Zhenyu Ye a11a457820 arm64: tlb: fix the TTL value of tlb_get_level ... commit 52218fcd61cb42bde0d301db4acb3ffdf3463cc7 upstream. The TTL field indicates the level of page table walk holding the *leaf* entry for the address being invalidated. But currently, the TTL field may be set to an incorrent value in the following stack: pte_free_tlb __pte_free_tlb tlb_remove_table tlb_table_invalidate tlb_flush_mmu_tlbonly tlb_flush In this case, we just want to flush a PTE page, but the tlb->cleared_pmds is set and we get tlb_level = 2 in the tlb_get_level() function. This may cause some unexpected problems. This patch set the TTL field to 0 if tlb->freed_tables is set. The tlb->freed_tables indicates page table pages are freed, not the leaf entry. Cc: <stable@vger.kernel.org> # 5.9.x Fixes: c4ab2cbc1d ("arm64: tlb: Set the TTL field in flush_tlb_range") Acked-by: Catalin Marinas <catalin.marinas@arm.com> Reported-by: ZhuRui <zhurui3@huawei.com> Signed-off-by: Zhenyu Ye <yezhenyu2@huawei.com> Link: https://lore.kernel.org/r/b80ead47-1f88-3a00-18e1-cacc22f54cc4@huawei.com Signed-off-by: Will Deacon <will@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2021-07-19 09:44:59 +02:00
..
boot	arm64: dts: rockchip: Enable USB3 for rk3328 Rock64	2021-07-19 09:44:55 +02:00
configs	arm64: defconfig: Build in CONFIG_GPIO_MXC by default	2020-10-26 15:48:58 +08:00
crypto	crypto: poly1305 - fix poly1305_core_setkey() declaration	2021-05-14 09:50:13 +02:00
include	arm64: tlb: fix the TTL value of tlb_get_level	2021-07-19 09:44:59 +02:00
kernel	arm64/mm: Fix ttbr0 values stored in struct thread_info for software-pan	2021-07-14 16:56:07 +02:00
kvm	KVM: arm64: Don't zero the cycle count register when PMCR_EL0.P is set	2021-07-14 16:56:08 +02:00
lib	arm64: Change .weak to SYM_FUNC_START_WEAK_PI for arch/arm64/lib/mem*.S	2020-10-30 08:32:31 +00:00
mm	arm64: consistently use reserved_pg_dir	2021-07-14 16:56:06 +02:00
net
xen
Kbuild
Kconfig	arm64: mte: Ensure TIF_MTE_ASYNC_FAULT is set atomically	2021-04-21 13:01:00 +02:00
Kconfig.debug
Kconfig.platforms	arm64: berlin: Select DW_APB_TIMER_OF	2020-10-26 10:45:03 +01:00
Makefile	arm64: link with -z norelro for LLD or aarch64-elf	2021-01-12 20:18:24 +01:00