From c92cdeb45eea38515e82187f48c2e4f435fb4e25 Mon Sep 17 00:00:00 2001 From: Richard Guy Briggs Date: Tue, 10 Dec 2013 22:10:41 -0500 Subject: audit: convert PPIDs to the inital PID namespace. 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: stable@vger.kernel.org Cc: Eric W. Biederman Signed-off-by: Richard Guy Briggs --- kernel/auditsc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'kernel/auditsc.c') diff --git a/kernel/auditsc.c b/kernel/auditsc.c index 57bf178ca7d5..a6cf7ab56e61 100644 --- a/kernel/auditsc.c +++ b/kernel/auditsc.c @@ -465,7 +465,7 @@ 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; -- cgit v1.2.3-55-g7522