Joerg Roedel 3f8fd02b1b mm/vmalloc: Sync unmappings in __purge_vmap_area_lazy() ... On x86-32 with PTI enabled, parts of the kernel page-tables are not shared between processes. This can cause mappings in the vmalloc/ioremap area to persist in some page-tables after the region is unmapped and released. When the region is re-used the processes with the old mappings do not fault in the new mappings but still access the old ones. This causes undefined behavior, in reality often data corruption, kernel oopses and panics and even spontaneous reboots. Fix this problem by activly syncing unmaps in the vmalloc/ioremap area to all page-tables in the system before the regions can be re-used. References: https://bugzilla.suse.com/show_bug.cgi?id=1118689 Fixes: 5d72b4fba4 ('x86, mm: support huge I/O mapping capability I/F') Signed-off-by: Joerg Roedel <jroedel@suse.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Dave Hansen <dave.hansen@linux.intel.com> Link: https://lkml.kernel.org/r/20190719184652.11391-4-joro@8bytes.org		2019-07-22 10:18:30 +02:00
..
kasan	mm/kasan: change kasan_check_{read,write} to return boolean	2019-07-12 11:05:42 -07:00
Kconfig	mm: introduce ARCH_HAS_PTE_DEVMAP	2019-07-16 19:23:25 -07:00
Kconfig.debug	mm, debug_pagealloc: use a page type instead of page_ext flag	2019-07-12 11:05:43 -07:00
Makefile	HMM patches for 5.3	2019-07-14 19:42:11 -07:00
backing-dev.c	…
balloon_compaction.c	…
cleancache.c	Driver Core and debugfs changes for 5.3-rc1	2019-07-12 12:24:03 -07:00
cma.c	mm/cma.c: fail if fixed declaration can't be honored	2019-07-16 19:23:21 -07:00
cma.h	…
cma_debug.c	…
compaction.c	…
debug.c	…
debug_page_ref.c	…
dmapool.c	mm: security: introduce init_on_alloc=1 and init_on_free=1 boot options	2019-07-12 11:05:46 -07:00
early_ioremap.c	…
fadvise.c	…
failslab.c	mm/failslab.c: by default, do not fail allocations with direct reclaim only	2019-07-12 11:05:43 -07:00
filemap.c	mm/filemap.c: correct the comment about VM_FAULT_RETRY	2019-07-12 11:05:43 -07:00
frame_vector.c	…
frontswap.c	…
gup.c	mm: introduce ARCH_HAS_PTE_DEVMAP	2019-07-16 19:23:25 -07:00
gup_benchmark.c	…
highmem.c	…
hmm.c	HMM patches for 5.3	2019-07-14 19:42:11 -07:00
huge_memory.c	mm: thp: fix false negative of shmem vma's THP eligibility	2019-07-18 17:08:06 -07:00
hugetlb.c	mm: hugetlb: soft-offline: dissolve_free_huge_page() return zero on !PageHuge	2019-06-29 16:43:45 +08:00
hugetlb_cgroup.c	…
hwpoison-inject.c	…
init-mm.c	…
internal.h	…
interval_tree.c	…
khugepaged.c	Revert "mm: page cache: store only head pages in i_pages"	2019-07-05 19:55:18 -07:00
kmemleak-test.c	…
kmemleak.c	Driver Core and debugfs changes for 5.3-rc1	2019-07-12 12:24:03 -07:00
ksm.c	…
list_lru.c	mm: memcg/slab: stop setting page->mem_cgroup pointer for slab pages	2019-07-12 11:05:44 -07:00
maccess.c	The main changes in this release include:	2019-07-18 11:51:00 -07:00
madvise.c	mm: remove MEMORY_DEVICE_PUBLIC support	2019-07-02 14:32:43 -03:00
memblock.c	…
memcontrol.c	mm/memcontrol.c: keep local VM counters in sync with the hierarchical ones	2019-07-16 19:23:21 -07:00
memfd.c	Revert "mm: page cache: store only head pages in i_pages"	2019-07-05 19:55:18 -07:00
memory-failure.c	HMM patches for 5.3	2019-07-14 19:42:11 -07:00
memory.c	mm: thp: make transhuge_vma_suitable available for anonymous THP	2019-07-18 17:08:06 -07:00
