From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Farhan Ali <alifm@linux.ibm.com>,
Eric Farman <farman@linux.ibm.com>,
Cornelia Huck <cohuck@redhat.com>,
Sasha Levin <sashal@kernel.org>,
linux-s390@vger.kernel.org, kvm@vger.kernel.org
Subject: [PATCH AUTOSEL 4.14 02/30] vfio-ccw: Set pa_nr to 0 if memory allocation fails for pa_iova_pfn
Date: Fri, 2 Aug 2019 09:23:54 -0400 [thread overview]
Message-ID: <20190802132422.13963-2-sashal@kernel.org> (raw)
In-Reply-To: <20190802132422.13963-1-sashal@kernel.org>
From: Farhan Ali <alifm@linux.ibm.com>
[ Upstream commit c1ab69268d124ebdbb3864580808188ccd3ea355 ]
So we don't call try to call vfio_unpin_pages() incorrectly.
Fixes: 0a19e61e6d4c ("vfio: ccw: introduce channel program interfaces")
Signed-off-by: Farhan Ali <alifm@linux.ibm.com>
Reviewed-by: Eric Farman <farman@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Message-Id: <33a89467ad6369196ae6edf820cbcb1e2d8d050c.1562854091.git.alifm@linux.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/s390/cio/vfio_ccw_cp.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/s390/cio/vfio_ccw_cp.c b/drivers/s390/cio/vfio_ccw_cp.c
index 1419eaea03d84..5a9e457caef33 100644
--- a/drivers/s390/cio/vfio_ccw_cp.c
+++ b/drivers/s390/cio/vfio_ccw_cp.c
@@ -119,8 +119,10 @@ static int pfn_array_alloc_pin(struct pfn_array *pa, struct device *mdev,
sizeof(*pa->pa_iova_pfn) +
sizeof(*pa->pa_pfn),
GFP_KERNEL);
- if (unlikely(!pa->pa_iova_pfn))
+ if (unlikely(!pa->pa_iova_pfn)) {
+ pa->pa_nr = 0;
return -ENOMEM;
+ }
pa->pa_pfn = pa->pa_iova_pfn + pa->pa_nr;
ret = pfn_array_pin(pa, mdev);
--
2.20.1
parent reply other threads:[~2019-08-02 13:30 UTC|newest]
Thread overview: expand[flat|nested] mbox.gz Atom feed
[parent not found: <20190802132422.13963-1-sashal@kernel.org>]
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