On Mon, 03 Jul 2023 12:00:44 -0700, John Hubbard wrote:
> The WARN_ON_ONCE() statement in riscv's huge_pte_alloc() is susceptible
> to false positives, because the pte is read twice at the C language
> level, locklessly, within the same conditional statement. Depending on
> compiler behavior, this can lead to generated machine code that actually
> reads the pte just once, or twice. Reading twice will expose the code to
> changing pte values and cause incorrect behavior.
>
> [...]
Applied, thanks!
[1/1] mm: riscv: fix an unsafe pte read in huge_pte_alloc()
https://git.kernel.org/palmer/c/62ba41d27612
Best regards,
--
Palmer Dabbelt <palmer@xxxxxxxxxxxx>
