From: Andrew Morton <akpm@linux-foundation.org>
To: akpm@linux-foundation.org, bp@alien8.de, catalin.marinas@arm.com,
hpa@zytor.com, linux-mm@kvack.org, mingo@redhat.com,
mm-commits@vger.kernel.org, palmer@dabbelt.com,
paul.walmsley@sifive.com, tglx@linutronix.de,
torvalds@linux-foundation.org, will@kernel.org,
zong.li@sifive.com
Subject: [patch 131/131] arm64: mm: use ARCH_HAS_DEBUG_WX instead of arch defined
Date: Wed, 03 Jun 2020 16:04:02 -0700 [thread overview]
Message-ID: <20200603230402.XCluSVOgm%akpm@linux-foundation.org> (raw)
In-Reply-To: <20200603155549.e041363450869eaae4c7f05b@linux-foundation.org>
From: Zong Li <zong.li@sifive.com>
Subject: arm64: mm: use ARCH_HAS_DEBUG_WX instead of arch defined
Extract DEBUG_WX to mm/Kconfig.debug for shared use. Change to use
ARCH_HAS_DEBUG_WX instead of DEBUG_WX defined by arch port.
Link: http://lkml.kernel.org/r/e19709e7576f65e303245fe520cad5f7bae72763.1587455584.git.zong.li@sifive.com
Signed-off-by: Zong Li <zong.li@sifive.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
arch/arm64/Kconfig | 1 +
arch/arm64/Kconfig.debug | 29 -----------------------------
2 files changed, 1 insertion(+), 29 deletions(-)
--- a/arch/arm64/Kconfig~arm64-mm-use-arch_has_debug_wx-instead-of-arch-defined
+++ a/arch/arm64/Kconfig
@@ -9,6 +9,7 @@ config ARM64
select ACPI_MCFG if (ACPI && PCI)
select ACPI_SPCR_TABLE if ACPI
select ACPI_PPTT if ACPI
+ select ARCH_HAS_DEBUG_WX
select ARCH_BINFMT_ELF_STATE
select ARCH_HAS_DEBUG_VIRTUAL
select ARCH_HAS_DEVMEM_IS_ALLOWED
--- a/arch/arm64/Kconfig.debug~arm64-mm-use-arch_has_debug_wx-instead-of-arch-defined
+++ a/arch/arm64/Kconfig.debug
@@ -23,35 +23,6 @@ config ARM64_RANDOMIZE_TEXT_OFFSET
of TEXT_OFFSET and platforms must not require a specific
value.
-config DEBUG_WX
- bool "Warn on W+X mappings at boot"
- select PTDUMP_CORE
- ---help---
- Generate a warning if any W+X mappings are found at boot.
-
- This is useful for discovering cases where the kernel is leaving
- W+X mappings after applying NX, as such mappings are a security risk.
- This check also includes UXN, which should be set on all kernel
- mappings.
-
- Look for a message in dmesg output like this:
-
- arm64/mm: Checked W+X mappings: passed, no W+X pages found.
-
- or like this, if the check failed:
-
- arm64/mm: Checked W+X mappings: FAILED, <N> W+X pages found.
-
- Note that even if the check fails, your kernel is possibly
- still fine, as W+X mappings are not a security hole in
- themselves, what they do is that they make the exploitation
- of other unfixed kernel bugs easier.
-
- There is no runtime or memory usage effect of this option
- once the kernel has booted up - it's a one time check.
-
- If in doubt, say "Y".
