From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0672A329E7E; Sun, 7 Jun 2026 10:35:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780828515; cv=none; b=bNYvf69oeOA8BZ5ox8Gc2zctauBajQa6DNkODyQE1l9GYuHXTv5a94aBKf+/TpEYudTSIBPFcHcGIF6EruLNs3GAQN72s3SO0tsl1cMdMhz+0wPU6bisfPd4YYJBE+fAqXMiFPl49VHgLZMjVr+Yhtjuqr16Wna5y49Gf9jP0yA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780828515; c=relaxed/simple; bh=Fm9Dt2AbKwMXV1SL6QCBB9FhmI7Pt0wzyA4QXRz4B/8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=U2B1JpyTPFZlawjCmrYL7asYBRZLXc6VFXo0u77XZqNm2bRuIY6Mi4sz7slK9o6M+w3reWfUG49+wssjXQJnuGNHL0Sm0pmm3YJu/NeZAt8FQND8TbRfflqB0AjmYGus8qdSpf3wguast3JVwhmnF/VyMCchse1uvQ366ck2TLw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=ShWOvbiT; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="ShWOvbiT" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C9E131F00893; Sun, 7 Jun 2026 10:35:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1780828513; bh=Hp0Bo085WA4X6FMcxhmXGhByi5h8KEZ3+izdpwdi6Io=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=ShWOvbiTvXcc3M40xMPuj7/BResmCZsWs4m+l6riz0gH3rkpAz8IUHw8V9vAsW7bg P0ElS5TEFCi7nYvBC9Z3/htuswSzgyB5uJpxosqZWu7auT5fN/lo45PlhA2chcZv0K znSBXne9ZaO6vzWMdSBIWVurDbaIgLniV1wtc+9o= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Siwei Zhang , Luiz Augusto von Dentz Subject: [PATCH 6.12 144/307] Bluetooth: L2CAP: fix chan ref leak in l2cap_chan_timeout() on !conn Date: Sun, 7 Jun 2026 11:59:01 +0200 Message-ID: <20260607095733.023358594@linuxfoundation.org> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260607095727.647295505@linuxfoundation.org> References: <20260607095727.647295505@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Siwei Zhang commit 9dbd84990394c51f5cee1e8871bb5ff8af5ed939 upstream. __set_chan_timer() takes a l2cap_chan reference via l2cap_chan_hold() before scheduling the delayed work. The normal path in l2cap_chan_timeout() drops this reference with l2cap_chan_put() at the end, but the early return when chan->conn is NULL skips the put, leaking the reference. Add the missing l2cap_chan_put() before the early return. Fixes: adf0398cee86 ("Bluetooth: l2cap: fix null-ptr-deref in l2cap_chan_timeout") Cc: stable@vger.kernel.org Signed-off-by: Siwei Zhang Signed-off-by: Luiz Augusto von Dentz Signed-off-by: Greg Kroah-Hartman --- net/bluetooth/l2cap_core.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) --- a/net/bluetooth/l2cap_core.c +++ b/net/bluetooth/l2cap_core.c @@ -411,8 +411,10 @@ static void l2cap_chan_timeout(struct wo BT_DBG("chan %p state %s", chan, state_to_string(chan->state)); - if (!conn) + if (!conn) { + l2cap_chan_put(chan); return; + } mutex_lock(&conn->lock); /* __set_chan_timer() calls l2cap_chan_hold(chan) while scheduling