diff options
Diffstat (limited to 'drivers/misc/lkdtm_bugs.c')
| -rw-r--r-- | drivers/misc/lkdtm_bugs.c | 83 |
1 files changed, 0 insertions, 83 deletions
diff --git a/drivers/misc/lkdtm_bugs.c b/drivers/misc/lkdtm_bugs.c index d9028ef50fbe..ef3d06f901fc 100644 --- a/drivers/misc/lkdtm_bugs.c +++ b/drivers/misc/lkdtm_bugs.c @@ -6,7 +6,6 @@ */ #include "lkdtm.h" #include <linux/list.h> -#include <linux/refcount.h> #include <linux/sched.h> #include <linux/sched/signal.h> #include <linux/uaccess.h> @@ -137,88 +136,6 @@ void lkdtm_HUNG_TASK(void) schedule(); } -void lkdtm_REFCOUNT_SATURATE_INC(void) -{ - refcount_t over = REFCOUNT_INIT(UINT_MAX - 1); - - pr_info("attempting good refcount decrement\n"); - refcount_dec(&over); - refcount_inc(&over); - - pr_info("attempting bad refcount inc overflow\n"); - refcount_inc(&over); - refcount_inc(&over); - if (refcount_read(&over) == UINT_MAX) - pr_err("Correctly stayed saturated, but no BUG?!\n"); - else - pr_err("Fail: refcount wrapped\n"); -} - -void lkdtm_REFCOUNT_SATURATE_ADD(void) -{ - refcount_t over = REFCOUNT_INIT(UINT_MAX - 1); - - pr_info("attempting good refcount decrement\n"); - refcount_dec(&over); - refcount_inc(&over); - - pr_info("attempting bad refcount add overflow\n"); - refcount_add(2, &over); - if (refcount_read(&over) == UINT_MAX) - pr_err("Correctly stayed saturated, but no BUG?!\n"); - else - pr_err("Fail: refcount wrapped\n"); -} - -void lkdtm_REFCOUNT_ZERO_DEC(void) -{ - refcount_t zero = REFCOUNT_INIT(1); - - pr_info("attempting bad refcount decrement to zero\n"); - refcount_dec(&zero); - if (refcount_read(&zero) == 0) - pr_err("Stayed at zero, but no BUG?!\n"); - else - pr_err("Fail: refcount went crazy\n"); -} - -void lkdtm_REFCOUNT_ZERO_SUB(void) -{ - refcount_t zero = REFCOUNT_INIT(1); - - pr_info("attempting bad refcount subtract past zero\n"); - if (!refcount_sub_and_test(2, &zero)) - pr_info("wrap attempt was noticed\n"); - if (refcount_read(&zero) == 1) - pr_err("Correctly stayed above 0, but no BUG?!\n"); - else - pr_err("Fail: refcount wrapped\n"); -} - -void lkdtm_REFCOUNT_ZERO_INC(void) -{ - refcount_t zero = REFCOUNT_INIT(0); - - pr_info("attempting bad refcount increment from zero\n"); - refcount_inc(&zero); - if (refcount_read(&zero) == 0) - pr_err("Stayed at zero, but no BUG?!\n"); - else - pr_err("Fail: refcount went past zero\n"); -} - -void lkdtm_REFCOUNT_ZERO_ADD(void) -{ - refcount_t zero = REFCOUNT_INIT(0); - - pr_info("attempting bad refcount addition from zero\n"); - refcount_add(2, &zero); - if (refcount_read(&zero) == 0) - pr_err("Stayed at zero, but no BUG?!\n"); - else - pr_err("Fail: refcount went past zero\n"); -} - void lkdtm_CORRUPT_LIST_ADD(void) { /* |