ksmbd: reject delete-on-close for read-only files

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DELETE_ON_CLOSE is currently accepted for files carrying the read-only
DOS attribute. The server consequently creates or opens the file and
marks it for deletion instead of returning STATUS_CANNOT_DELETE.

Reject creation of a new read-only file with DELETE_ON_CLOSE. For an
existing file, load the stored DOS attributes before accepting the
create option. Also reject FileDispositionInformation when the opened
file has the read-only attribute.

Preserve the explicit STATUS_CANNOT_DELETE value while unwinding the
CREATE request.

This fixes smb2.delete-on-close-perms.READONLY.

Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>

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This commit is contained in:

Namjae Jeon 2026-07-05 15:43:29 +09:00

parent 5d47ebb279

commit 497dbc5999

1 changed files with 32 additions and 3 deletions

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fs/smb/server/smb2pdu.c

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