[PATCH 4.9 124/177] net: hns: fix ethtool_get_strings overflow in hns driver
From: Greg Kroah-Hartman
Date: Fri Mar 23 2018 - 06:10:41 EST
4.9-stable review patch. If anyone has any objections, please let me know.
------------------
From: Timmy Li <lixiaoping3@xxxxxxxxxx>
[ Upstream commit 412b65d15a7f8a93794653968308fc100f2aa87c ]
hns_get_sset_count() returns HNS_NET_STATS_CNT and the data space allocated
is not enough for ethtool_get_strings(), which will cause random memory
corruption.
When SLAB and DEBUG_SLAB are both enabled, memory corruptions like the
the following can be observed without this patch:
[ 43.115200] Slab corruption (Not tainted): Acpi-ParseExt start=ffff801fb0b69030, len=80
[ 43.115206] Redzone: 0x9f911029d006462/0x5f78745f31657070.
[ 43.115208] Last user: [<5f7272655f746b70>](0x5f7272655f746b70)
[ 43.115214] 010: 70 70 65 31 5f 74 78 5f 70 6b 74 00 6b 6b 6b 6b ppe1_tx_pkt.kkkk
[ 43.115217] 030: 70 70 65 31 5f 74 78 5f 70 6b 74 5f 6f 6b 00 6b ppe1_tx_pkt_ok.k
[ 43.115218] Next obj: start=ffff801fb0b69098, len=80
[ 43.115220] Redzone: 0x706d655f6f666966/0x9f911029d74e35b.
[ 43.115229] Last user: [<ffff0000084b11b0>](acpi_os_release_object+0x28/0x38)
[ 43.115231] 000: 74 79 00 6b 6b 6b 6b 6b 70 70 65 31 5f 74 78 5f ty.kkkkkppe1_tx_
[ 43.115232] 010: 70 6b 74 5f 65 72 72 5f 63 73 75 6d 5f 66 61 69 pkt_err_csum_fai
Signed-off-by: Timmy Li <lixiaoping3@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/ethernet/hisilicon/hns/hns_dsaf_gmac.c | 2 +-
drivers/net/ethernet/hisilicon/hns/hns_dsaf_ppe.c | 2 +-
drivers/net/ethernet/hisilicon/hns/hns_dsaf_rcb.c | 2 +-
drivers/net/ethernet/hisilicon/hns/hns_dsaf_xgmac.c | 2 +-
4 files changed, 4 insertions(+), 4 deletions(-)
--- a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_gmac.c
+++ b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_gmac.c
@@ -671,7 +671,7 @@ static void hns_gmac_get_strings(u32 str
static int hns_gmac_get_sset_count(int stringset)
{
- if (stringset == ETH_SS_STATS)
+ if (stringset == ETH_SS_STATS || stringset == ETH_SS_PRIV_FLAGS)
return ARRAY_SIZE(g_gmac_stats_string);
return 0;
--- a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_ppe.c
+++ b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_ppe.c
@@ -422,7 +422,7 @@ void hns_ppe_update_stats(struct hns_ppe
int hns_ppe_get_sset_count(int stringset)
{
- if (stringset == ETH_SS_STATS)
+ if (stringset == ETH_SS_STATS || stringset == ETH_SS_PRIV_FLAGS)
return ETH_PPE_STATIC_NUM;
return 0;
}
--- a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_rcb.c
+++ b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_rcb.c
@@ -798,7 +798,7 @@ void hns_rcb_get_stats(struct hnae_queue
*/
int hns_rcb_get_ring_sset_count(int stringset)
{
- if (stringset == ETH_SS_STATS)
+ if (stringset == ETH_SS_STATS || stringset == ETH_SS_PRIV_FLAGS)
return HNS_RING_STATIC_REG_NUM;
return 0;
--- a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_xgmac.c
+++ b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_xgmac.c
@@ -776,7 +776,7 @@ static void hns_xgmac_get_strings(u32 st
*/
static int hns_xgmac_get_sset_count(int stringset)
{
- if (stringset == ETH_SS_STATS)
+ if (stringset == ETH_SS_STATS || stringset == ETH_SS_PRIV_FLAGS)
return ARRAY_SIZE(g_xgmac_stats_string);
return 0;