Hugh Dickins 66fc130394 mm: shmem_zero_setup skip security check and lockdep conflict with XFS ... It appears that, at some point last year, XFS made directory handling changes which bring it into lockdep conflict with shmem_zero_setup(): it is surprising that mmap() can clone an inode while holding mmap_sem, but that has been so for many years. Since those few lockdep traces that I've seen all implicated selinux, I'm hoping that we can use the __shmem_file_setup(,,,S_PRIVATE) which v3.13's commit c727709092 ("security: shmem: implement kernel private shmem inodes") introduced to avoid LSM checks on kernel-internal inodes: the mmap("/dev/zero") cloned inode is indeed a kernel-internal detail. This also covers the !CONFIG_SHMEM use of ramfs to support /dev/zero (and MAP_SHARED|MAP_ANONYMOUS). I thought there were also drivers which cloned inode in mmap(), but if so, I cannot locate them now. Reported-and-tested-by: Prarit Bhargava <prarit@redhat.com> Reported-and-tested-by: Daniel Wagner <wagi@monom.org> Reported-and-tested-by: Morten Stevens <mstevens@fedoraproject.org> Signed-off-by: Hugh Dickins <hughd@google.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2015-06-17 20:40:19 -10:00
..
kasan	mm/mempool.c: kasan: poison mempool elements	2015-04-15 16:35:20 -07:00
Kconfig	mm: cma: debugfs interface	2015-04-14 16:49:00 -07:00
Kconfig.debug	mm/debug_pagealloc: remove obsolete Kconfig options	2015-01-08 15:10:52 -08:00
Makefile	mm: move memtest under mm	2015-04-14 16:49:06 -07:00
backing-dev.c	block: discard bdi_unregister() in favour of bdi_destroy()	2015-05-28 10:12:42 -06:00
balloon_compaction.c	mm/balloon_compaction: fix deflation when compaction is disabled	2014-10-29 16:33:15 -07:00
bootmem.c	mem-hotplug: reset node managed pages when hot-adding a new pgdat	2014-11-13 16:17:06 -08:00
cleancache.c	cleancache: remove limit on the number of cleancache enabled filesystems	2015-04-14 16:49:03 -07:00
cma.c	mm: cma: add trace events for CMA allocations and freeings	2015-04-15 16:35:19 -07:00
cma.h	mm: cma: allocation trigger	2015-04-14 16:49:00 -07:00
cma_debug.c	mm/cma_debug.c: remove blank lines before DEFINE_SIMPLE_ATTRIBUTE()	2015-04-15 16:35:20 -07:00
compaction.c	mm/compaction.c: fix "suitable_migration_target() unused" warning	2015-04-15 16:35:20 -07:00
debug-pagealloc.c	mm/debug-pagealloc: make debug-pagealloc boottime configurable	2014-12-13 12:42:48 -08:00
debug.c	mm: account pmd page tables to the process	2015-02-11 17:06:04 -08:00
dmapool.c	mm/dmapool.c: fixed a brace coding style issue	2014-10-09 22:26:00 -04:00
early_ioremap.c	mm: create generic early_ioremap() support	2014-04-07 16:36:15 -07:00
fadvise.c	vfs: remove get_xip_mem	2015-02-16 17:56:03 -08:00
failslab.c	switch debugfs to umode_t	2012-01-03 22:54:56 -05:00
filemap.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2015-04-16 23:27:56 -04:00
frontswap.c	mm/frontswap.c: fix the condition in BUG_ON	2014-12-10 17:41:08 -08:00
gup.c	mm: use READ_ONCE() for non-scalar types	2015-04-15 16:35:18 -07:00
highmem.c	mm/highmem: make kmap cache coloring aware	2014-08-06 18:01:22 -07:00
huge_memory.c	thp: cleanup khugepaged startup	2015-04-15 16:35:19 -07:00
hugetlb.c	mm: hugetlb: cleanup using paeg_huge_active()	2015-04-15 16:35:19 -07:00
