diff options
| author | Xuan Zhuo <xuanzhuo@linux.alibaba.com> | 2024-06-06 13:13:45 +0200 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2024-07-04 17:00:31 +0200 |
| commit | 840b2d39a2dc1b96deb3f5c7fef76c9b24f08f51 (patch) | |
| tree | e365c1c69fc1098c4ad23d891659b2d18ca3bc8c /drivers/virtio | |
| parent | vhost/vsock: always initialize seqpacket_allow (diff) | |
| download | linux-840b2d39a2dc1b96deb3f5c7fef76c9b24f08f51.tar.xz linux-840b2d39a2dc1b96deb3f5c7fef76c9b24f08f51.zip | |
virtio_ring: fix KMSAN error for premapped mode
Add kmsan for virtqueue_dma_map_single_attrs to fix:
BUG: KMSAN: uninit-value in receive_buf+0x45ca/0x6990
receive_buf+0x45ca/0x6990
virtnet_poll+0x17e0/0x3130
net_rx_action+0x832/0x26e0
handle_softirqs+0x330/0x10f0
[...]
Uninit was created at:
__alloc_pages_noprof+0x62a/0xe60
alloc_pages_noprof+0x392/0x830
skb_page_frag_refill+0x21a/0x5c0
virtnet_rq_alloc+0x50/0x1500
try_fill_recv+0x372/0x54c0
virtnet_open+0x210/0xbe0
__dev_open+0x56e/0x920
__dev_change_flags+0x39c/0x2000
dev_change_flags+0xaa/0x200
do_setlink+0x197a/0x7420
rtnl_setlink+0x77c/0x860
[...]
Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Tested-by: Alexander Potapenko <glider@google.com>
Message-Id: <20240606111345.93600-1-xuanzhuo@linux.alibaba.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Tested-by: Ilya Leoshkevich <iii@linux.ibm.com> # s390x
Acked-by: Jason Wang <jasowang@redhat.com>
Diffstat (limited to 'drivers/virtio')
| -rw-r--r-- | drivers/virtio/virtio_ring.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index 2a972752ff1b..9d3a9942c8c8 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -3121,8 +3121,10 @@ dma_addr_t virtqueue_dma_map_single_attrs(struct virtqueue *_vq, void *ptr, { struct vring_virtqueue *vq = to_vvq(_vq); - if (!vq->use_dma_api) + if (!vq->use_dma_api) { + kmsan_handle_dma(virt_to_page(ptr), offset_in_page(ptr), size, dir); return (dma_addr_t)virt_to_phys(ptr); + } return dma_map_single_attrs(vring_dma_dev(vq), ptr, size, dir, attrs); } |