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 F27B130F923 for ; Fri, 14 Nov 2025 22:26:30 +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=1763159192; cv=none; b=tYkivbcWAu3Vb9tbpZt9P40pgOUUimtrCS3YMXLC1yuSMhdkoHFVHlJGT1VH+VyVSpnVTIriaqjiN5c01u0mzX+mWkTlQ08GLOMvy1fDyHDR9R7mI2oNAu9zUONxvWqiCLDWcCfVYiRT228nEksKJuI8UlGNgd1mRheVmJNBQOM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763159192; c=relaxed/simple; bh=L14E1+mnmBUsA8oCIlKqvz6DE/rw2qyEOmPe3VUeNdI=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=QCHxq3Uj3WGGXlKHhfd59AGGD29ZxH4vBjxj484ROHlx10hngW+PwY6ktvSFEX6MyiIXlQLHMNFihELq/q9VwQkcG4aVVe5jlGownmmkE8oUW5E/YichZRj6IQFf3U5Ntw1mYjb2gGdzfQHXeQblZbLJiH8BZ7rbEjoOZQtbcRw= 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-948610ae935so188605039f.2 for ; Fri, 14 Nov 2025 14:26:30 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1763159190; x=1763763990; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=+juZmi3Rtr3qwUSQDjdDf/uUa9F24e96P6aYFzW4tzw=; b=Zor2y+yhcUSLUlANRy9e5OvvFUTjtF+dkFuUv0dDKZ8hR7XaNH9XYhpiy+Asqwk52O fLRVCEWx0sWQ+0ooj+y8O6qeZYx2Fw8ElkcvqWP4Jw9O47dYEEQ7P2afIsS7B+pRIns8 f7SuiaqWKoLSUHvOnxuBQmpbIOIA5RQ2V5nN42U15sQRB/J4M2i8w5UDSpVl9NPiWx7Z bzVzZjhWtedyy/aqm2k9oS1JQHp11dcEcBkpkKOcHj5AZh2ccvXG0jzNgHbJMEU4yZGc bTF8Si2wvoO2AEmS7JK/hm9QKQpkcEmPRzxZgRfeugPmbBEEj66lXYPnVRTk44s0TUsf PWQw== X-Forwarded-Encrypted: i=1; AJvYcCXhK4ZICa5qUTtTcvtXCkgCe5Lx+e9xdYdpl7Rc6wnWkZ/3+i3o604XHagY9shWFKFSSTYQLGXjPowHMvY=@vger.kernel.org X-Gm-Message-State: AOJu0Yx8NpMh/T4xqlRO0i3refOiamzrv4rh0GvnuvR/iA7ONMO7k8Fd 3/dlya5hnIrmB7f2ntof6yhSW8ehiHZInhoUPy5v8wNj+MhE7RqkphawRno7rqp7/B4ogc8XS2S wUfGxFlgdKb2qWYPg8alIY/SJaQtny5pGrW3tXqUJ5e0U0ZG8tBHAJ6Mbfwk= X-Google-Smtp-Source: AGHT+IF6UQrjtYIojSeyqWfWZE0M2d0LUGpeTIj6RMlX+cnmDaT1OF8U7/lsdjotdf0k2GnketmqSrKj1CsMjWRAkQJ5U4ThYD32 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6638:2516:b0:5b7:d710:6611 with SMTP id 8926c6da1cb9f-5b7d71067a2mr81829173.20.1763159190136; Fri, 14 Nov 2025 14:26:30 -0800 (PST) Date: Fri, 14 Nov 2025 14:26:30 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6917ac96.050a0220.3565dc.0045.GAE@google.com> Subject: [syzbot] [kernel?] KMSAN: uninit-value in __enqueue_entity 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: e9a6fb0bcdd7 Linux 6.18-rc5 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=13728c12580000 kernel config: https://syzkaller.appspot.com/x/.config?x=cbf50e713aaa5cb0 dashboard link: https://syzkaller.appspot.com/bug?extid=4aaf719f29251ec4637b 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/88b4c5f8dd1b/disk-e9a6fb0b.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/c19e4972aa45/vmlinux-e9a6fb0b.xz kernel image: https://storage.googleapis.com/syzbot-assets/fe50db0896cc/bzImage-e9a6fb0b.