ksmbd: destroy expired sessions

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[ Upstream commit ea174a9189 ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Namjae Jeon 2023-05-03 08:42:21 +09:00 • committed by Greg Kroah-Hartman

parent f623f627ad

commit 1fc8a2b14e

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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