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David Gibson c7546f8f03 [PATCH] Fix hugepage crash on failing mmap() 
This patch fixes a crash in the hugepage code.  unmap_hugepage_area() was
assuming that (due to prefault) PTEs must exist for all the area in
question.  However, this may not be the case, if mmap() encounters an error
before the prefault and calls unmap_region() to clean up any partial
mapping.

Depending on the hugepage configuration, this crash can be triggered by an
unpriveleged user.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Cc: William Lee Irwin III <wli@holomorphy.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
 		2005-08-05 12:22:37 -07:00
..
Kconfig [PATCH] sparsemem memory model 2005-06-23 09:45:04 -07:00
Makefile [PATCH] xip: fs/mm: execute in place 2005-06-24 00:06:41 -07:00
bootmem.c [PATCH] Use ALIGN to remove duplicate code 2005-06-25 16:25:02 -07:00
fadvise.c [PATCH] xip: madvice/fadvice: execute in place 2005-06-24 00:06:42 -07:00
filemap.c [PATCH] fix for generic_file_write iov problem 2005-06-25 16:24:39 -07:00
filemap.h [PATCH] xip: reduce code duplication 2005-06-24 00:06:41 -07:00
filemap_xip.c [PATCH] execute-in-place fixes 2005-07-15 09:54:50 -07:00
fremap.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
highmem.c [PATCH] count bounce buffer pages in vmstat 2005-05-01 08:58:37 -07:00
hugetlb.c [PATCH] Fix hugepage crash on failing mmap() 2005-08-05 12:22:37 -07:00
internal.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
madvise.c [PATCH] madvise() does not always return -EBADF on non-file mapped area 2005-07-27 16:25:54 -07:00
memory.c Fix up recent get_user_pages() handling 2005-08-03 10:07:09 -07:00
mempolicy.c [PATCH] sys_set_mempolicy() doesnt check if mode < 0 2005-08-01 21:38:00 -07:00
mempool.c [PATCH] propagate __nocast annotations 2005-07-07 18:23:46 -07:00
mincore.c [PATCH] freepgt: sys_mincore ignore FIRST_USER_PGD_NR 2005-04-19 13:29:20 -07:00
mlock.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
mmap.c [PATCH] __vm_enough_memory() signedness fix 2005-08-04 21:43:14 -07:00
mprotect.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
mremap.c [PATCH] fix VmSize and VmData after mremap 2005-08-04 13:11:15 -07:00
msync.c [PATCH] msync: check pte dirty earlier 2005-06-21 18:46:21 -07:00
nommu.c [PATCH] __vm_enough_memory() signedness fix 2005-08-04 21:43:14 -07:00
oom_kill.c [PATCH] mm: quieten OOM killer noise 2005-07-07 18:23:36 -07:00
page-writeback.c [PATCH] rename wakeup_bdflush to wakeup_pdflush 2005-06-28 21:20:31 -07:00
page_alloc.c [PATCH] Fix NUMA node sizing in nr_free_zone_pages 2005-07-30 10:14:46 -07:00
page_io.c [PATCH] swsusp: kill config_pm_disk 2005-06-25 16:24:32 -07:00
pdflush.c [PATCH] Cleanup patch for process freezing 2005-06-25 17:10:13 -07:00
prio_tree.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
readahead.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
rmap.c [PATCH] xip: fs/mm: execute in place 2005-06-24 00:06:41 -07:00
shmem.c [PATCH] shmem: restore superblock info 2005-06-21 18:46:18 -07:00
slab.c [PATCH] propagate __nocast annotations 2005-07-07 18:23:46 -07:00
sparse.c [PATCH] sparsemem hotplug base 2005-06-23 09:45:05 -07:00
swap.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
swap_state.c [PATCH] mm: use __GFP_NOMEMALLOC 2005-05-01 08:58:37 -07:00
swapfile.c [PATCH] can_share_swap_page: use page_mapcount 2005-06-21 18:46:21 -07:00
thrash.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
tiny-shmem.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
truncate.c [PATCH] DocBook: fix some descriptions 2005-05-01 08:59:26 -07:00
vmalloc.c [PATCH] x86_64: Fixed guard page handling again in iounmap 2005-05-20 15:48:20 -07:00
vmscan.c [PATCH] rename wakeup_bdflush to wakeup_pdflush 2005-06-28 21:20:31 -07:00