KAMEZAWA Hiroyuki d0107eb073 kcore: fix vread/vwrite to be aware of holes ... vread/vwrite access vmalloc area without checking there is a page or not. In most case, this works well. In old ages, the caller of get_vm_ara() is only IOREMAP and there is no memory hole within vm_struct's [addr...addr + size - PAGE_SIZE] ( -PAGE_SIZE is for a guard page.) After per-cpu-alloc patch, it uses get_vm_area() for reserve continuous virtual address but remap _later_. There tend to be a hole in valid vmalloc area in vm_struct lists. Then, skip the hole (not mapped page) is necessary. This patch updates vread/vwrite() for avoiding memory hole. Routines which access vmalloc area without knowing for which addr is used are - /proc/kcore - /dev/kmem kcore checks IOREMAP, /dev/kmem doesn't. After this patch, IOREMAP is checked and /dev/kmem will avoid to read/write it. Fixes to /proc/kcore will be in the next patch in series. Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: WANG Cong <xiyou.wangcong@gmail.com> Cc: Mike Smith <scgtrp@gmail.com> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2009-09-22 07:17:34 -07:00
..
allocpercpu.c	percpu: use dynamic percpu allocator as the default percpu allocator	2009-06-24 15:13:35 +09:00
backing-dev.c	writeback: splice dirty inode entries to default bdi on bdi_destroy()	2009-09-16 15:18:52 +02:00
bootmem.c	kmemleak: Do not report alloc_bootmem blocks as leaks	2009-08-27 14:29:17 +01:00
bounce.c	block: remove some includings of blktrace_api.h	2009-06-16 11:19:36 +02:00
debug-pagealloc.c	generic debug pagealloc	2009-04-01 08:59:13 -07:00
dmapool.c	dmapools: protect page_list walk in show_pools()	2009-06-30 18:56:00 -07:00
fadvise.c	readahead: move max_sane_readahead() calls into force_page_cache_readahead()	2009-06-16 19:47:28 -07:00
failslab.c	kmemtrace, mm: fix slab.h dependency problem in mm/failslab.c	2009-04-03 12:23:01 +02:00
filemap_xip.c	mm: do_xip_mapping_read: fix length calculation	2009-04-02 19:04:49 -07:00
filemap.c	mm: oom analysis: add shmem vmstat	2009-09-22 07:17:27 -07:00
fremap.c	Do not account for the address space used by hugetlbfs using VM_ACCOUNT	2009-02-10 10:48:42 -08:00
highmem.c	block: remove some includings of blktrace_api.h	2009-06-16 11:19:36 +02:00
hugetlb.c	hugetlb: restore interleaving of bootmem huge pages	2009-09-22 07:17:26 -07:00
init-mm.c	mm: consolidate init_mm definition	2009-06-16 19:47:28 -07:00
internal.h	vmscan: do not unconditionally treat zones that fail zone_reclaim() as full	2009-06-16 19:47:45 -07:00
Kconfig	ksm: add some documentation	2009-09-22 07:17:33 -07:00
Kconfig.debug	kmemcheck: enable in the x86 Kconfig	2009-06-15 15:49:15 +02:00
kmemcheck.c	kmemcheck: add hooks for the page allocator	2009-06-15 15:48:33 +02:00
kmemleak-test.c	percpu: clean up percpu variable definitions	2009-06-24 15:13:48 +09:00
kmemleak.c	kmemleak: Improve the "Early log buffer exceeded" error message	2009-09-11 10:42:09 +01:00
ksm.c	ksm: unmerge is an origin of OOMs	2009-09-22 07:17:33 -07:00
maccess.c	[S390] maccess: add weak attribute to probe_kernel_write	2009-06-12 10:27:37 +02:00
madvise.c	ksm: the mm interface to ksm	2009-09-22 07:17:31 -07:00
Makefile	ksm: the mm interface to ksm	2009-09-22 07:17:31 -07:00
memcontrol.c	cgroup avoid permanent sleep at rmdir	2009-07-29 19:10:35 -07:00
memory_hotplug.c	memory hotplug: update zone pcp at memory online	2009-09-22 07:17:25 -07:00
memory.c	ksm: fix deadlock with munlock in exit_mmap	2009-09-22 07:17:32 -07:00
