In order to make it easier for users to build with SELinux, have a
single option in 'Global build settings' to enable all necessary
kernel features, userland packages and build-system hooks.
Also add better descriptions and help messages while at it.
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
The LSM (Linux security mechanism) list is the successor of the now
legacy *major LSM*. Instead of defining a single security mechanism the
LSM symbol is a comma separated list of mechanisms to load.
Until recently OpenWrt would only support DAC (Unix discretionary access
controls) which don't require an additional entry in the LSM list. With
the newly introduced SELinux support the LSM needs to be extended else
only a manual modified Kernel cmdline (`security=selinux`) would
activate SELinux.
As the default OpenWrt Kernel config sets DAC as default security
mechanism, SELinux is stripped from the LSM list, even if
`KERNEL_DEFAULT_SECURITY_SELINUX` is activated. To allow SELinux without
a modified cmdline this commit sets a specific LSM list if
`KERNEL_SECURITY_SELINUX` is enabled.
The upstream Kconfig adds even more mechanisms
(smack,selinux,tomoyo,apparmor), but until they're ported to OpenWrt,
these can be ignored.
To compile SELinux Kernel support but disable it from loading, the
already present options `KERNEL_SECURITY_SELINUX_DISABLE` or
`KERNEL_SECURITY_SELINUX_BOOTPARAM` (with custom cmdline `selinux=0`)
can be used. Further it's possible to edit `/etc/selinux/config`.
Signed-off-by: Paul Spooren <mail@aparcar.org>
This adds a number of options to config/Config-kernel.in so that
packages related to SELinux support can enable the appropriate Linux
kernel support.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
[rebase; add ext4, F2FS, UBIFS, and JFFS2 support; add commit message]
Signed-off-by: W. Michael Petullo <mike@flyn.org>
This allows the build process to prepare a squashfs filesystem for use
with SELinux.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
[rebase, add commit message]
Signed-off-by: W. Michael Petullo <mike@flyn.org>
The symbol KERNEL_CGROUP_HUGETLB is always used whenever KERNEL_CGROUPS is enabled.
The absence of this notation will cause the user to be asked to enter this parameter the first time it is compiled.
Signed-off-by: Yuan Tao <ty@wevs.org>
Remapping the local build path in debug information makes debugging
using ./scripts/remote-gdb harder, because files no longer refer to the full
path on the build host.
For local builds, debug information does not need to be reproducible,
since it will be stripped out of packages anyway.
For buildbot builds, it makes sense to keep debug information reproducible,
since the full path is not needed (nor desired) anywhere.
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Enabling KERNEL_TRANSPARENT_HUGEPAGE exposes 2 missing symbols:
* CONFIG_READ_ONLY_THP_FOR_FS
* TRANSPARENT_HUGEPAGE_ALWAYS
* TRANSPARENT_HUGEPAGE_MADVISE
The first one was added in 5.4, and is marked experimental there so just
disable it in the generic config.
For the latter two, we should not force the user to use either of them,
so add them as build-configurable kernel options.
Fixes: d1a8217d87 ("kernel: clean-up build-configurable kernel config symbols")
Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>
It was removed from target defaults though it didn't exist in the
build-systems kernel configuration options. Add it there.
Fixes: d1a8217d87 ("kernel: clean-up build-configurable kernel config symbols")
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Don't explicitely disable options in target/linux/generic/config-* if
they are already controlled in config/Config-kernel.in.
Add a bunch of new symbols and prepare defaults for using only unified
hierarchy (ie. cgroup2). Update symbol dependencies while at it
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Currently the user space stack cookies work well also when the kernel
stack cookies are not activated. This is handled completely in user
space and does not need kernel support.
This dependency was probably needed some years ago when the libc did not
support stack cookies.
Reviewed-by: Ian Cooper <iancooper@hotmail.com>
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Removes the standalone implementation of stack smashing protection
in gcc's libssp in favour of the native implementation available
in glibc and uclibc. Musl libc already uses its native ssp, so this
patch does not affect musl-based toolchains.
Stack smashing protection configuration options are now uniform
across all supported libc variants.
This also makes kernel-level stack smashing protection available
for x86_64 and i386 builds using non-musl libc.
Signed-off-by: Ian Cooper <iancooper@hotmail.com>
