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([202.185.212.207]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-2cb76a5fc6csm4411208a91.0.2024.07.20.03.13.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 20 Jul 2024 03:13:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1721470429; x=1722075229; darn=nongnu.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=Z0TcqHDGmq+zPmeeTD6pafWi3xRQRQCgCCjNIOd26LE=; b=hSsbivDy3fMpaiJsC9lWG/ovuShdG6cwIx6sNTnRhO3ECV5xT3Uuy/3S9j8SR3slRu HLCPPlV36MPEmcibVIOF03b+Ya5yvjtuRlXVC1wMDSA4GUwU3+7KywfxLDRa/2H2UqQ7 6xO1wL7/BNbkh4hqFEkXtBQTLUJz6E2+2X16T5MI0m6RUkYbwjOmaT9kR/5Vh6d0Qg1G m+UnjX36f8NTSucQeY4wtfNeDhOCJU6skH7ZYyqJDEBm4SAzpPi7oUt6aGKLpXDkOAr6 ntg2cb79MKkvSIc2rKHh5Oe/tRsHDZrqXYyF/UbN3jZHPsJ1iQLkuQwQQZ2Ip5e+omId Ca1g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1721470429; x=1722075229; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=Z0TcqHDGmq+zPmeeTD6pafWi3xRQRQCgCCjNIOd26LE=; b=ZNDzBY9gxwIpMcNjMk0bFYeOueBeVS7osIAXd42lbrGjl762TvDAhoT69WUU3IQrHj 2NRvGqovYEQttzmXfnzQLXlP/4Y/FfubaHY7Ab3IrgK0pjUDg5lTdIUa+xSbnifXEpwv chp5a88fySY3fzqyZoqFdoLqLXGzdCCl0mj/3blYG/7pYRYwh7oIccTwcAMSvseeytsI Sz5PI6RHueBTW0LW3QTsIXjk83XIo3PJrU2aDinmxkrRvwmxqGBwBxma3kmZwQLmDDhx gfMy75Tf1vUaZ0oUxkgZYlDApJMoEUwA6KlQGc+8Z8e9s25AmznZ0QXEZgsGf2VFguiO yA+A== X-Forwarded-Encrypted: i=1; AJvYcCXx8Sf2ObEMosuWlxlgH/Er1VRkbA0H1v0peMsquBCQhUtKj9xOGdu9lWo4ZOdirjiKZ1TMsXcFhB19UTIisZSHyEPW9TM= X-Gm-Message-State: AOJu0Ywy2f8U0MVx+bGKPh+fOeABj+FdBupCBh05K6N9weOeSWtN/U/g KT+h4c7Ich1deV6D3DEaA3MPKqiKXQ+SH3/kUNYPSqqoA8fO1TIeUL1X29Xem/EymQ== X-Google-Smtp-Source: AGHT+IEx3eZ2+QDRU3KSgCx+OV+pBNRFvlIeIxRWjJ8O0yjzM4DTtM3tHEIt/k5BZ6oeQUtPwypRXw== X-Received: by 2002:a05:6358:726:b0:1a5:f991:ae54 with SMTP id e5c5f4694b2df-1acc5c4b72cmr244477255d.20.1721470428817; Sat, 20 Jul 2024 03:13:48 -0700 (PDT) From: Amjad Alsharafi To: qemu-devel@nongnu.org Cc: Hanna Reitz , Kevin Wolf , "open list:vvfat" , Amjad Alsharafi Subject: [PATCH v6 2/5] vvfat: Fix usage of `info.file.offset` Date: Sat, 20 Jul 2024 18:13:31 +0800 Message-ID: <72f19a7903886dda1aa78bcae0e17702ee939262.1721470238.git.amjadsharafi10@gmail.com> X-Mailer: git-send-email 2.45.2 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=2607:f8b0:4864:20::c2a; envelope-from=amjadsharafi10@gmail.com; helo=mail-oo1-xc2a.google.com X-Spam_score_int: -17 X-Spam_score: -1.8 X-Spam_bar: - X-Spam_report: (-1.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_ENVFROM_END_DIGIT=0.25, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 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-ZohoMail-DKIM: pass (identity @gmail.com) X-ZM-MESSAGEID: 1721470503786116600 Content-Type: text/plain; charset="utf-8" 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 --- block/vvfat.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) 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 2.45.2