Public bug reported:
SRU Justification: This bug can cause confined process to oops at
address 0.
As reported by Tetsuo Handa on kernel-team mailing list:
In aa_may_change_ptraced_domain, if (!tracer) cred == NULL, and
put_cred(cred) will oops. This will only happen on exec if the task
is marked as LSM_UNSAFE_PTRACE | LSM_UNSAFE_PTRACE_CAP, so should
only happen to ptraced tasks that are confined.
Fix this by returning directly from aa_may_change_ptrace_domain if
there is now tracer.
** Affects: linux (Ubuntu)
Importance: Undecided
Assignee: John Johansen (jjohansen)
Status: In Progress
** Changed in: linux (Ubuntu)
Assignee: (unassigned) => John Johansen (jjohansen)
** Changed in: linux (Ubuntu)
Status: New => In Progress
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AppArmor oops in aa_may_change_ptraced_domain
https://bugs.launchpad.net/bugs/480112
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