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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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d37d1fa015
Some memory management calls imply memory barriers that are required to
avoid false positives. For example, without the correct instrumentation,
we could observe data races of the following variant:
T0 | T1
------------------------+------------------------
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*a = 42; ---+ |
kfree(a); | |
| | b = kmalloc(..); // b == a
<reordered> <-+ | *b = 42; // not a data race!
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Therefore, instrument memory barriers in all allocator code currently
not being instrumented in a default build.
Signed-off-by: Marco Elver <elver@google.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
134 lines
4.8 KiB
Makefile
134 lines
4.8 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
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#
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# Makefile for the linux memory manager.
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#
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KASAN_SANITIZE_slab_common.o := n
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KASAN_SANITIZE_slab.o := n
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KASAN_SANITIZE_slub.o := n
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KCSAN_SANITIZE_kmemleak.o := n
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# These produce frequent data race reports: most of them are due to races on
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# the same word but accesses to different bits of that word. Re-enable KCSAN
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# for these when we have more consensus on what to do about them.
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KCSAN_SANITIZE_slab_common.o := n
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KCSAN_SANITIZE_slab.o := n
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KCSAN_SANITIZE_slub.o := n
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KCSAN_SANITIZE_page_alloc.o := n
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# But enable explicit instrumentation for memory barriers.
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KCSAN_INSTRUMENT_BARRIERS := y
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# These files are disabled because they produce non-interesting and/or
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# flaky coverage that is not a function of syscall inputs. E.g. slab is out of
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# free pages, or a task is migrated between nodes.
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KCOV_INSTRUMENT_slab_common.o := n
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KCOV_INSTRUMENT_slob.o := n
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KCOV_INSTRUMENT_slab.o := n
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KCOV_INSTRUMENT_slub.o := n
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KCOV_INSTRUMENT_page_alloc.o := n
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KCOV_INSTRUMENT_debug-pagealloc.o := n
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KCOV_INSTRUMENT_kmemleak.o := n
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KCOV_INSTRUMENT_memcontrol.o := n
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KCOV_INSTRUMENT_mmzone.o := n
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KCOV_INSTRUMENT_vmstat.o := n
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KCOV_INSTRUMENT_failslab.o := n
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CFLAGS_init-mm.o += $(call cc-disable-warning, override-init)
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CFLAGS_init-mm.o += $(call cc-disable-warning, initializer-overrides)
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mmu-y := nommu.o
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mmu-$(CONFIG_MMU) := highmem.o memory.o mincore.o \
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mlock.o mmap.o mmu_gather.o mprotect.o mremap.o \
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msync.o page_vma_mapped.o pagewalk.o \
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pgtable-generic.o rmap.o vmalloc.o
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ifdef CONFIG_CROSS_MEMORY_ATTACH
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mmu-$(CONFIG_MMU) += process_vm_access.o
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endif
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obj-y := filemap.o mempool.o oom_kill.o fadvise.o \
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maccess.o page-writeback.o folio-compat.o \
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readahead.o swap.o truncate.o vmscan.o shmem.o \
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util.o mmzone.o vmstat.o backing-dev.o \
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mm_init.o percpu.o slab_common.o \
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compaction.o vmacache.o \
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interval_tree.o list_lru.o workingset.o \
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debug.o gup.o mmap_lock.o $(mmu-y)
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# Give 'page_alloc' its own module-parameter namespace
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page-alloc-y := page_alloc.o
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page-alloc-$(CONFIG_SHUFFLE_PAGE_ALLOCATOR) += shuffle.o
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# Give 'memory_hotplug' its own module-parameter namespace
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memory-hotplug-$(CONFIG_MEMORY_HOTPLUG) += memory_hotplug.o
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obj-y += page-alloc.o
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obj-y += init-mm.o
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obj-y += memblock.o
