linux-kernel - [PATCH 6.1 07/10] cacheinfo: Initialize variables in fetch_cache

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20251020173624.20228-8-wen.yang@linux.dev>
Date: Tue, 21 Oct 2025 01:36:21 +0800
From: Wen Yang <wen.yang@...ux.dev>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Jon Hunter <jonathanh@...dia.com>
Cc: stable@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Pierre Gondois <pierre.gondois@....com>,
	kernel test robot <lkp@...el.com>,
	Dan Carpenter <error27@...il.com>,
	Conor Dooley <conor.dooley@...rochip.com>,
	Wen Yang <wen.yang@...ux.dev>
Subject: [PATCH 6.1 07/10] cacheinfo: Initialize variables in fetch_cache_info()

From: Pierre Gondois <pierre.gondois@....com>

[ Upstream commit ecaef469920fd6d2c7687f19081946f47684a423 ]

Set potentially uninitialized variables to 0. This is particularly
relevant when CONFIG_ACPI_PPTT is not set.

Reported-by: kernel test robot <lkp@...el.com>
Link: https://lore.kernel.org/all/202301052307.JYt1GWaJ-lkp@intel.com/
Reported-by: Dan Carpenter <error27@...il.com>
Link: https://lore.kernel.org/all/Y86iruJPuwNN7rZw@kili/
Fixes: 5944ce092b97 ("arch_topology: Build cacheinfo from primary CPU")
Signed-off-by: Pierre Gondois <pierre.gondois@....com>
Reviewed-by: Conor Dooley <conor.dooley@...rochip.com>
Link: https://lore.kernel.org/r/20230124154053.355376-2-pierre.gondois@arm.com
Signed-off-by: Wen Yang <wen.yang@...ux.dev>
---
 drivers/base/cacheinfo.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/base/cacheinfo.c b/drivers/base/cacheinfo.c
index cd943d06d074..26ae36f2ff58 100644
--- a/drivers/base/cacheinfo.c
+++ b/drivers/base/cacheinfo.c
@@ -440,7 +440,7 @@ int allocate_cache_info(int cpu)
 int fetch_cache_info(unsigned int cpu)
 {
 	struct cpu_cacheinfo *this_cpu_ci;
-	unsigned int levels, split_levels;
+	unsigned int levels = 0, split_levels = 0;
 	int ret;
 
 	if (acpi_disabled) {
-- 
2.25.1