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590 lines
27 KiB
Plaintext
590 lines
27 KiB
Plaintext
# Author: Jamie Strandboge <jamie@canonical.com>
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#include <tunables/global>
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/usr/lib/snapd/snap-confine (attach_disconnected) {
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# Include any additional files that snapd chose to generate.
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# - for $HOME on NFS
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# - for $HOME on encrypted media
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#
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# Those are discussed on https://forum.snapcraft.io/t/snapd-vs-upstream-kernel-vs-apparmor
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# and https://forum.snapcraft.io/t/snaps-and-nfs-home/
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#include "/var/lib/snapd/apparmor/snap-confine"
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# We run privileged, so be fanatical about what we include and don't use
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# any abstractions
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/etc/ld.so.cache r,
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/etc/ld.so.preload r,
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/{,usr/}lib{,32,64,x32}/{,@{multiarch}/{,atomics/}}ld-*.so mrix,
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# libc, you are funny
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/{,usr/}lib{,32,64,x32}/{,@{multiarch}/{,atomics/}}libc{,-[0-9]*}.so* mr,
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/{,usr/}lib{,32,64,x32}/{,@{multiarch}/{,atomics/}}libpthread{,-[0-9]*}.so* mr,
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/{,usr/}lib{,32,64,x32}/{,@{multiarch}/}libreadline{,-[0-9]*}.so* mr,
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/{,usr/}lib{,32,64,x32}/{,@{multiarch}/{,atomics/}}librt{,-[0-9]*}.so* mr,
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/{,usr/}lib{,32,64,x32}/{,@{multiarch}/}libgcc_s.so* mr,
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/{,usr/}lib{,32,64,x32}/{,@{multiarch}/}libncursesw{,-[0-9]*}.so* mr,
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/{,usr/}lib{,32,64,x32}/{,@{multiarch}/{,atomics/}}libresolv{,-[0-9]*}.so* mr,
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/{,usr/}lib{,32,64,x32}/{,@{multiarch}/}libselinux.so* mr,
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/{,usr/}lib{,32,64,x32}/{,@{multiarch}/}libpcre{,2}{,-[0-9]*}.so* mr,
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/{,usr/}lib{,32,64,x32}/{,@{multiarch}/}libmount.so* mr,
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/{,usr/}lib{,32,64,x32}/{,@{multiarch}/}libblkid.so* mr,
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/{,usr/}lib{,32,64,x32}/{,@{multiarch}/}libuuid.so* mr,
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# normal libs in order
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/{,usr/}lib{,32,64,x32}/{,@{multiarch}/}libapparmor.so* mr,
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/{,usr/}lib{,32,64,x32}/{,@{multiarch}/}libcgmanager.so* mr,
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/{,usr/}lib{,32,64,x32}/{,@{multiarch}/{,atomics/}}libdl{,-[0-9]*}.so* mr,
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/{,usr/}lib{,32,64,x32}/{,@{multiarch}/}libnih.so* mr,
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/{,usr/}lib{,32,64,x32}/{,@{multiarch}/}libnih-dbus.so* mr,
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/{,usr/}lib{,32,64,x32}/{,@{multiarch}/}libdbus-1.so* mr,
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/{,usr/}lib{,32,64,x32}/{,@{multiarch}/}libudev.so* mr,
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/{,usr/}lib{,32,64,x32}/{,@{multiarch}/}libseccomp.so* mr,
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/{,usr/}lib{,32,64,x32}/{,@{multiarch}/}libcap.so* mr,
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/usr/lib/snapd/snap-confine mr,
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# This rule is needed when executing from a "base: core" devmode snap on
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# UC18 and newer where the /usr/lib/snapd/snap-confine inside the
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# "base: core" mount namespace always comes from the snapd snap, and thus
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# we will execute snap-confine via this path, and thus need to be able to
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# read this path when executing. It's also necessary on classic where both
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# the snapd and the core snap are installed at the same time.
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# TODO: remove this rule when we stop supporting executing other snaps from
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# inside devmode snaps, ideally even in the short term we would only include
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# this rule on core only, and specifically uc18 and newer where we need it
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#@VERBATIM_LIBEXECDIR_SNAP_CONFINE@ mr,
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/dev/null rw,
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/dev/full rw,
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/dev/zero rw,
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/dev/random r,
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/dev/urandom r,
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/dev/pts/[0-9]* rw,
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/dev/tty rw,
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# cgroup: devices
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capability sys_admin,
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capability dac_read_search,
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capability dac_override,
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/sys/fs/cgroup/ r,
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/sys/fs/cgroup/devices/ r,
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/sys/fs/cgroup/devices/snap.*/ rw,
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/sys/fs/cgroup/devices/snap.*/cgroup.procs w,
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/sys/fs/cgroup/devices/snap.*/devices.{allow,deny} w,
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# cgroup: freezer
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# Allow creating per-snap cgroup freezers and adding snap command (task)
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# invocations to the freezer. This allows for reliably enumerating all
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# running processes for the snap. In addition, allow enumerating processes
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# in the cgroup to determine if it is occupied.
