From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi2-f1.google.com (mail-oi2-f1.google.com [74.125.231.193]) (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 4ED10488205 for ; Tue, 25 Aug 2026 15:41:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.231.193 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787672501; cv=none; b=H1JD1kStieE2K0mYy2RQ5mJ8bGpxIV0bhb4Ol0fRq1diNljzFFWAB9BeKiR56CvdhZYT2d4jlYF00698T9N0yZkx5cKhNhGplu7STrco/Z8KXi6GR3aHCyKOGsNeqdAp59CnrCcP7w5ZCjHuI435VygPKux2LBt9DTTCdSSl+jI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787672501; c=relaxed/simple; bh=vN3QAIFtSIu/2my/ILcppHph3GsMyCRxw7A/aJvAKuI=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=p9w4wBtTbZZsLzW8YW4hoZg5Q8LH2N7c9Im6GbNmqkriq7yeRoqTutR+B2EO672FyUHme264ass55Bo3HT2sDZ+/lRP/t4mn3CheXt+YUuLPxoCMru1uMcSinL76kDPMyy8rKHoBzBqu/G5irlMbl48llNFik3Urphql6ne8Y6M= 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=74.125.231.193 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-oi2-f1.google.com with SMTP id 5614622812f47-4960a23d5e1so1840308b6e.1 for ; Tue, 25 Aug 2026 08:41:39 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1787672498; x=1788277298; h=content-type:to:from:subject:message-id:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=GC0sT688CMPZIAFu0nGVPNVXVksF+ly+uwSWiBgBdgw=; b=oOrBGJMI3/uGsfxgO5iHdcaj4pQ2TbJOL34/rUc1bA/3cNwpRuCQSK6copGncyxgTx rmMiuEGeO9qzJyXg2zWRGRcIvCS59evhbc7xyxGtyDfMxTrFL2tFWUkKHNUbLSbj4hRg D+pePXUU1V0AJ3QLnKuU6fHs+FfTjAW1RWDQcbRYbC0AWmWR2ZOxirz8LPe1NRPdSYcN pdQDE3WaxE5qY+bBBXe9WgwFdEVm//u5eR7tE/FhAD7ir1OcH0fViWVWHfg8aMhTmLxy SZcuTAwZu9k5vMOSzigAk1yADFchz6kFhGnx5OZKsKmYcHVPdUDaCx95wIM8xcKQcMmB ySGQ== X-Forwarded-Encrypted: i=1; AHgh+RoxO/70wOV46xktBczHf9G0I3eYOR7xcLqrAAUm3LlcUF6ED7B2dv95oHK3Jolc+pJJKrQtuIHQ1yrZ+Sc=@vger.kernel.org X-Gm-Message-State: AFuF++kH6nhowwCaiMHf2TECm2qMoTRER0IrIaPVSqj5H7hfpLKi++bg gMm4asNanlR7qDJf9XHsgUuqU+0CMlgRLc9GjvPx9lLp+SEC1y6wuJ0PgcPHjmLpxJ8uDbwTIvE xCOZp9TUeNKZkF1O+XnIE4DnipgM9IwBI1M/Kku/Cy+9GF3uP8X223SzhAuw= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:c40b:b0:4b2:8d7b:390b with SMTP id 5614622812f47-4b309bb4709mr26186547b6e.19.1787672498170; Tue, 25 Aug 2026 08:41:38 -0700 (PDT) Date: Tue, 25 Aug 2026 08:41:38 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a8db7b2.a5a502ce.31d34.006c.GAE@google.com> Subject: [syzbot] [btrfs?] WARNING in btrfs_quota_enable (2) From: syzbot To: clm@fb.com, dsterba@suse.com, linux-btrfs@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 818bebeb63dd drm/xe: Don't hand out the flat CCS storage a.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=13da3e79580000 kernel config: https://syzkaller.appspot.com/x/.config?x=3c35c7e43de75adb dashboard link: https://syzkaller.appspot.com/bug?extid=11ac036337245d7faf6d compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-818bebeb.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/9adea981957f/vmlinux-818bebeb.xz kernel image: https://storage.googleapis.com/syzbot-assets/6676075cd03e/bzImage-818bebeb.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+11ac036337245d7faf6d@syzkaller.appspotmail.com ------------[ cut here ]------------ btrfs_abort_should_print_stack(__error) WARNING: fs/btrfs/qgroup.c:1077 at btrfs_quota_enable+0x1acf/0x1e20 fs/btrfs/qgroup.c:1077, CPU#0: syz.0.0/5316 Modules linked in: CPU: 0 UID: 0 PID: 5316 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 RIP: 0010:btrfs_quota_enable+0x1acf/0x1e20 fs/btrfs/qgroup.c:1077 Code: 08 00 00 00 4c 89 e7 e8 4f fe 04 fe e9 3c e7 ff ff e8 65 53 aa 07 e8 90 b4 93 fd eb 10 e8 89 b4 93 fd eb 09 e8 82 b4 93 fd 90 <0f> 0b 90 4c 8b 64 24 20 44 89 e1 f7 d9 e9 eb f9 ff ff 44 89 f7 48 RSP: 0018:ffffc9000de77c80 EFLAGS: 00010283 RAX: ffffffff8433803e RBX: ffffffffffffffe4 RCX: 0000000000100000 RDX: ffffc9000f4b9000 RSI: 00000000000020b8 RDI: 00000000000020b9 RBP: ffffc9000de77e70 R08: ffff88800029cb00 R09: 0000000000000003 R10: 00000000fffffffb R11: 0000000000000002 R12: 0000000000000000 R13: dffffc0000000000 R14: ffff888052295a00 R15: ffffc9000de77d90 FS: 00007f86714146c0(0000) GS:ffff88808c30a000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f86713f2fe8 CR3: 0000000039d60000 CR4: 0000000000352ef0 Call Trace: btrfs_ioctl_quota_ctl+0x186/0x1f0 fs/btrfs/ioctl.c:3566 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f867059e0d9 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:00007f8671413fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f8670826090 RCX: 00007f867059e0d9 RDX: 00002000000000c0 RSI: 00000000c0109428 RDI: 0000000000000003 RBP: 00007f8670635024 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f8670826128 R14: 00007f8670826090 R15: 00007ffd6c070158 --- 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