From patchwork Mon Feb 6 22:25:08 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ilya Leoshkevich X-Patchwork-Id: 64376 Return-Path: X-Original-To: patchwork@sourceware.org Delivered-To: patchwork@sourceware.org Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id 262C13858032 for ; Mon, 6 Feb 2023 22:25:49 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 262C13858032 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sourceware.org; s=default; t=1675722349; bh=DfH/TxOI+lr+duP+WJOmRe1UPBGlY4pkGNom8bIZ0jw=; h=To:Cc:Subject:Date:In-Reply-To:References:List-Id: List-Unsubscribe:List-Archive:List-Help:List-Subscribe:From: Reply-To:From; b=mFaroizH0OZiONBiyfqdNzgVGmNCKQV3I5h5K1G66DZslvztskXvXqX2PHyCdlu2M pAmtLhqagl2lBalXfK1fJrOHN8aQ3k2hLLK6aS3MI3PwBPyxgzsgg/38k/V4KCrtZA w9NikVE00E99E/BKhcHfpifCDJayoie8XR6SK2ms= X-Original-To: elfutils-devel@sourceware.org Delivered-To: elfutils-devel@sourceware.org Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) by sourceware.org (Postfix) with ESMTPS id 51191385843D for ; 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Mon, 6 Feb 2023 22:25:29 GMT Received: from smtpav06.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 48D4020076; Mon, 6 Feb 2023 22:25:29 +0000 (GMT) Received: from smtpav06.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id EFE4520074; Mon, 6 Feb 2023 22:25:28 +0000 (GMT) Received: from heavy.lan (unknown [9.179.9.231]) by smtpav06.fra02v.mail.ibm.com (Postfix) with ESMTP; Mon, 6 Feb 2023 22:25:28 +0000 (GMT) To: elfutils-devel@sourceware.org Cc: Ilya Leoshkevich Subject: [PATCH RFC 06/11] Initialize reglocs for VMCOREINFO Date: Mon, 6 Feb 2023 23:25:08 +0100 Message-Id: <20230206222513.1773039-7-iii@linux.ibm.com> X-Mailer: git-send-email 2.39.1 In-Reply-To: <20230206222513.1773039-1-iii@linux.ibm.com> References: <20230206222513.1773039-1-iii@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: q_HoCzG5fjowhNy2VLtl25OpNwVinIGe X-Proofpoint-GUID: q_HoCzG5fjowhNy2VLtl25OpNwVinIGe X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.219,Aquarius:18.0.930,Hydra:6.0.562,FMLib:17.11.122.1 definitions=2023-02-06_07,2023-02-06_03,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 phishscore=0 malwarescore=0 mlxscore=0 mlxlogscore=770 impostorscore=0 clxscore=1015 adultscore=0 lowpriorityscore=0 priorityscore=1501 bulkscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2212070000 definitions=main-2302060191 X-Spam-Status: No, score=-11.8 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_EF, GIT_PATCH_0, SPF_HELO_NONE, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org X-BeenThere: elfutils-devel@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Elfutils-devel mailing list List-Unsubscribe: , List-Archive: List-Help: List-Subscribe: , X-Patchwork-Original-From: Ilya Leoshkevich via Elfutils-devel From: Ilya Leoshkevich Reply-To: Ilya Leoshkevich Errors-To: elfutils-devel-bounces+patchwork=sourceware.org@sourceware.org Sender: "Elfutils-devel" MSan complains: Uninitialized value was created by an allocation of 'reglocs' in the stack frame #0 0x562d35c686f0 in handle_core_note elfutils/src/readelf.c:12674:3 #const Ebl_Register_Location *reglocs; ==1006199==WARNING: MemorySanitizer: use-of-uninitialized-value #0 0x562d35c68a2a in handle_core_note elfutils/src/readelf.c:12692:11 #colno = handle_core_registers (ebl, ebl->elf, desc + regs_offset, # reglocs, nregloc); Strictly speaking, this is not a problem, because nregloc == 0, but for other note types we initialize it anyway, so do it here as well. Signed-off-by: Ilya Leoshkevich --- backends/linux-core-note.c | 1 + 1 file changed, 1 insertion(+) diff --git a/backends/linux-core-note.c b/backends/linux-core-note.c index 9faae4c3..238ec16d 100644 --- a/backends/linux-core-note.c +++ b/backends/linux-core-note.c @@ -239,6 +239,7 @@ EBLHOOK(core_note) (const GElf_Nhdr *nhdr, const char *name, return 0; *regs_offset = 0; *nregloc = 0; + *reglocs = NULL; *nitems = 1; *items = vmcoreinfo_items; return 1;