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/sys/fs/cgroup/freezer/ r,
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/sys/fs/cgroup/freezer/snap.*/ w,
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/sys/fs/cgroup/freezer/snap.*/cgroup.procs rw,
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# querying udev
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/etc/udev/udev.conf r,
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/sys/**/uevent r,
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/run/udev/** rw,
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/{,usr/}bin/tr ixr,
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/usr/lib/locale/** r,
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/usr/lib/@{multiarch}/gconv/gconv-modules r,
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/usr/lib/@{multiarch}/gconv/gconv-modules.cache r,
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# priv dropping
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capability setuid,
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capability setgid,
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# changing profile
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@{PROC}/[0-9]*/attr/{,apparmor/}exec w,
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# Reading current profile
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@{PROC}/[0-9]*/attr/{,apparmor/}current r,
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# Reading available filesystems
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@{PROC}/filesystems r,
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# To find where apparmor is mounted
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@{PROC}/[0-9]*/mounts r,
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# To find if apparmor is enabled
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/sys/module/apparmor/parameters/enabled r,
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# Don't allow changing profile to unconfined or profiles that start with
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# '/'. Use 'unsafe' to support snap-exec on armhf and its reliance on
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# the environment for determining the capabilities of the architecture.
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# 'unsafe' is ok here because the kernel will have already cleared the
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# environment as part of launching snap-confine with CAP_SYS_ADMIN. This
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# does leave directories as configured by ld.so.preload as well as
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# LD_PRELOAD to be set to a library which is in a directory configured by
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# ld.so.conf, but access to those locations is mediated by this profile
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# (which requires rules for specific locations).
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change_profile unsafe /** -> [^u/]**,
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change_profile unsafe /** -> u[^n]**,
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change_profile unsafe /** -> un[^c]**,
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change_profile unsafe /** -> unc[^o]**,
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change_profile unsafe /** -> unco[^n]**,
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change_profile unsafe /** -> uncon[^f]**,
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change_profile unsafe /** -> unconf[^i]**,
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change_profile unsafe /** -> unconfi[^n]**,
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change_profile unsafe /** -> unconfin[^e]**,
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change_profile unsafe /** -> unconfine[^d]**,
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change_profile unsafe /** -> unconfined?**,
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# allow changing to a few not caught above
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change_profile unsafe /** -> {u,un,unc,unco,uncon,unconf,unconfi,unconfin,unconfine},
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# LP: #1446794 - when this bug is fixed, change the above to:
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# deny change_profile unsafe /** -> {unconfined,/**},
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# change_profile unsafe /** -> **,
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# reading seccomp filters
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/{tmp/snap.rootfs_*/,}var/lib/snapd/seccomp/bpf/*.bin r,
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# LP: #1668659 and parallel instaces of classic snaps
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mount options=(rw rbind) /snap/ -> /snap/,
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mount options=(rw rshared) -> /snap/,
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mount options=(rw rbind) /var/lib/snapd/snap/ -> /var/lib/snapd/snap/,
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mount options=(rw rshared) -> /var/lib/snapd/snap/,
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# boostrapping the mount namespace
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mount options=(rw rshared) -> /,
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mount options=(rw bind) /tmp/snap.rootfs_*/ -> /tmp/snap.rootfs_*/,
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mount options=(rw unbindable) -> /tmp/snap.rootfs_*/,
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# the next line is for classic system
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mount options=(rw rbind) /snap/*/*/ -> /tmp/snap.rootfs_*/,
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# the next line is for core system
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mount options=(rw rbind) / -> /tmp/snap.rootfs_*/,
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# all of the constructed rootfs is a rslave
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mount options=(rw rslave) -> /tmp/snap.rootfs_*/,
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# bidirectional mounts (for both classic and core)
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# NOTE: this doesn't capture the MERGED_USR configuration option so that
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# when a distro with merged /usr and / that uses apparmor shows up it
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# should be handled here.
