From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oo1-f72.google.com (mail-oo1-f72.google.com [209.85.161.72]) (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 02E3FEADC for ; Sun, 22 Feb 2026 08:16:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.161.72 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771748194; cv=none; b=szpmHUPWCwrNJp9ubmUivSX3PuCmqSq81MGEYq/xZ5k59X2Plx1HV5tRtWvXu63uuNIp/dc6UWTB+wykU27LrubD7YDQEs/4jr3WgtBRS9DayBzd0yqnK9uiZ3RryaM3V9P67zROt65NLze2UBrha7fqC5zIUAnIlGdlmGuYPWY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771748194; c=relaxed/simple; bh=3pL9ZoT7LoKSErSILWpERQv68LDgb9g/L2JzARLcbxM=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=RxDcv10oD8+sAV0iRu84lmO4GIBIsUTR6pCDsxPHMMLRMBDLG9Am6Y4QRK5tExvllfkff7CZuqw9lMjpqQD5C4jmthIdQgyvB70pcH9PrTEgj9hJ6gwvimU1/Isd4m9gG0v1Mftp38Hhbo17yObuN+w31igUXCd2ca141wUl/I4= 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=209.85.161.72 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-f72.google.com with SMTP id 006d021491bc7-6799654a158so21836046eaf.0 for ; Sun, 22 Feb 2026 00:16:32 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1771748192; x=1772352992; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=6U7d04dJRNMKwk6a8BhjZ4v64ipuXf0/k0nlflFqgQk=; b=OyPTg/ySLTzwxRWTG4pTCTbHG1GHP5c5gPzwYOP9lII5NjZrP+RPhKX0PcidjBdWxZ OYBW7ynvZgCr3guvBCKIt82R9OftyDSX40VVAR080nwtmzbM6iYj6kAvwdukxlZbu5bl xnUYbE+pIyG6N5/6oqW7QRuR+gxxCzwFT01DPB3AudWIIrsdqC3SEgkRXWy0QyLpO+B6 4/cJ3+Medxm5imhzon3lBVR4JzuCxJyw63GfPFr7SMdh5qge7tkdf9IyXLWzg+x17Y+F 3wxk2y/Q9zI7BWuyrE+nOceeU8YjcB8oDJHMgoSGPNfu5ZhHmAEv05jlFZnMQXiXiz5z uyzQ== X-Forwarded-Encrypted: i=1; AJvYcCWX48cmE22kel9vM/4TIFRaDbeb0zvvM+TXBwQBmoI5U4qWXdn/u02jKppO6MX2F5jEJXOWvs452fDS2w==@lists.linux.dev X-Gm-Message-State: AOJu0YxV9zvYPCRp/nPqafgrQX+RkJOt7FhAh6/Nl7taq4q5HB4rohhF iCzDXLXlbJrbyepERv/9THqm63Hv6Z/IcD0YKuO7ZaFa4OQ4IyJJ3ohrIxcML3nemrtG09miaAP EsY44xHR6j8rx5CLsu3+DEhOgaFt9Yv6v78XfP9a0oM6LTH3yQ4BH7ziWqAw= Precedence: bulk X-Mailing-List: ocfs2-devel@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:f031:b0:672:7d05:8225 with SMTP id 006d021491bc7-679c451c04emr2438273eaf.74.1771748192024; Sun, 22 Feb 2026 00:16:32 -0800 (PST) Date: Sun, 22 Feb 2026 00:16:32 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <699abb60.a70a0220.2c38d7.0171.GAE@google.com> Subject: [syzbot] [ocfs2?] kernel BUG in ocfs2_xattr_value_truncate (2) From: syzbot To: jlbec@evilplan.org, joseph.qi@linux.alibaba.com, linux-kernel@vger.kernel.org, mark@fasheh.com, ocfs2-devel@lists.linux.dev, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 2961f841b025 Merge tag 'turbostat-2026.02.14' of git://git.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=10e3bee6580000 kernel config: https://syzkaller.appspot.com/x/.config?x=65722f41f7edc17e dashboard link: https://syzkaller.appspot.com/bug?extid=e538032956b1157914a3 compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 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-2961f841.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/19ffd1a88c42/vmlinux-2961f841.xz kernel image: https://storage.googleapis.com/syzbot-assets/621dc0fadd96/bzImage-2961f841.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+e538032956b1157914a3@syzkaller.appspotmail.com loop0: detected capacity change from 32768 to 0 ------------[ cut here ]------------ kernel BUG at fs/ocfs2/xattr.c:747! