[PATCH AUTOSEL 4.9 04/14] net: hns: fix length and page_offset overflow when CONFIG_ARM64_64K_PAGES

From: Sasha Levin
Date: Wed Sep 19 2018 - 22:51:54 EST


From: Huazhong Tan <tanhuazhong@xxxxxxxxxx>

[ Upstream commit 3ed614dce3ca9912d22be215ff0f11104b69fe62 ]

When enable the config item "CONFIG_ARM64_64K_PAGES", the size of PAGE_SIZE
is 65536(64K). But the type of length and page_offset are u16, they will
overflow. So change them to u32.

Fixes: 6fe6611ff275 ("net: add Hisilicon Network Subsystem hnae framework support")
Signed-off-by: Huazhong Tan <tanhuazhong@xxxxxxxxxx>
Signed-off-by: Salil Mehta <salil.mehta@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
---
drivers/net/ethernet/hisilicon/hns/hnae.h | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/hisilicon/hns/hnae.h b/drivers/net/ethernet/hisilicon/hns/hnae.h
index e093cbf26c8c..f9d68453c81d 100644
--- a/drivers/net/ethernet/hisilicon/hns/hnae.h
+++ b/drivers/net/ethernet/hisilicon/hns/hnae.h
@@ -213,10 +213,10 @@ struct hnae_desc_cb {

/* priv data for the desc, e.g. skb when use with ip stack*/
void *priv;
- u16 page_offset;
- u16 reuse_flag;
+ u32 page_offset;
+ u32 length; /* length of the buffer */

- u16 length; /* length of the buffer */
+ u16 reuse_flag;

/* desc type, used by the ring user to mark the type of the priv data */
u16 type;
--
2.17.1