From: Alexander Wuerstlein <arw@arw.name>
To: linux-kernel@vger.kernel.org
Cc: Alexander Wuerstlein <arw@arw.name>,
Johannes Schlumberger <spjsschl@stud.informatik.uni-erlangen.de>
Subject: [PATCH] sns: add syscall to check signed state of a process [4/4]
Date: Fri, 22 Jun 2007 20:25:29 +0200 [thread overview]
Message-ID: <11825367293600-git-send-email-arw@arw.name> (raw)
In-Reply-To: <20070621155516.GA6838@faui01.informatik.uni-erlangen.de>
Makes it possible for a userspace process to ask for the trustworthiness of
another process.
Signed-off-by: Johannes Schlumberger <spjsschl@cip.informatik.uni-erlangen.de>
---
arch/i386/kernel/syscall_table.S | 1 +
include/asm-i386/unistd.h | 3 ++-
security/sns.c | 15 +++++++++++++++
3 files changed, 18 insertions(+), 1 deletions(-)
diff --git a/arch/i386/kernel/syscall_table.S b/arch/i386/kernel/syscall_table.S
index bf6adce..e8ba35a 100644
--- a/arch/i386/kernel/syscall_table.S
+++ b/arch/i386/kernel/syscall_table.S
@@ -323,3 +323,4 @@ ENTRY(sys_call_table)
.long sys_signalfd
.long sys_timerfd
.long sys_eventfd
+ .long sys_sns_is_trusted /* 320 */
diff --git a/include/asm-i386/unistd.h b/include/asm-i386/unistd.h
index e84ace1..3f8df3e 100644
--- a/include/asm-i386/unistd.h
+++ b/include/asm-i386/unistd.h
@@ -329,10 +329,11 @@
#define __NR_signalfd 321
#define __NR_timerfd 322
#define __NR_eventfd 323
+#define __NR_sns_is_trusted 324
#ifdef __KERNEL__
-#define NR_syscalls 324
+#define NR_syscalls 325
#define __ARCH_WANT_IPC_PARSE_VERSION
#define __ARCH_WANT_OLD_READDIR
diff --git a/security/sns.c b/security/sns.c
index 3192a90..1978f7c 100644
--- a/security/sns.c
+++ b/security/sns.c
@@ -112,3 +112,18 @@ int sns_signature_valid(struct file *file)
crypto_free_hash(tfm);
return ret;
}
+
+asmlinkage int sys_sns_is_trusted(pid_t p)
+{
+ struct task_struct *t;
+ rcu_read_lock();
+ t = find_task_by_pid(p);
+ if (IS_ERR(t)) {
+ rcu_read_unlock();
+ return -EINVAL;
+ }
+ p = t->sns_valid_sig; /*locking needed*/
+ rcu_read_unlock();
+ return p;
+}
+EXPORT_SYMBOL_GPL(sys_sns_is_trusted);
--
1.5.2.1
next prev parent reply other threads:[~2007-06-22 18:26 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-06-21 15:55 [PATCH] signed binaries support [0/4] Johannes Schlumberger
2007-06-21 16:17 ` Adrian Bunk
2007-06-21 16:29 ` Alexander Wuerstlein
2007-06-21 17:23 ` Adrian Bunk
2007-06-21 17:34 ` Alexander Wuerstlein
2007-06-21 18:05 ` Adrian Bunk
2007-06-21 18:21 ` Johannes Schlumberger
2007-06-22 18:25 ` [PATCH] export xattr_resolve_name_sns [1/4] Alexander Wuerstlein
2007-06-22 18:25 ` [PATCH] Check files' signatures before doing suid/sgid [2/4] Alexander Wuerstlein
2007-06-22 19:36 ` Satyam Sharma
2007-06-24 22:58 ` Alexander Wuerstlein
2007-06-25 23:53 ` Satyam Sharma
2007-06-26 0:27 ` Alexander Wuerstlein
2007-06-26 2:13 ` Satyam Sharma
2007-06-23 17:54 ` Jan Engelhardt
2007-06-22 18:25 ` [PATCH] sns: check related executable memory of binaries [3/4] Alexander Wuerstlein
2007-06-22 18:25 ` Alexander Wuerstlein [this message]
2007-06-21 16:02 [PATCH] sns: add syscall to check signed state of a process [4/4] Alexander Wuerstlein
2007-06-21 16:34 ` Akinobu Mita
2007-06-21 16:49 ` Alexander Wuerstlein
2007-06-23 18:03 ` Jan Engelhardt
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