From: Yang Yingliang yangyingliang@huawei.com
Add missing mmput() on error path to avoid ref-count leak.
This problem is introduced by 79bb5b7ee177 ("RDMA/umem: Fix missing mmap_sem in get umem ODP call") and resolved by f27a0d50a4bc ("RDMA/umem: Use umem->owning_mm inside ODP"). So, it's only needed in stable-4.14 and stable-4.19.
Fixes: 79bb5b7ee177 ("RDMA/umem: Fix missing mmap_sem in get umem ODP call") Signed-off-by: Yang Yingliang yangyingliang@huawei.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/infiniband/core/umem_odp.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/infiniband/core/umem_odp.c +++ b/drivers/infiniband/core/umem_odp.c @@ -306,7 +306,8 @@ int ib_umem_odp_get(struct ib_ucontext * vma = find_vma(mm, ib_umem_start(umem)); if (!vma || !is_vm_hugetlb_page(vma)) { up_read(&mm->mmap_sem); - return -EINVAL; + ret_val = -EINVAL; + goto out_mm; } h = hstate_vma(vma); umem->page_shift = huge_page_shift(h);