In the Linux kernel, the following vulnerability has been resolved:
drivers/perf: hisi: use cpuhp_state_remove_instance_nocalls() for hisi_hns3_pmu uninit process
When tearing down a ‘hisi_hns3’ 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 : perf_pmu_migrate_context+0x98/0x38c
| lr : perf_pmu_migrate_context+0x94/0x38c
|
| Call trace:
| perf_pmu_migrate_context+0x98/0x38c
| hisi_hns3_pmu_offline_cpu+0x104/0x12c [hisi_hns3_pmu]
Use cpuhp_state_remove_instance_nocalls() instead of
cpuhp_state_remove_instance() so that the notifiers don’t execute after
the PMU device has been unregistered.
[will: Rewrote commit message]
[
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"drivers/perf/hisilicon/hns3_pmu.c"
],
"versions": [
{
"version": "66637ab137b4",
"lessThan": "4589403a343b",
"status": "affected",
"versionType": "git"
},
{
"version": "66637ab137b4",
"lessThan": "3f5827371763",
"status": "affected",
"versionType": "git"
},
{
"version": "66637ab137b4",
"lessThan": "d04ff5437a45",
"status": "affected",
"versionType": "git"
},
{
"version": "66637ab137b4",
"lessThan": "50b560783f7f",
"status": "affected",
"versionType": "git"
}
]
},
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "affected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"drivers/perf/hisilicon/hns3_pmu.c"
],
"versions": [
{
"version": "6.0",
"status": "affected"
},
{
"version": "0",
"lessThan": "6.0",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "6.1.63",
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "6.5.12",
"lessThanOrEqual": "6.5.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "6.6.2",
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "6.7",
"lessThanOrEqual": "*",
"status": "unaffected",
"versionType": "original_commit_for_fix"
}
]
}
]