hugetlb_cgroup.c	mm: page_counter: pull "-1" handling out of page_counter_memparse()	2015-02-11 17:06:02 -08:00
hwpoison-inject.c	mm/hwpoison-inject: check PageLRU of hpage	2015-05-05 17:10:11 -07:00
init-mm.c	atomic: use <linux/atomic.h>	2011-07-26 16:49:47 -07:00
internal.h	mm: remove rest of ACCESS_ONCE() usages	2015-04-15 16:35:18 -07:00
interval_tree.c	mm: replace vma->sharead.linear with vma->shared	2015-02-10 14:30:31 -08:00
kmemcheck.c	mm/slab_common: move kmem_cache definition to internal header	2014-10-09 22:25:50 -04:00
kmemleak-test.c	mm/kmemleak-test.c: use pr_fmt for logging	2014-06-06 16:08:18 -07:00
kmemleak.c	gfp: add __GFP_NOACCOUNT	2015-05-14 17:55:51 -07:00
ksm.c	mm: remove rest of ACCESS_ONCE() usages	2015-04-15 16:35:18 -07:00
list_lru.c	memcg: reparent list_lrus and free kmemcg_id on css offline	2015-02-12 18:54:10 -08:00
maccess.c	mm: Map most files to use export.h instead of module.h	2011-10-31 09:20:12 -04:00
madvise.c	vfs: remove get_xip_mem	2015-02-16 17:56:03 -08:00
memblock.c	mm/memblock.c: add debug output for memblock_add()	2015-04-15 16:35:19 -07:00
memcontrol.c	mm: memcontrol: fix false-positive VM_BUG_ON() on -rt	2015-06-10 16:43:43 -07:00
memory-failure.c	mm: soft-offline: fix num_poisoned_pages counting on concurrent events	2015-05-05 17:10:10 -07:00
memory.c	mm: new pfn_mkwrite same as page_mkwrite for VM_PFNMAP	2015-04-15 16:35:20 -07:00
memory_hotplug.c	mm/memory_hotplug.c: set zone->wait_table to null after freeing it	2015-06-10 16:43:43 -07:00
mempolicy.c	mm, numa: really disable NUMA balancing by default on single node machines	2015-05-14 17:55:51 -07:00
mempool.c	mm/mempool.c: kasan: poison mempool elements	2015-04-15 16:35:20 -07:00
memtest.c	memtest: use phys_addr_t for physical addresses	2015-04-14 16:49:06 -07:00
migrate.c	mm/migrate: check-before-clear PageSwapCache	2015-04-15 16:35:17 -07:00
mincore.c	mincore: apply page table walker on do_mincore()	2015-02-11 17:06:06 -08:00
mlock.c	mm: move mm_populate()-related code to mm/gup.c	2015-04-14 16:49:00 -07:00
mm_init.c	mm/mm_init.c: mark mminit_loglevel __meminitdata	2015-02-12 18:54:11 -08:00
mmap.c	mm/mmap.c: use while instead of if+goto	2015-04-15 16:35:19 -07:00
mmu_context.c	sched/mm: call finish_arch_post_lock_switch in idle_task_exit and use_mm	2014-02-21 08:50:17 +01:00
mmu_notifier.c	mmu_notifier: add the callback for mmu_notifier_invalidate_range()	2014-11-13 13:46:09 +11:00
mmzone.c	mm: microoptimize zonelist operations	2015-02-11 17:06:02 -08:00
mprotect.c	mm: numa: preserve PTE write permissions across a NUMA hinting fault	2015-03-25 16:20:31 -07:00
mremap.c	mm/mremap.c: clean up goto just return ERR_PTR	2015-04-15 16:35:18 -07:00
msync.c	mm: remove rest usage of VM_NONLINEAR and pte_file()	2015-02-10 14:30:31 -08:00
nobootmem.c	mem-hotplug: reset node managed pages when hot-adding a new pgdat	2014-11-13 16:17:06 -08:00
nommu.c	nommu: use __vfs_read()	2015-04-11 22:27:56 -04:00
oom_kill.c	mm/oom_kill.c: fix typo in comment	2015-04-15 16:35:16 -07:00
page-writeback.c	writeback: use |1 instead of +1 to protect against div by zero	2015-04-23 10:36:33 -06:00
page_alloc.c	mm: remove rest of ACCESS_ONCE() usages	2015-04-15 16:35:18 -07:00
page_counter.c	mm: page_counter: pull "-1" handling out of page_counter_memparse()	2015-02-11 17:06:02 -08:00
page_ext.c	mm/page_owner: keep track of page owners	2014-12-13 12:42:48 -08:00
