In the Linux kernel, the following vulnerability has been resolved: drivers/perf: hisi: use cpuhpstateremoveinstancenocalls() for hisihns3pmu uninit process When tearing down a 'hisihns3' PMU, we mistakenly run the CPU hotplug callbacks after the device has been unregistered, leading to fireworks when we try to execute empty function callbacks within the driver: | Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000 | CPU: 0 PID: 15 Comm: cpuhp/0 Tainted: G W O 5.12.0-rc4+ #1 | Hardware name: , BIOS KpxxxFPGA 1P B600 V143 04/22/2021 | pstate: 80400009 (Nzcv daif +PAN -UAO -TCO BTYPE=--) | pc : perfpmumigratecontext+0x98/0x38c | lr : perfpmumigratecontext+0x94/0x38c | | Call trace: | perfpmumigratecontext+0x98/0x38c | hisihns3pmuofflinecpu+0x104/0x12c [hisihns3pmu] Use cpuhpstateremoveinstancenocalls() instead of cpuhpstateremove_instance() so that the notifiers don't execute after the PMU device has been unregistered. [will: Rewrote commit message]
{ "binaries": [ { "binary_version": "6.5.0-1014.14", "binary_name": "linux-buildinfo-6.5.0-1014-nvidia" }, { "binary_version": "6.5.0-1014.14", "binary_name": "linux-buildinfo-6.5.0-1014-nvidia-64k" }, { "binary_version": "6.5.0-1014.14", "binary_name": "linux-headers-6.5.0-1014-nvidia" }, { "binary_version": "6.5.0-1014.14", "binary_name": "linux-headers-6.5.0-1014-nvidia-64k" }, { "binary_version": "6.5.0-1014.14", "binary_name": "linux-image-unsigned-6.5.0-1014-nvidia" }, { "binary_version": "6.5.0-1014.14", "binary_name": "linux-image-unsigned-6.5.0-1014-nvidia-64k" }, { "binary_version": "6.5.0-1014.14", "binary_name": "linux-image-unsigned-6.5.0-1014-nvidia-64k-dbgsym" }, { "binary_version": "6.5.0-1014.14", "binary_name": "linux-image-unsigned-6.5.0-1014-nvidia-dbgsym" }, { "binary_version": "6.5.0-1014.14", "binary_name": "linux-modules-6.5.0-1014-nvidia" }, { "binary_version": "6.5.0-1014.14", "binary_name": "linux-modules-6.5.0-1014-nvidia-64k" }, { "binary_version": "6.5.0-1014.14", "binary_name": "linux-modules-extra-6.5.0-1014-nvidia" }, { "binary_version": "6.5.0-1014.14", "binary_name": "linux-modules-nvidia-fs-6.5.0-1014-nvidia" }, { "binary_version": "6.5.0-1014.14", "binary_name": "linux-modules-nvidia-fs-6.5.0-1014-nvidia-64k" }, { "binary_version": "6.5.0-1014.14", "binary_name": "linux-nvidia-6.5-headers-6.5.0-1014" }, { "binary_version": "6.5.0-1014.14", "binary_name": "linux-nvidia-6.5-tools-6.5.0-1014" }, { "binary_version": "6.5.0-1014.14", "binary_name": "linux-nvidia-6.5-tools-host" }, { "binary_version": "6.5.0-1014.14", "binary_name": "linux-tools-6.5.0-1014-nvidia" }, { "binary_version": "6.5.0-1014.14", "binary_name": "linux-tools-6.5.0-1014-nvidia-64k" } ], "availability": "No subscription required" }