Dave Hansen 2209ffb965 hugetlb: fix resv_map leak in error path ... commit c50ac05081 and 4523e14585 upstream. When called for anonymous (non-shared) mappings, hugetlb_reserve_pages() does a resv_map_alloc(). It depends on code in hugetlbfs's vm_ops->close() to release that allocation. However, in the mmap() failure path, we do a plain unmap_region() without the remove_vma() which actually calls vm_ops->close(). This is a decent fix. This leak could get reintroduced if new code (say, after hugetlb_reserve_pages() in hugetlbfs_file_mmap()) decides to return an error. But, I think it would have to unroll the reservation anyway. Christoph's test case: http://marc.info/?l=linux-mm&m=133728900729735 This patch applies to 3.4 and later. A version for earlier kernels is at https://lkml.org/lkml/2012/5/22/418. Signed-off-by: Dave Hansen <dave@linux.vnet.ibm.com> Acked-by: Mel Gorman <mel@csn.ul.ie> Acked-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Reported-by: Christoph Lameter <cl@linux.com> Tested-by: Christoph Lameter <cl@linux.com> Cc: Andrea Arcangeli <aarcange@redhat.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>		2012-06-17 11:23:13 -07:00
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backing-dev.c	backing-dev: ensure wakeup_timer is deleted	2011-11-21 14:31:25 -08:00
bootmem.c	bootmem/sparsemem: remove limit constraint in alloc_bootmem_section	2012-04-02 09:27:11 -07:00
bounce.c	bounce: call flush_dcache_page() after bounce_copy_vec()	2010-09-09 18:57:25 -07:00
cleancache.c	mm: cleancache core ops functions and config	2011-05-26 10:01:36 -06:00
compaction.c	mm: compaction: check for overlapping nodes during isolation for migration	2012-02-13 11:06:11 -08:00
debug-pagealloc.c
dmapool.c	mm/dmapool.c: use TASK_UNINTERRUPTIBLE in dma_pool_alloc()	2011-01-13 17:32:48 -08:00
fadvise.c	readahead: introduce FMODE_RANDOM for POSIX_FADV_RANDOM	2010-03-06 11:26:25 -08:00
failslab.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
filemap_xip.c	mm/filemap_xip.c: fix race condition in xip_file_fault()	2012-02-13 11:06:07 -08:00
filemap.c	readahead: fix pipeline break caused by block plug	2012-02-13 11:06:04 -08:00
fremap.c	mm: don't access vm_flags as 'int'	2011-05-26 09:20:31 -07:00
highmem.c	mm,x86: fix kmap_atomic_push vs ioremap_32.c	2010-10-27 18:03:05 -07:00
huge_memory.c	mm: thp: fix BUG on mm->nr_ptes	2012-03-12 10:32:56 -07:00
hugetlb.c	hugetlb: fix resv_map leak in error path	2012-06-17 11:23:13 -07:00
hwpoison-inject.c	Fix common misspellings	2011-03-31 11:26:23 -03:00
init-mm.c	mm: convert mm->cpu_vm_cpumask into cpumask_var_t	2011-05-25 08:39:21 -07:00
internal.h	mm: thp: tail page refcounting fix	2011-11-11 09:36:29 -08:00
Kconfig	mm: cleancache core ops functions and config	2011-05-26 10:01:36 -06:00
Kconfig.debug	mm: debug-pagealloc: fix kconfig dependency warning	2011-03-22 17:44:02 -07:00
kmemcheck.c	kmemcheck: Fix build errors due to missing slab.h	2010-03-30 22:02:32 +09:00
kmemleak-test.c	kmemleak: remove memset by using kzalloc	2011-01-27 18:31:51 +00:00
kmemleak.c	kmemleak: Do not return a pointer to an object that kmemleak did not get	2011-05-19 17:35:28 +01:00
ksm.c	ksm: fix NULL pointer dereference in scan_get_next_rmap_item()	2011-06-15 20:04:02 -07:00
maccess.c	maccess,probe_kernel: Make write/read src const void *	2011-05-25 19:56:23 -04:00
madvise.c	thp: khugepaged: make khugepaged aware about madvise	2011-01-13 17:32:47 -08:00
Makefile	mm: cleancache core ops functions and config	2011-05-26 10:01:36 -06:00
memblock.c	mm/memblock: properly handle overlaps and fix error path	2011-03-22 17:44:09 -07:00
memcontrol.c	memcg: free spare array to avoid memory leak	2012-05-21 09:40:04 -07:00
memory_hotplug.c	mm, hotplug: protect zonelist building with zonelists_mutex	2011-06-22 21:06:48 -07:00
memory-failure.c	mm/memory-failure.c: fix spinlock vs mutex order	2011-06-27 18:00:13 -07:00
memory.c	mm: thp: fix pmd_bad() triggering in code paths holding mmap_sem read mode	2012-04-02 09:27:10 -07:00
