kcalloc() instead of kzalloc()

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Message-Id: <20250821134117.6347-1-rongqianfeng@vivo.com>
Date: Thu, 21 Aug 2025 21:41:15 +0800
From: Qianfeng Rong <rongqianfeng@...o.com>
To: Davidlohr Bueso <dave@...olabs.net>,
	"Paul E. McKenney" <paulmck@...nel.org>,
	Josh Triplett <josh@...htriplett.org>,
	Frederic Weisbecker <frederic@...nel.org>,
	Neeraj Upadhyay <neeraj.upadhyay@...nel.org>,
	Joel Fernandes <joelagnelf@...dia.com>,
	Boqun Feng <boqun.feng@...il.com>,
	Uladzislau Rezki <urezki@...il.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	Lai Jiangshan <jiangshanlai@...il.com>,
	Zqiang <qiang.zhang@...ux.dev>,
	linux-kernel@...r.kernel.org (open list:TORTURE-TEST MODULES),
	rcu@...r.kernel.org (open list:READ-COPY UPDATE (RCU))
Cc: Qianfeng Rong <rongqianfeng@...o.com>
Subject: [PATCH 0/2] rcu: Use kcalloc() instead of kzalloc()

Replace kzalloc() with kcalloc() in kernel/rcu.  As noted in the kernel
documentation [1], open-coded multiplication in allocator arguments is
discouraged because it can lead to integer overflow.

Use kcalloc() to gain built-in overflow protection, making memory
allocation safer when calculating allocation size compared to explicit
multiplication.

Link: https://www.kernel.org/doc/html/next/process/deprecated.html#open-coded-arithmetic-in-allocator-arguments #1
Signed-off-by: Qianfeng Rong <rongqianfeng@...o.com>

Qianfeng Rong (2):
  rcutorture: Use kcalloc() instead of kzalloc()
  refscale: Use kcalloc() instead of kzalloc()

 kernel/rcu/rcutorture.c | 4 ++--
 kernel/rcu/refscale.c   | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

-- 
2.34.1