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: <1589859071-25898-2-git-send-email-nixiaoming@huawei.com>
Date:   Tue, 19 May 2020 11:31:08 +0800
From:   Xiaoming Ni <nixiaoming@...wei.com>
To:     <mcgrof@...nel.org>, <keescook@...omium.org>, <yzaikin@...gle.com>,
        <adobriyan@...il.com>, <mingo@...nel.org>, <nixiaoming@...wei.com>,
        <gpiccoli@...onical.com>, <rdna@...com>, <patrick.bellasi@....com>,
        <sfr@...b.auug.org.au>, <akpm@...ux-foundation.org>,
        <mhocko@...e.com>, <penguin-kernel@...ove.sakura.ne.jp>,
        <vbabka@...e.cz>, <tglx@...utronix.de>, <peterz@...radead.org>,
        <Jisheng.Zhang@...aptics.com>, <khlebnikov@...dex-team.ru>,
        <bigeasy@...utronix.de>, <pmladek@...e.com>,
        <linux-kernel@...r.kernel.org>, <linux-fsdevel@...r.kernel.org>
CC:     <wangle6@...wei.com>, <alex.huangjianhui@...wei.com>
Subject: [PATCH v4 1/4] sysctl: Add register_sysctl_init() interface

In order to eliminate the duplicate code for registering the sysctl
interface during the initialization of each feature, add the
register_sysctl_init() interface

Signed-off-by: Xiaoming Ni <nixiaoming@...wei.com>
Reviewed-by: Kees Cook <keescook@...omium.org>
---
 include/linux/sysctl.h |  2 ++
 kernel/sysctl.c        | 19 +++++++++++++++++++
 2 files changed, 21 insertions(+)

diff --git a/include/linux/sysctl.h b/include/linux/sysctl.h
index 50bb7f3..857ba93 100644
--- a/include/linux/sysctl.h
+++ b/include/linux/sysctl.h
@@ -197,6 +197,8 @@ struct ctl_table_header *register_sysctl_paths(const struct ctl_path *path,
 void unregister_sysctl_table(struct ctl_table_header * table);
 
 extern int sysctl_init(void);
+extern void register_sysctl_init(const char *path, struct ctl_table *table,
+				 const char *table_name);
 void do_sysctl_args(void);
 
 extern int pwrsw_enabled;
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index cc1fcba..8afd713 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -3358,6 +3358,25 @@ int __init sysctl_init(void)
 	kmemleak_not_leak(hdr);
 	return 0;
 }
+
+/*
+ * The sysctl interface is used to modify the interface value,
+ * but the feature interface has default values. Even if register_sysctl fails,
+ * the feature body function can also run. At the same time, malloc small
+ * fragment of memory during the system initialization phase, almost does
+ * not fail. Therefore, the function return is designed as void
+ */
+void __init register_sysctl_init(const char *path, struct ctl_table *table,
+				 const char *table_name)
+{
+	struct ctl_table_header *hdr = register_sysctl(path, table);
+
+	if (unlikely(!hdr)) {
+		pr_err("failed when register_sysctl %s to %s\n", table_name, path);
+		return;
+	}
+	kmemleak_not_leak(hdr);
+}
 #endif /* CONFIG_SYSCTL */
 /*
  * No sense putting this after each symbol definition, twice,
-- 
1.8.5.6

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