[ARM] 5027/1: Fixed random memory corruption on pxa suspend cycle.
Each time a pxa type cpu went in suspend, a portion of
kmalloc memory was corrupted.
The issue was an incorrect length allocation introduced by
the commit 711be5ccfe9a02ba560aa918a008c31ea4760163 for
the save registers array (=> overflow).
Signed-off-by: Robert Jarzmik <rjarzmik@free.fr>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mach-pxa/pm.c b/arch/arm/mach-pxa/pm.c
index ec1bbf3..329df21 100644
--- a/arch/arm/mach-pxa/pm.c
+++ b/arch/arm/mach-pxa/pm.c
@@ -42,7 +42,7 @@
if (state != PM_SUSPEND_STANDBY) {
pxa_cpu_pm_fns->save(sleep_save);
/* before sleeping, calculate and save a checksum */
- for (i = 0; i < pxa_cpu_pm_fns->save_size - 1; i++)
+ for (i = 0; i < pxa_cpu_pm_fns->save_count - 1; i++)
sleep_save_checksum += sleep_save[i];
}
@@ -55,7 +55,7 @@
if (state != PM_SUSPEND_STANDBY) {
/* after sleeping, validate the checksum */
- for (i = 0; i < pxa_cpu_pm_fns->save_size - 1; i++)
+ for (i = 0; i < pxa_cpu_pm_fns->save_count - 1; i++)
checksum += sleep_save[i];
/* if invalid, display message and wait for a hardware reset */
@@ -101,7 +101,8 @@
return -EINVAL;
}
- sleep_save = kmalloc(pxa_cpu_pm_fns->save_size, GFP_KERNEL);
+ sleep_save = kmalloc(pxa_cpu_pm_fns->save_count * sizeof(unsigned long),
+ GFP_KERNEL);
if (!sleep_save) {
printk(KERN_ERR "failed to alloc memory for pm save\n");
return -ENOMEM;