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/{,run/}media/ w,
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mount options=(rw rbind) /{,run/}media/ -> /tmp/snap.rootfs_*/{,run/}media/,
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/run/netns/ w,
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mount options=(rw rbind) /run/netns/ -> /tmp/snap.rootfs_*/run/netns/,
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# unidirectional mounts (only for classic system)
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mount options=(rw rbind) /dev/ -> /tmp/snap.rootfs_*/dev/,
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mount options=(rw rslave) -> /tmp/snap.rootfs_*/dev/,
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mount options=(rw rbind) /etc/ -> /tmp/snap.rootfs_*/etc/,
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mount options=(rw rslave) -> /tmp/snap.rootfs_*/etc/,
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mount options=(rw rbind) /home/ -> /tmp/snap.rootfs_*/home/,
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mount options=(rw rslave) -> /tmp/snap.rootfs_*/home/,
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mount options=(rw rbind) /root/ -> /tmp/snap.rootfs_*/root/,
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mount options=(rw rslave) -> /tmp/snap.rootfs_*/root/,
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mount options=(rw rbind) /proc/ -> /tmp/snap.rootfs_*/proc/,
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mount options=(rw rslave) -> /tmp/snap.rootfs_*/proc/,
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mount options=(rw rbind) /sys/ -> /tmp/snap.rootfs_*/sys/,
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mount options=(rw rslave) -> /tmp/snap.rootfs_*/sys/,
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mount options=(rw rbind) /tmp/ -> /tmp/snap.rootfs_*/tmp/,
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mount options=(rw rslave) -> /tmp/snap.rootfs_*/tmp/,
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mount options=(rw rbind) /var/lib/dhcp/ -> /tmp/snap.rootfs_*/var/lib/dhcp/,
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mount options=(rw rslave) -> /tmp/snap.rootfs_*/var/lib/dhcp/,
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mount options=(rw rbind) /var/lib/snapd/ -> /tmp/snap.rootfs_*/var/lib/snapd/,
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mount options=(rw rslave) -> /tmp/snap.rootfs_*/var/lib/snapd/,
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mount options=(rw rbind) /var/snap/ -> /tmp/snap.rootfs_*/var/snap/,
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mount options=(rw rslave) -> /tmp/snap.rootfs_*/var/snap/,
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mount options=(rw rbind) /var/tmp/ -> /tmp/snap.rootfs_*/var/tmp/,
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mount options=(rw rslave) -> /tmp/snap.rootfs_*/var/tmp/,
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mount options=(rw rbind) /run/ -> /tmp/snap.rootfs_*/run/,
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mount options=(rw rslave) -> /tmp/snap.rootfs_*/run/,
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mount options=(rw rbind) /var/lib/extrausers/ -> /tmp/snap.rootfs_*/var/lib/extrausers/,
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mount options=(rw rslave) -> /tmp/snap.rootfs_*/var/lib/extrausers/,
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mount options=(rw rbind) {,/usr}/lib{,32,64,x32}/modules/ -> /tmp/snap.rootfs_*{,/usr}/lib/modules/,
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mount options=(rw rslave) -> /tmp/snap.rootfs_*{,/usr}/lib/modules/,
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mount options=(rw rbind) {,/usr}/lib{,32,64,x32}/firmware/ -> /tmp/snap.rootfs_*{,/usr}/lib/firmware/,
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mount options=(rw rslave) -> /tmp/snap.rootfs_*{,/usr}/lib/firmware/,
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mount options=(rw rbind) /var/log/ -> /tmp/snap.rootfs_*/var/log/,
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mount options=(rw rslave) -> /tmp/snap.rootfs_*/var/log/,
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mount options=(rw rbind) /usr/src/ -> /tmp/snap.rootfs_*/usr/src/,
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mount options=(rw rslave) -> /tmp/snap.rootfs_*/usr/src/,
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mount options=(rw rbind) /mnt/ -> /tmp/snap.rootfs_*/mnt/,
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mount options=(rw rslave) -> /tmp/snap.rootfs_*/mnt/,
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# allow making host snap-exec available inside base snaps
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mount options=(rw bind) /usr/lib/snapd/ -> /tmp/snap.rootfs_*/usr/lib/snapd/,
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mount options=(rw slave) -> /tmp/snap.rootfs_*/usr/lib/snapd/,
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# allow making re-execed host snap-exec available inside base snaps
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mount options=(ro bind) /snap/core/*/usr/lib/snapd/ -> /tmp/snap.rootfs_*/usr/lib/snapd/,
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# allow making snapd snap tools available inside base snaps
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mount options=(ro bind) /snap/snapd/*/usr/lib/snapd/ -> /tmp/snap.rootfs_*/usr/lib/snapd/,
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mount options=(rw bind) /usr/bin/snapctl -> /tmp/snap.rootfs_*/usr/bin/snapctl,
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mount options=(rw slave) -> /tmp/snap.rootfs_*/usr/bin/snapctl,
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# /etc/alternatives (classic and normal mode)
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mount options=(rw bind) /snap/*/*/etc/alternatives/ -> /tmp/snap.rootfs_*/etc/alternatives/,
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mount options=(rw bind) /snap/*/*/etc/ssl/ -> /tmp/snap.rootfs_*/etc/ssl/,
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mount options=(rw bind) /snap/*/*/etc/nsswitch.conf -> /tmp/snap.rootfs_*/etc/nsswitch.conf,
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mount options=(rw bind) /snap/*/*/etc/apparmor/ -> /tmp/snap.rootfs_*/etc/apparmor/,
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mount options=(rw bind) /snap/*/*/etc/apparmor.d/ -> /tmp/snap.rootfs_*/etc/apparmor.d/,
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# /etc/alternatives (core/legacy mode)
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mount options=(rw bind) /etc/alternatives/ -> /tmp/snap.rootfs_*/etc/alternatives/,
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# making all those directories slave shared.
