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Message-ID: <20220518131626.109123-1-linyujun809@huawei.com>
Date: Wed, 18 May 2022 21:16:26 +0800
From: Lin Yujun <linyujun809@...wei.com>
To: <peterz@...radead.org>, <mingo@...hat.com>, <acme@...nel.org>,
<mark.rutland@....com>, <alexander.shishkin@...ux.intel.com>,
<jolsa@...nel.org>, <namhyung@...nel.org>, <tglx@...utronix.de>,
<bp@...en8.de>, <dave.hansen@...ux.intel.com>, <x86@...nel.org>,
<hpa@...or.com>
CC: <linux-perf-users@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<gustavoars@...nel.org>, <johnny.chenyi@...wei.com>,
<chenjiahao16@...wei.com>, <chenlifu@...wei.com>,
<lizhengyu3@...wei.com>, <liaochang1@...wei.com>,
<linyujun809@...wei.com>, <wangzhu9@...wei.com>,
<xuyihang@...wei.com>, <chris.zjh@...wei.com>,
<zouyipeng@...wei.com>
Subject: [PATCH -next] x86/events:Use struct_size() helper in kzalloc()
Replace sizeof() with struct_size() to avoid potential integer
or heap overflow.
Also, address the following sparse warnings:
arch/x86/events/rapl.c:685:16: warning: using sizeof on a
flexible structure
Signed-off-by: Lin Yujun <linyujun809@...wei.com>
---
arch/x86/events/rapl.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/events/rapl.c b/arch/x86/events/rapl.c
index 77e3a47af5ad..c7e79f0ac04f 100644
--- a/arch/x86/events/rapl.c
+++ b/arch/x86/events/rapl.c
@@ -685,7 +685,7 @@ static int __init init_rapl_pmus(void)
int maxdie = topology_max_packages() * topology_max_die_per_package();
size_t size;
- size = sizeof(*rapl_pmus) + maxdie * sizeof(struct rapl_pmu *);
+ size = struct_size(rapl_pmus, pmus, maxdie);
rapl_pmus = kzalloc(size, GFP_KERNEL);
if (!rapl_pmus)
return -ENOMEM;
--
2.17.1
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