From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f206.google.com (mail-il1-f206.google.com [209.85.166.206]) (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 EF27428B7F9 for ; Fri, 15 Aug 2025 15:34:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.206 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755272073; cv=none; b=Tjc80in+ozaUII/yhzW9zUkAfXfPYNyCT649iVcJDwpAx4LB+GKf3IZySKbR4owtXEkDA1qNaR/sjWAWD/+f/3KAU0bYNKoWl8r/ea9Aoxrn2Ub3ta/sKEnQ51QB9YU/i6BNm/HdyfYn3znxa3ONBrXjFSS7ssK6x9G0mC8Czz0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755272073; c=relaxed/simple; bh=v1WKoz9xUGwYHrvTBjW5q7JHZzJGq7yhgX2nxSlbwsI=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=B86U/bPKAQrBVZKTQ5WYt2/YpuxY9Yx4sJVsnE+EyaUemMYmM2R4WwRoFY6kfEVwynnW2d2rFrPeC7MNBmfwq2FkzXxWmrSG4gv+pLwps2SjkjG5c1+XAQqoWc4X9so1RMkQ0nAoeVW7Dpjss91khQaxZ+4H1CCIbH2wBR0GIIg= 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=209.85.166.206 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-il1-f206.google.com with SMTP id e9e14a558f8ab-3e580be9806so4994265ab.1 for ; Fri, 15 Aug 2025 08:34:31 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1755272071; x=1755876871; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=4UBBw7L5NC+UoNNtVsBVt3nBBNgpwnO+Xo1HV/zu+i4=; b=mTv3wL8zUiCDgiu00xUjYzYCyC/iWfb1oCV9gw3osIv1QlSxJPpgJPyGExynR2T8YN zJ4XXfoOFxw8DxhJs6GxMXHLBjoEmdkZwV3bPsg4OfZnWqPutSOmyBPfT++3mpTYcNov eSDFm0r118it8Hr37ctPlKE91qB1TYQVrhY0/bW2lkupfbg8GkPxWqDDDwlvbvVZOS6F bvTCxgJJrnzaKb5x4M+mz6IpwS4iDe3YwItG0c/B99crfXes6NYK3+mfTrBGE49EJ8YK DkUf5BXEiM1kfYCp0b0O2Z3A+SnbY5PncHvSRA8/s5Ogr/2qXGmXrGlVWEZA+up3nNg5 yPBg== X-Forwarded-Encrypted: i=1; AJvYcCW0I9fhGK+BJ6ie+00/VXcWpKnYF3brJHDEJgVIundoXucg8qAvB7QTZcqjBPFRRsjwPmeBisahV9OjUnk=@vger.kernel.org X-Gm-Message-State: AOJu0Yy2cFPHHemEgPKaBzT51Q8Rvn8K6aLKdrBxszXkUZ/uBzgc+1ju vNrybLvVhDiI1WiI2X5aRrW2FbNuFUDlDq6o5KIplXBNybGGczzY89F/6U/20pWZ7VFz4b6cLuY 1VSctIOprLPV594wrIUxhEK3xqHYVt+GclOMBR7wTP+nMp4CopHVfJmG3zuw= X-Google-Smtp-Source: AGHT+IHQoo+abLPqcmAewudmcI5c1OLdi/lygZI83wNwmtArrInvX3MFB19TPtHHNoFldZzz+xEf4PrZB5oaDLrBzd/gWznEyRxm Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:16ce:b0:3e5:4eb2:73db with SMTP id e9e14a558f8ab-3e57e80df84mr41721855ab.5.1755272066506; Fri, 15 Aug 2025 08:34:26 -0700 (PDT) Date: Fri, 15 Aug 2025 08:34:26 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <689f5382.050a0220.e29e5.001b.GAE@google.com> Subject: [syzbot] [kernel?] KMSAN: uninit-value in process_timeout 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: 0cc53520e68b Merge tag 'probes-fixes-v6.17-rc1' of git://g.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=168dbc34580000 kernel config: https://syzkaller.appspot.com/x/.config?x=80850d07adb04ea2 dashboard link: https://syzkaller.appspot.com/bug?extid=2a895bf937943f1666cc compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/cad3c74a9bc2/disk-0cc53520.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/7b87febcb296/vmlinux-0cc53520.xz kernel image: https://storage.googleapis.com/syzbot-assets/0dd5c054303b/bzImage-0cc53520.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+2a895bf937943f1666cc@syzkaller.appspotmail.com ===================================================== BUG: KMSAN: uninit-value in process_timeout+0x59/0x60 kernel/time/sleep_timeout.c:27 process_timeout+0x59/0x60 kernel/time/sleep_timeout.c:27 call_timer_fn+0x4c/0x520 kernel/time/timer.c:1747 expire_timers kernel/time/timer.c:1798 [inline] __run_timers kernel/time/timer.c:2372 [inline] __run_timer_base+0x80f/0xd90 kernel/time/timer.c:2384 run_timer_base kernel/time/timer.c:2393 [inline] run_timer_softirq+0x3a/0x80 kernel/time/timer.c:2403 handle_softirqs+0x166/0x6e0 kernel/softirq.c:579 __do_softirq kernel/softirq.c:613 [inline] invoke_softirq kernel/softirq.c:453 [inline] __irq_exit_rcu+0x66/0x180 kernel/softirq.c:680 irq_exit_rcu+0x12/0x20 kernel/softirq.c:696 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline] sysvec_apic_timer_interrupt+0x84/0x90 arch/x86/kernel/apic/apic.c:1050 asm_sysvec_apic_timer_interrupt+0x1f/0x30 arch/x86/include/asm/idtentry.h:702 __nr_to_section include/linux/mmzone.h:1937 [inline] __pfn_to_section include/linux/mmzone.h:2079 [inline] pfn_valid include/linux/mmzone.h:2161 [inline] kmsan_virt_addr_valid arch/x86/include/asm/kmsan.h:94 [inline] virt_to_page_or_null+0x99/0x180 mm/kmsan/shadow.c:75 kmsan_get_metadata+0xfb/0x160 mm/kmsan/shadow.c:141 kmsan_get_shadow_origin_ptr+0x4a/0xb0 mm/kmsan/shadow.c:102 get_shadow_origin_ptr mm/kmsan/instrumentation.c:38 [inline] __msan_metadata_ptr_for_load_8+0x24/0x40 mm/kmsan/instrumentation.c:94 batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:409 [inline] batadv_nc_worker+0x11f/0x1aa0 net/batman-adv/network-coding.c:719 process_one_work kernel/workqueue.c:3236 [inline] process_scheduled_works+0xb91/0x1d80 kernel/workqueue.c:3319 worker_thread+0xedf/0x1590 kernel/workqueue.c:3400 kthread+0xd59/0xf00 kernel/kthread.c:463 ret_from_fork+0x1e3/0x310 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Local variable timer created at: schedule_timeout+0x44/0x240 kernel/time/sleep_timeout.c:63 kcompactd+0x470/0x2340 mm/compaction.c:3187 CPU: 1 UID: 0 PID: 3876 Comm: kworker/u8:20 Tainted: G W 6.17.0-rc1-syzkaller-00038-g0cc53520e68b #0 PREEMPT(none) Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 Workqueue: bat_events batadv_nc_worker ===================================================== --- 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