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-rw-r--r--mm/usercopy.c16
1 files changed, 4 insertions, 12 deletions
diff --git a/mm/usercopy.c b/mm/usercopy.c
index 5d34c40c16c2..2c235d5c2364 100644
--- a/mm/usercopy.c
+++ b/mm/usercopy.c
@@ -81,17 +81,6 @@ static noinline int check_stack_object(const void *obj, unsigned long len)
* kmem_cache_create_usercopy() function to create the cache (and
* carefully audit the whitelist range).
*/
-void usercopy_warn(const char *name, const char *detail, bool to_user,
- unsigned long offset, unsigned long len)
-{
- WARN_ONCE(1, "Bad or missing usercopy whitelist? Kernel memory %s attempt detected %s %s%s%s%s (offset %lu, size %lu)!\n",
- to_user ? "exposure" : "overwrite",
- to_user ? "from" : "to",
- name ? : "unknown?!",
- detail ? " '" : "", detail ? : "", detail ? "'" : "",
- offset, len);
-}
-
void __noreturn usercopy_abort(const char *name, const char *detail,
bool to_user, unsigned long offset,
unsigned long len)
@@ -314,7 +303,10 @@ static bool enable_checks __initdata = true;
static int __init parse_hardened_usercopy(char *str)
{
- return strtobool(str, &enable_checks);
+ if (strtobool(str, &enable_checks))
+ pr_warn("Invalid option string for hardened_usercopy: '%s'\n",
+ str);
+ return 1;
}
__setup("hardened_usercopy=", parse_hardened_usercopy);