ksmbd: recognize replayed SMB2 lock sequences

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A server returns success without processing a lock request when a valid
LockSequenceArray entry contains the same sequence number. The current
verifier only invalidates mismatched entries, so matching requests are
submitted to the VFS again and recorded as duplicate locks.

Make the verifier report matching sequences and skip lock processing for
those replays. Also correct the field comment to describe the sequence
and index bit layout used by the implementation and the protocol. Use
the capabilities advertised by the server when deciding whether lock
sequence verification applies to a multichannel connection.

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

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This commit is contained in:

Namjae Jeon 2026-07-29 21:24:54 +09:00

parent 54d90311f9

commit 5ce5227cd6

2 changed files with 25 additions and 13 deletions

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4

fs/smb/common/smb2pdu.h

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34

fs/smb/server/smb2pdu.c

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