CVE-2023-53070 ACPI: PPTT: Fix to avoid sleep in the atomic context when PPTT is absent

In the Linux kernel, the following vulnerability has been resolved: ACPI: PPTT: Fix to avoid sleep in the atomic context when PPTT is absent Commit 0c80f9e165f8 "ACPI: PPTT: Leave the table mapped for the runtime usage" enabled to map PPTT once on the first invocation of acpigetpptt and never...

CVE-2023-53070 ACPI: PPTT: Fix to avoid sleep in the atomic context when PPTT is absent

In the Linux kernel, the following vulnerability has been resolved: ACPI: PPTT: Fix to avoid sleep in the atomic context when PPTT is absent Commit 0c80f9e165f8 "ACPI: PPTT: Leave the table mapped for the runtime usage" enabled to map PPTT once on the first invocation of acpigetpptt and never...

CVE-2023-53070

CVE-2023-53070 affects the Linux kernel: when PPTT is absent, multiple CPUs could call acpi_get_pptt() in atomic context, risking a sleep waiting on a mutex and a kernel crash trace. The fix updates acpi_get_pptt() to return NULL if PPTT is not available, avoiding sleeps in atomic context and pre...