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contact devel+owner@edk2.groups.io Reply-To: devel@edk2.groups.io,krzysztof.koch@arm.com X-Gm-Message-State: qB28iEVO8ElinAlxfH5xnJ0Ix1787277AA= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=groups.io; q=dns/txt; s=20140610; t=1579518867; bh=yNxlzkBBW7YG9UsnOtZRLW+a1qyrFxB4IMol81lKRhQ=; h=CC:Content-Type:Date:From:Reply-To:Subject:To; b=DbG1sZHG+6z+sgINld0+RM1PKsbLRw9VJMppsn3LBqraMCniZ60JJLMZBfBlvtr6OBJ 0mli8M6ul9lpYTX4wvVGbWqlJ8q9HOLkVqEpjl2emWGHKXwbJSMnaVNmv1OiicpTQXSBg Khu2PPV4PosexaWmhNALHSSrbcakVHUxGFQ= X-ZohoMail-DKIM: pass (identity @groups.io) Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Check if SlitSystemLocalityCount pointer has been successfully updated before it is used for further table parsing. Signed-off-by: Krzysztof Koch --- Notes: v3: - Rebase on latest master [Krzysztof] v1: - Test against NULL pointers [Krzysztof] ShellPkg/Library/UefiShellAcpiViewCommandLib/Parsers/Slit/SlitParser.c | 1= 6 ++++++++++++++-- 1 file changed, 14 insertions(+), 2 deletions(-) diff --git a/ShellPkg/Library/UefiShellAcpiViewCommandLib/Parsers/Slit/Slit= Parser.c b/ShellPkg/Library/UefiShellAcpiViewCommandLib/Parsers/Slit/SlitPa= rser.c index ca2808db526b1bbb79aeb21ccfc0ae6c79b2dfd8..17e2166a09d8615b714e0c51d4d= 93d293fcdf601 100644 --- a/ShellPkg/Library/UefiShellAcpiViewCommandLib/Parsers/Slit/SlitParser.c +++ b/ShellPkg/Library/UefiShellAcpiViewCommandLib/Parsers/Slit/SlitParser.c @@ -1,7 +1,7 @@ /** @file SLIT table parser =20 - Copyright (c) 2016 - 2018, ARM Limited. All rights reserved. + Copyright (c) 2016 - 2019, ARM Limited. All rights reserved. SPDX-License-Identifier: BSD-2-Clause-Patent =20 @par Reference(s): @@ -75,9 +75,21 @@ ParseAcpiSlit ( AcpiTableLength, PARSER_PARAMS (SlitParser) ); + + // Check if the values used to control the parsing logic have been + // successfully read. + if (SlitSystemLocalityCount =3D=3D NULL) { + IncrementErrorCount (); + Print ( + L"ERROR: Insufficient table length. AcpiTableLength =3D %d.\n", + AcpiTableLength + ); + return; + } + LocalityPtr =3D Ptr + Offset; - LocalityCount =3D *SlitSystemLocalityCount; + // We only print the Localities if the count is less than 16 // If the locality count is more than 16 then refer to the // raw data dump. -- 'Guid(CE165669-3EF3-493F-B85D-6190EE5B9759)' -=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D- Groups.io Links: You receive all messages sent to this group. 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