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| author | Lin Ma <linma@zju.edu.cn> | 2023-07-27 20:57:52 +0300 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2023-08-10 22:24:28 +0300 |
| commit | 5d6ba607d6cb5c58a4ddf33381e18c83dbb4098f (patch) | |
| tree | ef03a12dcc12dfece62d64bdbd63bfd8b5f3c010 /drivers/vdpa | |
| parent | b3003e1b54e057f5f3124e437b80c3bef26ed3fe (diff) | |
| download | linux-5d6ba607d6cb5c58a4ddf33381e18c83dbb4098f.tar.xz | |
vdpa: Add max vqp attr to vdpa_nl_policy for nlattr length check
The vdpa_nl_policy structure is used to validate the nlattr when parsing
the incoming nlmsg. It will ensure the attribute being described produces
a valid nlattr pointer in info->attrs before entering into each handler
in vdpa_nl_ops.
That is to say, the missing part in vdpa_nl_policy may lead to illegal
nlattr after parsing, which could lead to OOB read just like CVE-2023-3773.
This patch adds the missing nla_policy for vdpa max vqp attr to avoid
such bugs.
Fixes: ad69dd0bf26b ("vdpa: Introduce query of device config layout")
Signed-off-by: Lin Ma <linma@zju.edu.cn>
Cc: stable@vger.kernel.org
Message-Id: <20230727175757.73988-7-dtatulea@nvidia.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'drivers/vdpa')
| -rw-r--r-- | drivers/vdpa/vdpa.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/vdpa/vdpa.c b/drivers/vdpa/vdpa.c index 75f1df2b9d2a..f2f654fd84e5 100644 --- a/drivers/vdpa/vdpa.c +++ b/drivers/vdpa/vdpa.c @@ -1247,6 +1247,7 @@ static const struct nla_policy vdpa_nl_policy[VDPA_ATTR_MAX + 1] = { [VDPA_ATTR_MGMTDEV_DEV_NAME] = { .type = NLA_STRING }, [VDPA_ATTR_DEV_NAME] = { .type = NLA_STRING }, [VDPA_ATTR_DEV_NET_CFG_MACADDR] = NLA_POLICY_ETH_ADDR, + [VDPA_ATTR_DEV_NET_CFG_MAX_VQP] = { .type = NLA_U16 }, /* virtio spec 1.1 section 5.1.4.1 for valid MTU range */ [VDPA_ATTR_DEV_NET_CFG_MTU] = NLA_POLICY_MIN(NLA_U16, 68), [VDPA_ATTR_DEV_QUEUE_INDEX] = { .type = NLA_U32 }, |