| From | Luis Henriques <> | Subject | [PATCH 3.11 111/182] IB/mthca: Return an error on ib_copy_to_udata() failure | Date | Thu, 24 Apr 2014 09:50:36 +0100 |
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3.11.10.9 -stable review patch. If anyone has any objections, please let me know.
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From: Yann Droneaud <ydroneaud@opteya.com>
commit 08e74c4b00c30c232d535ff368554959403d0432 upstream.
In case of error when writing to userspace, the function mthca_create_cq() does not set an error code before following its error path.
This patch sets the error code to -EFAULT when ib_copy_to_udata() fails.
This was caught when using spatch (aka. coccinelle) to rewrite call to ib_copy_{from,to}_udata().
Link: https://www.gitorious.org/opteya/coccib/source/75ebf2c1033c64c1d81df13e4ae44ee99c989eba:ib_copy_udata.cocci Link: http://marc.info/?i=cover.1394485254.git.ydroneaud@opteya.com Signed-off-by: Yann Droneaud <ydroneaud@opteya.com> Signed-off-by: Roland Dreier <roland@purestorage.com> Signed-off-by: Luis Henriques <luis.henriques@canonical.com> --- drivers/infiniband/hw/mthca/mthca_provider.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/drivers/infiniband/hw/mthca/mthca_provider.c b/drivers/infiniband/hw/mthca/mthca_provider.c index 5b71d43..42dde06 100644 --- a/drivers/infiniband/hw/mthca/mthca_provider.c +++ b/drivers/infiniband/hw/mthca/mthca_provider.c @@ -695,6 +695,7 @@ static struct ib_cq *mthca_create_cq(struct ib_device *ibdev, int entries, if (context && ib_copy_to_udata(udata, &cq->cqn, sizeof (__u32))) { mthca_free_cq(to_mdev(ibdev), cq); + err = -EFAULT; goto err_free; } -- 1.9.1
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