From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B1635ECAAA3 for ; Fri, 26 Aug 2022 09:19:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1343528AbiHZJTc (ORCPT ); Fri, 26 Aug 2022 05:19:32 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44650 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S245703AbiHZJTa (ORCPT ); Fri, 26 Aug 2022 05:19:30 -0400 Received: from mail-il1-f197.google.com (mail-il1-f197.google.com [209.85.166.197]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B417AD7435 for ; Fri, 26 Aug 2022 02:19:28 -0700 (PDT) Received: by mail-il1-f197.google.com with SMTP id i26-20020a056e021d1a00b002e9865e8963so774843ila.14 for ; Fri, 26 Aug 2022 02:19:28 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc; bh=7awWSOHLPnAjg3OIqppgmOG9YBZWnjkmLUSpTqU3g/U=; b=KYM9UA4JPPoT8iqqkszsOjJbakADLVqfGf/tkzfFnzAtMZHxgLZgFQjvK+cgqaKJIa mCU2wB/QEq337dhqCWcesYQikYVDE8foiavBmKsHM9oF1L+XdV3utcCWLEs4NOdyD9X/ gL5nF5Nyf8+1Dq+ARtZId29lkEEEYYZsZQyCV0nFRQgwM7OdoBemy8nE9G5uxOQPk+CU DGRJFAciPQ6VBaxWPsR60mKcwDpGcln/3DdqXPJAlDIhD4G5eS5hf52I2bh50I8RkRJ+ BiAe7XR6U49s+BoB1Q3CvTLtL5697HdHXBYVo+sBpVSoTwIwKJ7rRW5xYBrlIXKX3v7Z 5eSA== X-Gm-Message-State: ACgBeo2jVnUjksxvhRlW0P6a7J5gdYTHCncT7zMKtEx2jRA98+Rl33+g UrT5E5Aj2EnEcyOHDAiTJ6nFxPjqlwG/pfH5evpWrSqYGlFX X-Google-Smtp-Source: AA6agR7pWosGxbwJcVkZzs0IfYElXo5vIiEU4cXBP2pG9isPQ6jF+KiGcl/yCCX6hd6UyGuGdM6EwGdqUar6HS0gYGviz1tfg664 MIME-Version: 1.0 X-Received: by 2002:a6b:510d:0:b0:689:5a18:1150 with SMTP id f13-20020a6b510d000000b006895a181150mr3075634iob.73.1661505568010; Fri, 26 Aug 2022 02:19:28 -0700 (PDT) Date: Fri, 26 Aug 2022 02:19:27 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000002c7abf05e721698d@google.com> Subject: [syzbot] KMSAN: uninit-value in psi_poll_worker From: syzbot To: bpf@vger.kernel.org, brauner@kernel.org, cgroups@vger.kernel.org, glider@google.com, hannes@cmpxchg.org, linux-kernel@vger.kernel.org, lizefan.x@bytedance.com, syzkaller-bugs@googlegroups.com, tj@kernel.org Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: 3a2b6b904ea7 x86: kmsan: enable KMSAN builds for x86 git tree: https://github.com/google/kmsan.git master console output: https://syzkaller.appspot.com/x/log.txt?x=13f51a33080000 kernel config: https://syzkaller.appspot.com/x/.config?x=8e64bc5364a1307e dashboard link: https://syzkaller.appspot.com/bug?extid=dd8e45eb61404849cde9 compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project.git 610139d2d9ce6746b3c617fb3e2f7886272d26ff), GNU ld (GNU Binutils for Debian) 2.35.2 Unfortunately, I don't have any reproducer for this issue yet. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+dd8e45eb61404849cde9@syzkaller.appspotmail.com ===================================================== BUG: KMSAN: uninit-value in update_triggers kernel/sched/psi.c:525 [inline] BUG: KMSAN: uninit-value in psi_poll_work kernel/sched/psi.c:626 [inline] BUG: KMSAN: uninit-value in psi_poll_worker+0x972/0x16a0 kernel/sched/psi.c:648 update_triggers kernel/sched/psi.c:525 [inline] psi_poll_work kernel/sched/psi.c:626 [inline] psi_poll_worker+0x972/0x16a0 kernel/sched/psi.c:648 kthread+0x31b/0x430 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 Uninit was stored to memory at: collect_percpu_times+0x193d/0x19a0 kernel/sched/psi.c:355 psi_poll_work kernel/sched/psi.c:604 [inline] psi_poll_worker+0x587/0x16a0 kernel/sched/psi.c:648 kthread+0x31b/0x430 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 Uninit was stored to memory at: collect_percpu_times+0x193d/0x19a0 kernel/sched/psi.c:355 psi_poll_work kernel/sched/psi.c:604 [inline] psi_poll_worker+0x587/0x16a0 kernel/sched/psi.c:648 kthread+0x31b/0x430 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 Uninit was created at: slab_post_alloc_hook mm/slab.h:732 [inline] slab_alloc_node mm/slub.c:3258 [inline] slab_alloc mm/slub.c:3266 [inline] kmem_cache_alloc_trace+0x696/0xdf0 mm/slub.c:3297 kmalloc include/linux/slab.h:600 [inline] psi_cgroup_alloc+0x83/0x250 kernel/sched/psi.c:960 cgroup_create kernel/cgroup/cgroup.c:5430 [inline] cgroup_mkdir+0x10a3/0x3080 kernel/cgroup/cgroup.c:5550 kernfs_iop_mkdir+0x2ba/0x520 fs/kernfs/dir.c:1185 vfs_mkdir+0x62a/0x870 fs/namei.c:4013 do_mkdirat+0x466/0x7b0 fs/namei.c:4038 __do_sys_mkdirat fs/namei.c:4053 [inline] __se_sys_mkdirat fs/namei.c:4051 [inline] __x64_sys_mkdirat+0xc4/0x120 fs/namei.c:4051 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd CPU: 0 PID: 19765 Comm: psimon Not tainted 6.0.0-rc2-syzkaller-47460-g3a2b6b904ea7 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 ===================================================== --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot.