From nobody Sat Feb 7 21:08:30 2026 Received: from mail-il1-f200.google.com (mail-il1-f200.google.com [209.85.166.200]) (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 52AEB2DC33B for ; Mon, 3 Nov 2025 08:23:58 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.200 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762158239; cv=none; b=MLU5HG2A+rrLqS8NlIH/hnfEGZYyhlZZcKO4GPFj29rG8mfE8LPs0O4iFTN4V6cND4eRUxaSSPBfTMo9tAaUiW15wa+uI5jun06g1oIORs+WgaaaockRERUtbs9qUpy+MJCmx3ftsQ7fc6bGWNoiSHeQzMjuCHotlWircTp3QfI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762158239; c=relaxed/simple; bh=S/DTc/O6rMhMH6zAzV0ay+G2IMZ8KQmdwqkOUmY0+FQ=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=uMduHSH254KOYW6l1TjIU2TsoMnmWANx8Iqijk9oupouZyv8ngBm8SeZWIL4kibp2KGKaldC4lR7HWKIS+nKaetUiMbQYmXlbbFsekIMcADg1ZVpmM+Flb35rqnDYgPAofkaLX3dKcwhKY+zHGiD6dUmiGPoe9YRUHK/y1UDU8w= 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=209.85.166.200 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-f200.google.com with SMTP id e9e14a558f8ab-4333035774fso6472185ab.2 for ; Mon, 03 Nov 2025 00:23:58 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1762158237; x=1762763037; h=to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=++IReHIa7IiNwxKIKgozoAKwB3QVw95sQFg+MidWDL4=; b=pbrxazgm8/+yKVTRaGPxky9nwyzD8kft62ZbsDdUL1tlorEHZZpOzPgEhjY1JZC273 ubk8PvPqyjl2mERyQ3jiFgIb0GHFzExjwOgx/cheIQsDncoMQZ/wgw6wrhKbLJVXol4c htqQlogO3UXJY5E7azDYE7nCACD24xi2akDGRvE1e38vaug6nHW917xiehryA7y0yY7V BzHOQJOengauRES2GT+f8Qk6BEXUzUGOd7pAMKlcLOqvni5BrA4LzXonh2hH9PaNMt/5 w9VtSigM4Wj5fhkTHR0MXkGxPzpOmgBYlg1ozYZiEOUani6QFBCpszjIKHfph3p2rZmR 7pxQ== X-Gm-Message-State: AOJu0Yx29Cq6ZVUTRevbzdI2e20lR6NMl94B9SxuEk5zIfVHBJcOq85j C4h+5WUneJ7bWoUFKCl+/yT7QykFDgL2hetlAxny/dC5FLBzqEfUp50fKsx2UadulQGu9MxKhnK 2Sx4j6eFBDO6nyrFRVVbfxRNtBFPO0Uig7tnNMGlNcujsv0wrU7lj9R9F20c= X-Google-Smtp-Source: AGHT+IGumfiUd1MUWl5RGKrdWz71+mjqfdxg2cIQa5TXWkwOXR7I1y8m81BvpOrno4u5u/u9H4Tr4ZqR9zuHeiJaz8FH/6Z8w6Gb Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1a2e:b0:433:330a:a572 with SMTP id e9e14a558f8ab-433330aa64dmr14238865ab.13.1762158237513; Mon, 03 Nov 2025 00:23:57 -0800 (PST) Date: Mon, 03 Nov 2025 00:23:57 -0800 In-Reply-To: <6903e7f7.050a0220.3344a1.044c.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6908669d.050a0220.29fc44.0037.GAE@google.com> Subject: Forwarded: Re: [syzbot] [ext4?] WARNING in ext4_xattr_inode_update_ref (2) From: syzbot To: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" For archival purposes, forwarding an incoming command email to linux-kernel@vger.kernel.org. *** Subject: Re: [syzbot] [ext4?] WARNING in ext4_xattr_inode_update_ref (2) Author: lizhi.xu@windriver.com #syz test diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c index ce7253b3f549..5f535d45111b 100644 --- a/fs/ext4/xattr.c +++ b/fs/ext4/xattr.c @@ -1040,6 +1040,13 @@ static int ext4_xattr_inode_update_ref(handle_t *han= dle, struct inode *ea_inode, ret =3D -EFSCORRUPTED; goto out; } + if (overflows_type(ref_count + ref_change, u64)) { + ext4_error_inode(ea_inode, __func__, __LINE__, 0, + "EA inode %lu ref overflows: ref_count=3D%lld ref_change=3D%d", + ea_inode->i_ino, ref_count, ref_change); + ret =3D -EFSCORRUPTED; + goto out; + } ref_count +=3D ref_change; ext4_xattr_inode_set_ref(ea_inode, ref_count);