From: Cai Xinchen <caixinchen1@huawei.com>
To: <nicolas.bouchinet@oss.cyber.gouv.fr>, <xiujianfeng@huawei.com>,
<paul@paul-moore.com>, <jmorris@namei.org>, <serge@hallyn.com>,
<shuah@kernel.org>, <caixinchen1@huawei.com>
Cc: <linux-security-module@vger.kernel.org>,
<linux-kernel@vger.kernel.org>, <linux-kselftest@vger.kernel.org>,
<bpf@vger.kernel.org>, <lujialin4@huawei.com>
Subject: [PATCH -next 1/9] lockdown: Add break in lockdown_write
Date: Tue, 3 Nov 2026 16:24:13 +0800 [thread overview]
Message-ID: <20261103082421.3033195-2-caixinchen1@huawei.com> (raw)
In-Reply-To: <20261103082421.3033195-1-caixinchen1@huawei.com>
After the label is matched successful, any other levels judgements
are meaningless. Therefore, add break to return early
Signed-off-by: Cai Xinchen <caixinchen1@huawei.com>
---
security/lockdown/lockdown.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/security/lockdown/lockdown.c b/security/lockdown/lockdown.c
index 8d46886d2cca..263dcc80d839 100644
--- a/security/lockdown/lockdown.c
+++ b/security/lockdown/lockdown.c
@@ -139,8 +139,10 @@ static ssize_t lockdown_write(struct file *file, const char __user *buf,
enum lockdown_reason level = lockdown_levels[i];
const char *label = lockdown_reasons[level];
- if (label && !strcmp(state, label))
+ if (label && !strcmp(state, label)) {
err = lock_kernel_down("securityfs", level);
+ break;
+ }
}
kfree(state);
--
2.18.0.huawei.25
next prev parent reply other threads:[~2026-11-03 7:51 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-03 8:24 [PATCH -next 0/9] lockdown: fix the securityfs interface and add tests Cai Xinchen
2026-11-03 8:24 ` Cai Xinchen [this message]
2026-11-03 8:24 ` [PATCH -next 2/9] lockdown: remove useless decrement operation Cai Xinchen
2026-11-03 8:24 ` [PATCH -next 3/9] lockdown: bound the status string with scnprintf Cai Xinchen
2026-11-03 8:24 ` [PATCH -next 4/9] lockdown: select SECURITYFS Cai Xinchen
2026-11-03 8:24 ` [PATCH -next 5/9] lsm: remove unused lockdown audit data Cai Xinchen
2026-11-03 8:24 ` [PATCH -next 6/9] lockdown: drop an unused include and simplify secfs init Cai Xinchen
2026-11-03 8:24 ` [PATCH -next 7/9] lockdown: move lockdown_reasons next to its only user Cai Xinchen
2026-11-03 8:24 ` [PATCH -next 8/9] Documentation/ABI: document the lockdown securityfs file Cai Xinchen
2026-11-03 8:24 ` [PATCH -next 9/9] selftests/lsm: add lockdown securityfs test Cai Xinchen
2026-11-06 19:55 ` [PATCH -next 0/9] lockdown: fix the securityfs interface and add tests Serge E. Hallyn
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