Received: by 2002:ab2:710b:0:b0:1ef:a325:1205 with SMTP id z11csp380812lql; Mon, 11 Mar 2024 05:49:51 -0700 (PDT) X-Forwarded-Encrypted: i=3; AJvYcCUsbPKArVq2ZRDEjvYjzu+5AEGKY5m23xkEzEx8Ka0azwQMnN6O7Io3dBoAbDw8RaGPrTj8Tu9qVSVSHW/JXvcGX4IxMlHLUihRHjtYUA== X-Google-Smtp-Source: AGHT+IEAwGYLEB5FIn9eN0IOAr4WL6Yi6PZmE9TEijHLyRAXNpHcxarLL8gy21qhE5bIh1kuQeMZ X-Received: by 2002:a05:620a:5e55:b0:788:32cb:929e with SMTP id ya21-20020a05620a5e5500b0078832cb929emr6686206qkn.52.1710161391477; Mon, 11 Mar 2024 05:49:51 -0700 (PDT) ARC-Seal: i=2; a=rsa-sha256; t=1710161391; cv=pass; d=google.com; s=arc-20160816; b=b1DI9UH5Lg27AKvOY8pgocxaezKriv51a+lVqYJHFfZc8YRpqg6G5ZsYWHX5NuhlkI sbjjQNLDMYSsULXtzDqK6OF+4p4RiLnchIdPHJzmTo8eZGgw3qsnsMgDWyUzN9BZiqC1 5U7DIAmhB5gSs+vMaEKdjvC5u0J9h1VodnJmyG3OkybMSdhd8Jd7CV7o7Tt54+4urptQ uj8OPuZ4TUAFSqN660axTtiBvvnO/7P2gnS9DOoa82nzRHbCDEoPsFGUSMWeLvEoOPd5 wZ2QqIxZ1dffCI1Y972Z5Z9pkIdEee5OQwnb7TZjRR8OEUzH3/3lc+UCKuCIiR7Igc8x TlzQ== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=content-transfer-encoding:mime-version:list-unsubscribe :list-subscribe:list-id:precedence:references:in-reply-to:date :subject:cc:to:from:message-id:dkim-signature; bh=tLb6KWZBoxGV0fA+3X/ShT89VgoRxqI6W6b+OTUce/M=; fh=HCgF8mioQiLC0zQUAPxHCPqLaWJV0fvFHLV61m1ma0E=; b=bqkLhqz7NId5DHGyhn77BzRJzWuE5JSlUT6FKb7+dNbVisnsjN270VpeCSxfODGtYa oS4gsnJ3tI5W3J9qt487qb+nmpu258hiazHeIMBxLuAeL9BuvwxKrrf00mAt0Udo8/Pi hqwjIHz57tydesgXErXsUhQrx97jaQo8KsR2pHNGYoQTBWU5bJyUfgQLFeJiqC56k6l0 K5N2tCNxRXL95VVd4BDCTMn0XptaXjzVsYp+ibRG4E8CJC5A2Ur54DeJPHgBmeKU0Vpx o+wjNW4w05O5/G/hvD1XeSamyYbv5mL8E3/hai+weG6x1oYwsP7FlCffqYTSeGKiPnDS 1tXA==; dara=google.com ARC-Authentication-Results: i=2; mx.google.com; dkim=pass header.i=@qq.com header.s=s201512 header.b=UPRH5TTH; arc=pass (i=1 spf=pass spfdomain=qq.com dkim=pass dkdomain=qq.com dmarc=pass fromdomain=qq.com); spf=pass (google.com: domain of linux-kernel+bounces-98842-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:45d1:ec00::1 as permitted sender) smtp.mailfrom="linux-kernel+bounces-98842-linux.lists.archive=gmail.com@vger.kernel.org"; dmarc=pass (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=qq.com Return-Path: Received: from ny.mirrors.kernel.org (ny.mirrors.kernel.org. [2604:1380:45d1:ec00::1]) by mx.google.com with ESMTPS id bp42-20020a05620a45aa00b007884dab2badsi5539769qkb.345.2024.03.11.05.49.51 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 11 Mar 2024 05:49:51 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel+bounces-98842-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:45d1:ec00::1 as permitted sender) client-ip=2604:1380:45d1:ec00::1; Authentication-Results: mx.google.com; dkim=pass header.i=@qq.com header.s=s201512 header.b=UPRH5TTH; arc=pass (i=1 spf=pass spfdomain=qq.com dkim=pass dkdomain=qq.com dmarc=pass fromdomain=qq.com); spf=pass (google.com: domain of linux-kernel+bounces-98842-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:45d1:ec00::1 as permitted sender) smtp.mailfrom="linux-kernel+bounces-98842-linux.lists.archive=gmail.com@vger.kernel.org"; dmarc=pass (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=qq.com Received: from smtp.subspace.kernel.org (wormhole.subspace.