[PATCH] arm64: tlb: Flush walk cache when unsharing PMD tables

[Catalin Marinas]

On Thu, 21 May 2026 15:30:11 +0800, Zeng Heng wrote:
> When huge_pmd_unshare() is called to unshare a PMD table, the
> tlb_unshare_pmd_ptdesc() function sets tlb->unshared_tables=true
> but the aarch64 tlb_flush() only checked tlb->freed_tables to
> determine whether to use TLBF_NONE (vae1is, invalidates walk
> cache) or TLBF_NOWALKCACHE (vale1is, leaf-only).
> 
> This caused the stale PMD page table entry to remain in the walk cache
> after unshare, potentially leading to incorrect page table walks.
> 
> [...]

Applied to arm64 (for-next/fixes), thanks!

[1/1] arm64: tlb: Flush walk cache when unsharing PMD tables
      https://git.kernel.org/arm64/c/c2ff4764e03e