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Fri, 15 May 2026 06:17:30 -0400 (EDT) From: Siwei Zhang To: stable@vger.kernel.org Cc: Siwei Zhang , Luiz Augusto von Dentz Subject: [PATCH 6.1.y] Bluetooth: L2CAP: Fix null-ptr-deref in l2cap_sock_get_sndtimeo_cb() Date: Fri, 15 May 2026 06:17:46 -0400 Message-ID: <20260515101752.3692887-1-oss@fourdim.xyz> X-Mailer: git-send-email 2.54.0 In-Reply-To: <2026051216-resource-trading-20ac@gregkh> References: <2026051216-resource-trading-20ac@gregkh> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit commit 78a88d43dab8d23aeef934ed8ce34d40e6b3d613 upstream. Adjusted as stable does not have READ_ONCE around sk->sk_sndtimeo. Add the same NULL guard already present in l2cap_sock_resume_cb() and l2cap_sock_ready_cb(). Fixes: 8d836d71e222 ("Bluetooth: Access sk_sndtimeo indirectly in l2cap_core.c") Signed-off-by: Siwei Zhang Signed-off-by: Luiz Augusto von Dentz --- net/bluetooth/l2cap_sock.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/net/bluetooth/l2cap_sock.c b/net/bluetooth/l2cap_sock.c index 1960d35b3be0..adee617517bb 100644 --- a/net/bluetooth/l2cap_sock.c +++ b/net/bluetooth/l2cap_sock.c @@ -1725,6 +1725,9 @@ static long l2cap_sock_get_sndtimeo_cb(struct l2cap_chan *chan) { struct sock *sk = chan->data; + if (!sk) + return 0; + return sk->sk_sndtimeo; } -- 2.54.0