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RDMA/addr: Be strict with gid size

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[ Upstream commit d1c803a9ccd7bd3aff5e989ccfb39ed3b799b975 ]

The nla_len() is less than or equal to 16.  If it's less than 16 then end
of the "gid" buffer is uninitialized.

Fixes: ae43f82867 ("IB/core: Add IP to GID netlink offload")
Link: https://lore.kernel.org/r/20210405074434.264221-1-leon@kernel.org
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Mark Bloch <mbloch@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Leon Romanovsky 2021-04-05 10:44:34 +03:00 committed by Greg Kroah-Hartman
parent e53ff6e591
commit 5700c3d4ab
1 changed files with 3 additions and 1 deletions
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4
drivers/infiniband/core/addr.c
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@ -76,7 +76,9 @@ static struct workqueue_struct *addr_wq;
static const struct nla_policy ib_nl_addr_policy[LS_NLA_TYPE_MAX] = {
[LS_NLA_TYPE_DGID] = {.type = NLA_BINARY,
.len = sizeof(struct rdma_nla_ls_gid)},
.len = sizeof(struct rdma_nla_ls_gid),
.validation_type = NLA_VALIDATE_MIN,
.min = sizeof(struct rdma_nla_ls_gid)},
};
static inline bool ib_nl_is_good_ip_resp(const struct nlmsghdr *nlh)