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plugins/flashrom/fu-flashrom-device.c: create layout on open

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This avoids possible reading IFD multiple times and fixes a memory leak
of layout on errors and an unconditional leak in
fu_flashrom_device_prepare(), which didn't call
flashrom_layout_release().

Notice that flashrom_layout_set() call does NOT transfer ownership.

Signed-off-by: Sergii Dmytruk <sergii.dmytruk@3mdeb.com>
This commit is contained in:
Sergii Dmytruk 2022-04-19 23:45:44 +03:00 committed by Richard Hughes
parent e1d708a4ff
commit e9f765dc47
1 changed files with 45 additions and 41 deletions
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86
plugins/flashrom/fu-flashrom-device.c
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@ -28,6 +28,7 @@ struct _FuFlashromDevice {
FuUdevDevice parent_instance;
FuIfdRegion region;
struct flashrom_flashctx *flashctx;
struct flashrom_layout *layout;
};
G_DEFINE_TYPE(FuFlashromDevice, fu_flashrom_device, FU_TYPE_UDEV_DEVICE)
@ -80,6 +81,7 @@ static gboolean
fu_flashrom_device_open(FuDevice *device, GError **error)
{
FuFlashromDevice *self = FU_FLASHROM_DEVICE(device);
struct flashrom_layout *layout;
/* get the flash size from the device if not already been quirked */
if (fu_device_get_firmware_size_max(device) == 0) {
@ -94,6 +96,44 @@ fu_flashrom_device_open(FuDevice *device, GError **error)
fu_device_set_firmware_size_max(device, flash_size);
}
if (flashrom_layout_read_from_ifd(&layout, self->flashctx, NULL, 0)) {
g_set_error_literal(error,
FWUPD_ERROR,
FWUPD_ERROR_READ,
"failed to read layout from Intel ICH descriptor");
return FALSE;
}
/* update only one specific region of the flash and do not touch others */
if (flashrom_layout_include_region(layout, fu_ifd_region_to_string(self->region))) {
flashrom_layout_release(layout);
g_set_error_literal(error,
FWUPD_ERROR,
FWUPD_ERROR_NOT_SUPPORTED,
"invalid region name");
return FALSE;
}
/* flashrom_layout_set() doesn't transfer ownership, so we must manage layout's lifetime */
self->layout = layout;
flashrom_layout_set(self->flashctx, self->layout);
return TRUE;
}
static gboolean
fu_flashrom_device_close(FuDevice *device, GError **error)
{
FuFlashromDevice *self = FU_FLASHROM_DEVICE(device);
if (self->layout != NULL) {
flashrom_layout_release(self->layout);
self->layout = NULL;
flashrom_layout_set(self->flashctx, NULL);
}
return TRUE;
}
@ -115,31 +155,10 @@ fu_flashrom_device_prepare(FuDevice *device,
if (!fu_common_mkdir_parent(firmware_orig, error))
return FALSE;
if (!g_file_test(firmware_orig, G_FILE_TEST_EXISTS)) {
struct flashrom_layout *layout;
gsize flash_size = fu_device_get_firmware_size_max(device);
g_autofree guint8 *newcontents = g_malloc0(flash_size);
g_autoptr(GBytes) buf = NULL;
if (flashrom_layout_read_from_ifd(&layout, self->flashctx, NULL, 0)) {
g_set_error_literal(error,
FWUPD_ERROR,
FWUPD_ERROR_READ,
"failed to read layout from Intel ICH descriptor");
return FALSE;
}
/* update only one specific region of the flash and do not touch others */
if (flashrom_layout_include_region(layout, fu_ifd_region_to_string(self->region))) {
g_set_error_literal(error,
FWUPD_ERROR,
FWUPD_ERROR_NOT_SUPPORTED,
"invalid region name");
return FALSE;
}
/* read region */
flashrom_layout_set(self->flashctx, layout);
fu_progress_set_status(progress, FWUPD_STATUS_DEVICE_READ);
if (flashrom_image_read(self->flashctx, newcontents, flash_size)) {
g_set_error_literal(error,
@ -164,7 +183,6 @@ fu_flashrom_device_write_firmware(FuDevice *device,
GError **error)
{
FuFlashromDevice *self = FU_FLASHROM_DEVICE(device);
struct flashrom_layout *layout;
gsize sz = 0;
gint rc;
const guint8 *buf;
@ -182,25 +200,7 @@ fu_flashrom_device_write_firmware(FuDevice *device,
return FALSE;
buf = g_bytes_get_data(blob_fw, &sz);
if (flashrom_layout_read_from_ifd(&layout, self->flashctx, NULL, 0)) {
g_set_error_literal(error,
FWUPD_ERROR,
FWUPD_ERROR_READ,
"failed to read layout from Intel ICH descriptor");
return FALSE;
}
/* update only one specific region of the flash and do not touch others */
if (flashrom_layout_include_region(layout, fu_ifd_region_to_string(self->region))) {
g_set_error_literal(error,
FWUPD_ERROR,
FWUPD_ERROR_NOT_SUPPORTED,
"invalid region name");
return FALSE;
}
/* write region */
flashrom_layout_set(self->flashctx, layout);
if (sz != fu_device_get_firmware_size_max(device)) {
g_set_error(error,
FWUPD_ERROR,
@ -226,7 +226,6 @@ fu_flashrom_device_write_firmware(FuDevice *device,
return FALSE;
}
fu_progress_step_done(progress);
flashrom_layout_release(layout);
/* Check if CMOS needs a reset */
if (fu_device_has_private_flag(device, FU_FLASHROM_DEVICE_FLAG_RESET_CMOS)) {
@ -321,6 +320,10 @@ fu_flashrom_device_set_property(GObject *object,
static void
fu_flashrom_device_finalize(GObject *object)
{
FuFlashromDevice *self = FU_FLASHROM_DEVICE(object);
if (self->layout != NULL)
flashrom_layout_release(self->layout);
G_OBJECT_CLASS(fu_flashrom_device_parent_class)->finalize(object);
}
@ -365,6 +368,7 @@ fu_flashrom_device_class_init(FuFlashromDeviceClass *klass)
klass_device->set_quirk_kv = fu_flashrom_device_set_quirk_kv;
klass_device->probe = fu_flashrom_device_probe;
klass_device->open = fu_flashrom_device_open;
klass_device->close = fu_flashrom_device_close;
klass_device->set_progress = fu_flashrom_device_set_progress;
klass_device->prepare = fu_flashrom_device_prepare;
klass_device->write_firmware = fu_flashrom_device_write_firmware;