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mount options=(rw slave) -> /tmp/snap.rootfs_*/etc/alternatives/,
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mount options=(rw slave) -> /tmp/snap.rootfs_*/etc/ssl/,
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mount options=(rw slave) -> /tmp/snap.rootfs_*/etc/nsswitch.conf,
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mount options=(rw slave) -> /tmp/snap.rootfs_*/etc/apparmor/,
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mount options=(rw slave) -> /tmp/snap.rootfs_*/etc/apparmor.d/,
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# the /snap directory
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mount options=(rw rbind) /snap/ -> /tmp/snap.rootfs_*/snap/,
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mount options=(rw rslave) -> /tmp/snap.rootfs_*/snap/,
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# pivot_root preparation and execution
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mount options=(rw bind) /tmp/snap.rootfs_*/var/lib/snapd/hostfs/ -> /tmp/snap.rootfs_*/var/lib/snapd/hostfs/,
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mount options=(rw private) -> /tmp/snap.rootfs_*/var/lib/snapd/hostfs/,
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# pivot_root mediation in AppArmor is not complete. See LP: #1791711.
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# However, we can mediate the new_root and put_old to be what we expect,
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# and then deny directory creation within old_root to prevent trivial
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# pivoting into a whitelisted path.
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pivot_root oldroot=/tmp/snap.rootfs_*/var/lib/snapd/hostfs/ /tmp/snap.rootfs_*/,
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# Explicitly deny creating the old_root directory in case it is
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# inadvertently added somewhere else. While this doesn't resolve
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# LP: #1791711, it provides some hardening.
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audit deny /tmp/snap.rootfs_*/{var/,var/lib/,var/lib/snapd/,var/lib/snapd/hostfs/} w,
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# cleanup
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umount /var/lib/snapd/hostfs/tmp/snap.rootfs_*/,
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umount /var/lib/snapd/hostfs/sys/,
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umount /var/lib/snapd/hostfs/dev/,
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umount /var/lib/snapd/hostfs/proc/,
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mount options=(rw rslave) -> /var/lib/snapd/hostfs/,
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# Hide /writable from view of snaps.
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mount options=(rprivate) -> /{,var/lib/snapd/hostfs/}writable/,
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umount /{,var/lib/snapd/hostfs/}writable/,
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# set up user mount namespace
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mount options=(rslave) -> /,
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# set up mount namespace for parallel instances of classic snaps
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mount options=(rw rbind) /snap/{,*/} -> /snap/{,*/},
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mount options=(rslave) -> /snap/,
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mount options=(rslave) -> /var/snap/,
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mount options=(rw rbind) /var/snap/{,*/} -> /var/snap/{,*/},
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mount options=(rw rshared) -> /var/snap/,
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# Allow reading the os-release file (possibly a symlink to /usr/lib).
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/{etc/,usr/lib/}os-release r,
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# Allow creating /var/lib/snapd/hostfs, if missing
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/var/lib/snapd/hostfs/ rw,
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# set up snap-specific private /tmp dir
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capability chown,
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/tmp/ rw,
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/tmp/snap.*/ rw,
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/tmp/snap.*/tmp/ rw,
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mount options=(rw private) -> /tmp/,
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mount options=(rw bind) /tmp/snap.*/tmp/ -> /tmp/,
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mount fstype=devpts options=(rw) devpts -> /dev/pts/,
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mount options=(rw bind) /dev/pts/ptmx -> /dev/ptmx, # for bind mounting
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mount options=(rw bind) /dev/pts/ptmx -> /dev/pts/ptmx, # for bind mounting under LXD
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# Workaround for LP: #1584456 on older kernels that mistakenly think
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# /dev/pts/ptmx needs a trailing '/'
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mount options=(rw bind) /dev/pts/ptmx/ -> /dev/ptmx/,
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mount options=(rw bind) /dev/pts/ptmx/ -> /dev/pts/ptmx/,
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# for running snaps on classic
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/snap/ r,
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/snap/** r,
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/snap/ r,
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/snap/** r,
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# NOTE: at this stage the /snap directory is stable as we have called
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# pivot_root already.
