From nobody Sun Oct 5 01:52:57 2025 Received: from www262.sakura.ne.jp (www262.sakura.ne.jp [202.181.97.72]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AD8F12D63E5; Mon, 11 Aug 2025 06:50:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=202.181.97.72 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1754895044; cv=none; b=CJvHGsamropZCC9Y4zRpX+xXgLTIX3GkNpdQnwy0tpuEXhRDPoivAoz/iD/z9DBRh0JFM6yXbNDqxMZkUVavIVlXk/+5Nvz+MGKqSWu4p+NLTnP+hwSp0R579oTyusPlw9vy52ByVX875SSPIcjizm+t9K+Cp35XO2HSmZoTJ1Y= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1754895044; c=relaxed/simple; bh=VCyAlTuUnhXaDYpfNxL+t/XJTPx/5KAlsAChG7OYHR8=; h=Message-ID:Date:MIME-Version:To:Cc:From:Subject:Content-Type; b=MVE3VlJC3MVJYWSUw0uEifDwbRBQdRhY5w52kyaB72ciS5D1gdkZI3DES8RjXoXW0jaMj2rmAYdHMd+ID+qkdY1X6LRAmaUFJH4ESA4jjzQtraZXskQ/YoMRkshWJa0byvI5KljZ6+gtxqbh03+rHDTU9gmlAwOCmxOxzAiX5fg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=I-love.SAKURA.ne.jp; spf=pass smtp.mailfrom=I-love.SAKURA.ne.jp; arc=none smtp.client-ip=202.181.97.72 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=I-love.SAKURA.ne.jp Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=I-love.SAKURA.ne.jp Received: from www262.sakura.ne.jp (localhost [127.0.0.1]) by www262.sakura.ne.jp (8.15.2/8.15.2) with ESMTP id 57B6oRqp035409; Mon, 11 Aug 2025 15:50:27 +0900 (JST) (envelope-from penguin-kernel@I-love.SAKURA.ne.jp) Received: from [192.168.1.10] (M106072142033.v4.enabler.ne.jp [106.72.142.33]) (authenticated bits=0) by www262.sakura.ne.jp (8.15.2/8.15.2) with ESMTPSA id 57B6oRkP035405 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NO); Mon, 11 Aug 2025 15:50:27 +0900 (JST) (envelope-from penguin-kernel@I-love.SAKURA.ne.jp) Message-ID: Date: Mon, 11 Aug 2025 15:50:28 +0900 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Content-Language: en-US To: Alexander Viro , Christian Brauner , Jan Kara , Mateusz Guzik Cc: linux-fsdevel , LKML From: Tetsuo Handa Subject: [PATCH] vfs: show filesystem name at dump_inode() Content-Transfer-Encoding: quoted-printable X-Virus-Status: clean X-Anti-Virus-Server: fsav202.rs.sakura.ne.jp Content-Type: text/plain; charset="utf-8" Commit 8b17e540969a ("vfs: add initial support for CONFIG_DEBUG_VFS") added dump_inode(), but dump_inode() currently reports only raw pointer address. Comment says that adding a proper inode dumping routine is a TODO. However, syzkaller concurrently tests multiple filesystems, and several filesystems started calling dump_inode() due to hitting VFS_BUG_ON_INODE() added by commit af153bb63a33 ("vfs: catch invalid modes in may_open()") before a proper inode dumping routine is implemented. Show filesystem name at dump_inode() so that we can find which filesystem has passed an invalid mode to may_open() from syzkaller's crash reports. Link: https://syzkaller.appspot.com/bug?extid=3D895c23f6917da440ed0d Signed-off-by: Tetsuo Handa --- fs/inode.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/inode.c b/fs/inode.c index 01ebdc40021e..8a60aec94245 100644 --- a/fs/inode.c +++ b/fs/inode.c @@ -2914,7 +2914,7 @@ EXPORT_SYMBOL(mode_strip_sgid); */ void dump_inode(struct inode *inode, const char *reason) { - pr_warn("%s encountered for inode %px", reason, inode); + pr_warn("%s encountered for inode %px (%s)\n", reason, inode, inode->i_sb= ->s_type->name); } =20 EXPORT_SYMBOL(dump_inode); --=20 2.50.1