[PATCH 6.12 077/567] net: hns3: add VLAN id validation before using

Greg Kroah-Hartman
2026-01-06T17:18:27Z

From: Jian Shen <shenjian15@huawei.com>

[ Upstream commit 6ef935e65902bfed53980ad2754b06a284ea8ac1 ]

Currently, the VLAN id may be used without validation when
receive a VLAN configuration mailbox from VF. The length of
vlan_del_fail_bmap is BITS_TO_LONGS(VLAN_N_VID). It may cause
out-of-bounds memory access once the VLAN id is bigger than
or equal to VLAN_N_VID.

Therefore, VLAN id needs to be checked to ensure it is within
the range of VLAN_N_VID.

Fixes: fe4144d47eef ("net: hns3: sync VLAN filter entries when kill VLAN ID failed")
Signed-off-by: Jian Shen <shenjian15@huawei.com>
Signed-off-by: Jijie Shao <shaojijie@huawei.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20251211023737.2327018-4-shaojijie@huawei.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
index f5eafd1ded413..8dd970ef02ac6 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
@@ -10572,6 +10572,9 @@ int hclge_set_vlan_filter(struct hnae3_handle *handle, __be16 proto,
bool writen_to_tbl = false;
int ret = 0;

+ if (vlan_id >= VLAN_N_VID)
+ return -EINVAL;
+
/* When device is resetting or reset failed, firmware is unable to
* handle mailbox. Just record the vlan id, and remove it after
* reset finished.
--
2.51.0