| Message ID | 20200714145456.1380987-1-yangyingliang@huawei.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | [stable-4.19] IB/umem: fix reference count leak in ib_umem_odp_get() | expand |
diff --git a/drivers/infiniband/core/umem_odp.c b/drivers/infiniband/core/umem_odp.c index eeafdc0beec7..08ef654ea9b8 100644 --- a/drivers/infiniband/core/umem_odp.c +++ b/drivers/infiniband/core/umem_odp.c @@ -347,7 +347,8 @@ int ib_umem_odp_get(struct ib_ucontext *context, struct ib_umem *umem, 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);
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> --- drivers/infiniband/core/umem_odp.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)