From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f207.google.com (mail-il1-f207.google.com [209.85.166.207]) (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 2B0B628D8FB for ; Wed, 4 Jun 2025 12:13:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.207 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749039223; cv=none; b=o0or8PslDGJiHeXB9No20DZ59pAlEi3l8w0JKhIrSRs6xpH12hE91vciAiYgA/Slj67SrJlMKuG1kQbKi8oqAaxjuVVWzSZ4sgJsPhWeqLOiyfV+CuwI+W32H6vSrbevrF38CmjcMxk6v8kE19Dzq3SbasO0LJnhV0q/6mR2IQY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749039223; c=relaxed/simple; bh=l/tgeUW9ZxWkBuGuZhUNYwAeSn3krAwQzrrUkzZ4wj0=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=fXroxaTRobhUiE+jpSQE02SfDrcentWAEPiv+ImjrzxcrypH+MmD0zu7EEpC5/gaYB6MuUSwDXrza2fqSWddYFcFmyS/YFlvs0ls8i2smJ7r2CtmQlIvtTU2vVbloiVTAemQlaztMokbl1WRmxVeU5LzbM3GIkOTcp80v4Iv5UE= 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=209.85.166.207 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-f207.google.com with SMTP id e9e14a558f8ab-3ddc07eea46so4712695ab.0 for ; Wed, 04 Jun 2025 05:13:41 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1749039221; x=1749644021; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=CzajI+MYpH3SgRs9ff/pJQ6x8nBJe2DTOmSzXzu4lqg=; b=X5GC8Xt82RH2HKP9lQbyRWxaDaM6Dh3/1cd95wdnAtbXssxHcOaCw5lubFJ2ONTzQS vFYX8ucQCRk9dGyyDe+hXS0NoXuku42RoF8XzkbAIT0xi8pBoh1BiNd8uYiikEq08FBB 5GxIDy8Is1WTnA3PT/2pAWbLGMADWt+IbOeRfenHtq4IWM3el7KACfCwcd/n4P2oathE Ldy3fxOnH0yKACyRUaD8MBZObq2XA+28Z/zJQZ8q5RrDFlUiap+VhKlOb+rvajJ/9Cc8 r2aRPhNtG2z561oQxzvIieLQeJ/JD374cYXeYB6H3+KigB4Zo01GFVVr6PySpAKzZXtM JdsA== X-Gm-Message-State: AOJu0Yw/K/ZJbgsrtF3uY45RgWGxZmGppH69fwAhG9HJv63oBMFELoaR ZKYZNX3gFKZaugKiIJVh6rzmGgpb1SYnoejMqihGP++zwTce8nsOPA4jRPmQwQ6BzTSjhPh5Q4/ bTa1nZ6aEisdxeNUNbotA/r0Y08opXlCV9YrNEXmjAW/ZSbKmsa3n0i4uISZO/g== X-Google-Smtp-Source: AGHT+IEGPEDHtyiuVX0WqAOQbTgWXRbowiKe0WnfH17r6Ih6V1RLgxslPgXXOvL+SoXMwK0pVeGoy4Tc3tkL8CL2X6FaMcEtNXZs Precedence: bulk X-Mailing-List: cgroups@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1a87:b0:3dd:8136:a687 with SMTP id e9e14a558f8ab-3ddbebd825emr25413805ab.8.1749039221210; Wed, 04 Jun 2025 05:13:41 -0700 (PDT) Date: Wed, 04 Jun 2025 05:13:41 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <68403875.a00a0220.d4325.000a.GAE@google.com> Subject: [syzbot] [cgroups?] BUG: unable to handle kernel paging request in css_rstat_flush From: syzbot To: cgroups@vger.kernel.org, hannes@cmpxchg.org, linux-kernel@vger.kernel.org, mkoutny@suse.com, syzkaller-bugs@googlegroups.com, tj@kernel.org Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 4cb6c8af8591 selftests/filesystems: Fix build of anon_inod.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=17967ed4580000 kernel config: https://syzkaller.appspot.com/x/.config?x=43b7075a5c42ffca dashboard link: https://syzkaller.appspot.com/bug?extid=36ca05bdc071f7ba8f75 compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=170d9970580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13e88c82580000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-4cb6c8af.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/91b28032d866/vmlinux-4cb6c8af.xz kernel image: https://storage.googleapis.com/syzbot-assets/7cf2a9f8c096/bzImage-4cb6c8af.