From: Joe Perches <joe@perches.com>
To: Dan Rosenberg <drosenberg@vsecurity.com>,
LKML <linux-kernel@vger.kernel.org>
Cc: Ingo Molnar <mingo@elte.hu>, Eugene Teo <eugeneteo@kernel.org>,
Kees Cook <kees.cook@canonical.com>,
Andrew Morton <akpm@linux-foundation.org>,
Linus Torvalds <torvalds@linux-foundation.org>
Subject: [PATCH] Fix dmesg_restrict build failure with CONFIG_EMBEDDED=y and CONFIG_PRINTK=n
Date: Sat, 13 Nov 2010 09:26:16 -0800 [thread overview]
Message-ID: <1289669176.16461.12.camel@Joe-Laptop> (raw)
dmesg_restrict is guarded by #ifdef CONFIG_PRINTK in kernel.h
Its uses need to be guarded as well.
Signed-off-by: Joe Perches <joe@perches.com>
---
kernel/sysctl.c | 2 +-
security/commoncap.c | 2 ++
2 files changed, 3 insertions(+), 1 deletions(-)
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index b65bf63..5abfa15 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -702,7 +702,6 @@ static struct ctl_table kern_table[] = {
.extra1 = &zero,
.extra2 = &ten_thousand,
},
-#endif
{
.procname = "dmesg_restrict",
.data = &dmesg_restrict,
@@ -712,6 +711,7 @@ static struct ctl_table kern_table[] = {
.extra1 = &zero,
.extra2 = &one,
},
+#endif
{
.procname = "ngroups_max",
.data = &ngroups_max,
diff --git a/security/commoncap.c b/security/commoncap.c
index 04b80f9..29f2368 100644
--- a/security/commoncap.c
+++ b/security/commoncap.c
@@ -895,8 +895,10 @@ int cap_syslog(int type, bool from_file)
{
if (type != SYSLOG_ACTION_OPEN && from_file)
return 0;
+#ifdef CONFIG_PRINTK
if (dmesg_restrict && !capable(CAP_SYS_ADMIN))
return -EPERM;
+#endif
if ((type != SYSLOG_ACTION_READ_ALL &&
type != SYSLOG_ACTION_SIZE_BUFFER) && !capable(CAP_SYS_ADMIN))
return -EPERM;
next reply other threads:[~2010-11-13 17:26 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-13 17:26 Joe Perches [this message]
2010-11-13 17:50 ` [PATCH] Fix dmesg_restrict build failure with CONFIG_EMBEDDED=y and CONFIG_PRINTK=n Linus Torvalds
2010-11-13 18:25 ` Dan Rosenberg
2010-11-13 20:22 ` Linus Torvalds
2010-11-14 3:05 ` Kees Cook
2010-11-14 12:35 ` Ingo Molnar
2010-11-13 19:51 ` Joe Perches
2010-11-13 20:01 ` Joe Perches
2010-11-13 20:31 ` Linus Torvalds
2010-11-15 1:16 ` James Morris
2010-11-15 17:04 ` Eric Paris
2010-11-15 17:34 ` Eric Paris
2010-11-15 17:41 ` Linus Torvalds
2010-11-15 17:45 ` Eric Paris
2010-11-15 18:20 ` Linus Torvalds
2010-11-15 22:13 ` James Morris
2010-11-15 22:43 ` Eric Paris
2010-11-15 22:58 ` James Morris
2010-11-15 23:08 ` Eric Paris
2010-11-15 22:16 ` James Morris
2010-11-15 22:36 ` Linus Torvalds
2010-11-15 22:51 ` James Morris
2010-11-14 2:44 ` Kees Cook
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