mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-21 03:33:59 +08:00
6d2e91a662
When building under W=1, the lack of lkdtm.h in lkdtm_usercopy.c and lkdtm_rodata.c was discovered. This fixes the issue and consolidates the common header and the pr_fmt macro for simplicity and regularity across each test source file. Signed-off-by: Kees Cook <keescook@chromium.org>
149 lines
2.8 KiB
C
149 lines
2.8 KiB
C
/*
|
|
* This is for all the tests related to logic bugs (e.g. bad dereferences,
|
|
* bad alignment, bad loops, bad locking, bad scheduling, deep stacks, and
|
|
* lockups) along with other things that don't fit well into existing LKDTM
|
|
* test source files.
|
|
*/
|
|
#include "lkdtm.h"
|
|
#include <linux/sched.h>
|
|
|
|
/*
|
|
* Make sure our attempts to over run the kernel stack doesn't trigger
|
|
* a compiler warning when CONFIG_FRAME_WARN is set. Then make sure we
|
|
* recurse past the end of THREAD_SIZE by default.
|
|
*/
|
|
#if defined(CONFIG_FRAME_WARN) && (CONFIG_FRAME_WARN > 0)
|
|
#define REC_STACK_SIZE (CONFIG_FRAME_WARN / 2)
|
|
#else
|
|
#define REC_STACK_SIZE (THREAD_SIZE / 8)
|
|
#endif
|
|
#define REC_NUM_DEFAULT ((THREAD_SIZE / REC_STACK_SIZE) * 2)
|
|
|
|
static int recur_count = REC_NUM_DEFAULT;
|
|
|
|
static DEFINE_SPINLOCK(lock_me_up);
|
|
|
|
static int recursive_loop(int remaining)
|
|
{
|
|
char buf[REC_STACK_SIZE];
|
|
|
|
/* Make sure compiler does not optimize this away. */
|
|
memset(buf, (remaining & 0xff) | 0x1, REC_STACK_SIZE);
|
|
if (!remaining)
|
|
return 0;
|
|
else
|
|
return recursive_loop(remaining - 1);
|
|
}
|
|
|
|
/* If the depth is negative, use the default, otherwise keep parameter. */
|
|
void __init lkdtm_bugs_init(int *recur_param)
|
|
{
|
|
if (*recur_param < 0)
|
|
*recur_param = recur_count;
|
|
else
|
|
recur_count = *recur_param;
|
|
}
|
|
|
|
void lkdtm_PANIC(void)
|
|
{
|
|
panic("dumptest");
|
|
}
|
|
|
|
void lkdtm_BUG(void)
|
|
{
|
|
BUG();
|
|
}
|
|
|
|
void lkdtm_WARNING(void)
|
|
{
|
|
WARN_ON(1);
|
|
}
|
|
|
|
void lkdtm_EXCEPTION(void)
|
|
{
|
|
*((int *) 0) = 0;
|
|
}
|
|
|
|
void lkdtm_LOOP(void)
|
|
{
|
|
for (;;)
|
|
;
|
|
}
|
|
|
|
void lkdtm_OVERFLOW(void)
|
|
{
|
|
(void) recursive_loop(recur_count);
|
|
}
|
|
|
|
noinline void lkdtm_CORRUPT_STACK(void)
|
|
{
|
|
/* Use default char array length that triggers stack protection. */
|
|
char data[8];
|
|
|
|
memset((void *)data, 0, 64);
|
|
}
|
|
|
|
void lkdtm_UNALIGNED_LOAD_STORE_WRITE(void)
|
|
{
|
|
static u8 data[5] __attribute__((aligned(4))) = {1, 2, 3, 4, 5};
|
|
u32 *p;
|
|
u32 val = 0x12345678;
|
|
|
|
p = (u32 *)(data + 1);
|
|
if (*p == 0)
|
|
val = 0x87654321;
|
|
*p = val;
|
|
}
|
|
|
|
void lkdtm_SOFTLOCKUP(void)
|
|
{
|
|
preempt_disable();
|
|
for (;;)
|
|
cpu_relax();
|
|
}
|
|
|
|
void lkdtm_HARDLOCKUP(void)
|
|
{
|
|
local_irq_disable();
|
|
for (;;)
|
|
cpu_relax();
|
|
}
|
|
|
|
void lkdtm_SPINLOCKUP(void)
|
|
{
|
|
/* Must be called twice to trigger. */
|
|
spin_lock(&lock_me_up);
|
|
/* Let sparse know we intended to exit holding the lock. */
|
|
__release(&lock_me_up);
|
|
}
|
|
|
|
void lkdtm_HUNG_TASK(void)
|
|
{
|
|
set_current_state(TASK_UNINTERRUPTIBLE);
|
|
schedule();
|
|
}
|
|
|
|
void lkdtm_ATOMIC_UNDERFLOW(void)
|
|
{
|
|
atomic_t under = ATOMIC_INIT(INT_MIN);
|
|
|
|
pr_info("attempting good atomic increment\n");
|
|
atomic_inc(&under);
|
|
atomic_dec(&under);
|
|
|
|
pr_info("attempting bad atomic underflow\n");
|
|
atomic_dec(&under);
|
|
}
|
|
|
|
void lkdtm_ATOMIC_OVERFLOW(void)
|
|
{
|
|
atomic_t over = ATOMIC_INIT(INT_MAX);
|
|
|
|
pr_info("attempting good atomic decrement\n");
|
|
atomic_dec(&over);
|
|
atomic_inc(&over);
|
|
|
|
pr_info("attempting bad atomic overflow\n");
|
|
atomic_inc(&over);
|
|
}
|