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path: root/drivers/misc/lkdtm/usercopy.c
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Diffstat (limited to 'drivers/misc/lkdtm/usercopy.c')
-rw-r--r--drivers/misc/lkdtm/usercopy.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/misc/lkdtm/usercopy.c b/drivers/misc/lkdtm/usercopy.c
index e172719dd86d..b833367a45d0 100644
--- a/drivers/misc/lkdtm/usercopy.c
+++ b/drivers/misc/lkdtm/usercopy.c
@@ -304,19 +304,22 @@ void lkdtm_USERCOPY_KERNEL(void)
return;
}
- pr_info("attempting good copy_to_user from kernel rodata\n");
+ pr_info("attempting good copy_to_user from kernel rodata: %px\n",
+ test_text);
if (copy_to_user((void __user *)user_addr, test_text,
unconst + sizeof(test_text))) {
pr_warn("copy_to_user failed unexpectedly?!\n");
goto free_user;
}
- pr_info("attempting bad copy_to_user from kernel text\n");
+ pr_info("attempting bad copy_to_user from kernel text: %px\n",
+ vm_mmap);
if (copy_to_user((void __user *)user_addr, vm_mmap,
unconst + PAGE_SIZE)) {
pr_warn("copy_to_user failed, but lacked Oops\n");
goto free_user;
}
+ pr_err("FAIL: survived bad copy_to_user()\n");
free_user:
vm_munmap(user_addr, PAGE_SIZE);