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RDMA/uverbs: Fix the check for port number

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commit 5a7a88f1b4 upstream.

The port number is only valid if IB_QP_PORT is set in the mask.
So only check port number if it is valid to prevent modify_qp from
failing due to an invalid port number.

Fixes: 5ecce4c9b17b("Check port number supplied by user verbs cmds")
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Mustafa Ismail <mustafa.ismail@intel.com>
Tested-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ismail, Mustafa
2017-07-14 09:41:30 -05:00
committed by Greg Kroah-Hartman
parent 62b5776c8c
commit 196553666d
1 changed files with 3 additions and 2 deletions
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5
drivers/infiniband/core/uverbs_cmd.c
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@@ -2342,8 +2342,9 @@ ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file,
if (copy_from_user(&cmd, buf, sizeof cmd))
return -EFAULT;
if (cmd.port_num < rdma_start_port(ib_dev) ||
cmd.port_num > rdma_end_port(ib_dev))
if ((cmd.attr_mask & IB_QP_PORT) &&
(cmd.port_num < rdma_start_port(ib_dev) ||
cmd.port_num > rdma_end_port(ib_dev)))
return -EINVAL;
INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,