Zlatko Calusic ecccd1248d mm: fix null pointer dereference in wait_iff_congested() ...

An unintended consequence of commit 4ae0a48b5efc ("mm: modify
pgdat_balanced() so that it also handles order-0") is that
wait_iff_congested() can now be called with NULL 'struct zone *'
producing kernel oops like this:

  BUG: unable to handle kernel NULL pointer dereference
  IP: [<ffffffff811542d9>] wait_iff_congested+0x59/0x140

This trivial patch fixes it.

Reported-by: Zhouping Liu <zliu@redhat.com>
Reported-and-tested-by: Sedat Dilek <sedat.dilek@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Zlatko Calusic <zlatko.calusic@iskon.hr>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2012-12-28 08:42:39 -08:00

..

backing-dev.c

Revert "bdi: add a user-tunable cpu_list for the bdi flusher threads"

2012-12-17 11:29:09 -08:00

balloon_compaction.c

mm: introduce a common interface for balloon pages mobility

2012-12-11 17:22:26 -08:00

bootmem.c

mm/bootmem.c: remove unused wrapper function reserve_bootmem_generic()

2012-12-12 17:38:35 -08:00

bounce.c

bounce: allow use of bounce pool via config option

2012-07-18 16:40:35 -04:00

cleancache.c

…

compaction.c

compaction: fix build error in CMA && !COMPACTION

2012-12-20 17:40:18 -08:00

debug-pagealloc.c

…

dmapool.c

dmapool: make DMAPOOL_DEBUG detect corruption of free marker

2012-12-11 17:22:24 -08:00

fadvise.c

switch simple cases of fget_light to fdget

2012-09-26 22:20:08 -04:00

failslab.c

…

filemap_xip.c

mm: move all mmu notifier invocations to be done outside the PT lock

2012-10-09 16:22:58 +09:00

filemap.c

readahead: fault retry breaks mmap file read random detection

2012-10-09 16:22:47 +09:00

fremap.c

remap_file_pages: correctly handle the case of a NULL vm_ops pointer

2012-10-19 13:37:57 -07:00

frontswap.c

frontswap: support exclusive gets if tmem backend is capable

2012-09-21 10:38:12 -04:00

highmem.c

Some nice cleanups, and even a patch my wife did as a "live" demo for

2012-12-20 08:37:05 -08:00

huge_memory.c

mm: clean up transparent hugepage sysfs error messages

2012-12-20 17:40:20 -08:00

hugetlb_cgroup.c

mm/hugetlb: create hugetlb cgroup file in hugetlb_init

2012-12-18 15:02:15 -08:00

hugetlb.c

mm/hugetlb: create hugetlb cgroup file in hugetlb_init

2012-12-18 15:02:15 -08:00

hwpoison-inject.c

memcg: rename config variables

2012-07-31 18:42:43 -07:00

init-mm.c

…

internal.h

Automatic NUMA Balancing V11

2012-12-16 15:18:08 -08:00

interval_tree.c

mm: add CONFIG_DEBUG_VM_RB build option

2012-10-09 16:22:42 +09:00

Kconfig

memory-hotplug: document and enable CONFIG_MOVABLE_NODE

2012-12-18 15:02:12 -08:00

Kconfig.debug

…

kmemcheck.c

…

kmemleak-test.c

…

kmemleak.c

mm/kmemleak.c: remove obsolete simple_strtoul

2012-12-18 15:02:15 -08:00

ksm.c

ksm: make rmap walks more scalable

2012-12-20 07:06:56 -08:00

maccess.c

…

madvise.c

mm: prepare VM_DONTDUMP for using in drivers

2012-10-09 16:22:18 +09:00

Makefile

mm: introduce a common interface for balloon pages mobility

2012-12-11 17:22:26 -08:00

memblock.c

x86, mm: Trim memory in memblock to be page aligned

2012-10-24 11:52:21 -07:00

memcontrol.c

memcg: don't register hotcpu notifier from ->css_alloc()

2012-12-20 17:40:20 -08:00

memory_hotplug.c

mm/memory_hotplug.c: improve comments

2012-12-18 15:02:15 -08:00

memory-failure.c

Automatic NUMA Balancing V11

2012-12-16 15:18:08 -08:00

memory.c

mm: use kbasename()

2012-12-17 17:15:17 -08:00

mempolicy.c

Automatic NUMA Balancing V11

2012-12-16 15:18:08 -08:00

mempool.c

mempool: add @gfp_mask to mempool_create_node()

