This is a note to let you know that I've just added the patch titled
IB/mthca: Return an error on ib_copy_to_udata() failure
to the 3.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
ib-mthca-return-an-error-on-ib_copy_to_udata-failure.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 08e74c4b00c30c232d535ff368554959403d0432 Mon Sep 17 00:00:00 2001
From: Yann Droneaud <ydroneaud@xxxxxxxxxx>
Date: Mon, 10 Mar 2014 23:06:26 +0100
Subject: IB/mthca: Return an error on ib_copy_to_udata() failure
From: Yann Droneaud <ydroneaud@xxxxxxxxxx>
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@xxxxxxxxxx
Signed-off-by: Yann Droneaud <ydroneaud@xxxxxxxxxx>
Signed-off-by: Roland Dreier <roland@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/infiniband/hw/mthca/mthca_provider.c | 1 +
1 file changed, 1 insertion(+)
--- 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(str
if (context && ib_copy_to_udata(udata, &cq->cqn, sizeof (__u32))) {
mthca_free_cq(to_mdev(ibdev), cq);
+ err = -EFAULT;
goto err_free;
}
Patches currently in stable-queue which might be from ydroneaud@xxxxxxxxxx are
queue-3.4/ib-nes-return-an-error-on-ib_copy_from_udata-failure-instead-of-null.patch
queue-3.4/ib-mthca-return-an-error-on-ib_copy_to_udata-failure.patch
queue-3.4/ib-ehca-returns-an-error-on-ib_copy_to_udata-failure.patch
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