diff options
Diffstat (limited to 'arch/x86/lib/usercopy.c')
| -rw-r--r-- | arch/x86/lib/usercopy.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/x86/lib/usercopy.c b/arch/x86/lib/usercopy.c index 97be9cb54483..4f74d94c8d97 100644 --- a/arch/x86/lib/usercopy.c +++ b/arch/x86/lib/usercopy.c @@ -7,6 +7,9 @@ #include <linux/highmem.h> #include <linux/module.h> +#include <asm/word-at-a-time.h> +#include <linux/sched.h> + /* * best effort, GUP based copy_from_user() that is NMI-safe */ @@ -19,6 +22,9 @@ copy_from_user_nmi(void *to, const void __user *from, unsigned long n) void *map; int ret; + if (__range_not_ok(from, n, TASK_SIZE)) + return len; + do { ret = __get_user_pages_fast(addr, 1, 0, &page); if (!ret) |