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# nvidia handling, glob needs /usr/** and the launcher must be
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# able to bind mount the nvidia dir
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/sys/module/nvidia/version r,
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/sys/**/drivers/nvidia{,_*}/* r,
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/sys/**/nvidia*/uevent r,
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/sys/module/nvidia{,_*}/* r,
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/dev/nvidia[0-9]* r,
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/dev/nvidiactl r,
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/dev/nvidia-uvm r,
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/usr/** r,
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mount options=(rw bind) /usr/lib{,32}/nvidia-*/ -> /{tmp/snap.rootfs_*/,}var/lib/snapd/lib/gl{,32}/,
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mount options=(rw bind) /usr/lib{,32}/nvidia-*/ -> /{tmp/snap.rootfs_*/,}var/lib/snapd/lib/gl{,32}/,
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/tmp/snap.rootfs_*/var/lib/snapd/lib/gl{,32}/{,*} w,
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mount fstype=tmpfs options=(rw nodev noexec) none -> /tmp/snap.rootfs_*/var/lib/snapd/lib/gl{,32}/,
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mount options=(remount ro bind) -> /tmp/snap.rootfs_*/var/lib/snapd/lib/gl{,32}/,
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# Vulkan support
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/tmp/snap.rootfs_*/var/lib/snapd/lib/vulkan/{,*} w,
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mount fstype=tmpfs options=(rw nodev noexec) none -> /tmp/snap.rootfs_*/var/lib/snapd/lib/vulkan/,
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mount options=(remount ro bind) -> /tmp/snap.rootfs_*/var/lib/snapd/lib/vulkan/,
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# GLVND EGL vendor
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/tmp/snap.rootfs_*/var/lib/snapd/lib/glvnd/{,*} w,
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mount fstype=tmpfs options=(rw nodev noexec) none -> /tmp/snap.rootfs_*/var/lib/snapd/lib/glvnd/,
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mount options=(remount ro bind) -> /tmp/snap.rootfs_*/var/lib/snapd/lib/glvnd/,
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# create gl dirs as needed
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/tmp/snap.rootfs_*/ r,
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/tmp/snap.rootfs_*/var/ r,
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/tmp/snap.rootfs_*/var/lib/ r,
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/tmp/snap.rootfs_*/var/lib/snapd/ r,
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/tmp/snap.rootfs_*/var/lib/snapd/lib/ r,
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/tmp/snap.rootfs_*/var/lib/snapd/lib/gl{,32}/ r,
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/tmp/snap.rootfs_*/var/lib/snapd/lib/gl{,32}/** rw,
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/tmp/snap.rootfs_*/var/lib/snapd/lib/vulkan/ r,
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/tmp/snap.rootfs_*/var/lib/snapd/lib/vulkan/** rw,
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/tmp/snap.rootfs_*/var/lib/snapd/lib/glvnd/ r,
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/tmp/snap.rootfs_*/var/lib/snapd/lib/glvnd/** rw,
