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platform/x86: dell-smbios-wmi: Add missing kfree in error-exit from run_smbios_call
[ Upstream commit0487d4fc42
] As pointed out be Kees Cook if we return -EIO because the obj->type != ACPI_TYPE_BUFFER, then we must kfree the output buffer before the return. Fixes:1a258e6704
("platform/x86: dell-smbios-wmi: Add new WMI dispatcher driver") Reported-by: Kees Cook <keescook@chromium.org> Signed-off-by: Hans de Goede <hdegoede@redhat.com> Link: https://lore.kernel.org/r/20210826140822.71198-1-hdegoede@redhat.com Signed-off-by: Sasha Levin <sashal@kernel.org>
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@ -69,6 +69,7 @@ static int run_smbios_call(struct wmi_device *wdev)
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if (obj->type == ACPI_TYPE_INTEGER)
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dev_dbg(&wdev->dev, "SMBIOS call failed: %llu\n",
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obj->integer.value);
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kfree(output.pointer);
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return -EIO;
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}
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memcpy(&priv->buf->std, obj->buffer.pointer, obj->buffer.length);
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