linux-kernel - [PATCH 2.6.32 40/38] security: add cred argument to security

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Date:	Mon, 30 Nov 2015 17:05:06 +0100
From:	Willy Tarreau <w@....eu>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	Chris Wright <chrisw@...s-sol.org>,
	Serge Hallyn <serge.hallyn@...onical.com>,
	James Morris <jmorris@...ei.org>, Willy Tarreau <w@....eu>
Subject: [PATCH 2.6.32 40/38] security: add cred argument to security_capable()

2.6.32-longterm review patch.  If anyone has any objections, please let me know.

------------------

From: Chris Wright <chrisw@...s-sol.org>

commit 6037b715d6fab139742c3df8851db4c823081561 upstream.

Expand security_capable() to include cred, so that it can be usable in a
wider range of call sites.

Signed-off-by: Chris Wright <chrisw@...s-sol.org>
Acked-by: Serge Hallyn <serge.hallyn@...onical.com>
Signed-off-by: James Morris <jmorris@...ei.org>
[wt: needed by next patch only]
Signed-off-by: Willy Tarreau <w@....eu>
---
 include/linux/security.h | 6 +++---
 kernel/capability.c      | 2 +-
 security/security.c      | 5 ++---
 3 files changed, 6 insertions(+), 7 deletions(-)

diff --git a/include/linux/security.h b/include/linux/security.h
index d40d23f..73ebc3f 100644
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -1733,7 +1733,7 @@ int security_capset(struct cred *new, const struct cred *old,
 		    const kernel_cap_t *effective,
 		    const kernel_cap_t *inheritable,
 		    const kernel_cap_t *permitted);
-int security_capable(int cap);
+int security_capable(const struct cred *cred, int cap);
 int security_real_capable(struct task_struct *tsk, int cap);
 int security_real_capable_noaudit(struct task_struct *tsk, int cap);
 int security_acct(struct file *file);
@@ -1938,9 +1938,9 @@ static inline int security_capset(struct cred *new,
 	return cap_capset(new, old, effective, inheritable, permitted);
 }
 
-static inline int security_capable(int cap)
+static inline int security_capable(const struct cred *cred, int cap)
 {
-	return cap_capable(current, current_cred(), cap, SECURITY_CAP_AUDIT);
+	return cap_capable(current, cred, cap, SECURITY_CAP_AUDIT);
 }
 
 static inline int security_real_capable(struct task_struct *tsk, int cap)
diff --git a/kernel/capability.c b/kernel/capability.c
index 8a944f5..771618c 100644
--- a/kernel/capability.c
+++ b/kernel/capability.c
@@ -305,7 +305,7 @@ int capable(int cap)
 		BUG();
 	}
 
-	if (security_capable(cap) == 0) {
+	if (security_capable(current_cred(), cap) == 0) {
 		current->flags |= PF_SUPERPRIV;
 		return 1;
 	}
diff --git a/security/security.c b/security/security.c
index c4c6732..227b173 100644
--- a/security/security.c
+++ b/security/security.c
@@ -151,10 +151,9 @@ int security_capset(struct cred *new, const struct cred *old,
 				    effective, inheritable, permitted);
 }
 
-int security_capable(int cap)
+int security_capable(const struct cred *cred, int cap)
 {
-	return security_ops->capable(current, current_cred(), cap,
-				     SECURITY_CAP_AUDIT);
+	return security_ops->capable(current, cred, cap, SECURITY_CAP_AUDIT);
 }
 
 int security_real_capable(struct task_struct *tsk, int cap)
-- 
1.7.12.2.21.g234cd45.dirty





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