diff mbox series

[net-next,3/4] wilc1000: copy address before calling wilc_set_mac_address

Message ID 20211118142720.3176980-4-kuba@kernel.org (mailing list archive)
State Accepted
Commit b09d58025e3c6c78a874c234769cc95b9276e94e
Delegated to: Netdev Maintainers
Headers show
Series net: constify netdev->dev_addr - x86 changes | expand

Checks

Context Check Description
netdev/tree_selection success Clearly marked for net-next
netdev/fixes_present success Fixes tag not required for -next series
netdev/subject_prefix success Link
netdev/cover_letter success Series has a cover letter
netdev/patch_count success Link
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 0 this patch: 0
netdev/cc_maintainers warning 1 maintainers not CCed: linux-wireless@vger.kernel.org
netdev/build_clang success Errors and warnings before: 0 this patch: 0
netdev/module_param success Was 0 now: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 0 this patch: 0
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 19 lines checked
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Jakub Kicinski Nov. 18, 2021, 2:27 p.m. UTC 
wilc_set_mac_address() calls IO routines which don't guarantee
the pointer won't be written to. Make a copy.

Acked-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
CC: ajay.kathat@microchip.com
CC: claudiu.beznea@microchip.com
---
 drivers/net/wireless/microchip/wilc1000/netdev.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/wireless/microchip/wilc1000/netdev.c b/drivers/net/wireless/microchip/wilc1000/netdev.c
index 690572e01a2a..4712cd7dff9f 100644
--- a/drivers/net/wireless/microchip/wilc1000/netdev.c
+++ b/drivers/net/wireless/microchip/wilc1000/netdev.c
@@ -574,6 +574,7 @@  static int wilc_mac_open(struct net_device *ndev)
 	struct wilc *wl = vif->wilc;
 	int ret = 0;
 	struct mgmt_frame_regs mgmt_regs = {};
+	u8 addr[ETH_ALEN] __aligned(2);
 
 	if (!wl || !wl->dev) {
 		netdev_err(ndev, "device not ready\n");
@@ -596,10 +597,9 @@  static int wilc_mac_open(struct net_device *ndev)
 				vif->idx);
 
 	if (is_valid_ether_addr(ndev->dev_addr)) {
-		wilc_set_mac_address(vif, ndev->dev_addr);
+		ether_addr_copy(addr, ndev->dev_addr);
+		wilc_set_mac_address(vif, addr);
 	} else {
-		u8 addr[ETH_ALEN];
-
 		wilc_get_mac_address(vif, addr);
 		eth_hw_addr_set(ndev, addr);
 	}