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From: Duoming Zhou <>
Cc:,,,,,,,,,,,, Duoming Zhou <>
Subject: [PATCH v3] wifi: brcm80211: handle pmk_op allocation failure
Date: Thu, 29 Feb 2024 18:31:53 +0800	[thread overview]
Message-ID: <> (raw)

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 <>
Signed-off-by: Duoming Zhou <>
Changes in v3:
  - Just return -ENOMEM.

 drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
index 28d6a30cc01..1a5d7494f5e 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
@@ -4322,6 +4322,9 @@ 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) {

             reply	other threads:[~2024-02-29 10:32 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-02-29 10:31 Duoming Zhou [this message]
2024-02-29 11:36 ` [PATCH v3] wifi: brcm80211: handle pmk_op allocation failure Arend van Spriel
2024-03-01  0:40 ` Kees Cook
2024-03-05 18:56 ` Kalle Valo

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