50 lines
1.7 KiB
Diff
50 lines
1.7 KiB
Diff
From f85d0fc3975bb20a6cdbbef21408f3d8d00e2a3f Mon Sep 17 00:00:00 2001
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From: David Marchand <david.marchand@redhat.com>
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Date: Wed, 18 May 2022 12:16:54 +0200
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Subject: [PATCH] vdpa/ifc: fix build with GCC 12
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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[ upstream commit 2a213b794fdd255fde7581a7c9bd034ab39e9b6a ]
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GCC 12 raises the following warning:
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../drivers/vdpa/ifc/ifcvf_vdpa.c: In function ‘vdpa_enable_vfio_intr’:
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../drivers/vdpa/ifc/ifcvf_vdpa.c:383:62: error: writing 4 bytes into a
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region of size 0 [-Werror=stringop-overflow=]
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383 | fd_ptr[RTE_INTR_VEC_RXTX_OFFSET + i] = fd;
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| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~
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../drivers/vdpa/ifc/ifcvf_vdpa.c:348:14: note: at offset 32 into
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destination object ‘irq_set_buf’ of size 32
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348 | char irq_set_buf[MSIX_IRQ_SET_BUF_LEN];
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| ^~~~~~~~~~~
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Validate number of vrings to avoid out of bound access.
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Bugzilla ID: 855
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Signed-off-by: David Marchand <david.marchand@redhat.com>
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Acked-by: Xiao Wang <xiao.w.wang@intel.com>
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Acked-by: Stephen Hemminger <stephen@networkplumber.org>
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---
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drivers/vdpa/ifc/ifcvf_vdpa.c | 2 ++
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1 file changed, 2 insertions(+)
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diff --git a/drivers/vdpa/ifc/ifcvf_vdpa.c b/drivers/vdpa/ifc/ifcvf_vdpa.c
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index 3853c4cf7e..6a915b0d5e 100644
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--- a/drivers/vdpa/ifc/ifcvf_vdpa.c
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+++ b/drivers/vdpa/ifc/ifcvf_vdpa.c
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@@ -356,6 +356,8 @@ vdpa_enable_vfio_intr(struct ifcvf_internal *internal, bool m_rx)
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vring.callfd = -1;
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nr_vring = rte_vhost_get_vring_num(internal->vid);
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+ if (nr_vring > IFCVF_MAX_QUEUES * 2)
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+ return -1;
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irq_set = (struct vfio_irq_set *)irq_set_buf;
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irq_set->argsz = sizeof(irq_set_buf);
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--
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2.23.0
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