mempolicy.c	mm: make set_mempolicy(MPOL_INTERLEAV) N_HIGH_MEMORY aware	2009-08-07 10:39:55 -07:00
mempool.c	mempool.c: clean up type-casting	2009-08-10 08:31:16 -07:00
migrate.c	mm: vmstat: add isolate pages	2009-09-22 07:17:29 -07:00
mincore.c	[CVE-2009-0029] System call wrappers part 14	2009-01-14 14:15:24 +01:00
mlock.c	mm: remove CONFIG_UNEVICTABLE_LRU config option	2009-06-16 19:47:42 -07:00
mm_init.c	mm: mminit_loglevel cannot be __meminitdata anymore	2008-08-20 15:40:30 -07:00
mmap.c	ksm: clean up obsolete references	2009-09-22 07:17:33 -07:00
mmu_notifier.c	ksm: add mmu_notifier set_pte_at_notify()	2009-09-22 07:17:31 -07:00
mmzone.c	[ARM] Double check memmap is actually valid with a memmap has unexpected holes V2	2009-05-18 11:22:24 +01:00
mprotect.c	perf: Do the big rename: Performance Counters -> Performance Events	2009-09-21 14:28:04 +02:00
mremap.c	ksm: mremap use err from ksm_madvise	2009-09-22 07:17:33 -07:00
msync.c	[CVE-2009-0029] System call wrappers part 13	2009-01-14 14:15:23 +01:00
nommu.c	nommu: fix error handling in do_mmap_pgoff()	2009-09-05 11:30:42 -07:00
oom_kill.c	ksm: unmerge is an origin of OOMs	2009-09-22 07:17:33 -07:00
page_alloc.c	page-allocator: change migratetype for all pageblocks within a high-order page during __rmqueue_fallback	2009-09-22 07:17:33 -07:00
page_cgroup.c	memory hotplug: alloc page from other node in memory online	2009-09-22 07:17:26 -07:00
page_io.c	mm: remove file argument from swap_readpage()	2009-06-16 19:47:44 -07:00
page_isolation.c	memory hotplug: fix page_zone() calculation in test_pages_isolated()	2008-11-06 15:41:19 -08:00
page-writeback.c	mm: count only reclaimable lru pages	2009-09-22 07:17:30 -07:00
pagewalk.c	pagemap: pass mm into pagewalkers	2008-06-12 18:05:41 -07:00
percpu.c	Merge branch 'for-next' into for-linus	2009-09-15 09:57:19 +09:00
prio_tree.c	spelling fixes: mm/	2007-10-20 01:27:18 +02:00
quicklist.c	percpu: cleanup percpu array definitions	2009-06-24 15:13:45 +09:00
readahead.c	readahead: introduce context readahead algorithm	2009-06-16 19:47:30 -07:00
rmap.c	ksm: no debug in page_dup_rmap()	2009-09-22 07:17:31 -07:00
shmem_acl.c	shmfs: use 'check_acl' instead of 'permission'	2009-09-08 11:08:46 -07:00
shmem.c	Driver Core: devtmpfs - kernel-maintained tmpfs-based /dev	2009-09-15 09:50:49 -07:00
slab.c	SLAB: Fix lockdep annotations	2009-06-29 09:57:10 +03:00
slob.c	slab: remove duplicate kmem_cache_init_late() declarations	2009-08-06 11:36:25 +03:00
slub.c	mm: kmem_cache_create(): make it easier to catch NULL cache names	2009-09-22 07:17:33 -07:00
sparse-vmemmap.c	memory hotplug: alloc page from other node in memory online	2009-09-22 07:17:26 -07:00
sparse.c	memory hotplug: alloc page from other node in memory online	2009-09-22 07:17:26 -07:00
swap_state.c	writeback: add name to backing_dev_info	2009-09-11 09:20:26 +02:00
swap.c	mm: fix Committed_AS underflow on large NR_CPUS environment	2009-05-02 15:36:10 -07:00
swapfile.c	ksm: unmerge is an origin of OOMs	2009-09-22 07:17:33 -07:00
thrash.c	mm: pass mm to grab_swap_token	2009-06-23 12:50:05 -07:00
truncate.c	mm: remove __invalidate_mapping_pages variant	2009-06-16 19:47:43 -07:00
util.c	Merge branches 'slab/documentation', 'slab/fixes', 'slob/cleanups' and 'slub/fixes' into for-linus	2009-06-17 08:30:15 +03:00
vmalloc.c	kcore: fix vread/vwrite to be aware of holes	2009-09-22 07:17:34 -07:00
vmscan.c	vmscan: kill unnecessary prefetch	2009-09-22 07:17:30 -07:00
vmstat.c	mm: vmstat: add isolate pages	2009-09-22 07:17:29 -07:00