5.15-stable review patch. If anyone has any objections, please let me know.
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From: Loic Poulain loic.poulain@oss.qualcomm.com
[ Upstream commit 487e8a8c3421df0af3707e54c7e069f1d89cbda7 ]
It appears that not all hardware/firmware implementations support group key deletion correctly, which can lead to connection hangs and deauthentication following GTK rekeying (delete and install).
To avoid this issue, instead of attempting to delete the key using the special WMI_CIPHER_NONE value, we now replace the key with an invalid (random) value.
This behavior has been observed with WCN39xx chipsets.
Tested-on: WCN3990 hw1.0 WLAN.HL.3.3.7.c2-00931-QCAHLSWMTPLZ-1 Reported-by: Alexey Klimov alexey.klimov@linaro.org Closes: https://lore.kernel.org/all/DAWJQ2NIKY28.1XOG35E4A682G@linaro.org Signed-off-by: Loic Poulain loic.poulain@oss.qualcomm.com Reviewed-by: Baochen Qiang baochen.qiang@oss.qualcomm.com Reviewed-by: Vasanthakumar Thiagarajan vasanthakumar.thiagarajan@oss.qualcomm.com Tested-by: Alexey Klimov alexey.klimov@linaro.org # QRB2210 RB1 Link: https://patch.msgid.link/20250902143225.837487-1-loic.poulain@oss.qualcomm.c... Signed-off-by: Jeff Johnson jeff.johnson@oss.qualcomm.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/wireless/ath/ath10k/mac.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-)
diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c index 2b4c694b0fbbe..d90909ffa6780 100644 --- a/drivers/net/wireless/ath/ath10k/mac.c +++ b/drivers/net/wireless/ath/ath10k/mac.c @@ -13,6 +13,7 @@ #include <linux/acpi.h> #include <linux/of.h> #include <linux/bitfield.h> +#include <linux/random.h>
#include "hif.h" #include "core.h" @@ -286,8 +287,15 @@ static int ath10k_send_key(struct ath10k_vif *arvif, key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
if (cmd == DISABLE_KEY) { - arg.key_cipher = ar->wmi_key_cipher[WMI_CIPHER_NONE]; - arg.key_data = NULL; + if (flags & WMI_KEY_GROUP) { + /* Not all hardware handles group-key deletion operation + * correctly. Replace the key with a junk value to invalidate it. + */ + get_random_bytes(key->key, key->keylen); + } else { + arg.key_cipher = ar->wmi_key_cipher[WMI_CIPHER_NONE]; + arg.key_data = NULL; + } }
return ath10k_wmi_vdev_install_key(arvif->ar, &arg);