diff options
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/compat.h | 35 | ||||
| -rw-r--r-- | include/linux/uaccess.h | 1 |
2 files changed, 36 insertions, 0 deletions
diff --git a/include/linux/compat.h b/include/linux/compat.h index f0d2dd35d408..acac0b571df1 100644 --- a/include/linux/compat.h +++ b/include/linux/compat.h @@ -467,6 +467,34 @@ put_compat_sigset(compat_sigset_t __user *compat, const sigset_t *set, unsafe_put_user(__s->sig[0], &__c->sig[0], label); \ } \ } while (0) + +#define unsafe_get_compat_sigset(set, compat, label) do { \ + const compat_sigset_t __user *__c = compat; \ + compat_sigset_word hi, lo; \ + sigset_t *__s = set; \ + \ + switch (_NSIG_WORDS) { \ + case 4: \ + unsafe_get_user(lo, &__c->sig[7], label); \ + unsafe_get_user(hi, &__c->sig[6], label); \ + __s->sig[3] = hi | (((long)lo) << 32); \ + fallthrough; \ + case 3: \ + unsafe_get_user(lo, &__c->sig[5], label); \ + unsafe_get_user(hi, &__c->sig[4], label); \ + __s->sig[2] = hi | (((long)lo) << 32); \ + fallthrough; \ + case 2: \ + unsafe_get_user(lo, &__c->sig[3], label); \ + unsafe_get_user(hi, &__c->sig[2], label); \ + __s->sig[1] = hi | (((long)lo) << 32); \ + fallthrough; \ + case 1: \ + unsafe_get_user(lo, &__c->sig[1], label); \ + unsafe_get_user(hi, &__c->sig[0], label); \ + __s->sig[0] = hi | (((long)lo) << 32); \ + } \ +} while (0) #else #define unsafe_put_compat_sigset(compat, set, label) do { \ compat_sigset_t __user *__c = compat; \ @@ -474,6 +502,13 @@ put_compat_sigset(compat_sigset_t __user *compat, const sigset_t *set, \ unsafe_copy_to_user(__c, __s, sizeof(*__c), label); \ } while (0) + +#define unsafe_get_compat_sigset(set, compat, label) do { \ + const compat_sigset_t __user *__c = compat; \ + sigset_t *__s = set; \ + \ + unsafe_copy_from_user(__s, __c, sizeof(*__c), label); \ +} while (0) #endif extern int compat_ptrace_request(struct task_struct *child, diff --git a/include/linux/uaccess.h b/include/linux/uaccess.h index c7c6e8b8344d..c05e903cef02 100644 --- a/include/linux/uaccess.h +++ b/include/linux/uaccess.h @@ -397,6 +397,7 @@ long strnlen_user_nofault(const void __user *unsafe_addr, long count); #define unsafe_get_user(x,p,e) unsafe_op_wrap(__get_user(x,p),e) #define unsafe_put_user(x,p,e) unsafe_op_wrap(__put_user(x,p),e) #define unsafe_copy_to_user(d,s,l,e) unsafe_op_wrap(__copy_to_user(d,s,l),e) +#define unsafe_copy_from_user(d,s,l,e) unsafe_op_wrap(__copy_from_user(d,s,l),e) static inline unsigned long user_access_save(void) { return 0UL; } static inline void user_access_restore(unsigned long flags) { } #endif |