From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.11]) (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 8BA521684BE; Tue, 16 Jun 2026 03:17:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.11 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781579878; cv=none; b=HUUp3HWns54uPqsIyMPk/MOJfY3bW3iQKhZlkMrP9HoCIHr4boscPtEgSMeHPlXZjEWs2vw10JFtAFcSbgOtGtxdICabqQdNSOFHKbAKBY00YRguD1cYr9+ob9OOM2RgZS/VBCLcdA+/Cn/Ej3xB+QxKaYAm9roTyZcpJ4CFZ7U= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781579878; c=relaxed/simple; bh=splptF6Ha7R6jWSoEO5WB17VOVKRQRVfHvvRsiOT6Zc=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=T8INXXyXMZa+aYzMdmurKXX3rOvhfevkHKI6MYi+/QsrH5L0F7zK4LS4O+GZJ5debCM28Ty99AImXdDAMBG6+iUdZ4xyzIdCT/v0i6ugcnP+cj1NixJiqcH/98TUVvOgwy5yqaaB10FLo7w0Kqet3GciSPwF60m8oR1g6MCMU5Q= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=Oot8F/DJ; arc=none smtp.client-ip=198.175.65.11 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="Oot8F/DJ" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1781579876; x=1813115876; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=splptF6Ha7R6jWSoEO5WB17VOVKRQRVfHvvRsiOT6Zc=; b=Oot8F/DJISZujQZC5Vt4zLfAleZWBGoWfIobbvyAKWXbUCxVQVMxVN3E WaFDTuDP1K3J7bFxmKpG1xMgtwmg6dCjc/0hC5U7KDeI1guMfwa2w83G6 LHUmB2FfbZH6CzhMYmZ16dHn/IUmtVGDxOZvVlZvl+pm5H+6ejPBnZRKD eDPy09Cs/NvJMUOhmrtlw/f3Y12Po4icWhdc8W+O9JWLwjl1XAXr79ERO PKtYW8tGkFGz2riNb8FRMDrEyT8vY5vQkOF6DWZyNGz2tWB5BVv85dhiK Usicsua5PPU6UCVHl0ra+n6fgDrTuAOHgdI4hm0CTsPbgsOhO10T7PySY A==; X-CSE-ConnectionGUID: kyWtpsQWQUmIYEMMAXtB5g== X-CSE-MsgGUID: FS9vPF9gR5iPGti6Ax5b8g== X-IronPort-AV: E=McAfee;i="6800,10657,11818"; a="92652041" X-IronPort-AV: E=Sophos;i="6.24,207,1774335600"; d="scan'208";a="92652041" Received: from orviesa004.jf.intel.com ([10.64.159.144]) by orvoesa103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 Jun 2026 20:17:55 -0700 X-CSE-ConnectionGUID: 6hShfk7JQ7u4m2GDQXMrBg== X-CSE-MsgGUID: Rfb/1YsHT4KPTJJawpWyVQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.24,207,1774335600"; d="scan'208";a="251939630" Received: from qat-server-366.sh.intel.com ([10.67.116.162]) by orviesa004.jf.intel.com with ESMTP; 15 Jun 2026 20:17:54 -0700 From: Jie Wang To: Henk Vergonet , Dmitry Torokhov Cc: linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, syzbot+039eab266c6321a174bd@syzkaller.appspotmail.com, syzkaller-bugs@googlegroups.com Subject: [PATCH] Input: yealink - stop URB resubmission on completion error Date: Tue, 16 Jun 2026 11:04:40 +0000 Message-Id: <20260616110440.1073059-1-jie.wang@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <68bba4fb.050a0220.192772.01a4.GAE@google.com> References: <68bba4fb.050a0220.192772.01a4.GAE@google.com> Precedence: bulk X-Mailing-List: linux-input@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit urb_irq_callback() and urb_ctl_callback() resubmit each other's URBs regardless of completion status. When the device returns a persistent error (-EPROTO), this creates an unthrottled resubmission loop that starves the CPU and triggers RCU stalls. Stop resubmitting on any non-zero URB status, following the standard completion pattern used by other USB input drivers. Reported-by: syzbot+039eab266c6321a174bd@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=039eab266c6321a174bd Signed-off-by: Jie Wang --- drivers/input/misc/yealink.c | 26 ++++++++++++++++++++++---- 1 file changed, 22 insertions(+), 4 deletions(-) diff --git a/drivers/input/misc/yealink.c b/drivers/input/misc/yealink.c index 8786ed8b3565..bbfa1a9c23d1 100644 --- a/drivers/input/misc/yealink.c +++ b/drivers/input/misc/yealink.c @@ -414,9 +414,20 @@ static void urb_irq_callback(struct urb *urb) struct yealink_dev *yld = urb->context; int ret, status = urb->status; - if (status) + switch (status) { + case 0: + break; + case -ECONNRESET: + case -ENOENT: + case -ESHUTDOWN: + dev_dbg(&yld->intf->dev, "%s - urb shutting down with status %d\n", + __func__, status); + return; + default: dev_err(&yld->intf->dev, "%s - urb status %d\n", __func__, status); + return; + } switch (yld->irq_data->cmd) { case CMD_KEYPRESS: @@ -452,9 +463,20 @@ static void urb_ctl_callback(struct urb *urb) struct yealink_dev *yld = urb->context; int ret = 0, status = urb->status; - if (status) + switch (status) { + case 0: + break; + case -ECONNRESET: + case -ENOENT: + case -ESHUTDOWN: + dev_dbg(&yld->intf->dev, "%s - urb shutting down with status %d\n", + __func__, status); + return; + default: dev_err(&yld->intf->dev, "%s - urb status %d\n", __func__, status); + return; + } switch (yld->ctl_data->cmd) { case CMD_KEYPRESS: -- 2.34.1