From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from r3-20.sinamail.sina.com.cn (r3-20.sinamail.sina.com.cn [202.108.3.20]) (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 1F84127FB2B for ; Tue, 30 Dec 2025 09:11:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=202.108.3.20 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767085890; cv=none; b=THvpwDzPv1DB/zONiEL+Wfa/BCeMIc8D8lUJ19odx2sW0npIYLDdpZI9OOAp/ymZLBs4jh0wBR1uZku3t5Rrt6U1beUwtykhp8Smbl9vOgaNGwRQGoWR+extGpa4YSSTRtRDMldPD67fXK+TXi0Of/bpC4mHHDYRRDogQUKGhZE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767085890; c=relaxed/simple; bh=vIDEhrJa7B1aHXH15+kvEljCDHIxEp0rGXtGhs8lb7g=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=oEadfu+2eL3E5cSBRLcT7adnZuZA9nqA4g1T+9Dzm8Lq6NW569jlv6/mT5WK1sWywsR8y/scpv4Yft0ADnVyXHDTiZjO9M3gKHjIMWTzomt8sxsYkWh8yG2MyAl2XeJjGSzvCN5gT0VMRFnaEEW8Vu68zf01AeH28uBfPTHHP0g= 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=xhU0ohVr; arc=none smtp.client-ip=202.108.3.20 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="xhU0ohVr" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sina.com; s=201208; t=1767085886; bh=H0dqXARSbbdETm78VWEBlH4hAouaKBdRSnsrPFdlF3Y=; h=From:Subject:Date:Message-ID; b=xhU0ohVrhntNA1XFWLZJOxrTKh7iz+MjwrQrqTs+W/EHWQOGx0X9AG5ObNvd4LwTD lTf/8+D7dxIWLNzF80+goY/tzAwQ8tAU+1kLsbUOLJigbTWz7Kpi5BtE00Z56Em92x DRdzhT3+8lx1mfZPHcvBZwllNOhMnZOg/TkpFEdw= X-SMAIL-HELO: localhost.localdomain Received: from unknown (HELO localhost.localdomain)([114.249.57.85]) by sina.com (10.54.253.32) with ESMTP id 69539736000031D2; Tue, 30 Dec 2025 17:11:21 +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: 9005314456886 X-SMAIL-UIID: CDCE9E7E4E7944399B2353ED214FEC86-20251230-171121-1 From: Hillf Danton To: syzbot Cc: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Subject: Re: [syzbot] [net?] INFO: task hung in new_device_store (5) Date: Tue, 30 Dec 2025 17:11:04 +0800 Message-ID: <20251230091109.1876-1-hdanton@sina.com> In-Reply-To: <695347ee.050a0220.329c0f.042b.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 #syz test: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master --- x/kernel/hung_task.c +++ y/kernel/hung_task.c @@ -510,6 +510,7 @@ static int watchdog(void *dummy) interval = min_t(unsigned long, interval, timeout); t = hung_timeout_jiffies(hung_last_checked, interval); if (t <= 0) { + timeout = 100; if (!atomic_xchg(&reset_hung_task, 0) && !hung_detector_suspended) check_hung_uninterruptible_tasks(timeout); --