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| author | Armin Wolf <W_Armin@gmx.de> | 2026-04-06 22:32:36 +0200 |
|---|---|---|
| committer | Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> | 2026-04-13 14:11:25 +0300 |
| commit | 1aeded2f55f04fafb07b01e12142fd20c2a3d288 (patch) | |
| tree | 83f906403dea26bec37e305410451243ff2d061e /drivers/platform/x86/intel | |
| parent | 96b1b053e10d89f666a37b52be25ed4294e342be (diff) | |
| download | lwn-1aeded2f55f04fafb07b01e12142fd20c2a3d288.tar.gz lwn-1aeded2f55f04fafb07b01e12142fd20c2a3d288.zip | |
platform/wmi: Extend wmidev_query_block() to reject undersized data
WMI drivers using the buffer-based WMI API are expected to reject
undersized query results. Extend wmidev_query_block() to enable
the WMI driver core to perform this size check internally.
Signed-off-by: Armin Wolf <W_Armin@gmx.de>
Link: https://patch.msgid.link/20260406203237.2970-6-W_Armin@gmx.de
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Diffstat (limited to 'drivers/platform/x86/intel')
| -rw-r--r-- | drivers/platform/x86/intel/wmi/sbl-fw-update.c | 7 |
1 files changed, 1 insertions, 6 deletions
diff --git a/drivers/platform/x86/intel/wmi/sbl-fw-update.c b/drivers/platform/x86/intel/wmi/sbl-fw-update.c index 3716ccaaed6a..62c9c7f1842b 100644 --- a/drivers/platform/x86/intel/wmi/sbl-fw-update.c +++ b/drivers/platform/x86/intel/wmi/sbl-fw-update.c @@ -28,15 +28,10 @@ static int get_fwu_request(struct device *dev, u32 *out) __le32 *result; int ret; - ret = wmidev_query_block(to_wmi_device(dev), 0, &buffer); + ret = wmidev_query_block(to_wmi_device(dev), 0, &buffer, sizeof(*result)); if (ret < 0) return ret; - if (buffer.length < sizeof(*result)) { - kfree(buffer.data); - return -ENODATA; - } - result = buffer.data; *out = le32_to_cpu(*result); kfree(result); |