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([202.185.212.207]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-7042dff35fdsm6928961b3a.131.2024.06.12.05.44.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 12 Jun 2024 05:44:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1718196273; x=1718801073; 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=nptw2utT3cflhovZk/xEgGBnD/tuGQdekWiabPUKqzM=; b=Xm+w4JrvyzoRC+6ngngeecT5NznLFGz4diJH4fX9bMlUhVOpBibFQYHfS+wI3UzXVT p6NfOGI3JbY77RMzIy7sgUtl70q+J3nR528rM2zquCdAth3i8WJiEJt6WkZmXZrXBUTP SxH0ezRTXXGftlUpAc13KKA5gF3D9Qyse2l/7ilzzaHkJVydSt2TAPM+56nZu9XHtbhz G2ZWkYXa+Z3DH5H8TXBVVj2n2gi5fKobahZ42Z0W1uqUXBVTzAVwzvWncoWaMZAyt8Fk 661/Z6p1KM+qkK1JOH8YA5f/DqUJKxuFvdz5i64r1OI4vR0CNhUp16hmrVoK367kf+wR 3UPw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1718196273; x=1718801073; 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=nptw2utT3cflhovZk/xEgGBnD/tuGQdekWiabPUKqzM=; b=QQM71UQUXn+j7A252WEl7Tk6na8my7GhYz0yBSRWfaSiLu+K+M4l6c0Wg5/PIPdltL 2uUEDr4m0RSJUwSRPrlr90XxIjMW6ptjNZPM5BaUc4G8L+Zppm3MevPhenUmZfi4dDFK UdW+I7ExC4aXCXnZAB3YXSVpYWsTwkwOHgtH9tdo/ZF6mtivDaTykdwyVcEKnxnyAwrC J9GtB+0Yybul/kKbNzPvsyEu3T1ABPf0SMgeDyXMxI2UeHLcy4M5wjiuHc9Oi2kbNoqa 79nElrnsXmbvHBqUybLP7+ajZd0gVW2iNt2jgcmlE5dJnr5N8sYC8HLSPqgRT7QLW8z2 8ilQ== X-Forwarded-Encrypted: i=1; AJvYcCVnyYktLyxzWLc+7vhTfnLihWtHcQYiHncRZpRPcy21ymjzcx2tjzz2nKd7shIG6KvBtRbY2V0lx+IFyE9VAtGChZJABGc= X-Gm-Message-State: AOJu0YxKI/K4f6VXshUSxQ7jjy4eREiu0i7HwFnuGhPyHIz+DoXaFfFa aphuVKpk21xNUiQeUIyeG4Yh4OfNry61RkIFp6bJvIfcfZay0TCGJU6bkJfa23A= X-Google-Smtp-Source: AGHT+IFJDvXWcHdMt54s+ktF341ZC3YbtK1q2lCRncETZ+mHRjQ/rLfxsOVN/vVEoTwkxMjbDKlSIg== X-Received: by 2002:a05:6a00:4b54:b0:705:b121:3557 with SMTP id d2e1a72fcca58-705bce06ca3mr2233780b3a.9.1718196272753; Wed, 12 Jun 2024 05:44:32 -0700 (PDT) From: Amjad Alsharafi To: qemu-devel@nongnu.org Cc: Hanna Reitz , Kevin Wolf , "open list:vvfat" , Amjad Alsharafi Subject: [PATCH v5 2/5] vvfat: Fix usage of `info.file.offset` Date: Wed, 12 Jun 2024 20:43:23 +0800 Message-ID: X-Mailer: git-send-email 2.45.1 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::42e; envelope-from=amjadsharafi10@gmail.com; helo=mail-pf1-x42e.google.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 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, 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-ZohoMail-DKIM: pass (identity @gmail.com) X-ZM-MESSAGEID: 1718196359690100003 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 2.45.1