CVE-2024-44968
Description
In the Linux kernel, the following vulnerability has been resolved: tick/broadcast: Move per CPU pointer access into the atomic section The recent fix for making the take over of the broadcast timer more reliable retrieves a per CPU pointer in preemptible context. This went unnoticed as compilers hoist the access into the non-preemptible region where the pointer is actually used. But of course it's valid that the compiler keeps it at the place where the code puts it which rightfully triggers: BUG: using smp_processor_id() in preemptible [00000000] code: caller is hotplug_cpu__broadcast_tick_pull+0x1c/0xc0 Move it to the actual usage site which is in a non-preemptible region.
How to fix
- linux linux_kernel6.1.105, 6.6.46, 6.10.5 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 6.1.103 ≤ v < 6.1.105, 6.6.44 ≤ v < 6.6.46, 6.10.3 ≤ v < 6.10.5, 6.11 | 6.1.105, 6.6.46, 6.10.5 |
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