ib_ucm_init_qp_attr() and ucma_init_qp_attr() pass struct ib_uverbs_qp_attr
with reserved, qp_state, {ah_attr,alt_ah_attr}{reserved,->grh.reserved}
fields uninitialized to copy_to_user(). It leads to leaking of contents of
kernel stack memory to userspace.
Signed-off-by: Vasiliy Kulikov <seg...@openwall.com>
---
Compile tested.
drivers/infiniband/core/uverbs_marshall.c | 4 ++++
1 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/drivers/infiniband/core/uverbs_marshall.c
b/drivers/infiniband/core/uverbs_marshall.c
index 5440da0..1b1146f 100644
--- a/drivers/infiniband/core/uverbs_marshall.c
+++ b/drivers/infiniband/core/uverbs_marshall.c
@@ -40,18 +40,21 @@ void ib_copy_ah_attr_to_user(struct ib_uverbs_ah_attr *dst,
dst->grh.sgid_index = src->grh.sgid_index;
dst->grh.hop_limit = src->grh.hop_limit;
dst->grh.traffic_class = src->grh.traffic_class;
+ memset(&dst->grh.reserved, 0, sizeof(dst->grh.reserved));
dst->dlid = src->dlid;
dst->sl = src->sl;
dst->src_path_bits = src->src_path_bits;
dst->static_rate = src->static_rate;
dst->is_global = src->ah_flags & IB_AH_GRH ? 1 : 0;
dst->port_num = src->port_num;
+ dst->reserved = 0;
}
EXPORT_SYMBOL(ib_copy_ah_attr_to_user);
void ib_copy_qp_attr_to_user(struct ib_uverbs_qp_attr *dst,
struct ib_qp_attr *src)
{
+ dst->qp_state = src->qp_state;
dst->cur_qp_state = src->cur_qp_state;
dst->path_mtu = src->path_mtu;
dst->path_mig_state = src->path_mig_state;
@@ -83,6 +86,7 @@ void ib_copy_qp_attr_to_user(struct ib_uverbs_qp_attr *dst,
dst->rnr_retry = src->rnr_retry;
dst->alt_port_num = src->alt_port_num;
dst->alt_timeout = src->alt_timeout;
+ memset(dst->reserved, 0, sizeof(dst->reserved));
}
EXPORT_SYMBOL(ib_copy_qp_attr_to_user);
--
1.7.0.4
--
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