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author | Yu Liao <liaoyu15@huawei.com> | 2022-11-29 09:11:01 +0800 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-12-31 13:32:00 +0100 |
commit | 87426ce3bd57ad414b6e2436434ef8128986a9a5 (patch) | |
tree | 20dbd2e0cd772c398277e79f2c9a141e9cd82b5f /drivers/platform | |
parent | 6613f36a2fa5c69e528bccba8b3d831f759dad2f (diff) | |
download | linux-stable-87426ce3bd57ad414b6e2436434ef8128986a9a5.tar.gz linux-stable-87426ce3bd57ad414b6e2436434ef8128986a9a5.tar.bz2 linux-stable-87426ce3bd57ad414b6e2436434ef8128986a9a5.zip |
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>
Diffstat (limited to 'drivers/platform')
-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; |