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI CPU: 0 UID: 0 PID: 5327 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:ocfs2_xattr_extend_allocation fs/ocfs2/xattr.c:747 [inline] RIP: 0010:ocfs2_xattr_value_truncate+0x178b/0x1790 fs/ocfs2/xattr.c:868 Code: 44 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c 51 eb ff ff 4c 89 ff 48 89 f3 e8 03 4e 5d fe 48 89 de e9 3e eb ff ff e8 66 b4 f1 fd 90 <0f> 0b 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 RSP: 0018:ffffc9000f64e920 EFLAGS: 00010287 RAX: ffffffff83d3e31a RBX: 0000000000000002 RCX: 0000000000100000 RDX: ffffc90020802000 RSI: 0000000000001a65 RDI: 0000000000001a66 RBP: ffffc9000f64ec50 R08: ffff888035132480 R09: 0000000000000006 R10: 00000000fffffffc R11: 0000000000000002 R12: 0000000000000002 R13: 00000000fffffff5 R14: 0000000000000000 R15: ffff888056fa93d0 FS: 00007f0d56df56c0(0000) GS:ffff88808ca5b000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000491000 CR3: 000000001fc51000 CR4: 0000000000352ef0 Call Trace: ocfs2_xa_value_truncate+0x2a5/0x3f0 fs/ocfs2/xattr.c:1945 ocfs2_xa_prepare_entry fs/ocfs2/xattr.c:2204 [inline] ocfs2_xa_set+0x238e/0x2ec0 fs/ocfs2/xattr.c:2282 ocfs2_xattr_block_set+0x3e0/0x3480 fs/ocfs2/xattr.c:3016 __ocfs2_xattr_set_handle+0x6b3/0xf50 fs/ocfs2/xattr.c:3418 ocfs2_xattr_set+0xf3f/0x13e0 fs/ocfs2/xattr.c:3681 __vfs_setxattr+0x43c/0x480 fs/xattr.c:200 __vfs_setxattr_noperm+0x12d/0x660 fs/xattr.c:234 vfs_setxattr+0x163/0x360 fs/xattr.c:321 do_setxattr fs/xattr.c:636 [inline] filename_setxattr+0x296/0x630 fs/xattr.c:664 path_setxattrat+0x3eb/0x440 fs/xattr.c:708 __do_sys_lsetxattr fs/xattr.c:749 [inline] __se_sys_lsetxattr fs/xattr.c:745 [inline] __x64_sys_lsetxattr+0xbf/0xe0 fs/xattr.c:745 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f0d5a99c629 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:00007f0d56df5028 EFLAGS: 00000246 ORIG_RAX: 00000000000000bd RAX: ffffffffffffffda RBX: 00007f0d5ac16180 RCX: 00007f0d5a99c629 RDX: 0000200000000480 RSI: 00002000000000c0 RDI: 0000200000000100 RBP: 00007f0d5aa32b39 R08: 0000000000000000 R09: 0000000000000000 R10: 000000000000fe37 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f0d5ac16218 R14: 00007f0d5ac16180 R15: 00007ffd722eb838 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:ocfs2_xattr_extend_allocation fs/ocfs2/xattr.c:747 [inline] RIP: 0010:ocfs2_xattr_value_truncate+0x178b/0x1790 fs/ocfs2/xattr.c:868 Code: 44 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c 51 eb ff ff 4c 89 ff 48 89 f3 e8 03 4e 5d fe 48 89 de e9 3e eb ff ff e8 66 b4 f1 fd 90 <0f> 0b 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 RSP: 0018:ffffc9000f64e920 EFLAGS: 00010287 RAX: ffffffff83d3e31a RBX: 0000000000000002 RCX: 0000000000100000 RDX: ffffc90020802000 RSI: 0000000000001a65 RDI: 0000000000001a66 RBP: ffffc9000f64ec50 R08: ffff888035132480 R09: 0000000000000006 R10: 00000000fffffffc R11: 0000000000000002 R12: 0000000000000002 R13: 00000000fffffff5 R14: 0000000000000000 R15: ffff888056fa93d0 FS: 00007f0d56df56c0(0000) GS:ffff88808ca5b000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0d565d1ff8 CR3: 000000001fc51000 CR4: 0000000000352ef0 --- 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