Commit 412b65d1 authored by Timmy Li's avatar Timmy Li Committed by David S. Miller

net: hns: fix ethtool_get_strings overflow in hns driver

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: default avatarTimmy Li <lixiaoping3@huawei.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent a9f11f96
...@@ -666,7 +666,7 @@ static void hns_gmac_get_strings(u32 stringset, u8 *data) ...@@ -666,7 +666,7 @@ static void hns_gmac_get_strings(u32 stringset, u8 *data)
static int hns_gmac_get_sset_count(int stringset) 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 ARRAY_SIZE(g_gmac_stats_string);
return 0; return 0;
......
...@@ -422,7 +422,7 @@ void hns_ppe_update_stats(struct hns_ppe_cb *ppe_cb) ...@@ -422,7 +422,7 @@ void hns_ppe_update_stats(struct hns_ppe_cb *ppe_cb)
int hns_ppe_get_sset_count(int stringset) 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 ETH_PPE_STATIC_NUM;
return 0; return 0;
} }
......
...@@ -876,7 +876,7 @@ void hns_rcb_get_stats(struct hnae_queue *queue, u64 *data) ...@@ -876,7 +876,7 @@ void hns_rcb_get_stats(struct hnae_queue *queue, u64 *data)
*/ */
int hns_rcb_get_ring_sset_count(int stringset) 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 HNS_RING_STATIC_REG_NUM;
return 0; return 0;
......
...@@ -781,7 +781,7 @@ static void hns_xgmac_get_strings(u32 stringset, u8 *data) ...@@ -781,7 +781,7 @@ static void hns_xgmac_get_strings(u32 stringset, u8 *data)
*/ */
static int hns_xgmac_get_sset_count(int stringset) 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 ARRAY_SIZE(g_xgmac_stats_string);
return 0; return 0;
......
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