This is a note to let you know that I've just added the patch titled
wifi: brcm80211: handle pmk_op allocation failure
to the 6.6-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-brcm80211-handle-pmk_op-allocation-failure.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 21906a34e8374bc0a5714dfca53a68719b428738
Author: Duoming Zhou <duoming@xxxxxxxxxx>
Date: Thu Feb 29 18:31:53 2024 +0800
wifi: brcm80211: handle pmk_op allocation failure
[ Upstream commit b4152222e04cb8afeeca239c90e3fcaf4c553b42 ]
The kzalloc() in brcmf_pmksa_v3_op() will return null if the
physical memory has run out. As a result, if we dereference
the null value, the null pointer dereference bug will happen.
Return -ENOMEM from brcmf_pmksa_v3_op() if kzalloc() fails
for pmk_op.
Fixes: a96202acaea4 ("wifi: brcmfmac: cfg80211: Add support for PMKID_V3 operations")
Acked-by: Arend van Spriel <arend.vanspriel@xxxxxxxxxxxx>
Signed-off-by: Duoming Zhou <duoming@xxxxxxxxxx>
Reviewed-by: Kees Cook <keescook@xxxxxxxxxxxx>
Signed-off-by: Kalle Valo <kvalo@xxxxxxxxxx>
Link: https://msgid.link/20240229103153.18533-1-duoming@xxxxxxxxxx
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 6049f9a761d9d..df9c26593dbe1 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
@@ -4323,6 +4323,9 @@ brcmf_pmksa_v3_op(struct brcmf_if *ifp, struct cfg80211_pmksa *pmksa,
int ret;
pmk_op = kzalloc(sizeof(*pmk_op), GFP_KERNEL);
+ if (!pmk_op)
+ return -ENOMEM;
+
pmk_op->version = cpu_to_le16(BRCMF_PMKSA_VER_3);
if (!pmksa) {
