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authorDmitry Antipov <dmantipov@yandex.ru>2023-06-21 12:36:55 +0300
committerKalle Valo <quic_kvalo@quicinc.com>2023-07-27 19:12:49 +0300
commit1ad8237e971630c66a1a6194491e0837b64d00e0 (patch)
treee40b03c0338c0a2963704664ec4df407b8f4823c
parent061115fbfb2ce5870c9a004d68dc63138c07c782 (diff)
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wifi: wil6210: fix fortify warnings
When compiling with gcc 13.1 and CONFIG_FORTIFY_SOURCE=y, I've noticed the following: In function ‘fortify_memcpy_chk’, inlined from ‘wil_rx_crypto_check_edma’ at drivers/net/wireless/ath/wil6210/txrx_edma.c:566:2: ./include/linux/fortify-string.h:529:25: warning: call to ‘__read_overflow2_field’ declared with attribute warning: detected read beyond size of field (2nd parameter); maybe use struct_group()? [-Wattribute-warning] 529 | __read_overflow2_field(q_size_field, size); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ where the compiler complains on: const u8 *pn; ... pn = (u8 *)&st->ext.pn_15_0; ... memcpy(cc->pn, pn, IEEE80211_GCMP_PN_LEN); and: In function ‘fortify_memcpy_chk’, inlined from ‘wil_rx_crypto_check’ at drivers/net/wireless/ath/wil6210/txrx.c:684:2: ./include/linux/fortify-string.h:529:25: warning: call to ‘__read_overflow2_field’ declared with attribute warning: detected read beyond size of field (2nd parameter); maybe use struct_group()? [-Wattribute-warning] 529 | __read_overflow2_field(q_size_field, size); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ where the compiler complains on: const u8 *pn = (u8 *)&d->mac.pn_15_0; ... memcpy(cc->pn, pn, IEEE80211_GCMP_PN_LEN); In both cases, the fortification logic interprets 'memcpy()' as 6-byte overread of 2-byte field 'pn_15_0' of 'struct wil_rx_status_extension' and 'pn_15_0' of 'struct vring_rx_mac', respectively. To silence these warnings, last two fields of the aforementioned structures are grouped using 'struct_group_attr(pn, __packed' quirk. Signed-off-by: Dmitry Antipov <dmantipov@yandex.ru> Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com> Link: https://lore.kernel.org/r/20230621093711.80118-1-dmantipov@yandex.ru
-rw-r--r--drivers/net/wireless/ath/wil6210/txrx.c2
-rw-r--r--drivers/net/wireless/ath/wil6210/txrx.h6
-rw-r--r--drivers/net/wireless/ath/wil6210/txrx_edma.c2
-rw-r--r--drivers/net/wireless/ath/wil6210/txrx_edma.h6
4 files changed, 10 insertions, 6 deletions
diff --git a/drivers/net/wireless/ath/wil6210/txrx.c b/drivers/net/wireless/ath/wil6210/txrx.c
index 237cbd5c5060..f29ac6de7139 100644
--- a/drivers/net/wireless/ath/wil6210/txrx.c
+++ b/drivers/net/wireless/ath/wil6210/txrx.c
@@ -666,7 +666,7 @@ static int wil_rx_crypto_check(struct wil6210_priv *wil, struct sk_buff *skb)
struct wil_tid_crypto_rx *c = mc ? &s->group_crypto_rx :
&s->tid_crypto_rx[tid];
struct wil_tid_crypto_rx_single *cc = &c->key_id[key_id];
- const u8 *pn = (u8 *)&d->mac.pn_15_0;
+ const u8 *pn = (u8 *)&d->mac.pn;
if (!cc->key_set) {
wil_err_ratelimited(wil,
diff --git a/drivers/net/wireless/ath/wil6210/txrx.h b/drivers/net/wireless/ath/wil6210/txrx.h
index 1ae1bec1b97f..689f68d89a44 100644
--- a/drivers/net/wireless/ath/wil6210/txrx.h
+++ b/drivers/net/wireless/ath/wil6210/txrx.h
@@ -343,8 +343,10 @@ struct vring_rx_mac {
u32 d0;
u32 d1;
u16 w4;
- u16 pn_15_0;
- u32 pn_47_16;
+ struct_group_attr(pn, __packed,
+ u16 pn_15_0;
+ u32 pn_47_16;
+ );
} __packed;
/* Rx descriptor - DMA part
diff --git a/drivers/net/wireless/ath/wil6210/txrx_edma.c b/drivers/net/wireless/ath/wil6210/txrx_edma.c
index 201c8c35e0c9..1ba1f21ebea2 100644
--- a/drivers/net/wireless/ath/wil6210/txrx_edma.c
+++ b/drivers/net/wireless/ath/wil6210/txrx_edma.c
@@ -548,7 +548,7 @@ static int wil_rx_crypto_check_edma(struct wil6210_priv *wil,
s = &wil->sta[cid];
c = mc ? &s->group_crypto_rx : &s->tid_crypto_rx[tid];
cc = &c->key_id[key_id];
- pn = (u8 *)&st->ext.pn_15_0;
+ pn = (u8 *)&st->ext.pn;
if (!cc->key_set) {
wil_err_ratelimited(wil,
diff --git a/drivers/net/wireless/ath/wil6210/txrx_edma.h b/drivers/net/wireless/ath/wil6210/txrx_edma.h
index c736f7413a35..ee90e225bb05 100644
--- a/drivers/net/wireless/ath/wil6210/txrx_edma.h
+++ b/drivers/net/wireless/ath/wil6210/txrx_edma.h
@@ -330,8 +330,10 @@ struct wil_rx_status_extension {
u32 d0;
u32 d1;
__le16 seq_num; /* only lower 12 bits */
- u16 pn_15_0;
- u32 pn_47_16;
+ struct_group_attr(pn, __packed,
+ u16 pn_15_0;
+ u32 pn_47_16;
+ );
} __packed;
struct wil_rx_status_extended {