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platform/x86/amd: Fix memory leak in wbrf_record()

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The tmp buffer is allocated using kcalloc() but is not freed if
acpi_evaluate_dsm() fails. This causes a memory leak in the error path.

Fix this by explicitly freeing the tmp buffer in the error handling
path of acpi_evaluate_dsm().

Fixes: 58e82a6266 ("platform/x86/amd: Add support for AMD ACPI based Wifi band RFI mitigation feature")
Suggested-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Co-developed-by: Jianhao Xu <jianhao.xu@seu.edu.cn>
Signed-off-by: Jianhao Xu <jianhao.xu@seu.edu.cn>
Signed-off-by: Zilin Guan <zilin@seu.edu.cn>
Link: https://patch.msgid.link/20260106091318.747019-1-zilin@seu.edu.cn
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
This commit is contained in:
Zilin Guan
2026-01-06 09:13:17 +00:00
committed by Ilpo Järvinen
parent 3113bcf4cc
commit 2bf1877b70
1 changed files with 3 additions and 1 deletions
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drivers/platform/x86/amd/wbrf.c
+3 -1
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@@ -104,8 +104,10 @@ static int wbrf_record(struct acpi_device *adev, uint8_t action, struct wbrf_ran
obj = acpi_evaluate_dsm(adev->handle, &wifi_acpi_dsm_guid,
WBRF_REVISION, WBRF_RECORD, &argv4);
if (!obj)
if (!obj) {
kfree(tmp);
return -EINVAL;
}
if (obj->type != ACPI_TYPE_INTEGER) {
ret = -EINVAL;