linux/mm
Ken Chen 6649a38632 [PATCH] hugetlb: preserve hugetlb pte dirty state
__unmap_hugepage_range() is buggy that it does not preserve dirty state of
huge_pte when unmapping hugepage range.  It causes data corruption in the
event of dop_caches being used by sys admin.  For example, an application
creates a hugetlb file, modify pages, then unmap it.  While leaving the
hugetlb file alive, comes along sys admin doing a "echo 3 >
/proc/sys/vm/drop_caches".

drop_pagecache_sb() will happily free all pages that aren't marked dirty if
there are no active mapping.  Later when application remaps the hugetlb
file back and all data are gone, triggering catastrophic flip over on
application.

Not only that, the internal resv_huge_pages count will also get all messed
up.  Fix it up by marking page dirty appropriately.

Signed-off-by: Ken Chen <kenchen@google.com>
Cc: "Nish Aravamudan" <nish.aravamudan@gmail.com>
Cc: Adam Litke <agl@us.ibm.com>
Cc: David Gibson <david@gibson.dropbear.id.au>
Cc: William Lee Irwin III <wli@holomorphy.com>
Cc: <stable@kernel.org>
Cc: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-02-09 09:25:46 -08:00
..
allocpercpu.c [PATCH] Allow NULL pointers in percpu_free 2006-12-07 08:39:22 -08:00
backing-dev.c [PATCH] separate bdi congestion functions from queue congestion functions 2006-10-20 10:26:35 -07:00
bootmem.c [PATCH] remove EXPORT_UNUSED_SYMBOL'ed symbols 2006-12-07 08:39:44 -08:00
bounce.c [PATCH] blktrace: only add a bounce trace when we really bounce 2007-01-12 10:46:49 -08:00
fadvise.c [PATCH] mm: change uses of f_{dentry,vfsmnt} to use f_path 2006-12-08 08:28:43 -08:00
filemap_xip.c [PATCH] mm: mremap correct rmap accounting 2007-01-30 08:33:32 -08:00
filemap.c [PATCH] mm: remove find_trylock_page 2007-02-09 08:06:14 -08:00
filemap.h Remove all inclusions of <linux/config.h> 2006-10-04 03:38:54 -04:00
fremap.c [PATCH] mm: more rmap debugging 2006-12-22 08:55:49 -08:00
highmem.c [PATCH] BLOCK: Separate the bounce buffering code from the highmem code [try #6] 2006-09-30 20:32:11 +02:00
hugetlb.c [PATCH] hugetlb: preserve hugetlb pte dirty state 2007-02-09 09:25:46 -08:00
internal.h [PATCH] mm: VM_BUG_ON 2006-09-26 08:48:44 -07:00
Kconfig Fix "can not" in Documentation and Kconfig 2006-10-03 22:53:09 +02:00
madvise.c [PATCH] Fix MADV_REMOVE protection checking 2006-04-17 18:22:18 -07:00
Makefile [PATCH] separate bdi congestion functions from queue congestion functions 2006-10-20 10:26:35 -07:00
memory_hotplug.c [PATCH] Fix sparsemem on Cell 2007-01-11 18:18:20 -08:00
memory.c [PATCH] i386 vDSO: use VM_ALWAYSDUMP 2007-01-26 13:50:58 -08:00
mempolicy.c [PATCH] mbind: restrict nodes to the currently allowed cpuset 2007-01-23 07:52:06 -08:00
mempool.c [PATCH] dm: work around mempool_alloc, bio_alloc_bioset deadlocks 2006-09-01 11:39:09 -07:00
migrate.c [PATCH] radix-tree: RCU lockless readside 2006-12-07 08:39:25 -08:00
mincore.c [PATCH] sys_mincore: s/max/min/ 2006-12-17 10:21:53 -08:00
mlock.c [PATCH] mlock cleanup 2006-12-07 08:39:22 -08:00
mmap.c [PATCH] Don't allow the stack to grow into hugetlb reserved regions 2007-01-30 16:01:35 -08:00
mmzone.c [PATCH] remove EXPORT_UNUSED_SYMBOL'ed symbols 2006-12-07 08:39:44 -08:00
mprotect.c [PATCH] paravirt: lazy mmu mode hooks.patch 2006-10-01 00:39:33 -07:00
mremap.c [PATCH] mm: mremap correct rmap accounting 2007-01-30 08:33:32 -08:00
msync.c [PATCH] mm: msync() cleanup 2006-09-26 08:48:45 -07:00
nommu.c [PATCH] struct path: convert mm 2006-12-08 08:28:47 -08:00
oom_kill.c [PATCH] fix OOM killing of swapoff 2007-01-05 23:55:29 -08:00
page_alloc.c Revert "[PATCH] mm: micro optimise zone_watermark_ok" 2007-01-31 16:46:40 -08:00
page_io.c [PATCH] swsusp: use block device offsets to identify swap locations 2006-12-07 08:39:27 -08:00
page-writeback.c Fix balance_dirty_page() calculations with CONFIG_HIGHMEM 2007-01-29 16:37:38 -08:00
pdflush.c [PATCH] Add include/linux/freezer.h and move definitions from sched.h 2006-12-07 08:39:27 -08:00
prio_tree.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
readahead.c [PATCH] io-accounting-read-accounting nfs fix 2006-12-10 09:55:41 -08:00
rmap.c [PATCH] page_mkclean_one(): fix call to set_pte_at() 2006-12-30 10:56:42 -08:00
shmem_acl.c [PATCH] Fix typos in mm/shmem_acl.c 2006-10-11 11:14:23 -07:00
shmem.c [PATCH] Fix for shmem_truncate_range() BUG_ON() 2006-12-22 08:55:47 -08:00
slab.c [PATCH] fix BUG_ON(!PageSlab) from fallback_alloc 2007-01-05 23:55:23 -08:00
slob.c [PATCH] MM: SLOB is broken by recent cleanup of slab.h 2006-12-30 10:56:42 -08:00
sparse.c [PATCH] numa node ids are int, page_to_nid and zone_to_nid should return int 2006-12-07 08:39:23 -08:00
swap_state.c [PATCH] lockdep: locking init debugging improvement 2006-07-03 15:27:02 -07:00
swap.c [PATCH] hotplug CPU: clean up hotcpu_notifier() use 2006-12-07 08:39:39 -08:00
swapfile.c [PATCH] swsusp: Do not fail if resume device is not set 2007-01-05 23:55:22 -08:00
thrash.c [PATCH] make mm/thrash.c:global_faults static 2006-12-07 08:39:22 -08:00
tiny-shmem.c [PATCH] struct path: convert mm 2006-12-08 08:28:47 -08:00
truncate.c [PATCH] MM: Remove [PATCH] invalidate_inode_pages2_range() debug 2007-01-26 13:51:00 -08:00
util.c [PATCH] slab: clean up leak tracking ifdefs a little bit 2006-10-04 07:55:13 -07:00
vmalloc.c [PATCH] Fix strange size check in __get_vm_area_node() 2006-11-16 11:43:38 -08:00
vmscan.c [PATCH] shrink_all_memory(): fix lru_pages handling 2007-01-05 23:55:29 -08:00
vmstat.c [PATCH] struct seq_operations and struct file_operations constification 2006-12-07 08:39:46 -08:00