ksmbd: fix use-after-free in ksmbd_sessions_deregister()

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commit 15a9605f8d upstream.

In multichannel mode, UAF issue can occur in session_deregister
when the second channel sets up a session through the connection of
the first channel. session that is freed through the global session
table can be accessed again through ->sessions of connection.

Cc: stable@vger.kernel.org
Reported-by: Norbert Szetei <norbert@doyensec.com>
Tested-by: Norbert Szetei <norbert@doyensec.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Namjae Jeon 2025-03-22 09:20:19 +09:00 • committed by Greg Kroah-Hartman

parent 800c482c9e

commit ca042cc0e4

1 changed files with 3 additions and 0 deletions

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fs/smb/server/mgmt/user_session.c

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