From: Richard Guy Briggs <[email protected]> 3.12-stable review patch. If anyone has any objections, please let me know.
=============== 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 <[email protected]> Signed-off-by: Richard Guy Briggs <[email protected]> Signed-off-by: Jiri Slaby <[email protected]> --- 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 74ced93e5703..50512d11a445 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 tty=%s ses=%u", - 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 9845cb32b60a..3b79a47ddb13 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; -- 1.9.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
