From patchwork Wed Feb 21 14:57:43 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daniil Dulov X-Patchwork-Id: 13565643 Received: from mail-out.aladdin-rd.ru (mail-out.aladdin-rd.ru [91.199.251.16]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1B2AD79DD7; Wed, 21 Feb 2024 14:58:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=91.199.251.16 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708527550; cv=none; b=CKqLMzSVUKcWnwl0Ch1GzbKLD2yrdqlWHRpyAwe89rXOiqPrcGwSd96ialDFZpiMjXAr6Q795mnHU7SbZyCGTJmNyTZGekUPkHrg5rxnXdQlLCWOWfpNPC7KLWh5GJ5DprnQBOzAmf/LNWJ3tYZjX0KGFYNXXl07683sqnQJKD0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708527550; c=relaxed/simple; bh=N+0G2ZdTsC9Iod1o884oqVOm5Ko8o0yA3zGwFZP/CtQ=; h=From:To:CC:Subject:Date:Message-ID:MIME-Version:Content-Type; b=kZPyOVaKv69qJxVAQZvxCNvgvL0jsGhN6VJ5Crx8FhFDgRxSJM6MN+/jRPWTxR3CF/bC5LI7Q/kMRMLBFCXEvcgkzN+gMeJ+gADxy0/+YcAjlsmmmPdOWiNDIro5Qt0P7V5BlpfUwOayKrhi9E3/8XRbFGQxbhuIy2B8EI9tp5U= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=aladdin.ru; spf=pass smtp.mailfrom=aladdin.ru; arc=none smtp.client-ip=91.199.251.16 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=aladdin.ru Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=aladdin.ru From: Daniil Dulov To: Greg Kroah-Hartman , CC: Daniil Dulov , Marcel Holtmann , Johan Hedberg , Luiz Augusto von Dentz , Arkadiusz Bokowy , , , Subject: [PATCH 5.10/5.15 0/1] Bluetooth: Fix deadlock in vhci_send_frame Date: Wed, 21 Feb 2024 17:57:43 +0300 Message-ID: <20240221145744.27895-1-d.dulov@aladdin.ru> X-Mailer: git-send-email 2.25.1 Precedence: bulk X-Mailing-List: linux-bluetooth@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: EXCH-2016-03.aladdin.ru (192.168.1.103) To EXCH-2016-01.aladdin.ru (192.168.1.101) Syzkaller reports a potential circular dependency leading to deadlock in 5.10 and 5.15 stable releases since the commit 92d4abd66f70 ("Bluetooth: vhci: Fix race when opening vhci device") that caused this crash was backported to these branches. The problem has been fixed by the following upstream patch that was adapted to 5.10 and 5.15. All of the changes made to the patch in order to adapt it are described at the end of commit message. This patch has already been backported to the following stable branches: v6.6 - https://lore.kernel.org/stable/20231230115814.038261305@linuxfoundation.org/ v6.1 - https://lore.kernel.org/stable/20231230115807.749489379@linuxfoundation.org/ Found by Linux Verification Center (linuxtesting.org) with Syzkaller.