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[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 711be5ccfe 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>
This commit is contained in:
Robert Jarzmik 2008-05-02 21:17:06 +01:00 committed by Russell King
parent c8df9a53e8
commit 649de51b88
6 changed files with 17 additions and 23 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
arch/arm/mach-pxa/pm.c
View File

@ -42,7 +42,7 @@ int pxa_pm_enter(suspend_state_t state)
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 @@ int pxa_pm_enter(suspend_state_t state)
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 @@ static int __init pxa_pm_init(void)
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;

8
arch/arm/mach-pxa/pxa25x.c
View File

@ -150,9 +150,7 @@ static struct clk pxa25x_clks[] = {
* More ones like CP and general purpose register values are preserved
* with the stack pointer in sleep.S.
*/
enum { SLEEP_SAVE_START = 0,
SLEEP_SAVE_PGSR0, SLEEP_SAVE_PGSR1, SLEEP_SAVE_PGSR2,
enum { SLEEP_SAVE_PGSR0, SLEEP_SAVE_PGSR1, SLEEP_SAVE_PGSR2,
SLEEP_SAVE_GAFR0_L, SLEEP_SAVE_GAFR0_U,
SLEEP_SAVE_GAFR1_L, SLEEP_SAVE_GAFR1_U,
@ -162,7 +160,7 @@ enum { SLEEP_SAVE_START = 0,
SLEEP_SAVE_CKEN,
SLEEP_SAVE_SIZE
SLEEP_SAVE_COUNT
};
@ -210,7 +208,7 @@ static void pxa25x_cpu_pm_enter(suspend_state_t state)
}
static struct pxa_cpu_pm_fns pxa25x_cpu_pm_fns = {
.save_size = SLEEP_SAVE_SIZE,
.save_count = SLEEP_SAVE_COUNT,
.valid = suspend_valid_only_mem,
.save = pxa25x_cpu_pm_save,
.restore = pxa25x_cpu_pm_restore,

8
arch/arm/mach-pxa/pxa27x.c
View File

@ -181,9 +181,7 @@ static struct clk pxa27x_clks[] = {
* More ones like CP and general purpose register values are preserved
* with the stack pointer in sleep.S.
*/
enum { SLEEP_SAVE_START = 0,
SLEEP_SAVE_PGSR0, SLEEP_SAVE_PGSR1, SLEEP_SAVE_PGSR2, SLEEP_SAVE_PGSR3,
enum { SLEEP_SAVE_PGSR0, SLEEP_SAVE_PGSR1, SLEEP_SAVE_PGSR2, SLEEP_SAVE_PGSR3,
SLEEP_SAVE_GAFR0_L, SLEEP_SAVE_GAFR0_U,
SLEEP_SAVE_GAFR1_L, SLEEP_SAVE_GAFR1_U,
@ -198,7 +196,7 @@ enum { SLEEP_SAVE_START = 0,
SLEEP_SAVE_PWER, SLEEP_SAVE_PCFR, SLEEP_SAVE_PRER,
SLEEP_SAVE_PFER, SLEEP_SAVE_PKWR,
SLEEP_SAVE_SIZE
SLEEP_SAVE_COUNT
};
void pxa27x_cpu_pm_save(unsigned long *sleep_save)
@ -269,7 +267,7 @@ static int pxa27x_cpu_pm_valid(suspend_state_t state)
}
static struct pxa_cpu_pm_fns pxa27x_cpu_pm_fns = {
.save_size = SLEEP_SAVE_SIZE,
.save_count = SLEEP_SAVE_COUNT,
.save = pxa27x_cpu_pm_save,
.restore = pxa27x_cpu_pm_restore,
.valid = pxa27x_cpu_pm_valid,

7
arch/arm/mach-pxa/pxa3xx.c
View File

@ -256,12 +256,11 @@ static unsigned long wakeup_src;
#define SAVE(x) sleep_save[SLEEP_SAVE_##x] = x
#define RESTORE(x) x = sleep_save[SLEEP_SAVE_##x]
enum { SLEEP_SAVE_START = 0,
SLEEP_SAVE_CKENA,
enum { SLEEP_SAVE_CKENA,
SLEEP_SAVE_CKENB,
SLEEP_SAVE_ACCR,
SLEEP_SAVE_SIZE,
SLEEP_SAVE_COUNT,
};
static void pxa3xx_cpu_pm_save(unsigned long *sleep_save)
@ -376,7 +375,7 @@ static int pxa3xx_cpu_pm_valid(suspend_state_t state)
}
static struct pxa_cpu_pm_fns pxa3xx_cpu_pm_fns = {
.save_size = SLEEP_SAVE_SIZE,
.save_count = SLEEP_SAVE_COUNT,
.save = pxa3xx_cpu_pm_save,
.restore = pxa3xx_cpu_pm_restore,
.valid = pxa3xx_cpu_pm_valid,

8
arch/arm/mach-sa1100/pm.c
View File

@ -43,20 +43,18 @@ extern void sa1100_cpu_resume(void);
* More ones like CP and general purpose register values are preserved
* on the stack and then the stack pointer is stored last in sleep.S.
*/
enum { SLEEP_SAVE_SP = 0,
SLEEP_SAVE_GPDR, SLEEP_SAVE_GAFR,
enum { SLEEP_SAVE_GPDR, SLEEP_SAVE_GAFR,
SLEEP_SAVE_PPDR, SLEEP_SAVE_PPSR, SLEEP_SAVE_PPAR, SLEEP_SAVE_PSDR,
SLEEP_SAVE_Ser1SDCR0,
SLEEP_SAVE_SIZE
SLEEP_SAVE_COUNT
};
static int sa11x0_pm_enter(suspend_state_t state)
{
unsigned long gpio, sleep_save[SLEEP_SAVE_SIZE];
unsigned long gpio, sleep_save[SLEEP_SAVE_COUNT];
gpio = GPLR;

2
include/asm-arm/arch-pxa/pm.h
View File

@ -10,7 +10,7 @@
#include <linux/suspend.h>
struct pxa_cpu_pm_fns {
int save_size;
int save_count;
void (*save)(unsigned long *);
void (*restore)(unsigned long *);
int (*valid)(suspend_state_t state);