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Kernel commit ed5d44d42c95 ("selinux: Implement userns_create hook")
seems to just introduce a new functionality, but given that SELinux
implements a form of mandatory access control, introducing the new
permission breaks any application (shipping with SELinux policies)
that needs to create user namespaces, such as passt and pasta for
sandboxing purposes.
Add the new 'allow' rules. They appear to be backward compatible,
kernel-wise, and the policy now requires the new 'user_namespace'
class to build, but that's something distributions already ship.
Reported-by: Richard W.M. Jones <rjones@redhat.com>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Reviewed-by: Richard W.M. Jones <rjones@redhat.com>
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In practical terms, passt doesn't benefit from the additional
protection offered by the AGPL over the GPL, because it's not
suitable to be executed over a computer network.
Further, restricting the distribution under the version 3 of the GPL
wouldn't provide any practical advantage either, as long as the passt
codebase is concerned, and might cause unnecessary compatibility
dilemmas.
Change licensing terms to the GNU General Public License Version 2,
or any later version, with written permission from all current and
past contributors, namely: myself, David Gibson, Laine Stump, Andrea
Bolognani, Paul Holzinger, Richard W.M. Jones, Chris Kuhn, Florian
Weimer, Giuseppe Scrivano, Stefan Hajnoczi, and Vasiliy Ulyanov.
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
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Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
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Laine reports that with a simple:
<portForward proto='tcp'>
<range start='2022' to='22'/>
</portForward>
in libvirt's domain XML, passt won't start as it fails to bind
arbitrary ports. That was actually the intention behind passt_port_t:
the user or system administrator should have explicitly configured
allowed ports on a given machine. But it's probably not realistic, so
just allow any port to be bound and forwarded.
Also fix up some missing operations on sockets.
Reported-by: Laine Stump <laine@redhat.com>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Tested-by: Laine Stump <laine@redhat.com>
Reviewed-by: Laine Stump <laine@redhat.com>
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Otherwise, it's unusable as stand-alone tool, or in foreground mode,
and it's also impossible to get output from --help or --version,
because for SELinux it's just a daemon.
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Tested-by: Laine Stump <laine@redhat.com>
Reviewed-by: Laine Stump <laine@redhat.com>
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Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Tested-by: Laine Stump <laine@redhat.com>
Reviewed-by: Laine Stump <laine@redhat.com>
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Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
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Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
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This is needed by the new functions in isolate.c, add the
corresponding rule.
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
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Instead of restricting PID files to /var/run/passt.pid, which is a
single file and unlikely to be used, use the user_tmp_t type which
should cover any reasonable need.
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
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Services running passt will commonly need to transition to its
domain, terminate it, connect and write to its socket.
The init_daemon_domain() macro now defines the default transition to
the passt_t domain, using the passt_exec_t type.
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
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These should cover any reasonably common use case in distributions.
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
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