Micah Morton aeca4e2ca6
LSM: add SafeSetID module that gates setid calls ...
SafeSetID gates the setid family of syscalls to restrict UID/GID
transitions from a given UID/GID to only those approved by a
system-wide whitelist. These restrictions also prohibit the given
UIDs/GIDs from obtaining auxiliary privileges associated with
CAP_SET{U/G}ID, such as allowing a user to set up user namespace UID
mappings. For now, only gating the set*uid family of syscalls is
supported, with support for set*gid coming in a future patch set.
Signed-off-by: Micah Morton <mortonm@chromium.org >
Acked-by: Kees Cook <keescook@chromium.org >
Signed-off-by: James Morris <james.morris@microsoft.com >
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aeca4e2ca6