next prev parent reply other threads:[~2020-06-03 23:08 UTC|newest]
Thread overview: 138+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-03 22:55 incoming Andrew Morton
2020-06-03 22:56 ` [patch 001/131] mm/slub: fix a memory leak in sysfs_slab_add() Andrew Morton
2020-06-03 22:56 ` [patch 002/131] mm/memcg: optimize memory.numa_stat like memory.stat Andrew Morton
2020-06-03 22:56 ` [patch 003/131] mm/gup: move __get_user_pages_fast() down a few lines in gup.c Andrew Morton
2020-06-03 22:56 ` [patch 004/131] mm/gup: refactor and de-duplicate gup_fast() code Andrew Morton
2020-06-03 22:56 ` [patch 005/131] mm/gup: introduce pin_user_pages_fast_only() Andrew Morton
2020-06-03 22:56 ` [patch 006/131] drm/i915: convert get_user_pages() --> pin_user_pages() Andrew Morton
2020-06-03 22:56 ` [patch 007/131] mm/gup: might_lock_read(mmap_sem) in get_user_pages_fast() Andrew Morton
2020-06-03 22:56 ` [patch 008/131] kasan: stop tests being eliminated as dead code with FORTIFY_SOURCE Andrew Morton
2020-06-03 22:56 ` [patch 009/131] string.h: fix incompatibility between FORTIFY_SOURCE and KASAN Andrew Morton
2020-06-03 22:56 ` [patch 010/131] mm: clarify __GFP_MEMALLOC usage Andrew Morton
2020-06-03 22:56 ` [patch 011/131] mm: memblock: replace dereferences of memblock_region.nid with API calls Andrew Morton
2020-06-03 22:56 ` [patch 012/131] mm: make early_pfn_to_nid() and related defintions close to each other Andrew Morton
2020-06-03 22:57 ` [patch 013/131] mm: remove CONFIG_HAVE_MEMBLOCK_NODE_MAP option Andrew Morton
2020-06-03 22:57 ` [patch 014/131] mm: free_area_init: use maximal zone PFNs rather than zone sizes Andrew Morton
2020-06-03 22:57 ` [patch 015/131] mm: use free_area_init() instead of free_area_init_nodes() Andrew Morton
2020-06-03 22:57 ` [patch 016/131] alpha: simplify detection of memory zone boundaries Andrew Morton
2020-06-03 22:57 ` [patch 017/131] arm: " Andrew Morton
2020-06-03 22:57 ` [patch 018/131] arm64: simplify detection of memory zone boundaries for UMA configs Andrew Morton
2020-06-03 22:57 ` [patch 019/131] csky: simplify detection of memory zone boundaries Andrew Morton
2020-06-03 22:57 ` [patch 020/131] m68k: mm: " Andrew Morton
2020-06-03 22:57 ` [patch 021/131] parisc: " Andrew Morton
2020-06-03 22:57 ` [patch 022/131] sparc32: " Andrew Morton
2020-06-03 22:57 ` [patch 023/131] unicore32: " Andrew Morton
2020-06-03 22:57 ` [patch 024/131] xtensa: " Andrew Morton
2020-06-03 22:57 ` [patch 025/131] mm: memmap_init: iterate over memblock regions rather that check each PFN Andrew Morton
2020-06-03 22:57 ` [patch 026/131] mm: remove early_pfn_in_nid() and CONFIG_NODES_SPAN_OTHER_NODES Andrew Morton
2020-06-03 22:58 ` [patch 027/131] mm: free_area_init: allow defining max_zone_pfn in descending order Andrew Morton
2020-06-03 22:58 ` [patch 028/131] mm: rename free_area_init_node() to free_area_init_memoryless_node() Andrew Morton
2020-06-03 22:58 ` [patch 029/131] mm: clean up free_area_init_node() and its helpers Andrew Morton
2020-06-03 22:58 ` [patch 030/131] mm: simplify find_min_pfn_with_active_regions() Andrew Morton
2020-06-03 22:58 ` [patch 031/131] docs/vm: update memory-models documentation Andrew Morton
2020-06-03 22:58 ` [patch 032/131] mm/page_alloc.c: bad_[reason|flags] is not necessary when PageHWPoison Andrew Morton
2020-06-03 22:58 ` [patch 033/131] mm/page_alloc.c: bad_flags is not necessary for bad_page() Andrew Morton
2020-06-03 22:58 ` [patch 034/131] mm/page_alloc.c: rename free_pages_check_bad() to check_free_page_bad() Andrew Morton
