ghsa-2phg-f479-57pq
Vulnerability from github
In the Linux kernel, the following vulnerability has been resolved:
platform/x86/amd/pmc: Only disable IRQ1 wakeup where i8042 actually enabled it
Wakeup for IRQ1 should be disabled only in cases where i8042 had actually enabled it, otherwise "wake_depth" for this IRQ will try to drop below zero and there will be an unpleasant WARN() logged:
kernel: atkbd serio0: Disabling IRQ1 wakeup source to avoid platform firmware bug kernel: ------------[ cut here ]------------ kernel: Unbalanced IRQ 1 wake disable kernel: WARNING: CPU: 10 PID: 6431 at kernel/irq/manage.c:920 irq_set_irq_wake+0x147/0x1a0
The PMC driver uses DEFINE_SIMPLE_DEV_PM_OPS() to define its dev_pm_ops which sets amd_pmc_suspend_handler() to the .suspend, .freeze, and .poweroff handlers. i8042_pm_suspend(), however, is only set as the .suspend handler.
Fix the issue by call PMC suspend handler only from the same set of dev_pm_ops handlers as i8042_pm_suspend(), which currently means just the .suspend handler.
To reproduce this issue try hibernating (S4) the machine after a fresh boot without putting it into s2idle first.
[ij: edited the commit message.]
{
"affected": [],
"aliases": [
"CVE-2025-21645"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-01-19T11:15:10Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nplatform/x86/amd/pmc: Only disable IRQ1 wakeup where i8042 actually enabled it\n\nWakeup for IRQ1 should be disabled only in cases where i8042 had\nactually enabled it, otherwise \"wake_depth\" for this IRQ will try to\ndrop below zero and there will be an unpleasant WARN() logged:\n\nkernel: atkbd serio0: Disabling IRQ1 wakeup source to avoid platform firmware bug\nkernel: ------------[ cut here ]------------\nkernel: Unbalanced IRQ 1 wake disable\nkernel: WARNING: CPU: 10 PID: 6431 at kernel/irq/manage.c:920 irq_set_irq_wake+0x147/0x1a0\n\nThe PMC driver uses DEFINE_SIMPLE_DEV_PM_OPS() to define its dev_pm_ops\nwhich sets amd_pmc_suspend_handler() to the .suspend, .freeze, and\n.poweroff handlers. i8042_pm_suspend(), however, is only set as\nthe .suspend handler.\n\nFix the issue by call PMC suspend handler only from the same set of\ndev_pm_ops handlers as i8042_pm_suspend(), which currently means just\nthe .suspend handler.\n\nTo reproduce this issue try hibernating (S4) the machine after a fresh boot\nwithout putting it into s2idle first.\n\n[ij: edited the commit message.]",
"id": "GHSA-2phg-f479-57pq",
"modified": "2025-01-19T12:31:25Z",
"published": "2025-01-19T12:31:25Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-21645"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/5cc621085e2b7a9b1905a98f8e5a86bb4aea2016"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b25778c87a6bce40c31e92364f08aa6240309e25"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/dd410d784402c5775f66faf8b624e85e41c38aaf"
}
],
"schema_version": "1.4.0",
"severity": []
}
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