From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f79.google.com (mail-io1-f79.google.com [209.85.166.79]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2032436124 for ; Fri, 10 Oct 2025 14:14:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.79 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760105674; cv=none; b=ga6X38bKezQ0yo4Lq3LFFlXZ7bIvlaf379AMMNgEIfREi1rgVbY9yprG3Y26ruaypd3RaUiUz0J/WZcXXxrB9gWpXoKkG7L6bZpcOUATiLAeqMwaSaRaQYxL/10NLvg8JJ/b9B1LYELj0ACIcsEH+Y7hwVD7l1Autsx2R0JaYsg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760105674; c=relaxed/simple; bh=3CBUjkHoKcDc4eae55hRVsYNApO8T+juvhSKWISdee4=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=hicE5Esgu7NNbosPbtdeMGItkZ0SNfTWHQJZN4cO+uwmAhKAX8y/s+0E5DytPaBctoOst+r1WGB1FAxUw5qI4kJrKFAuWDYZo/dE1IYWZoxp26pePPwa2GXISmIwoNxZR8dF1s5WDKVDwGzqCzHiueWvGTwvShTCOjtYeW6dZbY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.166.79 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-io1-f79.google.com with SMTP id ca18e2360f4ac-927f4207211so675467339f.3 for ; Fri, 10 Oct 2025 07:14:32 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1760105672; x=1760710472; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=HKGXAfrOMFC7mG6muRH4oijoMxv8/UaK6fNUmCFKTss=; b=CjblkQHvg3lQ/dpSm3ynUz0HICv/O+NS0oay7mY1kVhI4rEJcJUHu6InwjZArVNx0k O53GMATLu+Vrdr28oYZzi3vHHCuNlAyC26E0Cwb+CIgdszM/bdgUjJ0pxbb3mg6QW8dJ BP6bfoM5MKp/bwk/eMDG6Bjv6ILnxKePqbQwe3GmdJmWz1dckWnKqZhahbqiWMuTJG40 VzgIqSWu8XZDyyvBsf7K/GbxxLigwUYy8hmMLuGq42tX8aylK9iGdiUwT6gwSKpn4QuJ xHCdU+XVkC7VRQOcF2JeoiNzCVsiX5OXHTaZSCfVL+Wb3SmixKffCoJgk6Qq09mcAcaa fVAw== X-Forwarded-Encrypted: i=1; AJvYcCWrHaWjg1cj980uup3NeDqipHN5b5DMD6fd18SiLXL93A+XK+Ed0Cg2hvtZyKTJl5PIBopfR73CJNVzXhQ=@vger.kernel.org X-Gm-Message-State: AOJu0YxS2WkiJdb1bDhGYHupRVpsruydqr8xKEpqAs7sN6EVaPhVuzr+ hr8oZF1XpYrmWEbIWO9B7Ku96oVkDl2LTUk5k8rZYQ95056nB2Hn2ROhrowI7+b3zXJmYjSxjI4 V+ln20br85z04SyZGPlyS9UUQN9eblV0C78VZrh+tuOkkMr32CWMpg6j3VNQ= X-Google-Smtp-Source: AGHT+IFBolmOV5XO5EECQRO9AtwRA+bEfr0qnIjPY8MikU+Yo9KfP2cwapuBWug4BqaaorD1vZE9KCezqDgxlZdn1OAI2yXRGzne Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6602:2b0e:b0:912:5455:f0b0 with SMTP id ca18e2360f4ac-93bd188eab3mr1442867339f.9.1760105672224; Fri, 10 Oct 2025 07:14:32 -0700 (PDT) Date: Fri, 10 Oct 2025 07:14:32 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <68e914c8.050a0220.1186a4.000a.GAE@google.com> Subject: [syzbot] [kernel?] KMSAN: uninit-value in psi_task_change From: syzbot To: anna-maria@linutronix.de, frederic@kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, tglx@linutronix.de Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 9b0d551bcc05 Merge tag 'pull-misc' of git://git.kernel.org.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1539392f980000 kernel config: https://syzkaller.appspot.com/x/.config?x=50fb29d81ff5a3df dashboard link: https://syzkaller.appspot.com/bug?extid=6a41c3d25697203c245a compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/90b0fb888152/disk-9b0d551b.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/1120c646f284/vmlinux-9b0d551b.xz kernel image: https://storage.googleapis.com/syzbot-assets/df9bbfa8cbe6/bzImage-9b0d551b.