From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oo1-f71.google.com (mail-oo1-f71.google.com [209.85.161.71]) (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 B6A84371CE3 for ; Wed, 4 Mar 2026 20:35:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.161.71 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772656545; cv=none; b=MqA94NIyO/KQus8lrbzJOTa5tlr78I2nHRT9xWUNcHuBcuG9sdP+066EMTJT+AcCldhX0fKPlaYG0xd95/9bGQIOdh1+0JGLlOuKkgYWPmYG5SfDleXxm8cc/797ZXKKkxoUjAOfDtJKH9QjXaRTcUYTSJJhLL4udRmTLm8qZ+k= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772656545; c=relaxed/simple; bh=tg458HTsIG8Njxjr9c0jfPWY1FvhtDP+DnMTXOyDal0=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=pJo32TaPC3m7f9w0jiChJKb5O7syFesunpa3vpH99+LZpwskrVM1acZOtFC+fvBLM9pR49JMblkT0FVi6ZD5udnPoqtFPyNYjqzUX31dFrxwp2MMNsxLuCzG7zv/rcWQCp7D1KSSc5Fy3erz551wX950TuBN+x/YpRZuRrdlKrU= 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=209.85.161.71 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-f71.google.com with SMTP id 006d021491bc7-679c5fde4c7so133861131eaf.0 for ; Wed, 04 Mar 2026 12:35:43 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1772656542; x=1773261342; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=0OnyWyAQ6MOz0Le7mA5AZTdVMLeLZfg1O2Vk5ubIZa4=; b=Vyh2XWkUnEW6iiYLDs7GQkxiXljyBjN3nUTKg/Ce0tlUlfeAn9ILoIEyerqR0KGheq GEWG22Ou7EGscEUrnYyvCCM/vdSTYryxX8YjNGzRAZztdQwj+gMBLwwVdEwPUpsaW/Zw r4FTFAcUWW2iz3HCoSx6sB0SH1LHXhAM+HyOkp1ZmpXvp96a1uzaWH9fgThWPoJlgSyP uHVW1HiFnJAINNH+tZiTy9JYGdXKp9jUtlo7yEvSZu8lz+JcfRLKzdMYZwt0p7ASZzBo ibpTlb32ARn+s0HePU8F+jt89I2QSRBlYiqB7Ikq1dLAVeLazq5orwRiUxCv0jRsAr08 Ec6g== X-Forwarded-Encrypted: i=1; AJvYcCUp9LRhujGy1UX215TuOq+h5eNlRCDeqK4ASaH0Mu7rsZ9Pzb5QuGqAAJ8574tVWtTaESBfTyKKI9ih3EQ=@vger.kernel.org X-Gm-Message-State: AOJu0YwJTDym3cOR6UqBjv/zozUXrui0+GIcYFhPRF4PpV9KtdrK56R9 ohXkT8S/GaAITr7RwYSXLqFezxecU3Djm1TGbkph80qA637BNPl+9B+7mMbsrGmIS+gwvqcoz7f nM5tvAI+qPJrMF1tx9SNzIZM2GmUpnroOnvJXfQug37ue4u5bteHEhHu8bE8= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:228d:b0:662:f8a9:9ec with SMTP id 006d021491bc7-67b1e8fea5amr1862688eaf.56.1772656542664; Wed, 04 Mar 2026 12:35:42 -0800 (PST) Date: Wed, 04 Mar 2026 12:35:42 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69a8979e.a70a0220.b118c.0025.GAE@google.com> Subject: [syzbot] [kernel?] WARNING in __static_key_slow_dec_cpuslocked (3) From: syzbot To: ardb@kernel.org, jbaron@akamai.com, jpoimboe@kernel.org, linux-kernel@vger.kernel.org, peterz@infradead.org, rostedt@goodmis.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 4d310797262f Merge tag 'pm-6.19-rc8' of git://git.kernel.o.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=16b5045a580000 kernel config: https://syzkaller.appspot.com/x/.config?x=df890e720d1bb80 dashboard link: https://syzkaller.appspot.com/bug?extid=feb9ce36a95341bb47a4 compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/bd4c893282fd/disk-4d310797.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/0e6e33a27e48/vmlinux-4d310797.xz kernel image: https://storage.googleapis.com/syzbot-assets/457b27877eef/bzImage-4d310797.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+feb9ce36a95341bb47a4@syzkaller.appspotmail.com ------------[ cut here ]------------ val == 0 WARNING: kernel/jump_label.c:311 at __static_key_slow_dec_cpuslocked.part.0+0x107/0x120 kernel/jump_label.c:311, CPU#0: syz.1.3155/20288 Modules linked in: CPU: 0 UID: 0 PID: 20288 Comm: syz.1.3155 Tainted: G U L syzkaller #0 PREEMPT(full) Tainted: [U]=USER, [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026 RIP: 0010:__static_key_slow_dec_cpuslocked.part.0+0x107/0x120 kernel/jump_label.c:311 Code: f2 c9 ff 5b 5d c3 cc cc cc cc e8 54 f2 c9 ff 48 89 df e8 ac f9 ff ff eb ad e8 45 f2 c9 ff 90 0f 0b 90 eb a2 e8 3a f2 c9 ff 90 <0f> 0b 90 eb 97 48 89 df e8 5c 4b 33 00 e9 36 ff ff ff 0f 1f 80 00 RSP: 0018:ffffc9000b9f7c10 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffffffff9b3e5d40 RCX: ffffffff823c57b4 RDX: ffff8880285a0000 RSI: ffffffff823c5846 RDI: ffff8880285a0000 RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 000000000000000a R13: 1ffff9200173ef88 R14: 0000000000000001 R15: ffffc9000b9f7e98 FS: 00007f530dd726c0(0000) GS:ffff8881245e3000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000001140 CR3: 000000007cc4a000 CR4: 00000000003526f0 Call Trace: __static_key_slow_dec_cpuslocked kernel/jump_label.c:297 [inline] __static_key_slow_dec kernel/jump_label.c:321 [inline] static_key_slow_dec+0x7c/0xc0 kernel/jump_label.c:336 aql_enable_write+0x2b2/0x310 net/mac80211/debugfs.c:343 short_proxy_write+0x133/0x1a0 fs/debugfs/file.c:383 vfs_write+0x2aa/0x1070 fs/read_write.c:684 ksys_pwrite64 fs/read_write.c:793 [inline] __do_sys_pwrite64 fs/read_write.c:801 [inline] __se_sys_pwrite64 fs/read_write.c:798 [inline] __x64_sys_pwrite64+0x1eb/0x250 fs/read_write.c:798 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xc9/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f530cf9aeb9 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f530dd72028 EFLAGS: 00000246 ORIG_RAX: 0000000000000012 RAX: ffffffffffffffda RBX: 00007f530d215fa0 RCX: 00007f530cf9aeb9 RDX: 0000000000000003 RSI: 0000000000000000 RDI: 0000000000000010 RBP: 00007f530d008c1f R08: 0000000000000000 R09: 0000000000000000 R10: 4200000000000005 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f530d216038 R14: 00007f530d215fa0 R15: 00007ffde89fb978 --- 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