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Pattern_V1 is an optional chained payload type selected during SMB 3.1.1
compression negotiate. conn->compress_pattern was only consulted when
building responses, so a peer that negotiated LZ77 with chained support
could still submit Pattern payloads on the receive path.
Pass allow_pattern through smb_compression_decompress() and reject
SMB3_COMPRESS_PATTERN in the chained decoder when it is false.
Link: https://github.com/namjaejeon/ksmbd/issues/529
Fixes: a08de24c2b85 ("ksmbd: negotiate and decode SMB2 compression")
Signed-off-by: Anatolii Shumak <anatoliy.shumak@gmail.com>
Reviewed-by: ChenXiaoSong <chenxiaosong@kylinos.cn>
Acked-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
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Implement common validation, compression and decompression for SMB2
compression transforms.
Support unchained LZ77 and chained NONE, LZ77 and Pattern_V1 payloads.
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
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Move the LZ77 codec in cifs.ko to smb/common/ so both the SMB
client and ksmbd can use it.
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
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