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Thread-Index: AQHT5K62NvsEKeSdZUOXJy6ivfNYYw== Date: Sat, 5 May 2018 20:21:55 +0000 Message-ID: Accept-Language: de-DE, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: AM5PR0701CA0064.eurprd07.prod.outlook.com (2603:10a6:203:2::26) To VI1PR0801MB1790.eurprd08.prod.outlook.com (2603:10a6:800:5b::15) x-incomingtopheadermarker: OriginalChecksum:F8FF27A89207430583C011B5F141CD34DEF2CEAC307C6FBB97AB8B2EC6F0925D; UpperCasedChecksum:6938409988CF2AD92584C4DA2BEB03FCDA7C3056C2C52625279B4D9CFAAF84C1; SizeAsReceived:7490; Count:48 x-ms-exchange-messagesentrepresentingtype: 1 x-tmn: [amQzpn1rqFE7OQOBwWzDib/SKFQTTJ2L] x-ms-publictraffictype: Email x-microsoft-exchange-diagnostics: 1; DB5EUR01HT066; 7:Qu7chksVbiZLKExnhhn8d7mXB01ta0QSWj8loygbeHRTV9z6HhkvU9INtauBB7quHaqz8gyOEdfe9FHffxwmQYH03CsU6ADPWXkrwMnL7yU01+SvYnRBRL1h/qS8u2xM4gkXNyaiJ9JpcttTJrkWAgfXoyPpCILkWoOmpaUE7g1ljy0u8pYW5b8cjTL4EPeufoUHPAwoDkZlxWpHv0NACxusYJpk9i5nXCenL3qQNsbKu04zTbPcQOZ7zEudy2+D x-incomingheadercount: 48 x-eopattributedmessage: 0 x-microsoft-antispam: UriScan:; BCL:0; PCL:0; RULEID:(7020095)(201702061078)(5061506573)(5061507331)(1603103135)(2017031320274)(2017031324274)(2017031323274)(2017031322404)(1603101448)(1601125374)(1701031045); SRVR:DB5EUR01HT066; x-ms-traffictypediagnostic: DB5EUR01HT066: x-exchange-antispam-report-cfa-test: BCL:0; PCL:0; RULEID:(444000031); SRVR:DB5EUR01HT066; BCL:0; PCL:0; RULEID:; SRVR:DB5EUR01HT066; x-forefront-prvs: 0663390E1B x-forefront-antispam-report: SFV:NSPM; SFS:(7070007)(98901004); DIR:OUT; SFP:1901; SCL:1; SRVR:DB5EUR01HT066; H:VI1PR0801MB1790.eurprd08.prod.outlook.com; FPR:; SPF:None; LANG:; x-microsoft-antispam-message-info: d/c0Xm5P21sQ/xwuLngDS79M+cdnwAwXajMYliPTywSJIdLgnc59Vdgp24qiG7wTtpJO4rVfiabipcKDyVqVfnbPwncpSIYH8ygShtlsfON3juXdvmj/sa8+ec/X/dCI34IKGYcWMpkfY5Lq3CAikSIlDaGOtAF+guM4DLYY6R7Wwrz5mnv7XZWybns4f0Za MIME-Version: 1.0 X-MS-Office365-Filtering-Correlation-Id: 61c77192-3239-457c-1cd0-08d5b2c5d855 X-OriginatorOrg: outlook.com X-MS-Exchange-CrossTenant-RMS-PersistedConsumerOrg: 7181d4b0-87d6-4f4e-ba33-0d3746212cec X-MS-Exchange-CrossTenant-Network-Message-Id: 61c77192-3239-457c-1cd0-08d5b2c5d855 X-MS-Exchange-CrossTenant-rms-persistedconsumerorg: 7181d4b0-87d6-4f4e-ba33-0d3746212cec X-MS-Exchange-CrossTenant-originalarrivaltime: 05 May 2018 20:21:55.7113 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Internet X-MS-Exchange-CrossTenant-id: 84df9e7f-e9f6-40af-b435-aaaaaaaaaaaa X-MS-Exchange-Transport-CrossTenantHeadersStamped: DB5EUR01HT066 Subject: [edk2] [PATCH] MdePkg/UefiFileHandleLib: Fix potential NULL dereference. X-BeenThere: edk2-devel@lists.01.org X-Mailman-Version: 2.1.26 Precedence: list List-Id: EDK II Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "michael.d.kinney@intel.com" , "liming.gao@intel.com" Content-Transfer-Encoding: quoted-printable Errors-To: edk2-devel-bounces@lists.01.org Sender: "edk2-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZohoMail: RDKM_2 RSF_4 Z_629925259 SPT_0 Content-Type: text/plain; charset="utf-8" Move the NULL-check in FileHandleGetInfo() to directly after the allocation to prevent potential NULL dereferences. Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Marvin Haeuser Reviewed-by: Ruiyu Ni --- MdePkg/Library/UefiFileHandleLib/UefiFileHandleLib.c | 30 +++++++++++-----= ---- 1 file changed, 16 insertions(+), 14 deletions(-) diff --git a/MdePkg/Library/UefiFileHandleLib/UefiFileHandleLib.c b/MdePkg/= Library/UefiFileHandleLib/UefiFileHandleLib.c index 57aad77bc135..bcf3a328b82d 100644 --- a/MdePkg/Library/UefiFileHandleLib/UefiFileHandleLib.c +++ b/MdePkg/Library/UefiFileHandleLib/UefiFileHandleLib.c @@ -1,7 +1,7 @@ /** @file Provides interface to EFI_FILE_HANDLE functionality. =20 - Copyright (c) 2006 - 2017, Intel Corporation. All rights reserved.
+ Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.
This program and the accompanying materials are licensed and made available under the terms and conditions of the BS= D License which accompanies this distribution. The full text of the license may b= e found at @@ -74,19 +74,21 @@ FileHandleGetInfo ( // error is expected. getting size to allocate // FileInfo =3D AllocateZeroPool(FileInfoSize); - // - // now get the information - // - Status =3D FileHandle->GetInfo(FileHandle, - &gEfiFileInfoGuid, - &FileInfoSize, - FileInfo); - // - // if we got an error free the memory and return NULL - // - if (EFI_ERROR(Status) && (FileInfo !=3D NULL)) { - FreePool(FileInfo); - FileInfo =3D NULL; + if (FileInfo !=3D NULL) { + // + // now get the information + // + Status =3D FileHandle->GetInfo(FileHandle, + &gEfiFileInfoGuid, + &FileInfoSize, + FileInfo); + // + // if we got an error free the memory and return NULL + // + if (EFI_ERROR(Status)) { + FreePool(FileInfo); + FileInfo =3D NULL; + } } } return (FileInfo); --=20 2.17.0.windows.1 _______________________________________________ edk2-devel mailing list edk2-devel@lists.01.org https://lists.01.org/mailman/listinfo/edk2-devel