CVE-2024-26784

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> pmdomain: arm: Fix NULL dereference on scmi_perf_domain removal<br /> <br /> On unloading of the scmi_perf_domain module got the below splat, when in<br /> the DT provided to the system under test the &amp;#39;#power-domain-cells&amp;#39; property<br /> was missing. Indeed, this particular setup causes the probe to bail out<br /> early without giving any error, which leads to the -&gt;remove() callback gets<br /> to run too, but without all the expected initialized structures in place.<br /> <br /> Add a check and bail out early on remove too.<br /> <br /> Call trace:<br /> scmi_perf_domain_remove+0x28/0x70 [scmi_perf_domain]<br /> scmi_dev_remove+0x28/0x40 [scmi_core]<br /> device_remove+0x54/0x90<br /> device_release_driver_internal+0x1dc/0x240<br /> driver_detach+0x58/0xa8<br /> bus_remove_driver+0x78/0x108<br /> driver_unregister+0x38/0x70<br /> scmi_driver_unregister+0x28/0x180 [scmi_core]<br /> scmi_perf_domain_driver_exit+0x18/0xb78 [scmi_perf_domain]<br /> __arm64_sys_delete_module+0x1a8/0x2c0<br /> invoke_syscall+0x50/0x128<br /> el0_svc_common.constprop.0+0x48/0xf0<br /> do_el0_svc+0x24/0x38<br /> el0_svc+0x34/0xb8<br /> el0t_64_sync_handler+0x100/0x130<br /> el0t_64_sync+0x190/0x198<br /> Code: a90153f3 f9403c14 f9414800 955f8a05 (b9400a80)<br /> ---[ end trace 0000000000000000 ]---