From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 C18763E8C77 for ; Sun, 13 Sep 2026 11:35:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789299360; cv=none; b=GR8t/dTMRBETBsuFiKOAekTQCyjzt/y9xtjrPXTZvsj7DSSPyv5sNF7jXpd2YyjjXRCohtJPVId1YX01iZbQU3A+rylsTKAfSsDuieOkSc4dl0BWSQHIFV+QxY+6nNvmozVe0q7rXOt8/OQbnXM7x2Jy2AggTXrNHyZyC79M5Zc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789299360; c=relaxed/simple; bh=xI4ipDaPmNP4RWvPg1NvpZwJw3eeyk+E+RUDI6mmHn0=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=fc1lp5pNY6xfTchAuM3JDVPwiHAlr+7ZbiZmKwc4ExvNJPPNkMXzJ3pZ3huxqWvGtDdtTpXu0BnRzEunGsKEwe/dBEg6j8wEYmBT3VKifYHIukE5H/Vj5H/M3147kMsXKfJOTOieIYK9q4obEHnSIHPGHwXyLzLh7P8FMriN8RE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Ap4YXbdD; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Ap4YXbdD" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8A3C91F00893; Sun, 13 Sep 2026 11:35:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789299356; bh=icFbRItDWb+jES6cZwUxWpmh1GcQ4nJXYyZnIgyiz6U=; h=From:To:Cc:Subject:Date; b=Ap4YXbdD5mUkW9AtBB5Aqi3plQFgIOjIR4zC7Gj2cVgCObOCYVXeAMszxDQWh9C2k l7SfwQnoZXA8LlTU/rTi8lxnyCavQ63+UfEfykqpRVGs6otazww3NKfvtfCzvtdut9 i4RyTRfDcksJ5xzFgym+0FVpJnhPvkNmvlObdgL4nhW3WpcEXVwFM6xVNcq0HVoyVT Dq+/r/Is0TB5b/2/C5Qj1nmSZvSufmiL4RimBoGuGhr1QZOi4vu2BDpDhE0Jt3rUze /jop2l2uDJr6aLHAY6gELobnSMTsvw9V6Bob/A9caESFso8FbL78H/d/HrgqYFDndF LshGXaK+aEjvQ== From: Namjae Jeon To: linux-cifs@vger.kernel.org Cc: senozhatsky@chromium.org, tom@talpey.com, atteh.mailbox@gmail.com, chenxiaosong@chenxiaosong.com, chenxiaosong@kylinos.cn, Namjae Jeon , Mobin Aydinfar Subject: [PATCH 2/3] ksmbd: fix partial normalized name responses Date: Sun, 13 Sep 2026 20:35:52 +0900 Message-Id: <20260913113552.11486-1-linkinjeon@kernel.org> X-Mailer: git-send-email 2.25.1 Precedence: bulk X-Mailing-List: linux-cifs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Windows may request FILE_NORMALIZED_NAME_INFORMATION with an output buffer that only fits the fixed portion of the variable-length response. Treat the fixed portion as FILE_ALTERNATE_NAME_INFORMATION_SIZE so ksmbd returns STATUS_BUFFER_OVERFLOW instead of STATUS_INFO_LENGTH_MISMATCH. This avoids rejecting valid partial normalized-name responses. Fixes: 6b8b79226bc3 ("ksmbd: fix partial file information responses") Reported-by: Mobin Aydinfar Signed-off-by: Namjae Jeon --- fs/smb/server/smb2pdu.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/fs/smb/server/smb2pdu.c b/fs/smb/server/smb2pdu.c index f4d96799e1d2..38cddbf3e6ed 100644 --- a/fs/smb/server/smb2pdu.c +++ b/fs/smb/server/smb2pdu.c @@ -7318,6 +7318,9 @@ static int smb2_get_info_file(struct ksmbd_work *work, case FILE_ALTERNATE_NAME_INFORMATION: fixed_len = FILE_ALTERNATE_NAME_INFORMATION_SIZE; break; + case FILE_NORMALIZED_NAME_INFORMATION: + fixed_len = FILE_ALTERNATE_NAME_INFORMATION_SIZE; + break; case FILE_STREAM_INFORMATION: fixed_len = FILE_STREAM_INFORMATION_SIZE; break; -- 2.25.1