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+4aaf719f29251ec4637b@syzkaller.appspotmail.com ===================================================== BUG: KMSAN: uninit-value in __min_slice_update kernel/sched/fair.c:816 [inline] BUG: KMSAN: uninit-value in min_vruntime_update kernel/sched/fair.c:835 [inline] BUG: KMSAN: uninit-value in min_vruntime_cb_propagate kernel/sched/fair.c:842 [inline] BUG: KMSAN: uninit-value in rb_add_augmented_cached include/linux/rbtree_augmented.h:83 [inline] BUG: KMSAN: uninit-value in __enqueue_entity+0xa4d/0xcd0 kernel/sched/fair.c:853 __min_slice_update kernel/sched/fair.c:816 [inline] min_vruntime_update kernel/sched/fair.c:835 [inline] min_vruntime_cb_propagate kernel/sched/fair.c:842 [inline] rb_add_augmented_cached include/linux/rbtree_augmented.h:83 [inline] __enqueue_entity+0xa4d/0xcd0 kernel/sched/fair.c:853 enqueue_entity kernel/sched/fair.c:5286 [inline] enqueue_task_fair+0x100b/0x44a0 kernel/sched/fair.c:6973 enqueue_task+0x68/0x390 kernel/sched/core.c:2092 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+0xaa/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:697 __preempt_count_dec_and_test arch/x86/include/asm/preempt.h:95 [inline] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] _raw_spin_unlock_irqrestore+0x33/0x60 kernel/locking/spinlock.c:194 spin_unlock_irqrestore include/linux/spinlock.h:406 [inline] free_pcppages_bulk+0xbe9/0xc10 mm/page_alloc.c:1492 free_frozen_page_commit+0x946/0x1270 mm/page_alloc.c:2868 __free_frozen_pages+0x799/0x14f0 mm/page_alloc.c:2934 ___free_pages+0xa5/0x1b0 mm/page_alloc.c:5264 __free_pages+0x21/0x30 mm/page_alloc.c:5302 vfree+0x589/0xa20 mm/vmalloc.c:3440 kvfree+0x3b/0x60 mm/slub.c:7145 translate_table+0x109f/0x3530 net/ipv6/netfilter/ip6_tables.c:751 do_replace net/ipv6/netfilter/ip6_tables.c:1154 [inline] do_ip6t_set_ctl+0x148e/0x1da0 net/ipv6/netfilter/ip6_tables.c:1644 nf_setsockopt+0x4fb/0x550 net/netfilter/nf_sockopt.c:101 ipv6_setsockopt+0x1c3/0x300 net/ipv6/ipv6_sockglue.c:978 tcp_setsockopt+0x157/0x180 net/ipv4/tcp.c:4142 sock_common_setsockopt+0xf5/0x140 net/core/sock.c:3912 do_sock_setsockopt net/socket.c:2360 [inline] __sys_setsockopt+0x43e/0x580 net/socket.c:2385 __do_sys_setsockopt net/socket.c:2391 [inline] __se_sys_setsockopt net/socket.c:2388 [inline] __x64_sys_setsockopt+0xf4/0x1a0 net/socket.c:2388 x64_sys_call+0x27c9/0x3e30 arch/x86/include/generated/asm/syscalls_64.h:55 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xd9/0xfa0 arch/x86/entry/syscall_64.c:94 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] iscsi_transport_init+0x285/0x4e0 drivers/scsi/scsi_transport_iscsi.c:4983 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+0x1f5/0x4c0 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 CPU: 1 UID: 0 PID: 3272 Comm: syz.3.9286 Tainted: G W syzkaller #0 PREEMPT(none) Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 ===================================================== --- 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