From: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
To: linux-ia64@vger.kernel.org
Subject: [PATCH] mca_drv: Add minstate validation
Date: Thu, 09 Feb 2006 06:43:05 +0000 [thread overview]
Message-ID: <43EAE479.4050606@jp.fujitsu.com> (raw)
MCA driver can cause panic if kernel gets a state info with no minstate.
This patch adds minstate validation before handling it.
signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
-----
arch/ia64/kernel/mca_drv.c | 3 +++
1 files changed, 3 insertions(+)
Index: linux-2.6.16-rc2/arch/ia64/kernel/mca_drv.c
=================================--- linux-2.6.16-rc2.orig/arch/ia64/kernel/mca_drv.c 2006-02-08 13:03:49.000000000 +0900
+++ linux-2.6.16-rc2/arch/ia64/kernel/mca_drv.c 2006-02-08 15:24:09.000000000 +0900
@@ -437,6 +437,9 @@
* the process not have any locks of kernel.
*/
+ /* Is minstate valid? */
+ if (!peidx_bottom(peidx) || !(peidx_bottom(peidx)->valid.minstate))
+ return 0;
psr1 =(struct ia64_psr *)&(peidx_minstate_area(peidx)->pmsa_ipsr);
/*
reply other threads:[~2006-02-09 6:43 UTC|newest]
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