Change mmap_sem lock to write for writing to vma in enclave_create. Signed-off-by: Angie Chinchilla <angie.v.chinchilla(a)intel.com&gt;

--- drivers/platform/x86/intel_sgx/sgx_ioctl.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/platform/x86/intel_sgx/sgx_ioctl.c b/drivers/platform/x86/intel_sgx/sgx_ioctl.c index 1f2a269..85770ae 100644 --- a/drivers/platform/x86/intel_sgx/sgx_ioctl.c +++ b/drivers/platform/x86/intel_sgx/sgx_ioctl.c @@ -524,17 +524,17 @@ static long sgx_ioc_enclave_create(struct file *filep, unsigned int cmd, goto out; } - down_read(&current->mm->mmap_sem); + down_write(&current->mm->mmap_sem); vma = find_vma(current->mm, secs->base); if (!vma || vma->vm_ops != &sgx_vm_ops || vma->vm_start != secs->base || vma->vm_end != (secs->base + secs->size)) { ret = -EINVAL; - up_read(&current->mm->mmap_sem); + up_write(&current->mm->mmap_sem); goto out; } vma->vm_private_data = encl; - up_read(&current->mm->mmap_sem); + up_write(&current->mm->mmap_sem); mutex_lock(&sgx_tgid_ctx_mutex); list_add_tail(&encl->encl_list, &encl->tgid_ctx->encl_list); -- 2.7.4 _______________________________________________ intel-sgx-kernel-dev mailing list intel-sgx-kernel-dev(a)lists.01.org https://lists.01.org/mailman/listinfo/intel-sgx-kernel-dev