| From | Luis Henriques <> | Subject | [PATCH 3.11 084/182] audit: convert PPIDs to the inital PID namespace. | Date | Thu, 24 Apr 2014 09:50:09 +0100 |
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3.11.10.9 -stable review patch. If anyone has any objections, please let me know.
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From: Richard Guy Briggs <rgb@redhat.com>
commit c92cdeb45eea38515e82187f48c2e4f435fb4e25 upstream.
sys_getppid() returns the parent pid of the current process in its own pid namespace. Since audit filters are based in the init pid namespace, a process could avoid a filter or trigger an unintended one by being in an alternate pid namespace or log meaningless information.
Switch to task_ppid_nr() for PPIDs to anchor all audit filters in the init_pid_ns.
(informed by ebiederman's 6c621b7e) Cc: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: Richard Guy Briggs <rgb@redhat.com> [ luis: backported to 3.11: adjusted context ] Signed-off-by: Luis Henriques <luis.henriques@canonical.com> --- kernel/audit.c | 4 ++-- kernel/auditsc.c | 2 +- 2 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/kernel/audit.c b/kernel/audit.c index 6def25f..aea9a19 100644 --- a/kernel/audit.c +++ b/kernel/audit.c @@ -1613,10 +1613,10 @@ void audit_log_task_info(struct audit_buffer *ab, struct task_struct *tsk) spin_unlock_irq(&tsk->sighand->siglock); audit_log_format(ab, - " ppid=%ld pid=%d auid=%u uid=%u gid=%u" + " ppid=%d pid=%d auid=%u uid=%u gid=%u" " euid=%u suid=%u fsuid=%u" " egid=%u sgid=%u fsgid=%u ses=%u tty=%s", - sys_getppid(), + task_ppid_nr(tsk), tsk->pid, from_kuid(&init_user_ns, audit_get_loginuid(tsk)), from_kuid(&init_user_ns, cred->uid), diff --git a/kernel/auditsc.c b/kernel/auditsc.c index 9845cb3..3b79a47 100644 --- a/kernel/auditsc.c +++ b/kernel/auditsc.c @@ -472,7 +472,7 @@ static int audit_filter_rules(struct task_struct *tsk, case AUDIT_PPID: if (ctx) { if (!ctx->ppid) - ctx->ppid = sys_getppid(); + ctx->ppid = task_ppid_nr(tsk); result = audit_comparator(ctx->ppid, f->op, f->val); } break; -- 1.9.1
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