linux-kernel - [PATCH 10/17] mm/ksw: coordinate watch and stack for full functionality

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: <20250828073311.1116593-11-wangjinchao600@gmail.com>
Date: Thu, 28 Aug 2025 15:32:43 +0800
From: Jinchao Wang <wangjinchao600@...il.com>
To: Andrew Morton <akpm@...ux-foundation.org>,
	Masami Hiramatsu <mhiramat@...nel.org>,
	"Naveen N . Rao" <naveen@...nel.org>,
	linux-mm@...ck.org,
	linux-trace-kernel@...r.kernel.org
Cc: linux-kernel@...r.kernel.org,
	Jinchao Wang <wangjinchao600@...il.com>
Subject: [PATCH 10/17] mm/ksw: coordinate watch and stack for full functionality

This patch connects the watch and stack so that all components function
together.

Signed-off-by: Jinchao Wang <wangjinchao600@...il.com>
---
 mm/kstackwatch/kernel.c | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/mm/kstackwatch/kernel.c b/mm/kstackwatch/kernel.c
index 95ade95abde1..4c5fbcaddab0 100644
--- a/mm/kstackwatch/kernel.c
+++ b/mm/kstackwatch/kernel.c
@@ -1,10 +1,13 @@
 // SPDX-License-Identifier: GPL-2.0
+#include <linux/kern_levels.h>
+#include <linux/kernel.h>
 #include <linux/kstrtox.h>
 #include <linux/module.h>
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
 #include <linux/string.h>
 #include <linux/uaccess.h>
+#include <linux/utsname.h>
 
 #include "kstackwatch.h"
 
@@ -22,6 +25,29 @@ MODULE_PARM_DESC(panic_on_catch,
 
 static int ksw_start_watching(void)
 {
+	int ret;
+
+	if (strlen(ksw_config->function) == 0) {
+		pr_err("KSW: no target function specified\n");
+		return -EINVAL;
+	}
+
+	/*
+	 * Watch init will preallocate the HWBP,
+	 * so it must happen before stack init
+	 */
+	ret = ksw_watch_init(ksw_config);
+	if (ret) {
+		pr_err("KSW: ksw_watch_init ret: %d\n", ret);
+		return ret;
+	}
+
+	ret = ksw_stack_init(ksw_config);
+	if (ret) {
+		pr_err("KSW: ksw_stack_init_fprobe ret: %d\n", ret);
+		ksw_watch_exit();
+		return ret;
+	}
 	watching_active = true;
 
 	pr_info("KSW: start watching %s\n", ksw_config->config_str);
@@ -30,6 +56,8 @@ static int ksw_start_watching(void)
 
 static void ksw_stop_watching(void)
 {
+	ksw_stack_exit();
+	ksw_watch_exit();
 	watching_active = false;
 
 	pr_info("KSW: stop watching %s\n", ksw_config->config_str);
-- 
2.43.0