From: Gaosheng Cui <cuigaosheng1@xxxxxxxxxx> commit 6e3ee990c90494561921c756481d0e2125d8b895 upstream. Fix possible null-pointer dereference in audit_filter_rules. audit_filter_rules() error: we previously assumed 'ctx' could be null Cc: stable@xxxxxxxxxxxxxxx Fixes: bf361231c295 ("audit: add saddr_fam filter field") Reported-by: kernel test robot <lkp@xxxxxxxxx> Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx> Signed-off-by: Gaosheng Cui <cuigaosheng1@xxxxxxxxxx> Signed-off-by: Paul Moore <paul@xxxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- kernel/auditsc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/kernel/auditsc.c +++ b/kernel/auditsc.c @@ -657,7 +657,7 @@ static int audit_filter_rules(struct tas 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;