linux-kernel - [PATCH 06/59] CRED: Wrap task credential accesses in the x86 arch

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Message-ID: <20080827134613.19980.98963.stgit@warthog.procyon.org.uk>
Date:	Wed, 27 Aug 2008 14:46:13 +0100
From:	David Howells <dhowells@...hat.com>
To:	linux-kernel@...r.kernel.org
Cc:	linux-security-module@...r.kernel.org,
	David Howells <dhowells@...hat.com>,
	Serge Hallyn <serue@...ibm.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>
Subject: [PATCH 06/59] CRED: Wrap task credential accesses in the x86 arch

Wrap access to task credentials so that they can be separated more easily from
the task_struct during the introduction of COW creds.

Change most current->(|e|s|fs)[ug]id to current_(|e|s|fs)[ug]id().

Change some task->e?[ug]id to task_e?[ug]id().  In some places it makes more
sense to use RCU directly rather than a convenient wrapper; these will be
addressed by later patches.

Signed-off-by: David Howells <dhowells@...hat.com>
Reviewed-by: James Morris <jmorris@...ei.org>
Acked-by: Serge Hallyn <serue@...ibm.com>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: H. Peter Anvin <hpa@...or.com>
---

 arch/x86/mm/fault.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)


diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
index b9f367f..17d74be 100644
--- a/arch/x86/mm/fault.c
+++ b/arch/x86/mm/fault.c
@@ -395,7 +395,7 @@ static void show_fault_oops(struct pt_regs *regs, unsigned long error_code,
 		if (pte && pte_present(*pte) && !pte_exec(*pte))
 			printk(KERN_CRIT "kernel tried to execute "
 				"NX-protected page - exploit attempt? "
-				"(uid: %d)\n", current->uid);
+				"(uid: %d)\n", current_uid());
 	}
 #endif
 

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