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 B366430CD95; Wed, 30 Sep 2026 18:07:55 +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=1790791676; cv=none; b=nMM5VP0iVmVKU+GimXBDbhYN8c1yIB96ZPrTSx4akSnC4nKgn5w+aZK149DUn1QL/7kh6RMqZnmy6PLwbKGEawOPX+7gPWDDhNfsOQSiqxorBtViUvi8pUKCGTy6oTVN8vpRiIlnh5QHuXJtZlB+XTQSbUFLpBY20WpM1f6H954= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790791676; c=relaxed/simple; bh=wB4v3W46E9dJRjyXYWRoXAmRoc8WHazysKPqoOCOaIk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=R1UZPoUt2GHGAagRr53mLemaODxX0ExuRI0LFLTRdnR5gByLYtQ6hBQBqTXN4QBnLRcG8nTxt5PuEohO0sknkD/8JjVXtAqRHwIRxeM0+ML9jZxpDlMDQXeBxqYGV1BhW2R6XCsMMSKUkgn9+BeGFnSiX5HNHNup1xxwpE7uNQ4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=dD+QJJdk; 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="dD+QJJdk" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 199FB1F000FF; Wed, 30 Sep 2026 18:07:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1790791675; bh=Nfx93EoyWnNsEfDQYpOKgfSNXT4FjgsXmdqYMsBDOj8=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=dD+QJJdkNcnbgpKvqSMpI+YHPegmJ2CcCeHTzzYu7vK0ev008qnY0JEWTR5Wrs5vd dYggVzY8bqgHvziGdcTNjYo3vDxpDAziFQq9ZyedgqXg+rdASov5XnFdoNvsxpEoUm fzOkAwmcGPnEEZ+pL7EqbaRiBLzcsFi3P5MfCLIw= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Johan Hovold , Paolo Abeni Subject: [PATCH 5.15 386/752] net: hso: fix TIOCMIWAIT race Date: Wed, 30 Sep 2026 17:24:16 +0200 Message-ID: <20260930152406.629494925@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260930152358.131179731@linuxfoundation.org> References: <20260930152358.131179731@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 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Johan Hovold commit 00f9fbc12320253bfc576fb7539d860029c82d0f upstream. The task state must be updated before checking the wakeup condition to avoid missing a racing modem status update. Fixes: 542f54823614 ("tty: Modem functions for the HSO driver") Cc: stable@vger.kernel.org # 2.6.29 Signed-off-by: Johan Hovold Link: https://patch.msgid.link/20260907065235.100848-1-johan@kernel.org Signed-off-by: Paolo Abeni Signed-off-by: Greg Kroah-Hartman --- drivers/net/usb/hso.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/net/usb/hso.c +++ b/drivers/net/usb/hso.c @@ -1555,10 +1555,10 @@ hso_wait_modem_status(struct hso_serial spin_unlock_irq(&serial->serial_lock); add_wait_queue(&tiocmget->waitq, &wait); for (;;) { + set_current_state(TASK_INTERRUPTIBLE); spin_lock_irq(&serial->serial_lock); memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount)); spin_unlock_irq(&serial->serial_lock); - set_current_state(TASK_INTERRUPTIBLE); if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd))) {