|
|
|
|
# for chroot on steroids, we use pivot_root as a better chroot that makes
|
|
# apparmor rules behave the same on classic and outside of classic.
|
|
|
|
# for creating the user data directories: ~/snap, ~/snap/<name> and
|
|
# ~/snap/<name>/<version>
|
|
/ r,
|
|
@{HOMEDIRS}/ r,
|
|
# These should both have 'owner' match but due to LP: #1466234, we can't
|
|
# yet
|
|
@{HOME}/ r,
|
|
@{HOME}/snap/{,*/,*/*/} rw,
|
|
|
|
# Special case for *classic* snaps that are used by users with existing dirs
|
|
# in /var/lib/. Like jenkins, postgresql, mysql, puppet, ...
|
|
# (see https://forum.snapcraft.io/t/9717)
|
|
# TODO: this can be removed once we support home-dirs outside of /home
|
|
# better
|
|
/var/ r,
|
|
/var/lib/ r,
|
|
# These should both have 'owner' match but due to LP: #1466234, we can't
|
|
# yet
|
|
/var/lib/*/ r,
|
|
/var/lib/*/snap/{,*/,*/*/} rw,
|
|
|
|
# for creating the user shared memory directories
|
|
/{dev,run}/{,shm/} r,
|
|
# This should both have 'owner' match but due to LP: #1466234, we can't yet
|
|
/{dev,run}/shm/{,*/,*/*/} rw,
|
|
|
|
# for creating the user XDG_RUNTIME_DIR: /run/user, /run/user/UID and
|
|
# /run/user/UID/<name>
|
|
/run/user/{,[0-9]*/,[0-9]*/*/} rw,
|
|
|
|
# Workaround https://launchpad.net/bugs/359338 until upstream handles
|
|
# stacked filesystems generally.
|
|
# encrypted ~/.Private and old-style encrypted $HOME
|
|
@{HOME}/.Private/ r,
|
|
@{HOME}/.Private/** mrwlk,
|
|
# new-style encrypted $HOME
|
|
@{HOMEDIRS}/.ecryptfs/*/.Private/ r,
|
|
@{HOMEDIRS}/.ecryptfs/*/.Private/** mrwlk,
|
|
|
|
# Allow snap-confine to move to the void, creating it if necessary.
|
|
/var/lib/snapd/void/ rw,
|
|
|
|
# Allow snap-confine to read snap contexts
|
|
/var/lib/snapd/context/snap.* r,
|
|
|
|
# Allow snap-confine to unmount stale mount namespaces.
|
|
umount /run/snapd/ns/*.mnt,
|
|
/run/snapd/ns/snap.*.fstab w,
|
|
# Allow snap-confine to read and write mount namespace information files.
|
|
/run/snapd/ns/snap.*.info rw,
|
|
# Required to correctly unmount bound mount namespace.
|
|
# See LP: #1735459 for details.
|
|
umount /,
|
|
|
|
# support for locking
|
|
/run/snapd/lock/ rw,
|
|
/run/snapd/lock/*.lock rwk,
|
|
|
|
# support for the mount namespace sharing
|
|
capability sys_ptrace,
|
|
# allow snap-confine to read /proc/1/ns/mnt
|
|
ptrace read peer=unconfined,
|
|
# https://forum.snapcraft.io/t/custom-kernel-error-on-readlinkat-in-mount-namespace/6097/21
|
|
ptrace trace peer=unconfined,
|
|
|
|
mount options=(rw rbind) /run/snapd/ns/ -> /run/snapd/ns/,
|
|
mount options=(private) -> /run/snapd/ns/,
|
|
/ rw,
|
|
/run/ rw,
|
|
/run/snapd/ rw,
|
|
/run/snapd/ns/ rw,
|
|
/run/snapd/ns/*.lock rwk,
|
|
/run/snapd/ns/*.mnt rw,
|
|
ptrace (read, readby, tracedby) peer=/usr/lib/snapd/snap-confine//mount-namespace-capture-helper,
|
|
@{PROC}/*/mountinfo r,
|
|
capability sys_chroot,
|
|
capability sys_admin,
|
|
signal (send, receive) set=(abrt) peer=/usr/lib/snapd/snap-confine,
|
|
signal (send) set=(int) peer=/usr/lib/snapd/snap-confine//mount-namespace-capture-helper,
|
|
signal (send, receive) set=(int, alrm, exists) peer=/usr/lib/snapd/snap-confine,
|
|
signal (receive) set=(exists) peer=/usr/lib/snapd/snap-confine//mount-namespace-capture-helper,