mempolicy.c	mm: mempolicy: Let vma_merge and vma_split handle vma->vm_policy linkages	2012-06-01 15:12:56 +08:00
mempool.c	mm: remove broken 'kzalloc' mempool	2009-09-22 07:17:35 -07:00
migrate.c	mm: fix race between mremap and removing migration entry	2011-10-25 07:10:17 +02:00
mincore.c	mm: thp: fix pmd_bad() triggering in code paths holding mmap_sem read mode	2012-04-02 09:27:10 -07:00
mlock.c	mm: don't access vm_flags as 'int'	2011-05-26 09:20:31 -07:00
mm_init.c
mmap.c	mm: get rid of the most spurious find_vma_prev() users	2011-06-16 00:35:09 -07:00
mmu_context.c	exit: fix oops in sync_mm_rss	2010-03-24 16:31:21 -07:00
mmu_notifier.c	thp: mmu_notifier_test_young	2011-01-13 17:32:46 -08:00
mmzone.c	mm: page allocator: adjust the per-cpu counter threshold when memory is low	2011-01-13 17:32:31 -08:00
mprotect.c	thp: mprotect: transparent huge page support	2011-01-13 17:32:44 -08:00
mremap.c	mm: Convert i_mmap_lock to a mutex	2011-05-25 08:39:18 -07:00
msync.c	sanitize vfs_fsync calling conventions	2010-05-21 18:31:21 -04:00
nobootmem.c	mm: nobootmem: fix sign extend problem in __free_pages_memory()	2012-05-21 09:40:02 -07:00
nommu.c	NOMMU: Don't need to clear vm_mm when deleting a VMA	2012-03-12 10:32:56 -07:00
oom_kill.c	oom: fix integer overflow of points in oom_badness	2012-01-06 14:13:51 -08:00
page_alloc.c	mm: fix NULL ptr dereference in __count_immobile_pages	2012-01-25 17:25:05 -08:00
page_cgroup.c	memcg: fix init_page_cgroup nid with sparsemem	2011-06-15 20:04:01 -07:00
page_io.c	block: kill off REQ_UNPLUG	2011-03-10 08:52:27 +01:00
page_isolation.c	mm: page_isolation: codeclean fix comment and rm unneeded val init	2010-10-26 16:52:11 -07:00
page-writeback.c	writeback: introduce .tagged_writepages for the WB_SYNC_NONE sync stage	2011-10-03 11:40:43 -07:00
pagewalk.c	mm: thp: fix pmd_bad() triggering in code paths holding mmap_sem read mode	2012-04-02 09:27:10 -07:00
percpu-km.c	percpu: clear memory allocated with the km allocator	2010-10-02 10:28:42 +03:00
percpu-vm.c	percpu: fix chunk range calculation	2011-12-21 12:57:37 -08:00
percpu.c	percpu: pcpu_embed_first_chunk() should free unused parts after all allocs are complete	2012-05-21 09:40:02 -07:00
pgtable-generic.c	mm/pgtable-generic.c: fix CONFIG_SWAP=n build	2011-01-26 10:49:58 +10:00
prio_tree.c	sanitize <linux/prefetch.h> usage	2011-05-20 12:50:29 -07:00
quicklist.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
readahead.c	readahead: readahead page allocations are OK to fail	2011-05-25 08:39:25 -07:00
rmap.c	mm/memory-failure.c: fix spinlock vs mutex order	2011-06-27 18:00:13 -07:00
shmem.c	tmpfs: add shmem_read_mapping_page_gfp	2011-06-27 18:00:12 -07:00
slab.c	SLAB: Record actual last user of freed objects.	2011-06-03 19:33:50 +03:00
slob.c	mm: Remove support for kmem_cache_name()	2011-01-23 21:00:05 +02:00
slub.c	slub: Do not hold slub_lock when calling sysfs_slab_add()	2012-04-02 09:27:20 -07:00
sparse-vmemmap.c	tree-wide: fix comment/printk typos	2010-11-01 15:38:34 -04:00
sparse.c	bootmem/sparsemem: remove limit constraint in alloc_bootmem_section	2012-04-02 09:27:11 -07:00
swap_state.c	mm: fix s390 BUG by __set_page_dirty_no_writeback on swap	2012-04-27 09:51:07 -07:00
swap.c	mm: fix UP THP spin_is_locked BUGs	2012-02-13 11:06:11 -08:00
swapfile.c	mm: thp: fix pmd_bad() triggering in code paths holding mmap_sem read mode	2012-04-02 09:27:10 -07:00
thrash.c	vmscan: implement swap token priority aging	2011-06-15 20:03:59 -07:00
truncate.c	mm: fix assertion mapping->nrpages == 0 in end_writeback()	2011-06-27 18:00:13 -07:00
util.c	mm: nommu: sort mm->mmap list properly	2011-05-25 08:39:05 -07:00
vmalloc.c	mm: fix faulty initialization in vmalloc_init()	2012-06-17 11:23:13 -07:00
vmscan.c	mm: consider all swapped back pages in used-once logic	2012-06-10 00:32:57 +09:00
vmstat.c	mm, mem-hotplug: update pcp->stat_threshold when memory hotplug occur	2011-05-25 08:39:09 -07:00