ksmbd: handle encrypted compressed requests

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SMB3 permits a message to be compressed before it is encrypted. After
decrypting such a request, ksmbd must trim the AEAD tag using
OriginalMessageSize, decompress the nested compression transform, and
validate the resulting SMB2 PDU.

Share the decompression helper between the connection receive path and
the post-decryption work path so unencrypted and encrypted compressed
requests follow the same validation.

Fixes: a08de24c2b ("ksmbd: negotiate and decode SMB2 compression")
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>

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This commit is contained in:

Namjae Jeon 2026-08-16 15:33:04 +09:00

parent d8fc4fc7e5

commit 6639b6928b

4 changed files with 97 additions and 24 deletions

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76

fs/smb/server/compress.c

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1

fs/smb/server/compress.h

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22

fs/smb/server/server.c

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22

fs/smb/server/smb2pdu.c

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