Setting audit_failure to AUDIT_FAIL_PANIC may
cause system panic.
We should disallow uninit user namesapce to change it.
Signed-off-by: Gao feng <gaofeng@xxxxxxxxxxxxxx>
---
kernel/audit.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/kernel/audit.c b/kernel/audit.c
index 8a3ea47..18cf5ce 100644
--- a/kernel/audit.c
+++ b/kernel/audit.c
@@ -345,6 +345,9 @@ static int audit_set_failure(int state, kuid_t loginuid, u32 sessionid, u32 sid)
&& state != AUDIT_FAIL_PANIC)
return -EINVAL;
+ if (current_user_ns() != &init_user_ns)
+ return -EPERM;
+
return audit_do_config_change("audit_failure", &audit_failure, state,
loginuid, sessionid, sid);
}
--
1.8.1.4
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