[pve-devel] [PATCH lxc 2/2] apparmor: add rule for allowing remount of boot_id

[Thomas Lamprecht]

On 22.07.20 13:05, Stoiko Ivanov wrote:
> commit 863845075d3f77d27c91bd9f47d2f8ddc4867bd5 in upstream only partially
> fixes the apparmor deny for mounting boot_id (used for example for identifying
> different boots with `journalctl`) inside the container.
> 
> Tested by editing the profile and replacing it disregarding the cache:
> `apparmor_parser -W -T -r /etc/apparmor.d/usr.bin.lxc-start`
> 

was this proposed to upstream as pull request? Did not found it on the
LXC GitHub page.

> Signed-off-by: Stoiko Ivanov <s.ivanov at proxmox.com>
> ---
>  ...apparmor-Allow-ro-remount-of-boot_id.patch | 26 +++++++++++++++++++
>  debian/patches/series                         |  1 +
>  2 files changed, 27 insertions(+)
>  create mode 100644 debian/patches/pve/0004-apparmor-Allow-ro-remount-of-boot_id.patch
> 
> diff --git a/debian/patches/pve/0004-apparmor-Allow-ro-remount-of-boot_id.patch b/debian/patches/pve/0004-apparmor-Allow-ro-remount-of-boot_id.patch
> new file mode 100644
> index 0000000..fefc586
> --- /dev/null
> +++ b/debian/patches/pve/0004-apparmor-Allow-ro-remount-of-boot_id.patch
> @@ -0,0 +1,26 @@
> +From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
> +From: Stoiko Ivanov <s.ivanov at proxmox.com>
> +Date: Wed, 22 Jul 2020 12:17:24 +0200
> +Subject: [PATCH lxc] apparmor: Allow ro remount of boot_id
> +
> +The rule added in 863845075d3f77d27c91bd9f47d2f8ddc4867bd5 did not cover all
> +necessary mount calls for /proc/sys/kernel/random/boot_id
> +(in src/lxc/conf.c: lxc_setup_boot_id) - the ro remount is missing.
> +
> +Signed-off-by: Stoiko Ivanov <s.ivanov at proxmox.com>
> +---
> + config/apparmor/abstractions/start-container.in | 1 +
> + 1 file changed, 1 insertion(+)
> +
> +diff --git a/config/apparmor/abstractions/start-container.in b/config/apparmor/abstractions/start-container.in
> +index 9998f1121..9f64c2727 100644
> +--- a/config/apparmor/abstractions/start-container.in
> ++++ b/config/apparmor/abstractions/start-container.in
> +@@ -22,6 +22,7 @@
> +   mount -> /var/lib/lxc/{**,},
> + 
> +   mount /dev/.lxc-boot-id -> /proc/sys/kernel/random/boot_id,
> ++  mount options=(ro, nosuid, nodev, noexec, remount, bind) -> /proc/sys/kernel/random/boot_id,
> + 
> +   # required for some pre-mount hooks
> +   mount fstype=overlayfs,
> diff --git a/debian/patches/series b/debian/patches/series
> index ee20ef5..f588081 100644
> --- a/debian/patches/series
> +++ b/debian/patches/series
> @@ -1,3 +1,4 @@
>  pve/0001-PVE-Config-lxc.service-start-after-a-potential-syslo.patch
>  pve/0002-PVE-Config-deny-rw-mounting-of-sys-and-proc.patch
>  pve/0003-PVE-Config-attach-always-use-getent.patch
> +pve/0004-apparmor-Allow-ro-remount-of-boot_id.patch
>