diff options
Diffstat (limited to 'drivers/misc/lkdtm/usercopy.c')
| -rw-r--r-- | drivers/misc/lkdtm/usercopy.c | 15 |
1 files changed, 0 insertions, 15 deletions
diff --git a/drivers/misc/lkdtm/usercopy.c b/drivers/misc/lkdtm/usercopy.c index b833367a45d0..109e8d4302c1 100644 --- a/drivers/misc/lkdtm/usercopy.c +++ b/drivers/misc/lkdtm/usercopy.c @@ -325,21 +325,6 @@ free_user: vm_munmap(user_addr, PAGE_SIZE); } -void lkdtm_USERCOPY_KERNEL_DS(void) -{ - char __user *user_ptr = - (char __user *)(0xFUL << (sizeof(unsigned long) * 8 - 4)); - mm_segment_t old_fs = get_fs(); - char buf[10] = {0}; - - pr_info("attempting copy_to_user() to noncanonical address: %px\n", - user_ptr); - set_fs(KERNEL_DS); - if (copy_to_user(user_ptr, buf, sizeof(buf)) == 0) - pr_err("copy_to_user() to noncanonical address succeeded!?\n"); - set_fs(old_fs); -} - void __init lkdtm_usercopy_init(void) { /* Prepare cache that lacks SLAB_USERCOPY flag. */ |