From: Arnd Bergmann <arnd@xxxxxxxx>
A previous patch addressed a fortified-memcpy warning on older compilers,
but there is still a warning on gcc-14 in some configurations:
In file included from include/linux/string.h:390,
from drivers/net/wireless/ath/ath12k/wow.c:7:
drivers/net/wireless/ath/ath12k/wow.c: In function 'ath12k_wow_convert_8023_to_80211.isra':
include/linux/fortify-string.h:114:33: error: '__builtin_memcpy' accessing 18446744073709551610 or more bytes at offsets 0 and 0 overlaps 9223372036854775797 bytes at offset -9223372036854775803 [-Werror=restrict]
include/linux/fortify-string.h:679:26: note: in expansion of macro '__fortify_memcpy_chk'
679 | #define memcpy(p, q, s) __fortify_memcpy_chk(p, q, s, \
| ^~~~~~~~~~~~~~~~~~~~
drivers/net/wireless/ath/ath12k/wow.c:199:25: note: in expansion of macro 'memcpy'
199 | memcpy(pat + a3_ofs - pkt_ofs,
| ^~~~~~
Address this the same way as the other two, using size_add().
Fixes: b49991d83bba ("wifi: ath12k: fix build vs old compiler")
Fixes: 4a3c212eee0e ("wifi: ath12k: add basic WoW functionalities")
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
---
drivers/net/wireless/ath/ath12k/wow.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/wireless/ath/ath12k/wow.c b/drivers/net/wireless/ath/ath12k/wow.c
index 9b8684abbe40..3624180b25b9 100644
--- a/drivers/net/wireless/ath/ath12k/wow.c
+++ b/drivers/net/wireless/ath/ath12k/wow.c
@@ -191,7 +191,7 @@ ath12k_wow_convert_8023_to_80211(struct ath12k *ar,
memcpy(bytemask, eth_bytemask, eth_pat_len);
pat_len = eth_pat_len;
- } else if (eth_pkt_ofs + eth_pat_len < prot_ofs) {
+ } else if (size_add(eth_pkt_ofs, eth_pat_len) < prot_ofs) {
memcpy(pat, eth_pat, ETH_ALEN - eth_pkt_ofs);
memcpy(bytemask, eth_bytemask, ETH_ALEN - eth_pkt_ofs);
--
2.39.2