2020-06-03 22:58 ` [patch 035/131] mm/page_alloc.c: rename free_pages_check() to check_free_page() Andrew Morton
2020-06-03 22:58 ` [patch 036/131] mm/page_alloc.c: extract check_[new|free]_page_bad() common part to page_bad_reason() Andrew Morton
2020-06-03 22:58 ` [patch 037/131] mm,page_alloc,cma: conditionally prefer cma pageblocks for movable allocations Andrew Morton
2020-06-03 22:58 ` [patch 038/131] mm/page_alloc.c: remove unused free_bootmem_with_active_regions Andrew Morton
2020-06-03 22:58 ` [patch 039/131] mm/page_alloc.c: only tune sysctl_lowmem_reserve_ratio value once when changing it Andrew Morton
2020-06-03 22:58 ` [patch 040/131] mm/page_alloc.c: clear out zone->lowmem_reserve[] if the zone is empty Andrew Morton
2020-06-03 22:58 ` [patch 041/131] mm/vmstat.c: do not show lowmem reserve protection information of empty zone Andrew Morton
2020-06-03 22:58 ` [patch 042/131] mm/page_alloc: use ac->high_zoneidx for classzone_idx Andrew Morton
2020-06-03 22:59 ` [patch 043/131] mm/page_alloc: integrate classzone_idx and high_zoneidx Andrew Morton
2020-06-03 22:59 ` [patch 044/131] mm/page_alloc.c: use NODE_MASK_NONE in build_zonelists() Andrew Morton
2020-06-03 22:59 ` [patch 045/131] mm: rename gfpflags_to_migratetype to gfp_migratetype for same convention Andrew Morton
2020-06-03 22:59 ` [patch 046/131] mm/page_alloc.c: reset numa stats for boot pagesets Andrew Morton
2020-06-03 22:59 ` [patch 047/131] mm, page_alloc: reset the zone->watermark_boost early Andrew Morton
2020-06-03 22:59 ` [patch 048/131] mm/page_alloc: restrict and formalize compound_page_dtors[] Andrew Morton
2020-06-03 22:59 ` [patch 049/131] mm/pagealloc.c: call touch_nmi_watchdog() on max order boundaries in deferred init Andrew Morton
2020-06-03 22:59 ` [patch 050/131] mm: initialize deferred pages with interrupts enabled Andrew Morton
2020-06-03 22:59 ` [patch 051/131] mm: call cond_resched() from deferred_init_memmap() Andrew Morton
2020-06-03 22:59 ` [patch 052/131] padata: remove exit routine Andrew Morton
2020-06-03 22:59 ` [patch 053/131] padata: initialize earlier Andrew Morton
2020-06-03 22:59 ` [patch 054/131] padata: allocate work structures for parallel jobs from a pool Andrew Morton
2020-06-03 22:59 ` [patch 055/131] padata: add basic support for multithreaded jobs Andrew Morton
2020-06-03 22:59 ` [patch 056/131] mm: don't track number of pages during deferred initialization Andrew Morton
2020-06-03 22:59 ` [patch 057/131] mm: parallelize deferred_init_memmap() Andrew Morton
2020-06-03 22:59 ` [patch 058/131] mm: make deferred init's max threads arch-specific Andrew Morton
2020-06-03 22:59 ` [patch 059/131] padata: document multithreaded jobs Andrew Morton
2020-06-03 23:00 ` [patch 060/131] mm/page_alloc.c: add missing newline Andrew Morton
2020-06-03 23:00 ` [patch 061/131] khugepaged: add self test Andrew Morton
2020-06-03 23:00 ` [patch 062/131] khugepaged: do not stop collapse if less than half PTEs are referenced Andrew Morton
2020-06-03 23:00 ` [patch 063/131] khugepaged: drain all LRU caches before scanning pages Andrew Morton
2020-06-03 23:00 ` [patch 064/131] khugepaged: drain LRU add pagevec after swapin Andrew Morton
2020-06-03 23:00 ` [patch 065/131] khugepaged: allow to collapse a page shared across fork Andrew Morton
2020-06-03 23:00 ` [patch 066/131] khugepaged: allow to collapse PTE-mapped compound pages Andrew Morton
2020-06-03 23:00 ` [patch 067/131] thp: change CoW semantics for anon-THP Andrew Morton
2020-06-03 23:00 ` [patch 068/131] khugepaged: introduce 'max_ptes_shared' tunable Andrew Morton
2020-06-03 23:00 ` [patch 069/131] hugetlbfs: add arch_hugetlb_valid_size Andrew Morton