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obj-y += $(memory-hotplug-y)
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ifdef CONFIG_MMU
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obj-$(CONFIG_ADVISE_SYSCALLS) += madvise.o
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endif
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obj-$(CONFIG_SWAP) += page_io.o swap_state.o swapfile.o swap_slots.o
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obj-$(CONFIG_FRONTSWAP) += frontswap.o
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obj-$(CONFIG_ZSWAP) += zswap.o
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obj-$(CONFIG_HAS_DMA) += dmapool.o
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obj-$(CONFIG_HUGETLBFS) += hugetlb.o
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obj-$(CONFIG_HUGETLB_PAGE_FREE_VMEMMAP) += hugetlb_vmemmap.o
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obj-$(CONFIG_NUMA) += mempolicy.o
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obj-$(CONFIG_SPARSEMEM) += sparse.o
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obj-$(CONFIG_SPARSEMEM_VMEMMAP) += sparse-vmemmap.o
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obj-$(CONFIG_SLOB) += slob.o
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obj-$(CONFIG_MMU_NOTIFIER) += mmu_notifier.o
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obj-$(CONFIG_KSM) += ksm.o
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obj-$(CONFIG_PAGE_POISONING) += page_poison.o
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obj-$(CONFIG_SLAB) += slab.o
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obj-$(CONFIG_SLUB) += slub.o
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obj-$(CONFIG_KASAN) += kasan/
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obj-$(CONFIG_KFENCE) += kfence/
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obj-$(CONFIG_FAILSLAB) += failslab.o
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obj-$(CONFIG_MEMTEST) += memtest.o
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obj-$(CONFIG_MIGRATION) += migrate.o
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obj-$(CONFIG_TRANSPARENT_HUGEPAGE) += huge_memory.o khugepaged.o
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obj-$(CONFIG_PAGE_COUNTER) += page_counter.o
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obj-$(CONFIG_MEMCG) += memcontrol.o vmpressure.o
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obj-$(CONFIG_MEMCG_SWAP) += swap_cgroup.o
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obj-$(CONFIG_CGROUP_HUGETLB) += hugetlb_cgroup.o
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obj-$(CONFIG_GUP_TEST) += gup_test.o
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obj-$(CONFIG_MEMORY_FAILURE) += memory-failure.o
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obj-$(CONFIG_HWPOISON_INJECT) += hwpoison-inject.o
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obj-$(CONFIG_DEBUG_KMEMLEAK) += kmemleak.o
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obj-$(CONFIG_DEBUG_RODATA_TEST) += rodata_test.o
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obj-$(CONFIG_DEBUG_VM_PGTABLE) += debug_vm_pgtable.o
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obj-$(CONFIG_PAGE_OWNER) += page_owner.o
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obj-$(CONFIG_CLEANCACHE) += cleancache.o
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obj-$(CONFIG_MEMORY_ISOLATION) += page_isolation.o
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obj-$(CONFIG_ZPOOL) += zpool.o
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obj-$(CONFIG_ZBUD) += zbud.o
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obj-$(CONFIG_ZSMALLOC) += zsmalloc.o
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obj-$(CONFIG_Z3FOLD) += z3fold.o
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obj-$(CONFIG_GENERIC_EARLY_IOREMAP) += early_ioremap.o
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obj-$(CONFIG_CMA) += cma.o
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obj-$(CONFIG_MEMORY_BALLOON) += balloon_compaction.o
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obj-$(CONFIG_PAGE_EXTENSION) += page_ext.o
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obj-$(CONFIG_CMA_DEBUGFS) += cma_debug.o
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obj-$(CONFIG_SECRETMEM) += secretmem.o
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obj-$(CONFIG_CMA_SYSFS) += cma_sysfs.o
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obj-$(CONFIG_USERFAULTFD) += userfaultfd.o
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obj-$(CONFIG_IDLE_PAGE_TRACKING) += page_idle.o
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obj-$(CONFIG_DEBUG_PAGE_REF) += debug_page_ref.o
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obj-$(CONFIG_DAMON) += damon/
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obj-$(CONFIG_HARDENED_USERCOPY) += usercopy.o
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obj-$(CONFIG_PERCPU_STATS) += percpu-stats.o
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obj-$(CONFIG_ZONE_DEVICE) += memremap.o
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obj-$(CONFIG_HMM_MIRROR) += hmm.o
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obj-$(CONFIG_MEMFD_CREATE) += memfd.o
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obj-$(CONFIG_MAPPING_DIRTY_HELPERS) += mapping_dirty_helpers.o
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obj-$(CONFIG_PTDUMP_CORE) += ptdump.o
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obj-$(CONFIG_PAGE_REPORTING) += page_reporting.o
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obj-$(CONFIG_IO_MAPPING) += io-mapping.o
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obj-$(CONFIG_HAVE_BOOTMEM_INFO_NODE) += bootmem_info.o
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obj-$(CONFIG_GENERIC_IOREMAP) += ioremap.o
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