On Wed, Jan 08, 2025 at 02:57:25PM +0800, Qi Zheng wrote: > Move pagetable_dtor() to __tlb_remove_table(), so that ptlock and page > table pages can be freed together (regardless of whether RCU is used). > This prevents the use-after-free problem where the ptlock is freed > immediately but the page table pages is freed later via RCU. > > Page tables shouldn't have swap cache, so use pagetable_free() instead of > free_page_and_swap_cache() to free page table pages. > > Signed-off-by: Qi Zheng <zhengqi.arch@xxxxxxxxxxxxx> > Suggested-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx> > Reviewed-by: Kevin Brodsky <kevin.brodsky@xxxxxxx> > Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx > --- > arch/arm64/include/asm/tlb.h | 10 ++++------ > 1 file changed, 4 insertions(+), 6 deletions(-) Acked-by: Will Deacon <will@xxxxxxxxxx> Will