|
|
|
|
# workaround for linux 4.13/upstream, see
|
|
# https://forum.snapcraft.io/t/snapd-2-27-6-2-in-debian-sid-blocked-on-apparmor-in-kernel-4-13-0-1/2813/3
|
|
ptrace (trace, tracedby) peer=/usr/lib/snapd/snap-confine,
|
|
|
|
# Allow reading snap cookies.
|
|
/var/lib/snapd/cookie/snap.* r,
|
|
|
|
# For aa_change_hat() to go into ^mount-namespace-capture-helper
|
|
@{PROC}/[0-9]*/attr/{,apparmor/}current w,
|
|
|
|
# As a special exception allow snap-confine to write to anything in /var/lib.
|
|
# This code should be changed to allow delegation so that snap-confine can
|
|
# inherit any file descriptor and pass it to the invoked application but
|
|
# this is not possible in apparmor yet.
|
|
# See https://bugs.launchpad.net/snapd/+bug/1815869
|
|
/var/lib/** rw,
|
|
|
|
^mount-namespace-capture-helper (attach_disconnected) {
|
|
# We run privileged, so be fanatical about what we include and don't use
|
|
# any abstractions
|
|
/etc/ld.so.cache r,
|
|
/{,usr/}lib{,32,64,x32}/{,@{multiarch}/{,atomics/}}ld-*.so mrix,
|
|
# libc, you are funny
|
|
/{,usr/}lib{,32,64,x32}/{,@{multiarch}/{,atomics/}}libc{,-[0-9]*}.so* mr,
|
|
/{,usr/}lib{,32,64,x32}/{,@{multiarch}/{,atomics/}}libpthread{,-[0-9]*}.so* mr,
|
|
/{,usr/}lib{,32,64,x32}/{,@{multiarch}/}libreadline{,-[0-9]*}.so* mr,
|
|
/{,usr/}lib{,32,64,x32}/{,@{multiarch}/{,atomics/}}librt{,-[0-9]*}.so* mr,
|
|
/{,usr/}lib{,32,64,x32}/{,@{multiarch}/}libgcc_s.so* mr,
|
|
/{,usr/}lib{,32,64,x32}/{,@{multiarch}/}libncursesw{,-[0-9]*}.so* mr,
|
|
/{,usr/}lib{,32,64,x32}/{,@{multiarch}/{,atomics/}}libresolv{,-[0-9]*}.so* mr,
|
|
/{,usr/}lib{,32,64,x32}/{,@{multiarch}/}libselinux.so* mr,
|
|
/{,usr/}lib{,32,64,x32}/{,@{multiarch}/}libpcre.so* mr,
|
|
/{,usr/}lib{,32,64,x32}/{,@{multiarch}/}libmount.so* mr,
|
|
/{,usr/}lib{,32,64,x32}/{,@{multiarch}/}libblkid.so* mr,
|
|
/{,usr/}lib{,32,64,x32}/{,@{multiarch}/}libuuid.so* mr,
|
|
# normal libs in order
|
|
/{,usr/}lib{,32,64,x32}/{,@{multiarch}/}libapparmor.so* mr,
|
|
/{,usr/}lib{,32,64,x32}/{,@{multiarch}/}libcgmanager.so* mr,
|
|
/{,usr/}lib{,32,64,x32}/{,@{multiarch}/{,atomics/}}libdl{,-[0-9]*}.so* mr,
|
|
/{,usr/}lib{,32,64,x32}/{,@{multiarch}/}libnih.so* mr,
|
|
/{,usr/}lib{,32,64,x32}/{,@{multiarch}/}libnih-dbus.so* mr,
|
|
/{,usr/}lib{,32,64,x32}/{,@{multiarch}/}libdbus-1.so* mr,
|
|
/{,usr/}lib{,32,64,x32}/{,@{multiarch}/}libudev.so* mr,
|
|
/{,usr/}lib{,32,64,x32}/{,@{multiarch}/}libseccomp.so* mr,
|
|
/{,usr/}lib{,32,64,x32}/{,@{multiarch}/}libcap.so* mr,
|
|
|
|
/usr/lib/snapd/snap-confine mr,
|
|
|
|
/dev/null rw,
|
|
/dev/full rw,
|
|
/dev/zero rw,
|
|
/dev/random r,
|
|
/dev/urandom r,
|
|
|
|
capability sys_ptrace,
|
|
capability sys_admin,
|
|
# This allows us to read and bind mount the namespace file
|
|
/ r,
|
|
@{PROC}/ r,
|
|
@{PROC}/*/ r,
|
|
@{PROC}/*/ns/ r,
|
|
@{PROC}/*/ns/mnt r,
|
|
/run/ r,
|
|
/run/snapd/ r,
|
|
/run/snapd/ns/ r,
|
|
/run/snapd/ns/*.mnt rw,
|
|
# NOTE: the source name is / even though we map /proc/123/ns/mnt
|
|
mount options=(rw bind) / -> /run/snapd/ns/*.mnt,
|
|
# This is the SIGALRM that we send and receive if a timeout expires
|
|
signal (send, receive) set=(alrm) peer=/usr/lib/snapd/snap-confine//mount-namespace-capture-helper,
|
|
# Those two rules are exactly the same but we don't know if the parent process is still alive
|
|
# and hence has the appropriate label or is already dead and hence has no label.
|
|
signal (send) set=(exists) peer=/usr/lib/snapd/snap-confine,
|
|
signal (send) set=(exists) peer=unconfined,
|
|
# This is so that we can abort
|
|
signal (send, receive) set=(abrt) peer=/usr/lib/snapd/snap-confine//mount-namespace-capture-helper,
