((unsigned long)ptr & 7))
return -EFAULT;
- if (!__get_user_inatomic(*ret, ptr))
+ pagefault_disable();
+ if (!__get_user_inatomic(*ret, ptr)) {
+ pagefault_enable();
return 0;
+ }
+ pagefault_enable();
return read_user_stack_slow(ptr, ret, 8);
}
((unsigned long)ptr & 3))
return -EFAULT;
- if (!__get_user_inatomic(*ret, ptr))
+ pagefault_disable();
+ if (!__get_user_inatomic(*ret, ptr)) {
+ pagefault_enable();
return 0;
+ }
+ pagefault_enable();
return read_user_stack_slow(ptr, ret, 4);
}
*/
static int read_user_stack_32(unsigned int __user *ptr, unsigned int *ret)
{
+ int rc;
+
if ((unsigned long)ptr > TASK_SIZE - sizeof(unsigned int) ||
((unsigned long)ptr & 3))
return -EFAULT;
- return __get_user_inatomic(*ret, ptr);
+ pagefault_disable();
+ rc = __get_user_inatomic(*ret, ptr);
+ pagefault_enable();
+
+ return rc;
}
static inline void perf_callchain_user_64(struct perf_callchain_entry *entry,