From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oo1-f78.google.com (mail-oo1-f78.google.com [209.85.161.78]) (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 62E50339860 for ; Fri, 19 Dec 2025 11:46:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.161.78 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766144789; cv=none; b=syAut2RyPvhdtzrf3j0UxtB3w9EiBvzFqgLkSeDiVATxa+AEVPuERUWi70VuzIc/rs86cQo3vpFvRhOAMb/+HCua7fNpQ/E/i3kMe/4dgAtcBLxYgQ05kXXMIQ+taJ6whJIO0eUSzLu5FY7YZXRTAcO3EFlki2bi7M+NCHa0nHk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766144789; c=relaxed/simple; bh=XaBIy5aFqTLfkSIfPU8BD4WW4mqn3LMr/QClhdZoASg=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=RKC+qeU/fBybkpGHYKoiDGRyyt8le+j+RSNz3s5y06I8hfQ0u5lnKvGzmkt+2zHSJ9Qk2+w0B70akfObzsTaV4c2uyw0w6x0Pvm0xCt0IG1OWl9XiSiZDuBipd3S8u6ZSlfJs7kFRuJ8UQlRffVnLD2YqGu0XNszitITGJffUNw= 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=209.85.161.78 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-oo1-f78.google.com with SMTP id 006d021491bc7-65b153371efso4369276eaf.1 for ; Fri, 19 Dec 2025 03:46:27 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1766144786; x=1766749586; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=G0cydF2vkJB8Be/5PIrVaZHrQmJKmz/QbzcZboOxvpI=; b=SmgXQ4WP3BMaOHrl4mUvBpkmVTOOC9U/xyBX2Mg0vQfxDqjmhjcSHDKJQhv+BaZXN+ xJdGXYT9CPHso1GZ6Uj5yhv5dVfk9zol9t6Bz3f32gc4gVOprTZPmWOJcnPI4r2oQ+sH CoGK0BPBmDTeHgssKBX854jae0gIK6NPbszcusYp7LpLYyFW2mbnQyvdCXlj4UNjjZ5Z /p0jQy2e1FXwnRECa9B5iJeaqVMaojShrDj145qsbJKMN+zpzv0q5JtI5YJrcAxqNi2m pZX+aOR4x/ls9z77jfYhD5We4VZkD4BAXQZSko9a50GkK1TnldDl/zvgzLHdb/9acV/O uuWw== X-Forwarded-Encrypted: i=1; AJvYcCWzXZhz2RYQNYSXaG/X8PnqfZMMZStPHw/NiW/3d2xRauPnOxuJVPR3evu976EktKqHEEacwauVefkqwCA=@vger.kernel.org X-Gm-Message-State: AOJu0YyVcJ0E1WXAHfgPsAz3gIZazeELGWrnfQCgPfhnl6RJD6LJXJ22 GzbcM+mUxYI+6kWZ7y1/IEy11aEQs3vSwdCmxbNi2Le46QQgKG2Wg1y61sXughn76DTpS/xoWwA I4SF4yZTozJULvAGVHV8OxPrNYagL2QzKgbO+Sv0SdQrwUwaW1pxD+6m49S8= X-Google-Smtp-Source: AGHT+IFMV1J8JoSOeE6yX0Xu7TMjbW9qdbkz1EzjY7bzN/bRVrd5DBVWO8P8bOS4UPDQTTtRgEaoS80ujD86DY6PNJOccgPok9Rl Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:6483:b0:65b:5366:a6e2 with SMTP id 006d021491bc7-65cfe749412mr1982764eaf.26.1766144786375; Fri, 19 Dec 2025 03:46:26 -0800 (PST) Date: Fri, 19 Dec 2025 03:46:26 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69453b12.a70a0220.207337.010f.GAE@google.com> Subject: [syzbot] [kernel?] WARNING in sched_change_end From: syzbot To: andrealmeid@igalia.com, dave@stgolabs.net, dvhart@infradead.org, linux-kernel@vger.kernel.org, mingo@redhat.com, peterz@infradead.org, syzkaller-bugs@googlegroups.com, tglx@linutronix.de Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 1058ca9db0ed Add linux-next specific files for 20251218 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=16fe331a580000 kernel config: https://syzkaller.appspot.com/x/.config?x=116674f009f72a18 dashboard link: https://syzkaller.appspot.com/bug?extid=90bfe8a4ef62d8d308d1 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/5ea805477873/disk-1058ca9d.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/df6da7fc6701/vmlinux-1058ca9d.xz kernel image: https://storage.googleapis.com/syzbot-assets/f20b90dc3994/bzImage-1058ca9d.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+90bfe8a4ef62d8d308d1@syzkaller.appspotmail.com ------------[ cut here ]------------ WARNING: kernel/sched/core.c:10852 at sched_change_end+0x4f6/0x640 kernel/sched/core.c:10851, CPU#1: syz.6.795/8435 Modules linked in: CPU: 1 UID: 0 PID: 8435 Comm: syz.6.795 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:sched_change_end+0x4f6/0x640 kernel/sched/core.c:10851 Code: 00 74 26 48 83 c4 38 5b 41 5c 41 5d 41 5e 41 5f 5d e9 8e 5f cd 09 cc 90 0f 0b 90 e9 1d fc ff ff 90 0f 0b 90 e9 86 fc ff ff 90 <0f> 0b 90 eb d4 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 49 fb ff ff 48 RSP: 0000:ffffc9000441f850 EFLAGS: 00010046 RAX: 1ffff11004b43000 RBX: ffffffff8dba7b10 RCX: ffffffff8192ec5f RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff888025a18000 RBP: ffff888025a182a8 R08: ffff888025a18007 R09: 1ffff11004b43000 R10: dffffc0000000000 R11: ffffed1004b43001 R12: dffffc0000000000 R13: ffff888025a18000 R14: ffff8880b863ab00 R15: ffff888025a18000 FS: 00007f43893816c0(0000) GS:ffff888125d2a000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffc4765f9f8 CR3: 0000000031872000 CR4: 00000000003526f0 Call Trace: class_sched_change_destructor kernel/sched/sched.h:3956 [inline] rt_mutex_setprio+0x488/0xb70 kernel/sched/core.c:7331 rt_mutex_adjust_prio kernel/locking/rtmutex.c:539 [inline] remove_waiter+0x7f5/0xaf0 kernel/locking/rtmutex.c:1567 rt_mutex_cleanup_proxy_lock+0x6c/0x100 kernel/locking/rtmutex_api.c:458 futex_lock_pi+0x530/0xa90 kernel/futex/pi.c:1067 do_futex+0x292/0x420 kernel/futex/syscalls.c:146 __do_sys_futex kernel/futex/syscalls.c:207 [inline] __se_sys_futex+0x36f/0x400 kernel/futex/syscalls.c:188 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f438858f749 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f4389381038 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: ffffffffffffffda RBX: 00007f43887e5fa0 RCX: 00007f438858f749 RDX: 0000000000000002 RSI: 0000000000000086 RDI: 000020000000cffc RBP: 00007f4388613f91 R08: 0000000000000000 R09: 00000000fffffffc R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f43887e6038 R14: 00007f43887e5fa0 R15: 00007ffc0d485f98 --- 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