Public bug reported:
[Impact]
We maintain custom LSM stacking and AppArmor SAUCE patches in our kernel
to provide additional features that are not available in the upstream
AppArmor.
We have experienced occasional bugs in the lunar kernel (specifically
with the environ.sh test) that can lead to system crashes / failures
(such as potential NULL pointer dereference).
[Test case]
Run AppArmor autopkgtest / qa-regression-testing.
[Fix]
Apply the following additional fixes provided by AppArmor upstream
maintainer:
UBUNTU: SAUCE: apparmor: fix policy_compat perms remap for file dfa
UBUNTU: SAUCE: apparmor: fix profile verification and enable it
UBUNTU: SAUCE: apparmor: fix: add missing failure check in
compute_xmatch_perms
UBUNTU: SAUCE: apparmor: fix: kzalloc perms tables for shared dfas
[Regression potential]
Additional fixes are touching only AppArmor specific code, so we may
experience regressions (bugs / behavior change) only in apparmor by
applying them.
** Affects: linux (Ubuntu)
Importance: Medium
Status: Triaged
** Affects: linux (Ubuntu Lunar)
Importance: Medium
Status: Triaged
** Also affects: linux (Ubuntu Lunar)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/2017903
Title:
LSM stacking and AppArmor for 6.2: additional fixes
Status in linux package in Ubuntu:
Triaged
Status in linux source package in Lunar:
Triaged
Bug description:
[Impact]
We maintain custom LSM stacking and AppArmor SAUCE patches in our
kernel to provide additional features that are not available in the
upstream AppArmor.
We have experienced occasional bugs in the lunar kernel (specifically
with the environ.sh test) that can lead to system crashes / failures
(such as potential NULL pointer dereference).
[Test case]
Run AppArmor autopkgtest / qa-regression-testing.
[Fix]
Apply the following additional fixes provided by AppArmor upstream
maintainer:
UBUNTU: SAUCE: apparmor: fix policy_compat perms remap for file dfa
UBUNTU: SAUCE: apparmor: fix profile verification and enable it
UBUNTU: SAUCE: apparmor: fix: add missing failure check in
compute_xmatch_perms
UBUNTU: SAUCE: apparmor: fix: kzalloc perms tables for shared dfas
[Regression potential]
Additional fixes are touching only AppArmor specific code, so we may
experience regressions (bugs / behavior change) only in apparmor by
applying them.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2017903/+subscriptions
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