CVE-2024-57985

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> firmware: qcom: scm: Cleanup global &amp;#39;__scm&amp;#39; on probe failures<br /> <br /> If SCM driver fails the probe, it should not leave global &amp;#39;__scm&amp;#39;<br /> variable assigned, because external users of this driver will assume the<br /> probe finished successfully. For example TZMEM parts (&amp;#39;__scm-&gt;mempool&amp;#39;)<br /> are initialized later in the probe, but users of it (__scm_smc_call())<br /> rely on the &amp;#39;__scm&amp;#39; variable.<br /> <br /> This fixes theoretical NULL pointer exception, triggered via introducing<br /> probe deferral in SCM driver with call trace:<br /> <br /> qcom_tzmem_alloc+0x70/0x1ac (P)<br /> qcom_tzmem_alloc+0x64/0x1ac (L)<br /> qcom_scm_assign_mem+0x78/0x194<br /> qcom_rmtfs_mem_probe+0x2d4/0x38c<br /> platform_probe+0x68/0xc8