user_auxv[AT_VECTOR_SIZE - 1] = AT_NULL;
}
- if (prctl_map.exe_fd != (u32)-1)
+ if (prctl_map.exe_fd != (u32)-1) {
error = prctl_set_mm_exe_file(mm, prctl_map.exe_fd);
- down_read(&mm->mmap_sem);
- if (error)
- goto out;
+ if (error)
+ return error;
+ }
+
+ down_write(&mm->mmap_sem);
/*
* We don't validate if these members are pointing to
if (prctl_map.auxv_size)
memcpy(mm->saved_auxv, user_auxv, sizeof(user_auxv));
- error = 0;
-out:
- up_read(&mm->mmap_sem);
- return error;
+ up_write(&mm->mmap_sem);
+ return 0;
}
#endif /* CONFIG_CHECKPOINT_RESTORE */
error = -EINVAL;
- down_read(&mm->mmap_sem);
+ down_write(&mm->mmap_sem);
vma = find_vma(mm, addr);
prctl_map.start_code = mm->start_code;
error = 0;
out:
- up_read(&mm->mmap_sem);
+ up_write(&mm->mmap_sem);
return error;
}
pgoff = vma->vm_pgoff + ((start - vma->vm_start) >> PAGE_SHIFT);
*prev = vma_merge(mm, *prev, start, end, vma->vm_flags, vma->anon_vma,
vma->vm_file, pgoff, vma_policy(vma),
- name_addr);
+ vma->vm_userfaultfd_ctx, name_addr);
if (*prev) {
vma = *prev;
goto success;
error = perf_event_task_enable();
break;
case PR_GET_TIMERSLACK:
- error = current->timer_slack_ns;
+ if (current->timer_slack_ns > ULONG_MAX)
+ error = ULONG_MAX;
+ else
+ error = current->timer_slack_ns;
break;
case PR_SET_TIMERSLACK:
if (arg2 <= 0)