From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from r3-23.sinamail.sina.com.cn (r3-23.sinamail.sina.com.cn [202.108.3.23]) (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 CD99B186A for ; Thu, 17 Jul 2025 02:35:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=202.108.3.23 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752719709; cv=none; b=p1rmyCMq9PmG01dbn6gQ0bq/8cv8G3xLc1a69PoXBCHzTFEyR954YZWQN6a44f6x3XVqlvBj9NguKhVAF0FA1X+jV+tOIv+ryeaxmD+i0ac/NUEnFHzC/T4fUS/aAqeujzCG95i+NfGEIVWqI48xi6N7cMTS5AbB1kb6x3DCJdw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752719709; c=relaxed/simple; bh=gay+Sus50BgmwKGPcm1KbHWNEyvMYFfx5hlx2wspIKQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=rxPlx+C+aEt2TXyUsr8LR1h5gdBsPfj/NbyozZQTjN4ERM+XDeRGaKXoOT3ojbtFM0s9KH/UL9Jw3DphbytElQtvHodmjkrMWePf6e61W7z2I2z11Dxok3tm0i+Ip/npuLUpatrfcEoVH6K4KQgDIIz4TkU1hZ2L/Ej4qWh25+Q= 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=BzxfPEz9; arc=none smtp.client-ip=202.108.3.23 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="BzxfPEz9" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sina.com; s=201208; t=1752719704; bh=pCGSqhifANmuVexEvcBMyZ9h8zSqr3EKeB79/SdXj8M=; h=From:Subject:Date:Message-ID; b=BzxfPEz9HyUe9rSTksv3OWj/D4DigHMOuahM8nJrP7Obfohg51sr/8IIHZB2YUhyG TIaHOUmxH2rS904EqUzTUbVokfmWh7EUdoc5XrmvgAPw8wxKKo1p5habz15GYx9sII gOXYeveW16Ea+4EODDeLB5kgB9zF1IYX06c8tJpc= X-SMAIL-HELO: localhost.localdomain Received: from unknown (HELO localhost.localdomain)([114.249.58.236]) by sina.com (10.54.253.31) with ESMTP id 6878614C00004502; Thu, 17 Jul 2025 10:34:54 +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: 6027666816292 X-SMAIL-UIID: 8F031F8849444089BCAFB00EFB6D803B-20250717-103454-1 From: Hillf Danton To: syzbot Cc: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, lorenzo.stoakes@oracle.com, surenb@google.com, linux-mm@kvack.org Subject: Re: [syzbot] [mm?] possible deadlock in lock_next_vma Date: Thu, 17 Jul 2025 10:34:43 +0800 Message-ID: <20250717023444.2281-1-hdanton@sina.com> In-Reply-To: <68753289.a70a0220.18f9d4.0003.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, 14 Jul 2025 09:38:33 -0700 [thread overview] > syzbot has found a reproducer for the following issue on: > > HEAD commit: 0be23810e32e Add linux-next specific files for 20250714 > git tree: linux-next > console output: https://syzkaller.appspot.com/x/log.txt?x=15cfb0f0580000 > kernel config: https://syzkaller.appspot.com/x/.config?x=be9e2082003f81ff > dashboard link: https://syzkaller.appspot.com/bug?extid=159a3ef1894076a6a6e9 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1003b18c580000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=11437d82580000 Test [PATCH v7 0/7] use per-vma locks for /proc/pid/maps reads #syz test: git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-new