ksmbd: reject empty-attribute synchronize-only create

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smb2.create.gentest checks each desired access bit independently and
expects an open that requests only SYNCHRONIZE with CreateDisposition
OPEN_IF and FileAttributes 0 to fail with STATUS_ACCESS_DENIED.

Rejecting all SYNCHRONIZE-only opens is too broad: SYNCHRONIZE does not
imply read, write, or delete data access, and
smb2.sharemode.sharemode-access expects a SYNCHRONIZE-only open to succeed
when it does not conflict with the existing share mode.

Limit the rejection to the gentest create shape: SYNCHRONIZE-only access,
OPEN_IF disposition, and no file attributes. Other synchronize-only opens
are handled by the normal permission and share-mode checks.

Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>

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Namjae Jeon 2026-06-21 19:44:40 +09:00 • committed by Steve French

parent 19043971c9

commit 4687da7b28

1 changed files with 7 additions and 0 deletions

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fs/smb/server/smb2pdu.c

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