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| author | Marcel Ziswiler <marcel.ziswiler@toradex.com> | 2020-05-21 00:54:36 +0200 |
|---|---|---|
| committer | Marcel Ziswiler <marcel.ziswiler@toradex.com> | 2020-05-21 00:54:36 +0200 |
| commit | 135d39dcedcedd1f44ea0bba52f15ac5922c114f (patch) | |
| tree | 12379fc8ef7489eaca1c7245f8bd6af74c619a8f /drivers/misc/lkdtm_perms.c | |
| parent | 187764bd111b27783b6d68ffb3b3dbb3a9bafd38 (diff) | |
| parent | 1279cd128bba968ebe0a2df7f7ae38bae90250ef (diff) | |
Merge remote-tracking branch 'remotes/fslc/4.9-2.3.x-imx' into toradex_4.9-2.3.x-imx-next
Conflicts:
sound/soc/codecs/sgtl5000.c
sound/soc/fsl/imx-sgtl5000.c
Diffstat (limited to 'drivers/misc/lkdtm_perms.c')
| -rw-r--r-- | drivers/misc/lkdtm_perms.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/misc/lkdtm_perms.c b/drivers/misc/lkdtm_perms.c index 45f1c0f96612..1a9dcdaa95f0 100644 --- a/drivers/misc/lkdtm_perms.c +++ b/drivers/misc/lkdtm_perms.c @@ -160,6 +160,11 @@ void lkdtm_EXEC_USERSPACE(void) vm_munmap(user_addr, PAGE_SIZE); } +void lkdtm_EXEC_NULL(void) +{ + execute_location(NULL, CODE_AS_IS); +} + void lkdtm_ACCESS_USERSPACE(void) { unsigned long user_addr, tmp = 0; @@ -191,6 +196,19 @@ void lkdtm_ACCESS_USERSPACE(void) vm_munmap(user_addr, PAGE_SIZE); } +void lkdtm_ACCESS_NULL(void) +{ + unsigned long tmp; + unsigned long *ptr = (unsigned long *)NULL; + + pr_info("attempting bad read at %px\n", ptr); + tmp = *ptr; + tmp += 0xc0dec0de; + + pr_info("attempting bad write at %px\n", ptr); + *ptr = tmp; +} + void __init lkdtm_perms_init(void) { /* Make sure we can write to __ro_after_init values during __init */ |