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[IA64] mca_drv: Add minstate validation
author
Hidetoshi Seto
<seto.hidetoshi@jp.fujitsu.com>
Thu, 9 Feb 2006 22:42:55 +0000
(14:42 -0800)
committer
Tony Luck
<tony.luck@intel.com>
Thu, 9 Feb 2006 22:42:55 +0000
(14:42 -0800)
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>
Signed-off-by: Tony Luck <tony.luck@intel.com>
arch/ia64/kernel/mca_drv.c
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diff --git
a/arch/ia64/kernel/mca_drv.c
b/arch/ia64/kernel/mca_drv.c
index
3492e32
..
8fd93af
100644
(file)
--- a/
arch/ia64/kernel/mca_drv.c
+++ b/
arch/ia64/kernel/mca_drv.c
@@
-437,6
+437,9
@@
recover_from_read_error(slidx_table_t *slidx,
* 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);
/*