diff options
Diffstat (limited to 'tools/virtio/linux/uaccess.h')
| -rw-r--r-- | tools/virtio/linux/uaccess.h | 12 |
1 files changed, 3 insertions, 9 deletions
diff --git a/tools/virtio/linux/uaccess.h b/tools/virtio/linux/uaccess.h index fa05d01b2c90..f13828e0c409 100644 --- a/tools/virtio/linux/uaccess.h +++ b/tools/virtio/linux/uaccess.h @@ -1,3 +1,4 @@ +/* SPDX-License-Identifier: GPL-2.0 */ #ifndef UACCESS_H #define UACCESS_H @@ -5,15 +6,10 @@ extern void *__user_addr_min, *__user_addr_max; -static inline void __chk_user_ptr(const volatile void *p, size_t size) -{ - assert(p >= __user_addr_min && p + size <= __user_addr_max); -} - #define put_user(x, ptr) \ ({ \ typeof(ptr) __pu_ptr = (ptr); \ - __chk_user_ptr(__pu_ptr, sizeof(*__pu_ptr)); \ + __chk_user_ptr(__pu_ptr); \ WRITE_ONCE(*(__pu_ptr), x); \ 0; \ }) @@ -21,7 +17,7 @@ static inline void __chk_user_ptr(const volatile void *p, size_t size) #define get_user(x, ptr) \ ({ \ typeof(ptr) __pu_ptr = (ptr); \ - __chk_user_ptr(__pu_ptr, sizeof(*__pu_ptr)); \ + __chk_user_ptr(__pu_ptr); \ x = READ_ONCE(*(__pu_ptr)); \ 0; \ }) @@ -36,7 +32,6 @@ static void volatile_memcpy(volatile char *to, const volatile char *from, static inline int copy_from_user(void *to, const void __user volatile *from, unsigned long n) { - __chk_user_ptr(from, n); volatile_memcpy(to, from, n); return 0; } @@ -44,7 +39,6 @@ static inline int copy_from_user(void *to, const void __user volatile *from, static inline int copy_to_user(void __user volatile *to, const void *from, unsigned long n) { - __chk_user_ptr(to, n); volatile_memcpy(to, from, n); return 0; } |