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 0A41E51C356; Wed, 23 Sep 2026 14:56:05 +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=1790175367; cv=none; b=f4gfQ2dT5zA1fT1yrrviLshtnsW5EJtwpKRyzTxipx4Eu1Jt6qCLDeBjaWjmQMGSzxo7OZgAs31UtFV2P8W5GD48RLe8uYGLRN8g/GMEvuZZGBoQSP43E1DoabFbCEuAFLxuDCmjXj7o8GeCZVLyIJN4zpdIpbY8waaTI6dK7qg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790175367; c=relaxed/simple; bh=hX1C3W0Iz/KgFKN52MhgBI0lwav6BtRpJor8YLSRckI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Xu9OsNnePV/9aB8+k49O/5XW+oNOB2jWBhCbSd3AgYASlSwmbra+FPucaCGApEj+z4c2nKllxeCSLG4XwGXMdXojCrzpWnPvlOHMloIEheydGw8Eu+RFJn76/52b8No/8udkB/IRT2E5O+FOROq+DaHxaIClxPfQHhqEpfZSclY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=ZgaGy5NP; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="ZgaGy5NP" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 623691F000FF; Wed, 23 Sep 2026 14:56:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1790175364; bh=42LCXrnTJ4yN42TwltehikNNuzdsR3IYuLrz9W8OuGE=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=ZgaGy5NPvVbj7UMcAorssgeWcF7HGq2ap5WSpZ7JNvLpB5D9P37kT2f3TujIj8IQc SFGMyyw/h/lzEdRkiYJLFgk5S4zAUP6BK8sqkDB+JqOzmbq/QvfAVwXW5w6YQw3v+u tH9/C89LVjLtknN5DQ43rsYzx/yivCvhNIFRuJHE= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Mobin Aydinfar , ChenXiaoSong , Namjae Jeon Subject: [PATCH 6.18 393/398] ksmbd: fix partial normalized name responses Date: Wed, 23 Sep 2026 16:07:47 +0200 Message-ID: <20260923140653.659790325@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260923140643.441954610@linuxfoundation.org> References: <20260923140643.441954610@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Namjae Jeon commit f4fafaf02174c32bce2f9bb4196fadf13f1fd96e upstream. 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_NORMALIZED_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 Reviewed-by: ChenXiaoSong Signed-off-by: Namjae Jeon Signed-off-by: Greg Kroah-Hartman --- fs/smb/server/smb2pdu.c | 3 +++ fs/smb/server/smb2pdu.h | 1 + 2 files changed, 4 insertions(+) --- a/fs/smb/server/smb2pdu.c +++ b/fs/smb/server/smb2pdu.c @@ -5542,6 +5542,9 @@ static int smb2_get_info_file(struct ksm case FILE_ALTERNATE_NAME_INFORMATION: fixed_len = FILE_ALTERNATE_NAME_INFORMATION_SIZE; break; + case FILE_NORMALIZED_NAME_INFORMATION: + fixed_len = FILE_NORMALIZED_NAME_INFORMATION_SIZE; + break; case FILE_STREAM_INFORMATION: fixed_len = FILE_STREAM_INFORMATION_SIZE; break; --- a/fs/smb/server/smb2pdu.h +++ b/fs/smb/server/smb2pdu.h @@ -213,6 +213,7 @@ struct file_sparse { #define FILE_ALLOCATION_INFORMATION_SIZE 19 #define FILE_END_OF_FILE_INFORMATION_SIZE 20 #define FILE_ALTERNATE_NAME_INFORMATION_SIZE 8 +#define FILE_NORMALIZED_NAME_INFORMATION_SIZE 8 #define FILE_STREAM_INFORMATION_SIZE 32 #define FILE_PIPE_INFORMATION_SIZE 23 #define FILE_PIPE_LOCAL_INFORMATION_SIZE 24