linux-kernel - [PATCH] lkdtm: Do not depend on BLOCK and clean up headers

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 for Android: free password hash cracker in your pocket

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

Message-ID: <20181127171537.GA5300@beast>
Date:   Tue, 27 Nov 2018 09:15:37 -0800
From:   Kees Cook <keescook@...omium.org>
To:     Christophe Leroy <christophe.leroy@....fr>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Arnd Bergmann <arnd@...db.de>, linuxppc-dev@...ts.ozlabs.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] lkdtm: Do not depend on BLOCK and clean up headers

After the transition to kprobes, symbols are resolved at runtime. This
means there is no need to have all the Kconfig and header logic to
avoid build failures. This also paves the way to having arbitrary test
locations.

Reported-by: Christophe Leroy <christophe.leroy@....fr>
Signed-off-by: Kees Cook <keescook@...omium.org>
---
 drivers/misc/lkdtm/core.c | 9 ---------
 lib/Kconfig.debug         | 1 -
 2 files changed, 10 deletions(-)

diff --git a/drivers/misc/lkdtm/core.c b/drivers/misc/lkdtm/core.c
index 2837dc77478e..5d41c2230d2e 100644
--- a/drivers/misc/lkdtm/core.c
+++ b/drivers/misc/lkdtm/core.c
@@ -37,16 +37,9 @@
 #include <linux/kprobes.h>
 #include <linux/list.h>
 #include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/hrtimer.h>
 #include <linux/slab.h>
-#include <scsi/scsi_cmnd.h>
 #include <linux/debugfs.h>
 
-#ifdef CONFIG_IDE
-#include <linux/ide.h>
-#endif
-
 #define DEFAULT_COUNT 10
 
 static int lkdtm_debugfs_open(struct inode *inode, struct file *file);
@@ -102,9 +95,7 @@ static struct crashpoint crashpoints[] = {
 	CRASHPOINT("MEM_SWAPOUT",	 "shrink_inactive_list"),
 	CRASHPOINT("TIMERADD",		 "hrtimer_start"),
 	CRASHPOINT("SCSI_DISPATCH_CMD",	 "scsi_dispatch_cmd"),
-# ifdef CONFIG_IDE
 	CRASHPOINT("IDE_CORE_CP",	 "generic_ide_ioctl"),
-# endif
 #endif
 };
 
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 1af29b8224fd..0dd65b4b2ad2 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -1685,7 +1685,6 @@ if RUNTIME_TESTING_MENU
 config LKDTM
 	tristate "Linux Kernel Dump Test Tool Module"
 	depends on DEBUG_FS
-	depends on BLOCK
 	help
 	This module enables testing of the different dumping mechanisms by
 	inducing system failures at predefined crash points.
-- 
2.17.1


-- 
Kees Cook