powerpc/32: Fix hardlockup on vmap stack overflow
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ssvc Trackepss 0.2%
probabilidade de exploração
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exploração observada
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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.
Produtos afetados
Linux · Linux