queue-4.19/ib-hfi1-validate-page-aligned-for-a-given-virtual-ad.patch

   1 From 55878a234aca3d92db568618f43d7859b1155f2a Mon Sep 17 00:00:00 2001
   2 From: Kamenee Arumugam <kamenee.arumugam@intel.com>
   3 Date: Fri, 24 May 2019 11:45:04 -0400
   4 Subject: IB/hfi1: Validate page aligned for a given virtual address
   5
   6 [ Upstream commit 97736f36dbebf2cda2799db3b54717ba5b388255 ]
   7
   8 User applications can register memory regions for TID buffers that are not
   9 aligned on page boundaries. Hfi1 is expected to pin those pages in memory
  10 and cache the pages with mmu_rb. The rb tree will fail to insert pages
  11 that are not aligned correctly.
  12
  13 Validate whether a given virtual address is page aligned before pinning.
  14
  15 Fixes: 7e7a436ecb6e ("staging/hfi1: Add TID entry program function body")
  16 Reviewed-by: Michael J. Ruhl <michael.j.ruhl@intel.com>
  17 Signed-off-by: Kamenee Arumugam <kamenee.arumugam@intel.com>
  18 Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
  19 Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
  20 Signed-off-by: Sasha Levin <sashal@kernel.org>
  21 ---
  22  drivers/infiniband/hw/hfi1/user_exp_rcv.c | 3 +++
  23  1 file changed, 3 insertions(+)
  24
  25 diff --git a/drivers/infiniband/hw/hfi1/user_exp_rcv.c b/drivers/infiniband/hw/hfi1/user_exp_rcv.c
  26 index dbe7d14a5c76..4e986ca4dd35 100644
  27 --- a/drivers/infiniband/hw/hfi1/user_exp_rcv.c
  28 +++ b/drivers/infiniband/hw/hfi1/user_exp_rcv.c
  29 @@ -324,6 +324,9 @@ int hfi1_user_exp_rcv_setup(struct hfi1_filedata *fd,
  30         u32 *tidlist = NULL;
  31         struct tid_user_buf *tidbuf;
  32
  33 +       if (!PAGE_ALIGNED(tinfo->vaddr))
  34 +               return -EINVAL;
  35 +
  36         tidbuf = kzalloc(sizeof(*tidbuf), GFP_KERNEL);
  37         if (!tidbuf)
  38                 return -ENOMEM;
  39 --
  40 2.20.1
  41