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 4494C535FC3; Wed, 23 Sep 2026 14:35:33 +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=1790174134; cv=none; b=IOV3mZBQa+7gcnUyuD5m8fcob3WdFTIrteiThKdcP1a079fWrymXT15cP5hhFLxpjao5nQmxAF5YYQAUVmIWmoLMGoNJIDNmqVbjqoSNf4GN3hHFjZBfzmsh78wZoAYLeQW6J8aPxMRC62ucLLX767j4jzMsWN0NIlpF+vhxG3I= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790174134; c=relaxed/simple; bh=9ja9QIbN3Gq+tZdm5i9UzqPqm0Qjo7O0Y2zoTiYirQo=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=bZ9nQLaAEUkr/eBpdxxyANGh54AMfpEURzN+mGlyLxq7ayU3OZZuaU6XLPH1Vv62tEOK+OQCvv2bQQ2SiK6dI5kBhyRTc02o6bZgVSxdlOXD8BGlIr2KVl4i98wjKfXu4Wy0npsxoreemJe+Wfdkbf4hzdcSEr+16goko/wvVho= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=z4DrR5LR; 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="z4DrR5LR" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 991801F000FF; Wed, 23 Sep 2026 14:35:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1790174133; bh=Igi6jLzz+WTjeAD13l8VzcB+kb+JwmpH3vK8hKZKmCs=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=z4DrR5LRM8EShyhq2cOMAjKlWpdFMzoc+SAiCACjVeL5MSLt/B6zxKf+5tF3z/jGw 1DFWNaXgcVEtV8ySTiw8XxcepL2VSD9WjvizuTeU+EUBTELUJrAN1tcY3qifyl4a0P 4tXMq2phu0wCLn2eqS3eVxK56HJ1F6DDycDiftJw= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Mobin Aydinfar , ChenXiaoSong , Namjae Jeon Subject: [PATCH 7.2 438/438] ksmbd: fix partial normalized name responses Date: Wed, 23 Sep 2026 16:07:39 +0200 Message-ID: <20260923140656.297950123@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260923140644.756254324@linuxfoundation.org> References: <20260923140644.756254324@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 7.2-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 @@ -6531,6 +6531,9 @@ 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 @@ -197,6 +197,7 @@ 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