2012-06-25 11:53:47 +02:00

migrate.c

mm,numa: fix update_mmu_cache_pmd call

2012-12-17 19:37:03 -08:00

mincore.c

…

mlock.c

mm, thp: fix mlock statistics

2012-10-09 16:23:03 +09:00

mm_init.c

…

mmap.c

Automatic NUMA Balancing V11

2012-12-16 15:18:08 -08:00

mmu_context.c

…

mmu_notifier.c

mm/mmu_notifier: allocate mmu_notifier in advance

2012-10-25 14:37:53 -07:00

mmzone.c

memcg: fix hotplugged memory zone oops

2012-11-16 14:33:04 -08:00

mprotect.c

mm/mprotect.c: coding-style cleanups

2012-12-18 15:02:15 -08:00

mremap.c

Automatic NUMA Balancing V11

2012-12-16 15:18:08 -08:00

msync.c

…

nobootmem.c

mm: introduce new field "managed_pages" to struct zone

2012-12-12 17:38:34 -08:00

nommu.c

mm: export a function to get vm committed memory

2012-11-15 15:41:22 -08:00

oom_kill.c

mm, oom: remove redundant sleep in pagefault oom handler

2012-12-12 17:38:34 -08:00

page_alloc.c

mm: cma: WARN if freed memory is still in use

2012-12-20 17:40:19 -08:00

page_cgroup.c

memcontrol: use N_MEMORY instead N_HIGH_MEMORY

2012-12-12 17:38:32 -08:00

page_io.c

mm: add support for direct_IO to highmem pages

2012-07-31 18:42:47 -07:00

page_isolation.c

memory-hotplug: skip HWPoisoned page when offlining pages

2012-12-11 17:22:22 -08:00

page-writeback.c

mm: fix calculation of dirtyable memory

2012-12-20 17:40:18 -08:00

pagewalk.c

thp: change split_huge_page_pmd() interface

2012-12-12 17:38:31 -08:00

percpu-km.c

…

percpu-vm.c

mm: fix kernel-doc warnings

2012-06-20 14:39:36 -07:00

percpu.c

mm, percpu: Make sure percpu_alloc early parameter has an argument

2012-12-02 06:23:04 -08:00

pgtable-generic.c

mm: Only flush the TLB when clearing an accessible pte

2012-12-11 14:28:34 +00:00

process_vm_access.c

…

quicklist.c

…

readahead.c

switch simple cases of fget_light to fdget

2012-09-26 22:20:08 -04:00

rmap.c

Automatic NUMA Balancing V11

2012-12-16 15:18:08 -08:00

shmem.c

lseek: the "whence" argument is called "whence"

2012-12-17 17:15:12 -08:00

slab_common.c

slab: propagate tunable values

2012-12-18 15:02:14 -08:00

slab.c

memcg: add comments clarifying aspects of cache attribute propagation

2012-12-18 15:02:15 -08:00

slab.h

slab: propagate tunable values

2012-12-18 15:02:14 -08:00

slob.c

sl[au]b: always get the cache from its page in kmem_cache_free()

2012-12-18 15:02:14 -08:00

slub.c

slub: drop mutex before deleting sysfs entry

2012-12-18 15:02:15 -08:00

sparse-vmemmap.c

…

sparse.c

memory-hotplug, mm/sparse.c: clear the memory to store struct page

2012-12-11 17:22:23 -08:00

swap_state.c

mm: add support for a filesystem to activate swap files and use direct_IO for writing swap pages

2012-07-31 18:42:47 -07:00

swap.c

mm: remove vma arg from page_evictable

2012-10-09 16:22:55 +09:00

swapfile.c

mm, oom: fix race when specifying a thread as the oom origin

2012-12-11 17:22:27 -08:00

truncate.c

mm: drop vmtruncate

2012-12-20 18:46:29 -05:00

util.c

Merge branch 'master' into for-next

2012-10-28 19:29:19 +01:00

vmalloc.c

mm: use IS_ENABLED(CONFIG_NUMA) instead of NUMA_BUILD

2012-12-11 17:22:22 -08:00

vmscan.c

mm: fix null pointer dereference in wait_iff_congested()

2012-12-28 08:42:39 -08:00

vmstat.c

Automatic NUMA Balancing V11

2012-12-16 15:18:08 -08:00