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3 Commits

Author SHA1 Message Date
Anatolii Shumak
0710dd0882 smb: compress: reject Pattern_V1 when not negotiated 
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: a08de24c2b ("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>
 2026-08-03 11:21:22 -05:00
Namjae Jeon
6234f50105 smb: add common SMB2 compression transform helpers 
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>
 2026-06-16 18:57:21 -05:00
Namjae Jeon
0121b15414 smb: move LZ77 compression into common code 
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>
 2026-06-16 18:57:21 -05:00