From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pl1-x62b.google.com (mail-pl1-x62b.google.com [IPv6:2607:f8b0:4864:20::62b]) by sourceware.org (Postfix) with ESMTPS id 726CD3858425 for ; Wed, 21 Dec 2022 07:28:57 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 726CD3858425 Authentication-Results: sourceware.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=gmail.com Received: by mail-pl1-x62b.google.com with SMTP id d3so14684931plr.10 for ; Tue, 20 Dec 2022 23:28:57 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-disposition:mime-version:message-id:subject:to:from:date :from:to:cc:subject:date:message-id:reply-to; bh=d36JwQqy/ERQumT8xIuHkyUGsys50DH10H0MbZan2BE=; b=mz19tSJK8/CV++YcKxJLQI3YnQWW44hstgA94n1JuX/Q5V0K5zIxFjCKv0Y2X94r/u rsH/WAt3y8elJm95LzNHlcn/OwzqdS5/dSyfVM2eOWjkI8S4ySLQqZiWBNLjDl2zcrPl VNrCK0xPtYe7oFQa9G3HC1MFP2kVHqwtCdytJ4ke+0/180tEt/EsaTKZGO1RF+JVtLrD aMM+/HAZDYl9+9iFn7bwqwz5Q9DfbG+DZYMR2qaQIC23vRPCPLV51GhVs7EK2icVLN5w mY5KlIauoSGoynRIhlrI5Qpzefm3MJFJWwW+EpU7uoO3jRCVaCz8xLXbOigUESXrsjDa ToIg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-disposition:mime-version:message-id:subject:to:from:date :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=d36JwQqy/ERQumT8xIuHkyUGsys50DH10H0MbZan2BE=; b=AxK3q/K7bUt+Zg84bbZUuz9BeR9apDUrWETV8QPMDFollWB5m3bxh5FDxtZy5xp0LD KsBVoziObXNKMKQvFfPySogpjOWRsT8g9LungJ/iUPrI1GfqEsmfCZRzchKElwP5zDGH 72NgGEbNcEVAZHGNo/T0OIDbTNDDUDoGF6Wn6/oeU5nFWySkFxWIYGt1UsFjz7pBONFQ fsp5iQ6D0WEF9N44IiWYWMf1H+TWUI/8FQzqnVvqG95HBVxic9zhFdtLG8ZMw7sBxyzt o2SIJTsA1OH/IOVu0mQzVCEVDEOfAdde9/LqeYwd0CLAX1pQepeXqn8Ikx4UM+Y3w6px oibA== X-Gm-Message-State: AFqh2kp8kR5PXJxQE1nspNBhiT1hhbBN3Z2y/1bz18xXDovt3QtX++mD 8v8miLyJOqyAalse0az+NRu1gi28YdM= X-Google-Smtp-Source: AMrXdXufssNlmcq73Aj6LJmMNZxutnM+WEsrP2FDqu7eRAWdfB5MSoRnwb5hYtD/P2XjDEhoWv3xyg== X-Received: by 2002:a05:6a20:1446:b0:af:7989:2579 with SMTP id a6-20020a056a20144600b000af79892579mr22410674pzi.32.1671607736291; Tue, 20 Dec 2022 23:28:56 -0800 (PST) Received: from squeak.grove.modra.org ([2406:3400:51d:8cc0:ce12:61a:16be:8722]) by smtp.gmail.com with ESMTPSA id x6-20020a17090a2b0600b0021885b05660sm711323pjc.24.2022.12.20.23.28.55 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 20 Dec 2022 23:28:55 -0800 (PST) Received: by squeak.grove.modra.org (Postfix, from userid 1000) id 7160A1140321; Wed, 21 Dec 2022 17:58:53 +1030 (ACDT) Date: Wed, 21 Dec 2022 17:58:53 +1030 From: Alan Modra To: binutils@sourceware.org Subject: PR29922, SHT_NOBITS section avoids section size sanity check Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline X-Spam-Status: No, score=-3035.3 required=5.0 tests=BAYES_00,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FROM,GIT_PATCH_0,RCVD_IN_DNSWL_NONE,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 List-Id: PR 29922 * dwarf2.c (find_debug_info): Ignore sections without SEC_HAS_CONTENTS. diff --git a/bfd/dwarf2.c b/bfd/dwarf2.c index 95f45708e9d..0cd8152ee6e 100644 --- a/bfd/dwarf2.c +++ b/bfd/dwarf2.c @@ -4831,16 +4831,19 @@ find_debug_info (bfd *abfd, const struct dwarf_debug_section *debug_sections, { look = debug_sections[debug_info].uncompressed_name; msec = bfd_get_section_by_name (abfd, look); - if (msec != NULL) + /* Testing SEC_HAS_CONTENTS is an anti-fuzzer measure. Of + course debug sections always have contents. */ + if (msec != NULL && (msec->flags & SEC_HAS_CONTENTS) != 0) return msec; look = debug_sections[debug_info].compressed_name; msec = bfd_get_section_by_name (abfd, look); - if (msec != NULL) + if (msec != NULL && (msec->flags & SEC_HAS_CONTENTS) != 0) return msec; for (msec = abfd->sections; msec != NULL; msec = msec->next) - if (startswith (msec->name, GNU_LINKONCE_INFO)) + if ((msec->flags & SEC_HAS_CONTENTS) != 0 + && startswith (msec->name, GNU_LINKONCE_INFO)) return msec; return NULL; @@ -4848,6 +4851,9 @@ find_debug_info (bfd *abfd, const struct dwarf_debug_section *debug_sections, for (msec = after_sec->next; msec != NULL; msec = msec->next) { + if ((msec->flags & SEC_HAS_CONTENTS) == 0) + continue; + look = debug_sections[debug_info].uncompressed_name; if (strcmp (msec->name, look) == 0) return msec; -- Alan Modra Australia Development Lab, IBM