2020-06-03 23:00 ` [patch 070/131] hugetlbfs: move hugepagesz= parsing to arch independent code Andrew Morton
2020-06-03 23:00 ` [patch 071/131] hugetlbfs: remove hugetlb_add_hstate() warning for existing hstate Andrew Morton
2020-06-03 23:00 ` [patch 072/131] hugetlbfs: clean up command line processing Andrew Morton
2020-06-03 23:00 ` [patch 073/131] hugetlbfs: fix changes to " Andrew Morton
2020-06-03 23:00 ` [patch 074/131] mm/hugetlb: avoid unnecessary check on pud and pmd entry in huge_pte_offset Andrew Morton
2020-06-03 23:00 ` [patch 075/131] arm64/mm: drop __HAVE_ARCH_HUGE_PTEP_GET Andrew Morton
2020-06-03 23:01 ` [patch 076/131] mm/hugetlb: define a generic fallback for is_hugepage_only_range() Andrew Morton
2020-06-03 23:01 ` [patch 077/131] mm/hugetlb: define a generic fallback for arch_clear_hugepage_flags() Andrew Morton
2020-06-03 23:01 ` [patch 078/131] mm: simplify calling a compound page destructor Andrew Morton
2020-06-03 23:01 ` [patch 079/131] mm/vmscan.c: use update_lru_size() in update_lru_sizes() Andrew Morton
2020-06-03 23:01 ` [patch 080/131] mm/vmscan: count layzfree pages and fix nr_isolated_* mismatch Andrew Morton
2020-06-03 23:01 ` [patch 081/131] mm/vmscan.c: change prototype for shrink_page_list Andrew Morton
2020-06-03 23:01 ` [patch 082/131] mm/vmscan: update the comment of should_continue_reclaim() Andrew Morton
2020-06-03 23:01 ` [patch 083/131] mm: fix NUMA node file count error in replace_page_cache() Andrew Morton
2020-06-03 23:01 ` [patch 084/131] mm: memcontrol: fix stat-corrupting race in charge moving Andrew Morton
2020-06-03 23:01 ` [patch 085/131] mm: memcontrol: drop @compound parameter from memcg charging API Andrew Morton
2020-06-03 23:01 ` [patch 086/131] mm: shmem: remove rare optimization when swapin races with hole punching Andrew Morton
2020-06-03 23:01 ` [patch 087/131] mm: memcontrol: move out cgroup swaprate throttling Andrew Morton
2020-06-03 23:01 ` [patch 088/131] mm: memcontrol: convert page cache to a new mem_cgroup_charge() API Andrew Morton
2020-06-03 23:01 ` [patch 089/131] mm: memcontrol: prepare uncharging for removal of private page type counters Andrew Morton
2020-06-03 23:01 ` [patch 090/131] mm: memcontrol: prepare move_account " Andrew Morton
2020-06-03 23:01 ` [patch 091/131] mm: memcontrol: prepare cgroup vmstat infrastructure for native anon counters Andrew Morton
2020-06-03 23:01 ` [patch 092/131] mm: memcontrol: switch to native NR_FILE_PAGES and NR_SHMEM counters Andrew Morton
2020-06-03 23:01 ` [patch 093/131] mm: memcontrol: switch to native NR_ANON_MAPPED counter Andrew Morton
2020-06-03 23:02 ` [patch 094/131] mm: memcontrol: switch to native NR_ANON_THPS counter Andrew Morton
2020-06-03 23:02 ` [patch 095/131] mm: memcontrol: convert anon and file-thp to new mem_cgroup_charge() API Andrew Morton
2020-06-03 23:02 ` [patch 096/131] mm: memcontrol: drop unused try/commit/cancel charge API Andrew Morton
2020-06-03 23:02 ` [patch 097/131] mm: memcontrol: prepare swap controller setup for integration Andrew Morton
2020-06-03 23:02 ` [patch 098/131] mm: memcontrol: make swap tracking an integral part of memory control Andrew Morton
2020-06-03 23:02 ` [patch 099/131] mm: memcontrol: charge swapin pages on instantiation Andrew Morton
2020-06-03 23:02 ` [patch 100/131] mm: memcontrol: document the new swap control behavior Andrew Morton
2020-06-03 23:02 ` [patch 101/131] mm: memcontrol: delete unused lrucare handling Andrew Morton
2020-06-03 23:02 ` [patch 102/131] mm: memcontrol: update page->mem_cgroup stability rules Andrew Morton
