From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp153-163.sina.com.cn (smtp153-163.sina.com.cn [61.135.153.163]) (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 297CD387362 for ; Tue, 1 Sep 2026 01:26:54 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=61.135.153.163 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788226022; cv=none; b=nDIBA3tbQnxZCsAN6bTeDB2Qhg3uMyd6mnzm1KzUGulr/ahNHA4WJw2KnmTNDvMrwbWpRxEgihbZW2FO0pUMrAVSFlTJqDozZGNqIFwMnISb7z8VQoBvQcIB931BrV6mIqZ8+z408FKE9WUHSk1WzDIi3gGefJGt52vFoSUAMn0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788226022; c=relaxed/simple; bh=XphEGZORPY++0vvKvynN2saIwV+kuKOlYonOdF/ZrUI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=KHaCNdCHG3SGy//1TVav49s+cl5DuRBKgrXRRQRNhKr4pNOB2xQGWig+n1eBA9NyYYcDTt/ntiWvfI9GoeY9NnNB8K9qG9Ae/FkLXlZX1lCc31+kX8AymZrRqEirgV6zbritazQKDDicvpqPYtos2WcqOiGL+rHZ9Zj7iPSlCIg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=sina.com; spf=pass smtp.mailfrom=sina.com; dkim=pass (1024-bit key) header.d=sina.com header.i=@sina.com header.b=gjIj1ZWr; arc=none smtp.client-ip=61.135.153.163 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=sina.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=sina.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=sina.com header.i=@sina.com header.b="gjIj1ZWr" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sina.com; s=201208; t=1788226015; bh=H+b3PnRJDwEw278XZyKq08CbBBC3StVQSPT3Bazg+2c=; h=From:Subject:Date:Message-ID; b=gjIj1ZWrwkI0D0W4RPzLzhRzYsSzcA1o4EGCyBzB8OmpeYsHqybkfZXlSit41W7hL 0oOiUDq2AcrEts/wk2FLcrp90rlsxQKQ6AkaMSWZFhDXJ8j7IQMZqqOEn4kXkccH8w W+RTTJkSXbU0Pjn4FhxZ2FiH4OZuJyvaga7xC2u8= X-SMAIL-HELO: localhost.localdomain Received: from unknown (HELO localhost.localdomain)([114.249.62.194]) by sina.com (10.54.253.32) with ESMTP id 6A9629D300007296; Tue, 1 Sep 2026 09:26:45 +0800 (CST) X-Sender: hdanton@sina.com X-Auth-ID: hdanton@sina.com Authentication-Results: sina.com; spf=none smtp.mailfrom=hdanton@sina.com; dkim=none header.i=none; dmarc=none action=none header.from=hdanton@sina.com X-SMAIL-MID: 4501614456761 X-SMAIL-UIID: DC9F97D110C14BBB9E5070F2F89CD2CC-20260901-092645-1 From: Hillf Danton To: syzbot Cc: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Subject: Re: [syzbot] [i2c?] [usb?] INFO: task hung in em28xx_i2c_unregister Date: Tue, 1 Sep 2026 09:26:28 +0800 Message-ID: <20260901012633.1985-1-hdanton@sina.com> In-Reply-To: <6a95ef74.764875ec.b345.0003.GAE@google.com> References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit > Date: Mon, 31 Aug 2026 14:17:40 -0700 [thread overview] > Hello, > > syzbot found the following issue on: > > HEAD commit: a23cbb05744b Merge tag 'timers-urgent-2026-08-30' of git:/.. > git tree: upstream > console+strace: https://syzkaller.appspot.com/x/log.txt?x=12a6d379580000 > kernel config: https://syzkaller.appspot.com/x/.config?x=5e4e3a0e188a497e > dashboard link: https://syzkaller.appspot.com/bug?extid=f669f02a0fcc5b2148f2 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12d1f379580000 #syz test --- x/drivers/i2c/i2c-core-base.c +++ y/drivers/i2c/i2c-core-base.c @@ -1844,7 +1844,7 @@ void i2c_del_adapter(struct i2c_adapter */ init_completion(&adap->dev_released); device_unregister(&adap->dev); - wait_for_completion(&adap->dev_released); + wait_for_completion_timeout(&adap->dev_released, 50 * HZ); /* free bus id */ mutex_lock(&core_lock); --