diff options
Diffstat (limited to 'drivers/misc/lkdtm.c')
| -rw-r--r-- | drivers/misc/lkdtm.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/misc/lkdtm.c b/drivers/misc/lkdtm.c index 8e00e2e992d1..c333e813ed34 100644 --- a/drivers/misc/lkdtm.c +++ b/drivers/misc/lkdtm.c @@ -107,6 +107,7 @@ enum ctype { CT_ACCESS_USERSPACE, CT_WRITE_RO, CT_WRITE_KERN, + CT_WRAP_ATOMIC }; static char* cp_name[] = { @@ -147,6 +148,7 @@ static char* cp_type[] = { "ACCESS_USERSPACE", "WRITE_RO", "WRITE_KERN", + "WRAP_ATOMIC" }; static struct jprobe lkdtm; @@ -620,6 +622,17 @@ static void lkdtm_do_action(enum ctype which) do_overwritten(); break; } + case CT_WRAP_ATOMIC: { + atomic_t under = ATOMIC_INIT(INT_MIN); + atomic_t over = ATOMIC_INIT(INT_MAX); + + pr_info("attempting atomic underflow\n"); + atomic_dec(&under); + pr_info("attempting atomic overflow\n"); + atomic_inc(&over); + + return; + } case CT_NONE: default: break; |