freebsd-src/contrib/capsicum-test/capsicum-linux.h
Enji Cooper 8ac5aef8f3 Integrate capsicum-test into the FreeBSD test suite
This change takes capsicum-test from upstream and applies some local changes to make the
tests work on FreeBSD when executed via Kyua.

The local modifications are as follows:
1. Make `OpenatTest.WithFlag` pass with the new dot-dot lookup behavior in FreeBSD 12.x+.
2. capsicum-test references a set of helper binaries: `mini-me`, `mini-me.noexec`, and
   `mini-me.setuid`, as part of the execve/fexecve tests, via execve, fexecve, and open.
   It achieves this upstream by assuming `mini-me*` is in the current directory, however,
   in order for Kyua to execute `capsicum-test`, it needs to provide a full path to
   `mini-me*`. In order to achieve this, I made `capsicum-test` cache the executable's
   path from argv[0] in main(..) and use the cached value to compute the path to
   `mini-me*` as part of the execve/fexecve testcases.
3. The capsicum-test test suite assumes that it's always being run on CAPABILITIES enabled
   kernels. However, there's a chance that the test will be run on a host without a
   CAPABILITIES enabled kernel, so we must check for the support before running the tests.
   The way to achieve this is to add the relevant `feature_present("security_capabilities")`
   check to SetupEnvironment::SetUp() and skip the tests when the support is not available.
   While here, add a check for `kern.trap_enotcap` being enabled. As noted by markj@ in
   https://github.com/google/capsicum-test/issues/23, this sysctl being enabled can trigger
   non-deterministic failures. Therefore, the tests should be skipped if this sysctl is
   enabled.

All local changes have been submitted to the capsicum-test project
(https://github.com/google/capsicum-test) and are in various stages of review.
Please see the following pull requests for more details:
1. https://github.com/google/capsicum-test/pull/35
2. https://github.com/google/capsicum-test/pull/41
3. https://github.com/google/capsicum-test/pull/42

Reviewed by:	asomers
Discussed with:	emaste, markj
Approved by:	emaste (mentor)
MFC after:	2 months
Differential Revision: https://reviews.freebsd.org/D19758
2019-04-01 21:24:50 +00:00

41 lines
1.2 KiB
C

#ifndef __CAPSICUM_LINUX_H__
#define __CAPSICUM_LINUX_H__
#ifdef __linux__
/************************************************************
* Linux Capsicum Functionality.
************************************************************/
#include <errno.h>
#include <sys/procdesc.h>
#include <sys/capsicum.h>
#define HAVE_CAP_RIGHTS_LIMIT
#define HAVE_CAP_RIGHTS_GET
#define HAVE_CAP_FCNTLS_LIMIT
#define HAVE_CAP_IOCTLS_LIMIT
#define HAVE_PROC_FDINFO
#define HAVE_PDWAIT4
#define CAP_FROM_ACCEPT
// TODO(drysdale): uncomment if/when Linux propagates rights on sctp_peeloff.
// Linux does not generate a capability from sctp_peeloff(cap_fd,...).
// #define CAP_FROM_PEELOFF
// TODO(drysdale): uncomment if/when Linux allows intermediate .. path segments
// for openat()-like operations.
// #define HAVE_OPENAT_INTERMEDIATE_DOTDOT
// Failure to open file due to path traversal generates EPERM
#ifdef ENOTBENEATH
#define E_NO_TRAVERSE_CAPABILITY ENOTBENEATH
#define E_NO_TRAVERSE_O_BENEATH ENOTBENEATH
#else
#define E_NO_TRAVERSE_CAPABILITY EPERM
#define E_NO_TRAVERSE_O_BENEATH EPERM
#endif
// Too many links
#define E_TOO_MANY_LINKS ELOOP
#endif /* __linux__ */
#endif /*__CAPSICUM_LINUX_H__*/