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+36ca05bdc071f7ba8f75@syzkaller.appspotmail.com BUG: unable to handle page fault for address: ffffed1011a4ca01 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 5ffcd067 P4D 5ffcd067 PUD 2fff7067 PMD 0 Oops: Oops: 0000 [#1] SMP KASAN NOPTI CPU: 0 UID: 0 PID: 5328 Comm: kworker/0:3 Not tainted 6.15.0-syzkaller-10402-g4cb6c8af8591 #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Workqueue: cgroup_destroy css_free_rwork_fn RIP: 0010:css_rstat_updated_list kernel/cgroup/rstat.c:284 [inline] RIP: 0010:css_rstat_flush+0x5ff/0x1fa0 kernel/cgroup/rstat.c:413 Code: 1e 75 d1 0d 01 0f 85 e6 14 00 00 e8 1b 1e 07 00 4c 03 6c 24 20 4d 8d 7d 08 4c 89 fb 48 c1 eb 03 48 b8 00 00 00 00 00 fc ff df <80> 3c 03 00 74 08 4c 89 ff e8 e3 51 6a 00 49 83 3f 00 0f 84 5d 01 RSP: 0018:ffffc9000d68f780 EFLAGS: 00010802 RAX: dffffc0000000000 RBX: 1ffff11011a4ca01 RCX: ffff88801f4ea440 RDX: 0000000000000000 RSI: ffffffff8be266a0 RDI: ffffffff8be26660 RBP: ffffc9000d68f9b8 R08: ffffffff8fa0aaf7 R09: 1ffffffff1f4155e R10: dffffc0000000000 R11: fffffbfff1f4155f R12: ffff88801fc42590 R13: ffff88808d265000 R14: 0000000000000000 R15: ffff88808d265008 FS: 0000000000000000(0000) GS:ffff88808d265000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffed1011a4ca01 CR3: 0000000042fe0000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: css_rstat_exit+0xa9/0x320 kernel/cgroup/rstat.c:479 css_free_rwork_fn+0x8b/0xc50 kernel/cgroup/cgroup.c:5449 process_one_work kernel/workqueue.c:3238 [inline] process_scheduled_works+0xade/0x17b0 kernel/workqueue.c:3321 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402 kthread+0x711/0x8a0 kernel/kthread.c:464 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Modules linked in: CR2: ffffed1011a4ca01 ---[ end trace 0000000000000000 ]--- RIP: 0010:css_rstat_updated_list kernel/cgroup/rstat.c:284 [inline] RIP: 0010:css_rstat_flush+0x5ff/0x1fa0 kernel/cgroup/rstat.c:413 Code: 1e 75 d1 0d 01 0f 85 e6 14 00 00 e8 1b 1e 07 00 4c 03 6c 24 20 4d 8d 7d 08 4c 89 fb 48 c1 eb 03 48 b8 00 00 00 00 00 fc ff df <80> 3c 03 00 74 08 4c 89 ff e8 e3 51 6a 00 49 83 3f 00 0f 84 5d 01 RSP: 0018:ffffc9000d68f780 EFLAGS: 00010802 RAX: dffffc0000000000 RBX: 1ffff11011a4ca01 RCX: ffff88801f4ea440 RDX: 0000000000000000 RSI: ffffffff8be266a0 RDI: ffffffff8be26660 RBP: ffffc9000d68f9b8 R08: ffffffff8fa0aaf7 R09: 1ffffffff1f4155e R10: dffffc0000000000 R11: fffffbfff1f4155f R12: ffff88801fc42590 R13: ffff88808d265000 R14: 0000000000000000 R15: ffff88808d265008 FS: 0000000000000000(0000) GS:ffff88808d265000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffed1011a4ca01 CR3: 0000000042fe0000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 5 bytes skipped: 0: 0f 85 e6 14 00 00 jne 0x14ec 6: e8 1b 1e 07 00 call 0x71e26 b: 4c 03 6c 24 20 add 0x20(%rsp),%r13 10: 4d 8d 7d 08 lea 0x8(%r13),%r15 14: 4c 89 fb mov %r15,%rbx 17: 48 c1 eb 03 shr $0x3,%rbx 1b: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 22: fc ff df * 25: 80 3c 03 00 cmpb $0x0,(%rbx,%rax,1) <-- trapping instruction 29: 74 08 je 0x33 2b: 4c 89 ff mov %r15,%rdi 2e: e8 e3 51 6a 00 call 0x6a5216 33: 49 83 3f 00 cmpq $0x0,(%r15) 37: 0f .byte 0xf 38: 84 5d 01 test %bl,0x1(%rbp) --- 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 syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. 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