diff options
| author | Yu Liao <liaoyu15@huawei.com> | 2022-11-29 04:11:01 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-12-31 15:25:47 +0300 |
| commit | 379e7794c5e7485193d25d73614fbbd1e1387f6f (patch) | |
| tree | c716aab5936ab5582a6e3c108b7b4d361d1eb309 | |
| parent | b610758bb3e0674644c1255cdafc2f46b7e05ff9 (diff) | |
| download | linux-379e7794c5e7485193d25d73614fbbd1e1387f6f.tar.xz | |
platform/x86: mxm-wmi: fix memleak in mxm_wmi_call_mx[ds|mx]()
[ Upstream commit 727cc0147f5066e359aca65cc6cc5e6d64cc15d8 ]
The ACPI buffer memory (out.pointer) returned by wmi_evaluate_method()
is not freed after the call, so it leads to memory leak.
The method results in ACPI buffer is not used, so just pass NULL to
wmi_evaluate_method() which fixes the memory leak.
Fixes: 99b38b4acc0d ("platform/x86: add MXM WMI driver.")
Signed-off-by: Yu Liao <liaoyu15@huawei.com>
Link: https://lore.kernel.org/r/20221129011101.2042315-1-liaoyu15@huawei.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/platform/x86/mxm-wmi.c | 8 |
1 files changed, 2 insertions, 6 deletions
diff --git a/drivers/platform/x86/mxm-wmi.c b/drivers/platform/x86/mxm-wmi.c index 9a19fbd2f734..9a457956025a 100644 --- a/drivers/platform/x86/mxm-wmi.c +++ b/drivers/platform/x86/mxm-wmi.c @@ -35,13 +35,11 @@ int mxm_wmi_call_mxds(int adapter) .xarg = 1, }; struct acpi_buffer input = { (acpi_size)sizeof(args), &args }; - struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL }; acpi_status status; printk("calling mux switch %d\n", adapter); - status = wmi_evaluate_method(MXM_WMMX_GUID, 0x0, adapter, &input, - &output); + status = wmi_evaluate_method(MXM_WMMX_GUID, 0x0, adapter, &input, NULL); if (ACPI_FAILURE(status)) return status; @@ -60,13 +58,11 @@ int mxm_wmi_call_mxmx(int adapter) .xarg = 1, }; struct acpi_buffer input = { (acpi_size)sizeof(args), &args }; - struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL }; acpi_status status; printk("calling mux switch %d\n", adapter); - status = wmi_evaluate_method(MXM_WMMX_GUID, 0x0, adapter, &input, - &output); + status = wmi_evaluate_method(MXM_WMMX_GUID, 0x0, adapter, &input, NULL); if (ACPI_FAILURE(status)) return status; |