|
|
# This is the signal we get if snap-confine dies (we subscribe to it with prctl)
|
|
signal (receive) set=(int) peer=/usr/lib/snapd/snap-confine,
|
|
# This allows snap-confine to be killed from the outside.
|
|
signal (receive) peer=unconfined,
|
|
# This allows snap-confine to wait for us
|
|
ptrace (read, trace, tracedby) peer=/usr/lib/snapd/snap-confine,
|
|
}
|
|
|
|
# Allow snap-confine to be killed
|
|
signal (receive) peer=unconfined,
|
|
|
|
# Allow switching to snap-update-ns with a per-snap profile.
|
|
change_profile -> snap-update-ns.*,
|
|
|
|
# Allow executing snap-update-ns when...
|
|
|
|
# ...snap-confine is, conceptually, re-executing and uses snap-update-ns
|
|
# from the distribution package. This is also the location used when using
|
|
# the core/base snap on all-snap systems. The variants here represent
|
|
# various locations of libexecdir across distributions.
|
|
/usr/lib{,exec,64}/snapd/snap-update-ns r,
|
|
|
|
# ...snap-confine is not, conceptually, re-executing and uses
|
|
# snap-update-ns from the distribution package but we are already inside
|
|
# the constructed mount namespace so we must traverse "hostfs". The
|
|
# variants here represent various locations of libexecdir across
|
|
# distributions.
|
|
/var/lib/snapd/hostfs/usr/lib{,exec,64}/snapd/snap-update-ns r,
|
|
|
|
# ..snap-confine is, conceptually, re-executing and uses snap-update-ns
|
|
# from the core or snapd snaps. Note that the location of the actual snap
|
|
# varies from distribution to distribution. The variants here represent
|
|
# different locations of snap mount directory across distributions.
|
|
/{,var/lib/snapd/}snap/{core,snapd}/*/usr/lib/snapd/snap-update-ns r,
|
|
|
|
# ...snap-confine is, conceptually, re-executing and uses snap-update-ns
|
|
# from the core snap or snapd snap, but we are already inside the
|
|
# constructed mount namespace. Here the apparmor kernel module
|
|
# re-constructs the path to snap-update-ns using the "hostfs" mount entry
|
|
# rather than the more "natural" /snap mount entry but we have no control
|
|
# over that. This is reported as (LP: #1716339). The variants here
|
|
# represent different locations of snap mount directory across
|
|
# distributions.
|
|
/var/lib/snapd/hostfs/{,var/lib/snapd/}snap/{core,snapd}/*/usr/lib/snapd/snap-update-ns r,
|
|
|
|
# Allow executing snap-discard-ns, just like the set for snap-update-ns
|
|
# above but with the key difference that snap-discard-ns does not
|
|
# have a dedicated profile so we need to inherit snap-confine's profile.
|
|
|
|
/usr/lib{,exec,64}/snapd/snap-discard-ns rix,
|
|
/var/lib/snapd/hostfs/usr/lib{,exec,64}/snapd/snap-discard-ns rix,
|
|
/{,var/lib/snapd/}snap/{core,snapd}/*/usr/lib/snapd/snap-discard-ns rix,
|
|
/var/lib/snapd/hostfs/{,var/lib/snapd/}snap/{core,snapd}/*/usr/lib/snapd/snap-discard-ns rix,
|
|
|
|
# Allow mounting /var/lib/jenkins from the host into the snap.
|
|
mount options=(rw rbind) /var/lib/jenkins/ -> /tmp/snap.rootfs_*/var/lib/jenkins/,
|
|
mount options=(rw rslave) -> /tmp/snap.rootfs_*/var/lib/jenkins/,
|
|
|
|
# Suppress noisy file_inherit denials (LP: #1850552) until LP: #1849753 is
|
|
# fixed.
|
|
deny /dev/shm/.org.chromium.Chromium.* rw,
|
|
|
|
# While snap-confine itself doesn't require unix rules and therefore all
|
|
# unix rules are implicitly denied, adding an explicit deny for unix to
|
|
# silence noisy denials breaks nested lxd. Until the cause is determined,
|
|
# do not use an explicit deny for unix. (LP: #1855355)
|
|
#deny unix,
|
|
|
|
# Explicitly deny these accesses which show up on Arch to silence the
|
|
# denials for this unneeded access.
|
|
deny /{,usr/}lib{,32,64,x32}/{,@{multiarch}/}libnss_files-[0-9]*.so* mr,
|
|
deny /{,usr/}lib{,32,64,x32}/{,@{multiarch}/}libnss_mymachines.[0-9]*.so* mr,
|
|
deny /{,usr/}lib{,32,64,x32}/{,@{multiarch}/}libnss_systemd.[0-9]*.so* mr,
|
|
deny /etc/nsswitch.conf r,
|
|
deny /etc/passwd r,
|
|
}
|