[PATCH -next, v2 1/2] audit: fix possible null-pointer dereference in audit_filter_rules

Fix this possible null-pointer dereference in audit_filter_rules. If ctx is null, a null-pointer dereference will occur: case AUDIT_SADDR_FAM: if (ctx->sockaddr) ... break; audit_filter_rules() error: we previously assumed 'ctx' could be null Reported-by: kernel test robot <lkp(a)intel.com&gt; Reported-by: Dan Carpenter <dan.carpenter(a)oracle.com&gt; Signed-off-by: Gaosheng Cui <cuigaosheng1(a)huawei.com&gt; --- kernel/auditsc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/auditsc.c b/kernel/auditsc.c index 4ba3b8573ff4..42d4a4320526 100644 --- a/kernel/auditsc.c +++ b/kernel/auditsc.c @@ -647,7 +647,7 @@ static int audit_filter_rules(struct task_struct *tsk, result = audit_comparator(audit_loginuid_set(tsk), f->op, f->val); break; case AUDIT_SADDR_FAM: - if (ctx->sockaddr) + if (ctx && ctx->sockaddr) result = audit_comparator(ctx->sockaddr->ss_family, f->op, f->val); break; -- 2.30.0