From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 A7E90251788; Mon, 12 May 2025 17:31:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747071103; cv=none; b=ZBzYtqt/bvk6ZuhMzqirgrlA3me5q1loXtYR9G4MDfZ7rkoOMjX6LHG2F/bA4JxU/0xEbVHdbKABcRm5j2UV/FvUrzxvo9pFukXSb4rY2QvUAVDo6bc2VeZlHw0H0/6oNQ52N2tXryM1vYLiGAa7MVntAM050tHyuoAUpHzJIRM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747071103; c=relaxed/simple; bh=BG9lis//wf3mvsaD4pacNesaZC9v4XJFb1316zhr/DI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=XZzQGCvUVxDB1aZY9Wgh2lX0dRM4UB7uFersRVmuN0CimSCIWzZOBuCAuxeMD00atea6+tuZo0FUeuYuWpIe7RmGSATE9wLNjhZsV2O0j618A0SLdVGwreZ+A7qmVjzsuD/pLwlp18fqPukhu/3i4jD0PdFfnBr0KO1pj/DqfxI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=r+d1LZUa; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="r+d1LZUa" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 23E33C4CEE7; Mon, 12 May 2025 17:31:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1747071103; bh=BG9lis//wf3mvsaD4pacNesaZC9v4XJFb1316zhr/DI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=r+d1LZUaVVY2+98jJCJdC3SPYpRu2TxjQzhSrqOJ3i5z2XsuKedTjlsYV+Zt4cb1z XWhtXJ11w8GJ8HXOYtS5Zb3qXfRU3n90Rj1l/INutwKIhuC0FnfKz27DFAa5gZAB56 lrhXQifXVuFhnBB0uFyRX9hkuazgDXVqeO/v6+ds= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, stable , Oliver Neukum Subject: [PATCH 5.15 41/54] USB: usbtmc: use interruptible sleep in usbtmc_read Date: Mon, 12 May 2025 19:29:53 +0200 Message-ID: <20250512172017.293717442@linuxfoundation.org> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250512172015.643809034@linuxfoundation.org> References: <20250512172015.643809034@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Oliver Neukum commit 054c5145540e5ad5b80adf23a5e3e2fc281fb8aa upstream. usbtmc_read() calls usbtmc_generic_read() which uses interruptible sleep, but usbtmc_read() itself uses uninterruptble sleep for mutual exclusion between threads. That makes no sense. Both should use interruptible sleep. Fixes: 5b775f672cc99 ("USB: add USB test and measurement class driver") Cc: stable Signed-off-by: Oliver Neukum Link: https://lore.kernel.org/r/20250430134810.226015-1-oneukum@suse.com Signed-off-by: Greg Kroah-Hartman --- drivers/usb/class/usbtmc.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) --- a/drivers/usb/class/usbtmc.c +++ b/drivers/usb/class/usbtmc.c @@ -1380,7 +1380,10 @@ static ssize_t usbtmc_read(struct file * if (!buffer) return -ENOMEM; - mutex_lock(&data->io_mutex); + retval = mutex_lock_interruptible(&data->io_mutex); + if (retval < 0) + goto exit_nolock; + if (data->zombie) { retval = -ENODEV; goto exit; @@ -1503,6 +1506,7 @@ static ssize_t usbtmc_read(struct file * exit: mutex_unlock(&data->io_mutex); +exit_nolock: kfree(buffer); return retval; }