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| author | Yann Droneaud <ydroneaud@opteya.com> | 2014-03-10 23:06:26 +0100 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2014-04-30 16:23:24 +0100 |
| commit | 44a524016c91bf52c52abc2dc7ab4c2262e98dac (patch) | |
| tree | e8159b26f7dc1e92effc20ad282a1fad7c0f8f3a | |
| parent | 38c4a0153b2bad3280768787bf2a3cf349e59bc8 (diff) | |
| download | linux-stable-44a524016c91bf52c52abc2dc7ab4c2262e98dac.tar.gz linux-stable-44a524016c91bf52c52abc2dc7ab4c2262e98dac.tar.bz2 linux-stable-44a524016c91bf52c52abc2dc7ab4c2262e98dac.zip | |
IB/mthca: Return an error on ib_copy_to_udata() failure
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: Ben Hutchings <ben@decadent.org.uk>
| -rw-r--r-- | drivers/infiniband/hw/mthca/mthca_provider.c | 1 |
1 files changed, 1 insertions, 0 deletions
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; } |