From nobody Fri Dec 19 07:49:07 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1A5D6C19F29 for ; Mon, 1 Aug 2022 12:05:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233353AbiHAMFI (ORCPT ); Mon, 1 Aug 2022 08:05:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43066 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233336AbiHAME0 (ORCPT ); Mon, 1 Aug 2022 08:04:26 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0655B57273; Mon, 1 Aug 2022 04:54:26 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 40839B81163; Mon, 1 Aug 2022 11:54:25 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id A1F60C433C1; Mon, 1 Aug 2022 11:54:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1659354864; bh=kdVP2qKbvN4yMUOSpwx8raN54nwWbc4Q2QdJKyqjSgY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=J2Grp/VLrbgeiJ9i73E0u7sUBuRpnr7yOdB1PBtZwIqxjGNlWhZGvMbKFY8IEjykH RnDB1sCO+Coc1c20CVcrR9Xu4ENi8ViC5Tquulf4YqiutcHqSfnQ6g20ncgvChwpG1 d0rWHzBOS+8BM+FQJRxuoRb2ndD2OwDmqvxEFTFg= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Miaohe Lin , Muchun Song , Anshuman Khandual , Baolin Wang , Mike Kravetz , Andrew Morton Subject: [PATCH 5.15 07/69] hugetlb: fix memoryleak in hugetlb_mcopy_atomic_pte Date: Mon, 1 Aug 2022 13:46:31 +0200 Message-Id: <20220801114134.777267366@linuxfoundation.org> X-Mailer: git-send-email 2.37.1 In-Reply-To: <20220801114134.468284027@linuxfoundation.org> References: <20220801114134.468284027@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Miaohe Lin commit da9a298f5fad0dc615079a340da42928bc5b138e upstream. When alloc_huge_page fails, *pagep is set to NULL without put_page first. So the hugepage indicated by *pagep is leaked. Link: https://lkml.kernel.org/r/20220709092629.54291-1-linmiaohe@huawei.com Fixes: 8cc5fcbb5be8 ("mm, hugetlb: fix racy resv_huge_pages underflow on UF= FDIO_COPY") Signed-off-by: Miaohe Lin Acked-by: Muchun Song Reviewed-by: Anshuman Khandual Reviewed-by: Baolin Wang Reviewed-by: Mike Kravetz Cc: Signed-off-by: Andrew Morton Signed-off-by: Greg Kroah-Hartman --- mm/hugetlb.c | 1 + 1 file changed, 1 insertion(+) --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -5314,6 +5314,7 @@ int hugetlb_mcopy_atomic_pte(struct mm_s =20 page =3D alloc_huge_page(dst_vma, dst_addr, 0); if (IS_ERR(page)) { + put_page(*pagep); ret =3D -ENOMEM; *pagep =3D NULL; goto out;