This is a note to let you know that I've just added the patch titled
wifi: brcmfmac: cfg80211: Pass the PMK in binary instead of hex
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
wifi-brcmfmac-cfg80211-pass-the-pmk-in-binary-instea.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit a9166913d7d223634157c14663bad288181cc52b
Author: Hector Martin <marcan@xxxxxxxxx>
Date: Tue Feb 14 18:24:19 2023 +0900
wifi: brcmfmac: cfg80211: Pass the PMK in binary instead of hex
[ Upstream commit 89b89e52153fda2733562776c7c9d9d3ebf8dd6d ]
Apparently the hex passphrase mechanism does not work on newer
chips/firmware (e.g. BCM4387). It seems there was a simple way of
passing it in binary all along, so use that and avoid the hexification.
OpenBSD has been doing it like this from the beginning, so this should
work on all chips.
Also clear the structure before setting the PMK. This was leaking
uninitialized stack contents to the device.
Reviewed-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
Reviewed-by: Arend van Spriel <arend.vanspriel@xxxxxxxxxxxx>
Signed-off-by: Hector Martin <marcan@xxxxxxxxx>
Signed-off-by: Kalle Valo <kvalo@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20230214092423.15175-6-marcan@xxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
index 5a1b01db02e6e..b14c54da56ed9 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
@@ -1350,13 +1350,14 @@ static int brcmf_set_pmk(struct brcmf_if *ifp, const u8 *pmk_data, u16 pmk_len)
{
struct brcmf_pub *drvr = ifp->drvr;
struct brcmf_wsec_pmk_le pmk;
- int i, err;
+ int err;
+
+ memset(&pmk, 0, sizeof(pmk));
- /* convert to firmware key format */
- pmk.key_len = cpu_to_le16(pmk_len << 1);
- pmk.flags = cpu_to_le16(BRCMF_WSEC_PASSPHRASE);
- for (i = 0; i < pmk_len; i++)
- snprintf(&pmk.key[2 * i], 3, "%02x", pmk_data[i]);
+ /* pass pmk directly */
+ pmk.key_len = cpu_to_le16(pmk_len);
+ pmk.flags = cpu_to_le16(0);
+ memcpy(pmk.key, pmk_data, pmk_len);
/* store psk in firmware */
err = brcmf_fil_cmd_data_set(ifp, BRCMF_C_SET_WSEC_PMK,
