From patchwork Tue Jun 8 18:27:21 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 457554 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 41221C47082 for ; Tue, 8 Jun 2021 19:14:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2DB2B61073 for ; Tue, 8 Jun 2021 19:14:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236578AbhFHTQk (ORCPT ); Tue, 8 Jun 2021 15:16:40 -0400 Received: from mail.kernel.org ([198.145.29.99]:58766 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235789AbhFHTNz (ORCPT ); Tue, 8 Jun 2021 15:13:55 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 0631361975; Tue, 8 Jun 2021 18:49:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1623178192; bh=UJxCPsrIFylTfCwOd8W5nGWDbWrTnO+6FpPRoAQXl10=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=dLGIuuAqKcjq4M9OKCN7x6yHgEWfJ/YrMoqeX8MeI5c1PUw0ZFeAywibVlNC9nfa+ BKxac/kYcIHNMR+AG7wLgdsjNWtSJpcT3AmZzS+p9vyuN9SxOuspxrEBS/Kka7N7xM A0vfykrOV/nqszMsZz17omOjoYJBzrfkYJimUlto= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, syzbot+d102fa5b35335a7e544e@syzkaller.appspotmail.com, Jaroslav Kysela , Takashi Iwai Subject: [PATCH 5.12 111/161] ALSA: timer: Fix master timer notification Date: Tue, 8 Jun 2021 20:27:21 +0200 Message-Id: <20210608175949.216425890@linuxfoundation.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210608175945.476074951@linuxfoundation.org> References: <20210608175945.476074951@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Takashi Iwai commit 9c1fe96bded935369f8340c2ac2e9e189f697d5d upstream. snd_timer_notify1() calls the notification to each slave for a master event, but it passes a wrong event number. It should be +10 offset, corresponding to SNDRV_TIMER_EVENT_MXXX, but it's incorrectly with +100 offset. Casually this was spotted by UBSAN check via syzkaller. Reported-by: syzbot+d102fa5b35335a7e544e@syzkaller.appspotmail.com Reviewed-by: Jaroslav Kysela Cc: Link: https://lore.kernel.org/r/000000000000e5560e05c3bd1d63@google.com Link: https://lore.kernel.org/r/20210602113823.23777-1-tiwai@suse.de Signed-off-by: Takashi Iwai Signed-off-by: Greg Kroah-Hartman --- sound/core/timer.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/sound/core/timer.c +++ b/sound/core/timer.c @@ -520,9 +520,10 @@ static void snd_timer_notify1(struct snd return; if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE) return; + event += 10; /* convert to SNDRV_TIMER_EVENT_MXXX */ list_for_each_entry(ts, &ti->slave_active_head, active_list) if (ts->ccallback) - ts->ccallback(ts, event + 100, &tstamp, resolution); + ts->ccallback(ts, event, &tstamp, resolution); } /* start/continue a master timer */