ksmbd: destroy expired sessions

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client can indefinitely send smb2 session setup requests with
the SessionId set to 0, thus indefinitely spawning new sessions,
and causing indefinite memory usage. This patch limit to the number
of sessions using expired timeout and session state.

Cc: stable@vger.kernel.org
Reported-by: zdi-disclosures@trendmicro.com # ZDI-CAN-20478
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>

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Namjae Jeon 2023-05-03 08:42:21 +09:00 • committed by Steve French

parent f5c779b7dd

commit ea174a9189

4 changed files with 41 additions and 31 deletions

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68

fs/ksmbd/mgmt/user_session.c

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1

fs/ksmbd/mgmt/user_session.h

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1

fs/ksmbd/smb2pdu.c

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2

fs/ksmbd/smb2pdu.h

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