In the Linux kernel, the following vulnerability has been resolved: powerpc/32: Fix hardlockup on vmap stack overflow Since the commit c118c7303ad5 ("powerpc/32: Fix vmap stack - Do not activate MMU before reading task struct") a vmap stack overflow results in a hard lockup. This is because emergency_ctx is still addressed with its virtual address allthough data MMU is not active anymore at that time. Fix it by using a physical address instead.
| Product | Vendor | Version |
|---|---|---|
| Linux | Linux | 2019 |
| Linux | Linux | 2019 (Core installation) |
| Linux | Linux | 10 Version 1809 for x64-based Systems |
| Linux | Linux | 2008 R2 for x64-based Systems Service Pack 1 |