2020-06-03 23:02 ` [patch 103/131] mm: fix LRU balancing effect of new transparent huge pages Andrew Morton
2020-06-03 23:02 ` [patch 104/131] mm: keep separate anon and file statistics on page reclaim activity Andrew Morton
2020-06-03 23:02 ` [patch 105/131] mm: allow swappiness that prefers reclaiming anon over the file workingset Andrew Morton
2020-06-03 23:02 ` [patch 106/131] mm: fold and remove lru_cache_add_anon() and lru_cache_add_file() Andrew Morton
2020-06-03 23:02 ` [patch 107/131] mm: workingset: let cache workingset challenge anon Andrew Morton
2020-06-03 23:02 ` [patch 108/131] mm: remove use-once cache bias from LRU balancing Andrew Morton
2020-06-03 23:02 ` [patch 109/131] mm: vmscan: drop unnecessary div0 avoidance rounding in get_scan_count() Andrew Morton
2020-06-03 23:02 ` [patch 110/131] mm: base LRU balancing on an explicit cost model Andrew Morton
2020-06-03 23:02 ` [patch 111/131] mm: deactivations shouldn't bias the LRU balance Andrew Morton
2020-06-03 23:03 ` [patch 112/131] mm: only count actual rotations as LRU reclaim cost Andrew Morton
2020-06-03 23:03 ` [patch 113/131] mm: balance LRU lists based on relative thrashing Andrew Morton
2020-06-03 23:03 ` [patch 114/131] mm: vmscan: determine anon/file pressure balance at the reclaim root Andrew Morton
2020-06-03 23:03 ` [patch 115/131] mm: vmscan: reclaim writepage is IO cost Andrew Morton
2020-06-03 23:03 ` [patch 116/131] mm: vmscan: limit the range of LRU type balancing Andrew Morton
2020-06-03 23:03 ` [patch 117/131] mm: swap: fix vmstats for huge pages Andrew Morton
2020-06-03 23:03 ` [patch 118/131] mm: swap: memcg: fix memcg stats " Andrew Morton
2020-06-03 23:03 ` [patch 119/131] tools/vm/page_owner_sort.c: filter out unneeded line Andrew Morton
2020-06-03 23:03 ` [patch 120/131] mm, mempolicy: fix up gup usage in lookup_node Andrew Morton
2020-06-03 23:03 ` [patch 121/131] include/linux/memblock.h: fix minor typo and unclear comment Andrew Morton
2020-06-03 23:03 ` [patch 122/131] sparc32: register memory occupied by kernel as memblock.memory Andrew Morton
2020-06-03 23:03 ` [patch 123/131] hugetlbfs: get unmapped area below TASK_UNMAPPED_BASE for hugetlbfs Andrew Morton
2020-06-03 23:03 ` [patch 124/131] mm: thp: don't need to drain lru cache when splitting and mlocking THP Andrew Morton
2020-06-03 23:03 ` [patch 125/131] powerpc/mm: drop platform defined pmd_mknotpresent() Andrew Morton
2020-06-03 23:03 ` [patch 126/131] mm/thp: rename pmd_mknotpresent() as pmd_mkinvalid() Andrew Morton
2020-06-03 23:03 ` [patch 127/131] drivers/base/memory.c: cache memory blocks in xarray to accelerate lookup Andrew Morton
2020-06-03 23:03 ` [patch 128/131] mm: add DEBUG_WX support Andrew Morton
2020-06-03 23:03 ` [patch 129/131] riscv: support DEBUG_WX Andrew Morton
2020-06-03 23:03 ` [patch 130/131] x86: mm: use ARCH_HAS_DEBUG_WX instead of arch defined Andrew Morton
2020-06-03 23:04 ` Andrew Morton [this message]
2020-06-04 0:00 ` + lib-test-get_count_order-long-in-test_bitopsc-fix.patch added to -mm tree Andrew Morton
2020-06-04 0:54 ` mmotm 2020-06-03-17-54 uploaded Andrew Morton
2020-06-04 18:03 ` + mm-vmalloc-fix-a-typo-in-comment.patch added to -mm tree Andrew Morton
2020-06-04 19:59 ` + memory_hotplug-disable-the-functionality-for-32b.patch " Andrew Morton
2020-06-04 21:30 ` + mm-utilc-remove-the-vm_warn_once-for-vm_committed_as-underflow-check.patch " Andrew Morton
2020-06-04 21:39 ` [folded-merged] mm-page_alloc-skip-waternark_boost-for-atomic-order-0-allocations-fix.patch removed from " Andrew Morton
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