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envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::636; envelope-from=gregorhaas1997@gmail.com; helo=mail-pl1-x636.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: 1719599326655100001 Content-Type: text/plain; charset="utf-8" The read() syscall is not guaranteed to return all data from a file. The default ROM loader implementation currently does not take this into account, instead failing if all bytes are not read at once. This change loads the ROM using g_file_get_contents() instead, which correctly reads all data using multiple calls to read() while also returning the loaded ROM size. Signed-off-by: Gregor Haas Reviewed-by: Daniel P. Berrang=C3=A9 Reviewed-by: Philippe Mathieu-Daud=C3=A9 Reviewed-by: Xingtao Yao --- hw/core/loader.c | 30 +++++------------------------- 1 file changed, 5 insertions(+), 25 deletions(-) diff --git a/hw/core/loader.c b/hw/core/loader.c index 2f8105d7de..44444a5714 100644 --- a/hw/core/loader.c +++ b/hw/core/loader.c @@ -1075,8 +1075,7 @@ ssize_t rom_add_file(const char *file, const char *fw= _dir, { MachineClass *mc =3D MACHINE_GET_CLASS(qdev_get_machine()); Rom *rom; - ssize_t rc; - int fd =3D -1; + g_autoptr(GError) gerr =3D NULL; char devpath[100]; =20 if (as && mr) { @@ -1094,35 +1093,19 @@ ssize_t rom_add_file(const char *file, const char *= fw_dir, rom->path =3D g_strdup(file); } =20 - fd =3D open(rom->path, O_RDONLY | O_BINARY); - if (fd =3D=3D -1) { - fprintf(stderr, "Could not open option rom '%s': %s\n", - rom->path, strerror(errno)); - goto err; - } - if (fw_dir) { rom->fw_dir =3D g_strdup(fw_dir); rom->fw_file =3D g_strdup(file); } rom->addr =3D addr; - rom->romsize =3D lseek(fd, 0, SEEK_END); - if (rom->romsize =3D=3D -1) { - fprintf(stderr, "rom: file %-20s: get size error: %s\n", - rom->name, strerror(errno)); + if (!g_file_get_contents(rom->path, (gchar **) &rom->data, + &rom->romsize, &gerr)) { + fprintf(stderr, "rom: file %-20s: error %s\n", + rom->name, gerr->message); goto err; } =20 rom->datasize =3D rom->romsize; - rom->data =3D g_malloc0(rom->datasize); - lseek(fd, 0, SEEK_SET); - rc =3D read(fd, rom->data, rom->datasize); - if (rc !=3D rom->datasize) { - fprintf(stderr, "rom: file %-20s: read error: rc=3D%zd (expected %= zd)\n", - rom->name, rc, rom->datasize); - goto err; - } - close(fd); rom_insert(rom); if (rom->fw_file && fw_cfg) { const char *basename; @@ -1159,9 +1142,6 @@ ssize_t rom_add_file(const char *file, const char *fw= _dir, return 0; =20 err: - if (fd !=3D -1) - close(fd); - rom_free(rom); return -1; } --=20 2.45.2