Sean Rees 49f68ccccf mm/slub.c: fix random_seq offset destruction ...

commit a810007afe upstream.

Commit 210e7a43fa ("mm: SLUB freelist randomization") broke USB hub
initialisation as described in

  https://bugzilla.kernel.org/show_bug.cgi?id=177551.

Bail out early from init_cache_random_seq if s->random_seq is already
initialised.  This prevents destroying the previously computed
random_seq offsets later in the function.

If the offsets are destroyed, then shuffle_freelist will truncate
page->freelist to just the first object (orphaning the rest).

Fixes: 210e7a43fa ("mm: SLUB freelist randomization")
Link: http://lkml.kernel.org/r/20170207140707.20824-1-sean@erifax.org
Signed-off-by: Sean Rees <sean@erifax.org>
Reported-by: <userwithuid@gmail.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Thomas Garnier <thgarnie@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2017-02-14 15:25:35 -08:00

..

kasan

kasan: support use-after-scope detection

2016-11-30 16:32:52 -08:00

backing-dev.c

…

balloon_compaction.c

…

bootmem.c

mm: kmemleak: avoid using __va() on addresses that don't have a lowmem mapping

2016-10-11 15:06:33 -07:00

cleancache.c

…

cma_debug.c

…

cma.c

mm/cma.c: check the max limit for cma allocation

2016-11-11 08:12:37 -08:00

cma.h

…

compaction.c

mm, compaction: fix NR_ISOLATED_* stats for pfn based migration

2017-01-12 11:39:32 +01:00

debug_page_ref.c

…

debug.c

mm: clarify why we avoid page_mapcount() for slab pages in dump_page()

2016-10-07 18:46:29 -07:00

dmapool.c

…

early_ioremap.c

…

fadvise.c

…

failslab.c

…

filemap.c

mm, fs: check for fatal signals in do_generic_file_read()

2017-02-09 08:08:28 +01:00

frame_vector.c

mm: replace get_vaddr_frames() write/force parameters with gup_flags

2016-10-19 08:11:24 -07:00

frontswap.c

…

gup.c

mm: unexport __get_user_pages()

2016-10-24 19:13:20 -07:00

highmem.c

…

huge_memory.c

mm/huge_memory.c: respect FOLL_FORCE/FOLL_COW for thp

2017-02-01 08:33:04 +01:00

hugetlb_cgroup.c

…

hugetlb.c

mm/hugetlb.c: fix reservation race when freeing surplus pages

2017-01-19 20:17:59 +01:00

hwpoison-inject.c

…

init-mm.c

mm: Add a user_ns owner to mm_struct and fix ptrace permission checks

2017-01-06 10:40:13 +01:00

internal.h

mm, compaction: make full priority ignore pageblock suitability

2016-10-07 18:46:29 -07:00

interval_tree.c

…

Kconfig

Allow KASAN and HOTPLUG_MEMORY to co-exist when doing build testing

2016-10-27 16:23:01 -07:00

Kconfig.debug

…

khugepaged.c

mm: khugepaged: fix radix tree node leak in shmem collapse error path

2017-01-12 11:39:32 +01:00

kmemcheck.c

…

kmemleak-test.c

…

kmemleak.c

mm: kmemleak: scan .data.ro_after_init

2016-11-11 08:12:37 -08:00

ksm.c

mm,ksm: add __GFP_HIGH to the allocation in alloc_stable_node()

2016-10-07 18:46:29 -07:00

list_lru.c

mm/list_lru.c: avoid error-path NULL pointer deref

2016-10-27 18:43:42 -07:00

maccess.c

…

madvise.c

…

Makefile

Disable the __builtin_return_address() warning globally after all

2016-10-12 10:23:41 -07:00

memblock.c

mm: kmemleak: avoid using __va() on addresses that don't have a lowmem mapping

2016-10-11 15:06:33 -07:00

memcontrol.c

mm, memcg: do not retry precharge charges

2017-02-01 08:33:14 +01:00

memory_hotplug.c

base/memory, hotplug: fix a kernel oops in show_valid_zones()

2017-02-09 08:08:28 +01:00

memory-failure.c

mm: hwpoison: fix thp split handling in memory_failure()