memory_hotplug.c	mm/sparsemem: cleanup 'section number' data types	2019-07-18 17:08:07 -07:00
mempolicy.c	mm: export alloc_pages_vma	2019-07-02 14:32:44 -03:00
mempool.c	…
memtest.c	…
migrate.c	mm: migrate: remove unused mode argument	2019-07-18 17:08:07 -07:00
mincore.c	mm/mincore.c: fix race between swapoff and mincore	2019-07-12 11:05:43 -07:00
mlock.c	…
mm_init.c	…
mmap.c	…
mmu_context.c	…
mmu_gather.c	…
mmu_notifier.c	mm/mmu_notifier: use hlist_add_head_rcu()	2019-07-12 11:05:46 -07:00
mmzone.c	…
mprotect.c	…
mremap.c	…
msync.c	…
nommu.c	mm: fix the MAP_UNINITIALIZED flag	2019-07-16 19:23:21 -07:00
oom_kill.c	mm/oom_kill.c: remove redundant OOM score normalization in select_bad_process()	2019-07-12 11:05:47 -07:00
page-writeback.c	mm: remove the account_page_dirtied export	2019-07-12 11:05:42 -07:00
page_alloc.c	mm/sparsemem: support sub-section hotplug	2019-07-18 17:08:07 -07:00
page_counter.c	…
page_ext.c	mm, debug_pagealloc: use a page type instead of page_ext flag	2019-07-12 11:05:43 -07:00
page_idle.c	mm/page_idle.c: fix oops because end_pfn is larger than max_pfn	2019-06-29 16:43:45 +08:00
page_io.c	mm, swap: use rbtree for swap_extent	2019-07-12 11:05:43 -07:00
page_isolation.c	mm/page_isolation.c: change the prototype of undo_isolate_page_range()	2019-07-12 11:05:43 -07:00
page_owner.c	…
page_poison.c	…
page_vma_mapped.c	…
pagewalk.c	…
percpu-internal.h	…
percpu-km.c	…
percpu-stats.c	…
percpu-vm.c	…
percpu.c	…
pgtable-generic.c	…
process_vm_access.c	…
quicklist.c	…
readahead.c	…
rmap.c	…
rodata_test.c	…
shmem.c	Merge branch 'work.mount0' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2019-07-19 10:42:02 -07:00
shuffle.c	…
shuffle.h	…
slab.c	mm: security: introduce init_on_alloc=1 and init_on_free=1 boot options	2019-07-12 11:05:46 -07:00
slab.h	mm: security: introduce init_on_alloc=1 and init_on_free=1 boot options	2019-07-12 11:05:46 -07:00
slab_common.c	mm/slab_common.c: work around clang bug #42570	2019-07-16 19:23:21 -07:00
slob.c	mm/slab: refactor common ksize KASAN logic into slab_common.c	2019-07-12 11:05:42 -07:00
slub.c	mm: security: introduce init_on_alloc=1 and init_on_free=1 boot options	2019-07-12 11:05:46 -07:00
sparse-vmemmap.c	mm/sparsemem: convert kmalloc_section_memmap() to populate_section_memmap()	2019-07-18 17:08:07 -07:00
sparse.c	mm/sparsemem: cleanup 'section number' data types	2019-07-18 17:08:07 -07:00
swap.c	docs: admin-guide: move sysctl directory to it	2019-07-15 11:03:01 -03:00
swap_cgroup.c	…
swap_slots.c	…
swap_state.c	mm/swap_state.c: simplify total_swapcache_pages() with get_swap_device()	2019-07-12 11:05:43 -07:00
swapfile.c	mm, swap: use rbtree for swap_extent	2019-07-12 11:05:43 -07:00
truncate.c	…
usercopy.c	…
userfaultfd.c	…
util.c	mm: add account_locked_vm utility function	2019-07-16 19:23:25 -07:00
vmacache.c	…
vmalloc.c	mm/vmalloc: Sync unmappings in __purge_vmap_area_lazy()	2019-07-22 10:18:30 +02:00
vmpressure.c	…
vmscan.c	mm/vmscan.c: add checks for incorrect handling of current->reclaim_state	2019-07-16 19:23:21 -07:00
vmstat.c	…
workingset.c	…
z3fold.c	Merge branch 'work.mount0' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2019-07-19 10:42:02 -07:00
zbud.c	…
zpool.c	…
zsmalloc.c	Merge branch 'work.mount0' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2019-07-19 10:42:02 -07:00
zswap.c	…