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+6a41c3d25697203c245a@syzkaller.appspotmail.com ===================================================== BUG: KMSAN: uninit-value in kernfs_ino include/linux/kernfs.h:368 [inline] BUG: KMSAN: uninit-value in cgroup_ino include/linux/cgroup.h:590 [inline] BUG: KMSAN: uninit-value in cgroup_psi include/linux/psi.h:37 [inline] BUG: KMSAN: uninit-value in task_psi_group kernel/sched/psi.c:889 [inline] BUG: KMSAN: uninit-value in psi_task_change+0x4ba/0x710 kernel/sched/psi.c:921 kernfs_ino include/linux/kernfs.h:368 [inline] cgroup_ino include/linux/cgroup.h:590 [inline] cgroup_psi include/linux/psi.h:37 [inline] task_psi_group kernel/sched/psi.c:889 [inline] psi_task_change+0x4ba/0x710 kernel/sched/psi.c:921 psi_enqueue kernel/sched/stats.h:166 [inline] enqueue_task+0x32d/0x390 kernel/sched/core.c:2094 activate_task kernel/sched/core.c:2134 [inline] ttwu_do_activate+0x1dd/0x9d0 kernel/sched/core.c:3706 ttwu_queue kernel/sched/core.c:3969 [inline] try_to_wake_up+0xf83/0x1f50 kernel/sched/core.c:4293 wake_up_process+0x2a/0x40 kernel/sched/core.c:4424 hrtimer_wakeup+0x85/0xd0 kernel/time/hrtimer.c:2013 __run_hrtimer kernel/time/hrtimer.c:1777 [inline] __hrtimer_run_queues+0x559/0xd80 kernel/time/hrtimer.c:1841 hrtimer_interrupt+0x456/0xb80 kernel/time/hrtimer.c:1903 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1041 [inline] __sysvec_apic_timer_interrupt+0xa7/0x420 arch/x86/kernel/apic/apic.c:1058 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1052 [inline] sysvec_apic_timer_interrupt+0x7f/0x90 arch/x86/kernel/apic/apic.c:1052 asm_sysvec_apic_timer_interrupt+0x1f/0x30 arch/x86/include/asm/idtentry.h:702 finish_task_switch+0x184/0x920 kernel/sched/core.c:5193 context_switch kernel/sched/core.c:5328 [inline] __schedule+0x2331/0x7790 kernel/sched/core.c:6929 __schedule_loop kernel/sched/core.c:7011 [inline] schedule+0x17d/0x3c0 kernel/sched/core.c:7026 exit_to_user_mode_loop+0x6c/0x370 kernel/entry/common.c:31 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline] syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline] do_syscall_64+0x1e3/0x210 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f Uninit was created at: __netns_tracker_alloc include/net/net_namespace.h:362 [inline] sk_alloc+0x5de/0x8a0 net/core/sock.c:2311 __netlink_create net/netlink/af_netlink.c:628 [inline] __netlink_kernel_create+0x19b/0xcc0 net/netlink/af_netlink.c:2020 netlink_kernel_create include/linux/netlink.h:62 [inline] rtnetlink_net_init+0x6b/0x110 net/core/rtnetlink.c:7038 ops_init+0x2b3/0x9f0 net/core/net_namespace.c:137 __register_pernet_operations net/core/net_namespace.c:1314 [inline] register_pernet_operations+0x649/0xfa0 net/core/net_namespace.c:1391 register_pernet_subsys+0x5b/0xa0 net/core/net_namespace.c:1432 rtnetlink_init+0x29/0xa0 net/core/rtnetlink.c:7093 netlink_proto_init+0x1f8/0x280 net/netlink/af_netlink.c:2948 do_one_initcall+0x237/0xb60 init/main.c:1283 do_initcall_level+0x157/0x2e0 init/main.c:1345 do_initcalls+0x176/0x310 init/main.c:1361 do_basic_setup+0x1d/0x30 init/main.c:1380 kernel_init_freeable+0x275/0x4a0 init/main.c:1593 kernel_init+0x2f/0x5e0 init/main.c:1483 ret_from_fork+0x233/0x380 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 CPU: 0 UID: 0 PID: 31572 Comm: syz.3.9106 Tainted: G W syzkaller #0 PREEMPT(none) Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 ===================================================== --- 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. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup