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| author | Dan Carpenter <dan.carpenter@oracle.com> | 2020-04-06 17:45:52 +0300 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2020-08-10 10:38:55 -0400 |
| commit | cf16fe9243bfa2863491026fc727618c7c593c84 (patch) | |
| tree | 307e7504e850eb89fca913611f87b5d3fd81a125 /drivers/vdpa/vdpa_sim | |
| parent | 2874211fcdb751e2962d68cdb9783fa1ff8eb340 (diff) | |
| download | linux-stable-cf16fe9243bfa2863491026fc727618c7c593c84.tar.gz linux-stable-cf16fe9243bfa2863491026fc727618c7c593c84.tar.bz2 linux-stable-cf16fe9243bfa2863491026fc727618c7c593c84.zip | |
vdpa: Fix pointer math bug in vdpasim_get_config()
If "offset" is non-zero then we end up copying from beyond the end of
the config because of pointer math. We can fix this by casting the
struct to a u8 pointer.
Fixes: 2c53d0f64c06 ("vdpasim: vDPA device simulator")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/20200406144552.GF68494@mwanda
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Diffstat (limited to 'drivers/vdpa/vdpa_sim')
| -rw-r--r-- | drivers/vdpa/vdpa_sim/vdpa_sim.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c b/drivers/vdpa/vdpa_sim/vdpa_sim.c index 604d9d25ca47..62d640327145 100644 --- a/drivers/vdpa/vdpa_sim/vdpa_sim.c +++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c @@ -558,7 +558,7 @@ static void vdpasim_get_config(struct vdpa_device *vdpa, unsigned int offset, struct vdpasim *vdpasim = vdpa_to_sim(vdpa); if (offset + len < sizeof(struct virtio_net_config)) - memcpy(buf, &vdpasim->config + offset, len); + memcpy(buf, (u8 *)&vdpasim->config + offset, len); } static void vdpasim_set_config(struct vdpa_device *vdpa, unsigned int offset, |