From patchwork Tue Apr 2 11:32:05 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Antipov X-Patchwork-Id: 785497 Received: from forward102c.mail.yandex.net (forward102c.mail.yandex.net [178.154.239.213]) (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 22D394CB4A; Tue, 2 Apr 2024 11:32:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=178.154.239.213 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712057540; cv=none; b=VI+zVkArYmRqEYnBinE4zVCeFf+m0LDAGP12gDBp7g7R33NoYJe7rJW7NbHNvXtbkWh2pZP+xihE2YUxq7FHOO3BXlFUzPIxty4zPBtfcsvMMRh2tSTWKiXMJF7g8gYjwYq+0i6v1db7afD5IYKva0UwBCLzaH4TZiqwR0h55zA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712057540; c=relaxed/simple; bh=eYeSrltvF+cUWa2IqQCh1lj0SrTxH0+xfPp5ajygmAU=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=JrscB8bpu6mvLRyGkVgpQn/VcgPD+IQw9edWopav4vnqBO5Oo9Bj5K3YM1s9xCyuAuLB51tqX1x6B64QjW6b0OyV0wFdcruMWyws/exNMxfJKVEfPWyMCzG1Ad32PLb8k6R2PIbl29E7SquJYQXf7JA272gj1+2g2DG1ronY9rU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=yandex.ru; spf=pass smtp.mailfrom=yandex.ru; dkim=pass (1024-bit key) header.d=yandex.ru header.i=@yandex.ru header.b=FeN5p0g4; arc=none smtp.client-ip=178.154.239.213 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=yandex.ru Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=yandex.ru Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=yandex.ru header.i=@yandex.ru header.b="FeN5p0g4" Received: from mail-nwsmtp-smtp-production-main-29.myt.yp-c.yandex.net (mail-nwsmtp-smtp-production-main-29.myt.yp-c.yandex.net [IPv6:2a02:6b8:c12:30ac:0:640:8a30:0]) by forward102c.mail.yandex.net (Yandex) with ESMTPS id 0527B60B67; Tue, 2 Apr 2024 14:32:08 +0300 (MSK) Received: by mail-nwsmtp-smtp-production-main-29.myt.yp-c.yandex.net (smtp/Yandex) with ESMTPSA id 6WQ91E8WlKo0-S3pysM6y; Tue, 02 Apr 2024 14:32:07 +0300 X-Yandex-Fwd: 1 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yandex.ru; s=mail; t=1712057527; bh=afxENWSoVYIs+dj5wCAUXvNsz/HQtcJMCSYZyFyBTiM=; h=Message-ID:Date:Cc:Subject:To:From; b=FeN5p0g4RmZ9ynGCzPul+7Gtr2Y/BoyEgltU3ZzxLEwA2s3AcDrFM/cGalP94vXNg aOCkXR4vvoGOsWavrJyE15mcZXRZu73DDxai5OXbZqlFQgroCzdUJME+BwKM5jDRnk VNaEJB8918aoSp+d+mQ7U5CRI42dyJ6CeY36Gcv8= Authentication-Results: mail-nwsmtp-smtp-production-main-29.myt.yp-c.yandex.net; dkim=pass header.i=@yandex.ru From: Dmitry Antipov To: Johan Hedberg Cc: Luiz Augusto von Dentz , linux-bluetooth@vger.kernel.org, lvc-project@linuxtesting.org, Dmitry Antipov , syzbot+39ec16ff6cc18b1d066d@syzkaller.appspotmail.com, stable@vger.kernel.org Subject: [PATCH] Bluetooth: fix memory leak in hci_req_sync_complete() Date: Tue, 2 Apr 2024 14:32:05 +0300 Message-ID: <20240402113205.7260-1-dmantipov@yandex.ru> X-Mailer: git-send-email 2.44.0 Precedence: bulk X-Mailing-List: linux-bluetooth@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 In 'hci_req_sync_complete()', always free the previous sync request state before assigning reference to a new one. Reported-by: syzbot+39ec16ff6cc18b1d066d@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=39ec16ff6cc18b1d066d Cc: stable@vger.kernel.org Fixes: f60cb30579d3 ("Bluetooth: Convert hci_req_sync family of function to new request API") Signed-off-by: Dmitry Antipov --- net/bluetooth/hci_request.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/net/bluetooth/hci_request.c b/net/bluetooth/hci_request.c index 00e02138003e..efea25eb56ce 100644 --- a/net/bluetooth/hci_request.c +++ b/net/bluetooth/hci_request.c @@ -105,8 +105,10 @@ void hci_req_sync_complete(struct hci_dev *hdev, u8 result, u16 opcode, if (hdev->req_status == HCI_REQ_PEND) { hdev->req_result = result; hdev->req_status = HCI_REQ_DONE; - if (skb) + if (skb) { + kfree_skb(hdev->req_skb); hdev->req_skb = skb_get(skb); + } wake_up_interruptible(&hdev->req_wait_q); } }