page_io.c	direct_IO: remove rw from a_ops->direct_IO()	2015-04-11 22:29:45 -04:00
page_isolation.c	CMA: page_isolation: check buddy before accessing it	2015-05-14 17:55:51 -07:00
page_owner.c	mm/page_owner.c: remove unnecessary stack_trace field	2015-02-11 17:06:07 -08:00
pagewalk.c	mm/pagewalk.c: prevent positive return value of walk_page_test() from being passed to callers	2015-03-25 16:20:30 -07:00
percpu-km.c	percpu: implmeent pcpu_nr_empty_pop_pages and chunk->nr_populated	2014-09-02 14:46:05 -04:00
percpu-vm.c	percpu: move region iterations out of pcpu_[de]populate_chunk()	2014-09-02 14:46:02 -04:00
percpu.c	percpu: Fix trivial typos in comments	2015-03-24 13:41:54 -04:00
pgtable-generic.c	mm: convert p[te|md]_mknonnuma and remaining page table manipulations	2015-02-12 18:54:08 -08:00
process_vm_access.c	process_vm_access: switch to {compat_,}import_iovec()	2015-04-11 22:27:12 -04:00
quicklist.c	mm: delete various needless include <linux/module.h>	2011-10-31 09:20:11 -04:00
readahead.c	fs: export inode_to_bdi and use it in favor of mapping->backing_dev_info	2015-01-20 14:03:04 -07:00
rmap.c	mm: remove rest of ACCESS_ONCE() usages	2015-04-15 16:35:18 -07:00
shmem.c	mm: shmem_zero_setup skip security check and lockdep conflict with XFS	2015-06-17 20:40:19 -10:00
slab.c	mm: remove GFP_THISNODE	2015-04-14 16:49:03 -07:00
slab.h	slub: make dead caches discard free slabs immediately	2015-02-12 18:54:10 -08:00
slab_common.c	mm: slub: add kernel address sanitizer support for slub allocator	2015-02-13 21:21:41 -08:00
slob.c	slob: make slob_alloc_node() static and remove EXPORT_SYMBOL()	2015-04-14 16:48:59 -07:00
slub.c	mm: remove rest of ACCESS_ONCE() usages	2015-04-15 16:35:18 -07:00
sparse-vmemmap.c	mm/sparse: use memblock apis for early memory allocations	2014-01-21 16:19:47 -08:00
sparse.c	mm: use macros from compiler.h instead of __attribute__((...))	2014-04-07 16:35:54 -07:00
swap.c	mm: don't call __page_cache_release for hugetlb	2015-04-15 16:35:19 -07:00
swap_cgroup.c	mm: page_cgroup: rename file to mm/swap_cgroup.c	2014-12-10 17:41:09 -08:00
swap_state.c	mm: remove rest of ACCESS_ONCE() usages	2015-04-15 16:35:18 -07:00
swapfile.c	mm: remove rest of ACCESS_ONCE() usages	2015-04-15 16:35:18 -07:00
truncate.c	mm: rename deactivate_page to deactivate_file_page	2015-04-15 16:35:17 -07:00
util.c	mm: uninline and cleanup page-mapping related helpers	2015-04-15 16:35:19 -07:00
vmacache.c	mm,vmacache: count number of system-wide flushes	2014-12-13 12:42:48 -08:00
vmalloc.c	mm/vmalloc: get rid of dirty bitmap inside vmap_block structure	2015-04-15 16:35:18 -07:00
vmpressure.c	mm/vmpressure.c: fix race in vmpressure_work_fn()	2014-12-02 17:32:07 -08:00
vmscan.c	Merge branch 'akpm' (patches from Andrew)	2015-02-12 18:54:28 -08:00
vmstat.c	vmstat: Reduce time interval to stat update on idle cpu	2015-02-11 17:06:07 -08:00
workingset.c	list_lru: add helpers to isolate items	2015-02-12 18:54:10 -08:00
zbud.c	mm/zpool: add name argument to create zpool	2015-02-12 18:54:12 -08:00
zpool.c	mm/zpool: add name argument to create zpool	2015-02-12 18:54:12 -08:00
zsmalloc.c	zsmalloc: fix a null pointer dereference in destroy_handle_cache()	2015-06-10 16:43:43 -07:00
zswap.c	mm/zpool: add name argument to create zpool	2015-02-12 18:54:12 -08:00