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Date: Mon, 26 Aug 2013 17:24:00 +0100
From: Djalal Harouni <tixxdz@...ndz.org>
To: Al Viro <viro@...iv.linux.org.uk>,
Andrew Morton <akpm@...ux-foundation.org>,
"Eric W. Biederman" <ebiederm@...ssion.com>,
linux-kernel@...r.kernel.org,
kernel-hardening@...ts.openwall.com
Cc: Djalal Harouni <tixxdz@...ndz.org>
Subject: [PATCH 2/2] procfs: restore 0400 permissions on /proc/*/pagemap
Do not give an fd on privileged /proc/*/pagemap files for free.
Restore the previous 0400 mode
Signed-off-by: Djalal Harouni <tixxdz@...ndz.org>
---
fs/proc/base.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/fs/proc/base.c b/fs/proc/base.c
index 6b162cd..93a1c89 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -2605,7 +2605,7 @@ static const struct pid_entry tgid_base_stuff[] = {
#ifdef CONFIG_PROC_PAGE_MONITOR
REG("clear_refs", S_IWUSR, proc_clear_refs_operations),
REG("smaps", S_IRUGO, proc_pid_smaps_operations),
- REG("pagemap", S_IRUGO, proc_pagemap_operations),
+ REG("pagemap", S_IRUSR, proc_pagemap_operations),
#endif
#ifdef CONFIG_SECURITY
DIR("attr", S_IRUGO|S_IXUGO, proc_attr_dir_inode_operations, proc_attr_dir_operations),
@@ -2943,7 +2943,7 @@ static const struct pid_entry tid_base_stuff[] = {
#ifdef CONFIG_PROC_PAGE_MONITOR
REG("clear_refs", S_IWUSR, proc_clear_refs_operations),
REG("smaps", S_IRUGO, proc_tid_smaps_operations),
- REG("pagemap", S_IRUGO, proc_pagemap_operations),
+ REG("pagemap", S_IRUSR, proc_pagemap_operations),
#endif
#ifdef CONFIG_SECURITY
DIR("attr", S_IRUGO|S_IXUGO, proc_attr_dir_inode_operations, proc_attr_dir_operations),
--
1.7.11.7
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