Messages in this thread | | | From | Namjae Jeon <> | Date | Thu, 29 Sep 2022 21:38:10 +0900 | Subject | Re: [PATCH v1] ksmbd: Fix user namespace mapping |
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2022-09-29 19:04 GMT+09:00, Mickaël Salaün <mic@digikod.net>: > A kernel daemon should not rely on the current thread, which is unknown > and might be malicious. Before this security fix, > ksmbd_override_fsids() didn't correctly override FS UID/GID which means > that arbitrary user space threads could trick the kernel to impersonate > arbitrary users or groups for file system access checks, leading to > file system access bypass. > > This was found while investigating truncate support for Landlock: > https://lore.kernel.org/r/CAKYAXd8fpMJ7guizOjHgxEyyjoUwPsx3jLOPZP=wPYcbhkVXqA@mail.gmail.com > > Fixes: e2f34481b24d ("cifsd: add server-side procedures for SMB3") > Cc: Hyunchul Lee <hyc.lee@gmail.com> > Cc: Namjae Jeon <linkinjeon@kernel.org> > Cc: Steve French <smfrench@gmail.com> > Cc: stable@vger.kernel.org > Signed-off-by: Mickaël Salaün <mic@digikod.net> > Link: https://lore.kernel.org/r/20220929100447.108468-1-mic@digikod.net Acked-by: Namjae Jeon <linkinjeon@kernel.org>
Thanks!
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