FAILED: patch "[PATCH] ksmbd: fix partial normalized name responses" failed to apply to 6.1-stable tree

The patch below does not apply to the 6.1-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.1.y
git checkout FETCH_HEAD
git cherry-pick -x f4fafaf02174c32bce2f9bb4196fadf13f1fd96e
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<[email protected]>' --in-reply-to '2026092351-theft-cheek-5069@gregkh' --subject-prefix 'PATCH 6.1.y' 'HEAD^..'

Possible dependencies:

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From f4fafaf02174c32bce2f9bb4196fadf13f1fd96e Mon Sep 17 00:00:00 2001
From: Namjae Jeon <[email protected]>
Date: Wed, 9 Sep 2026 09:58:22 +0900
Subject: [PATCH] ksmbd: fix partial normalized name responses

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.

index 8acc5174530b..0436b7c898b1 100644
@@ -7312,6 +7312,9 @@ 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_NORMALIZED_NAME_INFORMATION_SIZE;
+			break;
 		case FILE_STREAM_INFORMATION:
 			fixed_len = FILE_STREAM_INFORMATION_SIZE;
 			break;

index a6200d8630e2..ca8e27f7b712 100644
@@ -212,6 +212,7 @@ 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