vhost: fix offset while mmaping log base address

QEMU always set offset to 0 but for sanity we should take the offset
into account.

Fixes: 54f9e32305d4 ("vhost: handle dirty pages logging request")
Cc: stable@dpdk.org
Signed-off-by: Pawel Wodkowski <pawelx.wodkowski@intel.com>
Signed-off-by: Tomasz Kulasek <tomaszx.kulasek@intel.com>
Reviewed-by: Jianfeng Tan <jianfeng.tan@intel.com>
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>

diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
index 8ec51c9..d34fdc8 100644 (file)
--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c
@@ -1044,7 +1044,7 @@ vhost_user_set_log_base(struct virtio_net *dev, struct VhostUserMsg *msg)
         * mmap from 0 to workaround a hugepage mmap bug: mmap will
         * fail when offset is not page size aligned.
         */
-       addr = mmap(0, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
+       addr = mmap(0, size + off, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
        close(fd);
        if (addr == MAP_FAILED) {
                RTE_LOG(ERR, VHOST_CONFIG, "mmap log base failed!\n");