2016-11-11 08:12:37 -08:00

memory.c

ptrace: Don't allow accessing an undumpable mm

2017-01-06 10:40:13 +01:00

mempolicy.c

mm/mempolicy.c: do not put mempolicy before using its nodemask

2017-02-01 08:33:04 +01:00

mempool.c

…

memtest.c

…

migrate.c

mm, compaction: fix NR_ISOLATED_* stats for pfn based migration

2017-01-12 11:39:32 +01:00

mincore.c

mm, swap: use offset of swap entry as key of swap cache

2016-10-07 18:46:28 -07:00

mlock.c

thp: fix corner case of munlock() of PTE-mapped THPs

2016-11-30 16:32:52 -08:00

mm_init.c

…

mmap.c

mm: vma_merge: correct false positive from __vma_unlink->validate_mm_rb

2016-10-07 18:46:29 -07:00

mmu_context.c

…

mmu_notifier.c

…

mmzone.c

…

mprotect.c

mm/numa: Remove duplicated include from mprotect.c

2016-10-19 17:28:48 +02:00

mremap.c

mremap: move_ptes: check pte dirty after its removal

2016-11-29 08:20:24 -08:00

msync.c

…

nobootmem.c

mm: kmemleak: avoid using __va() on addresses that don't have a lowmem mapping

2016-10-11 15:06:33 -07:00

nommu.c

ptrace: Don't allow accessing an undumpable mm

2017-01-06 10:40:13 +01:00

oom_kill.c

oom: print nodemask in the oom report

2016-10-07 18:46:29 -07:00

page_alloc.c

mm, page_alloc: fix premature OOM when racing with cpuset mems update

2017-02-01 08:33:05 +01:00

page_counter.c

…

page_ext.c

mm/page_ext: support extra space allocation by page_ext user

2016-10-07 18:46:27 -07:00

page_idle.c

…

page_io.c

mm/page_io.c: replace some BUG_ON()s with VM_BUG_ON_PAGE()

2016-10-07 18:46:29 -07:00

page_isolation.c

mm/page_isolation: fix typo: "paes" -> "pages"

2016-10-07 18:46:29 -07:00

page_owner.c

mm/page_owner: don't define fields on struct page_ext by hard-coding

2016-10-07 18:46:27 -07:00

page_poison.c

…

page-writeback.c

mm: don't use radix tree writeback tags for pages in swap cache

2016-10-07 18:46:28 -07:00

pagewalk.c

…

percpu-km.c

…

percpu-vm.c

…

percpu.c

…

pgtable-generic.c

…

process_vm_access.c

mm: remove write/force parameters from __get_user_pages_unlocked()

2016-10-18 14:13:37 -07:00

quicklist.c

…

readahead.c

…

rmap.c

…

shmem.c

shmem: fix shm fallocate() list corruption

2016-12-06 08:59:05 -08:00

slab_common.c

memcg: prevent memcg caches to be both OFF_SLAB & OBJFREELIST_SLAB

2016-11-11 08:12:37 -08:00

slab.c

mm/slab.c: fix SLAB freelist randomization duplicate entries

2017-01-19 20:17:59 +01:00

slab.h

mm/slab: improve performance of gathering slabinfo stats

2016-10-27 18:43:43 -07:00

slob.c

…

slub.c

mm/slub.c: fix random_seq offset destruction

2017-02-14 15:25:35 -08:00

sparse-vmemmap.c

…

sparse.c

…

swap_cgroup.c

…

swap_state.c

mm, swap: use offset of swap entry as key of swap cache

2016-10-07 18:46:28 -07:00

swap.c

thp: reduce usage of huge zero page's atomic counter

2016-10-07 18:46:28 -07:00

swapfile.c

mm: support anonymous stable page

2017-01-19 20:17:59 +01:00

truncate.c

mm: fix false-positive WARN_ON() in truncate/invalidate for hugetlb

2016-11-30 16:32:52 -08:00

usercopy.c

…

userfaultfd.c

…

util.c

Merge branch 'mm-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2016-10-22 09:39:10 -07:00

vmacache.c

mm: unrig VMA cache hit ratio

2016-10-07 18:46:27 -07:00

vmalloc.c

mm: consolidate warn_alloc_failed users

2016-10-07 18:46:29 -07:00

vmpressure.c

…

vmscan.c

mm, memcg: fix the active list aging for lowmem requests when memcg is enabled

2017-01-19 20:17:59 +01:00

vmstat.c

seq/proc: modify seq_put_decimal_[u]ll to take a const char *, not char

2016-10-07 18:46:30 -07:00

workingset.c

mm: workingset: fix NULL ptr in count_shadow_nodes

2016-12-02 18:48:03 -08:00

z3fold.c

…

zbud.c

…

zpool.c

…

zsmalloc.c

…

zswap.c

zswap: disable changing params if init fails

2017-02-09 08:08:27 +01:00