In case of error when writing to userspace, function
mthca_create_cq() do not set an error code before
following its error path.
This patch set error code to -EFAULT when ib_copy_to_udata()
fail.
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@xxxxxxxxxx
Cc: Julia Lawall <julia.lawall@xxxxxxx>
Cc: cocci@xxxxxxxxxxxxxxx
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Yann Droneaud <ydroneaud@xxxxxxxxxx>
---
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 5b71d43bd89c..42dde06fdb91 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;
}
--
1.8.5.3
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