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ny.mirrors.kernel.org (Postfix) with ESMTPS id 378571C21435 for ; Mon, 11 Mar 2024 12:49:51 +0000 (UTC) Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 11C263BB29; Mon, 11 Mar 2024 12:49:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=qq.com header.i=@qq.com header.b="UPRH5TTH" Received: from out162-62-58-216.mail.qq.com (out162-62-58-216.mail.qq.com [162.62.58.216]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C1DF41364 for ; Mon, 11 Mar 2024 12:49:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=162.62.58.216 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710161385; cv=none; b=G3Q7rNm430RkefaXIYDU0Ccdi2ewC47YyyACdqY1VURsZyu5xjymkbZeCPAsMK0tt/1h1nR64Dc50tWM/wCkjhKgVwkbndh2x1ExDfXMmz9OSXf4x4JMJlvmBeG8uA1NTsrjml44akbP7rB2PC6fztvrzzRIpVASm49QnPAZZGM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710161385; c=relaxed/simple; bh=jhiwJhcKVBRZIdqpk4E2dgcKQXEmHWRcfgca5ia865s=; h=Message-ID:From:To:Cc:Subject:Date:In-Reply-To:References: MIME-Version; b=ZBYfJ6gaMK5jc0ToAFX+UPs9fLsbadgzwLHrs08pkqMj3MdVDahb8K/vv0Rdy5CBSJ/55ECMDcfeZ+Yd3cplfaPDcNwtBZZ3ykPmQgibvqtUg289miuiy/1IRbE0SDSDSOthav1oEpxa6RcmhsDDlwefIuuwiR8HaTbOSamRtus= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=qq.com; spf=pass smtp.mailfrom=qq.com; dkim=pass (1024-bit key) header.d=qq.com header.i=@qq.com header.b=UPRH5TTH; arc=none smtp.client-ip=162.62.58.216 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=qq.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=qq.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=qq.com; s=s201512; t=1710161076; bh=tLb6KWZBoxGV0fA+3X/ShT89VgoRxqI6W6b+OTUce/M=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=UPRH5TTHAA5W4ke8bDBV2RPbnylBiihGIrHsEpyLVUgUtdMaHqwSSWpF5Z4G7kblc DlCtwI6PsiqAP5KKbL1sCvAyO7WIKh7Ba+DjmQc90vlkIMFJZroWa1yMUnp0pRdM3O 3pR3at1YTWPL7DMuObUv0oX3TpDZxfAtkP7ve2NY= Received: from pek-lxu-l1.wrs.com ([2408:8409:ce0:38d1:a032:4bf1:303d:acae]) by newxmesmtplogicsvrszc5-0.qq.com (NewEsmtp) with SMTP id B22A8861; Mon, 11 Mar 2024 20:44:34 +0800 X-QQ-mid: xmsmtpt1710161074tbdinx252 Message-ID: X-QQ-XMAILINFO: NyTsQ4JOu2J2NvXWLetB1rP6VE8ZT9+4Wd73MXKvJUzIVsyC7VsmFgHvcGDX7S TTpB5EB7ZNVKqhq3Prsg+NkX2kKxedsz+Y952Q0Hqy/TwzlRgHCGASy9M5lfJvo+DTEoUd1wJuG4 gb9LvUt7veo11P/U99QDsfP+RltGO897ybEzWrWWH1ZgleL5U4yNDdqOs1T0AR3hcDmJDtf5EoPs o/2W/fENO+Nu6Dib/UIJIYBFsB5XV9KC9o4M0LcSWvubXogHIFEbF25lP6a926qc7efejgZyClKm JC5FY3DWxmylw+gUA0VHWpSB/Z13BzUQmOK0EF+8FNtNU3EDN8zEcq04Kc2sbkJmg1EZpLkURq10 QTNE3hXjNIPVOl3v6ACQvwf/vf+TFE4Js9est3xuG08wA4epizmpoMfCTRaEcWXifBvHe+i+IceO 7SaxxA5IrJ3hm8/PfuuXaOtOlfiUscuCAQrU4crJqqvIJ0rezX+GkP97ZMj3PaaNmu6Qz+fcwOHk vxFnkwgtDIgsGemfvBENV7E26tdKIlpCSc9QdJh0ZH5cCEW/Okv0zvnLnQJrSX4Xc5v402GHSfFN 3se7N1BCFw4O4N74d9BL31PyJhnvkMtgdIX8/QcyQrJfmKcllPenjNEtKOdqsVPNtY4orhf+N8cG Fe4y/3obPDAOCm34YmBLrdp05FYvLoRA7+E2xRrghfI+szpn6UHXH2tzPXzQlM03ArwMyt6cYNtp OEr633lp+drsI63HVoRN4M5o6jg5dT1can7Tvj7AEAlBXp5LL6XDKlFZxpbwcqVzKzLeaNHUOh/U hczA8KFOZOm2aS4k4yXKH6LghpW++ZsFQF/jJCopYV50M0HNHkTZUjWvIY3/NSppF0CZG23iAhFO LdbALPcJWy10KXYyJrkV0E7sKlYNFQh7iiKfA8/1eMVoRngsTvpMJDOVlQ+DpK9w== X-QQ-XMRINFO: NI4Ajvh11aEj8Xl/2s1/T8w= From: Edward Adam Davis To: syzbot+cc32304f6487ebff9b70@syzkaller.appspotmail.com Cc: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Subject: Re: [syzbot] [bpf?] KASAN: slab-out-of-bounds Read in btf_datasec_check_meta Date: Mon, 11 Mar 2024 20:44:30 +0800 X-OQ-MSGID: <20240311124429.125440-2-eadavis@qq.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <00000000000081fb0d06135eb3ca@google.com> References: <00000000000081fb0d06135eb3ca@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit please test oob in btf_datasec_check_meta #syz test https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master diff --git a/kernel/bpf/btf.c b/kernel/bpf/btf.c index 170d017e8e4a..dda0aa0d7175 100644 --- a/kernel/bpf/btf.c +++ b/kernel/bpf/btf.c @@ -816,6 +816,8 @@ static bool btf_name_valid_section(const struct btf *btf, u32 offset) const char *src = btf_str_by_offset(btf, offset); const char *src_limit; + if (!isprint(*src)) + return false; /* set a limit on identifier length */ src_limit = src + KSYM_NAME_LEN; src++;