From nobody Sun Nov 24 06:39:37 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1725622101831556.1720713494842; Fri, 6 Sep 2024 04:28:21 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1smWyP-0002lR-Fh; Fri, 06 Sep 2024 07:17:55 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1smWxh-0008U8-DF; Fri, 06 Sep 2024 07:17:10 -0400 Received: from isrv.corpit.ru ([86.62.121.231]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1smWxf-0008A1-NJ; Fri, 06 Sep 2024 07:17:09 -0400 Received: from tsrv.corpit.ru (tsrv.tls.msk.ru [192.168.177.2]) by isrv.corpit.ru (Postfix) with ESMTP id 470B18C49B; Fri, 6 Sep 2024 14:12:09 +0300 (MSK) Received: from tls.msk.ru (mjt.wg.tls.msk.ru [192.168.177.130]) by tsrv.corpit.ru (Postfix) with SMTP id 53F22133704; Fri, 6 Sep 2024 14:13:27 +0300 (MSK) Received: (nullmailer pid 353681 invoked by uid 1000); Fri, 06 Sep 2024 11:13:24 -0000 From: Michael Tokarev To: qemu-devel@nongnu.org Cc: qemu-stable@nongnu.org, Amjad Alsharafi , Kevin Wolf , Michael Tokarev Subject: [Stable-9.0.3 42/69] vvfat: Fix usage of `info.file.offset` Date: Fri, 6 Sep 2024 14:12:51 +0300 Message-Id: <20240906111324.353230-42-mjt@tls.msk.ru> X-Mailer: git-send-email 2.39.2 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=86.62.121.231; envelope-from=mjt@tls.msk.ru; helo=isrv.corpit.ru X-Spam_score_int: -68 X-Spam_score: -6.9 X-Spam_bar: ------ X-Spam_report: (-6.9 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_HI=-5, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZM-MESSAGEID: 1725622103119116600 Content-Type: text/plain; charset="utf-8" From: Amjad Alsharafi The field is marked as "the offset in the file (in clusters)", but it was being used like this `cluster_size*(nums)+mapping->info.file.offset`, which is incorrect. Signed-off-by: Amjad Alsharafi Reviewed-by: Kevin Wolf Message-ID: <72f19a7903886dda1aa78bcae0e17702ee939262.1721470238.git.amjads= harafi10@gmail.com> Signed-off-by: Kevin Wolf (cherry picked from commit 21b25a0e466a5bba0a45600bb8100ab564202ed1) Signed-off-by: Michael Tokarev diff --git a/block/vvfat.c b/block/vvfat.c index 19da009a5b..247b232608 100644 --- a/block/vvfat.c +++ b/block/vvfat.c @@ -1408,7 +1408,9 @@ read_cluster_directory: =20 assert(s->current_fd); =20 - offset=3Ds->cluster_size*(cluster_num-s->current_mapping->begin)+s= ->current_mapping->info.file.offset; + offset =3D s->cluster_size * + ((cluster_num - s->current_mapping->begin) + + s->current_mapping->info.file.offset); if(lseek(s->current_fd, offset, SEEK_SET)!=3Doffset) return -3; s->cluster=3Ds->cluster_buffer; @@ -1929,8 +1931,9 @@ get_cluster_count_for_direntry(BDRVVVFATState* s, dir= entry_t* direntry, const ch (mapping->mode & MODE_DIRECTORY) =3D=3D 0) { =20 /* was modified in qcow */ - if (offset !=3D mapping->info.file.offset + s->cluster= _size - * (cluster_num - mapping->begin)) { + if (offset !=3D s->cluster_size + * ((cluster_num - mapping->begin) + + mapping->info.file.offset)) { /* offset of this cluster in file chain has change= d */ abort(); copy_it =3D 1; @@ -2404,7 +2407,7 @@ static int commit_mappings(BDRVVVFATState* s, (mapping->end - mapping->begin); } else next_mapping->info.file.offset =3D mapping->info.file.offs= et + - mapping->end - mapping->begin; + (mapping->end - mapping->begin); =20 mapping =3D next_mapping; } --=20 2.39.2