zijun_hu e47608ab6d mm/memblock.c: fix NULL dereference error ...

It causes NULL dereference error and failure to get type_a->regions[0]
info if parameter type_b of __next_mem_range_rev() == NULL

Fix this by checking before dereferring and initializing idx_b to 0

The approach is tested by dumping all types of region via
__memblock_dump_all() and __next_mem_range_rev() fixed to UART
separately the result is okay after checking the logs.

Link: http://lkml.kernel.org/r/57A0320D.6070102@zoho.com
Signed-off-by: zijun_hu <zijun_hu@htc.com>
Tested-by: zijun_hu <zijun_hu@htc.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2016-08-04 20:02:09 -04:00

..

kasan

kasan: avoid overflowing quarantine size on low memory systems

2016-08-02 17:31:41 -04:00

backing-dev.c

mm, vmscan: move LRU lists to node

2016-07-28 16:07:41 -07:00

balloon_compaction.c

mm: balloon: use general non-lru movable page feature

2016-07-26 16:19:19 -07:00

bootmem.c

mm: convert printk(KERN_<LEVEL> to pr_<level>

2016-03-17 15:09:34 -07:00

cleancache.c

…

cma_debug.c

…

cma.c

mm/cma: silence warnings due to max() usage

2016-05-27 14:49:37 -07:00

cma.h

…

compaction.c

mm, compaction: simplify contended compaction handling

2016-07-28 16:07:41 -07:00

debug_page_ref.c

mm/page_ref: add tracepoint to track down page reference manipulation

2016-03-17 15:09:34 -07:00

debug.c

mm: introduce page reference manipulation functions

2016-03-17 15:09:34 -07:00

dmapool.c

mm: convert printk(KERN_<LEVEL> to pr_<level>

2016-03-17 15:09:34 -07:00

early_ioremap.c

…

fadvise.c

mm/fadvise.c: do not discard partial pages with POSIX_FADV_DONTNEED

2016-06-09 14:23:11 -07:00

failslab.c

mm: fault-inject take over bootstrap kmem_cache check

2016-03-15 16:55:16 -07:00

filemap.c

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse

2016-07-29 12:29:15 -07:00

frame_vector.c

…

frontswap.c

mm, frontswap: convert frontswap_enabled to static key

2016-07-26 16:19:19 -07:00

gup.c

Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

2016-08-02 16:11:27 -04:00

highmem.c

mm/highmem: make nr_free_highpages() handles all highmem zones by itself

2016-05-19 19:12:14 -07:00

huge_memory.c

mm, thp: remove __GFP_NORETRY from khugepaged and madvised allocations

2016-07-28 16:07:41 -07:00

hugetlb_cgroup.c

mm, hugetlb_cgroup: round limit_in_bytes down to hugepage size

2016-05-20 17:58:30 -07:00

hugetlb.c

mm, hugetlb: fix huge_pte_alloc BUG_ON

2016-08-02 17:31:41 -04:00

hwpoison-inject.c

…

init-mm.c

…

internal.h

mm, compaction: simplify contended compaction handling

2016-07-28 16:07:41 -07:00

interval_tree.c

…

Kconfig

mm: disable CONFIG_MEMORY_HOTPLUG when KASAN is enabled

2016-08-04 20:02:09 -04:00

Kconfig.debug

mm/page_ref: add tracepoint to track down page reference manipulation

2016-03-17 15:09:34 -07:00

khugepaged.c

mm, thp: remove __GFP_NORETRY from khugepaged and madvised allocations

2016-07-28 16:07:41 -07:00

kmemcheck.c

mm: convert printk(KERN_<LEVEL> to pr_<level>

2016-03-17 15:09:34 -07:00

kmemleak-test.c

mm: convert printk(KERN_<LEVEL> to pr_<level>

2016-03-17 15:09:34 -07:00

kmemleak.c

kmemleak: don't hang if user disables scanning early

2016-07-28 16:07:41 -07:00

ksm.c

mm: do not pass mm_struct into handle_mm_fault

2016-07-26 16:19:19 -07:00

list_lru.c

…

maccess.c

x86: remove more uaccess_32.h complexity

2016-05-22 17:21:27 -07:00

madvise.c

mm: make mmap_sem for write waits killable for mm syscalls

2016-05-23 17:04:14 -07:00

Makefile

thp: extract khugepaged from mm/huge_memory.c

2016-07-26 16:19:19 -07:00

memblock.c

mm/memblock.c: fix NULL dereference error

2016-08-04 20:02:09 -04:00

memcontrol.c

memcg: put soft limit reclaim out of way if the excess tree is empty

2016-08-02 17:31:41 -04:00

memory_hotplug.c

mem-hotplug: alloc new page from a nearest neighbor node when mem-offline

2016-07-28 16:07:41 -07:00

memory-failure.c

mm: hwpoison: remove incorrect comments

2016-07-28 16:07:41 -07:00

memory.c

mm: move swap-in anonymous page into active list

2016-08-02 17:31:41 -04:00

mempolicy.c

mm, vmscan: move LRU lists to node

2016-07-28 16:07:41 -07:00

mempool.c

Revert "mm, mempool: only set __GFP_NOMEMALLOC if there are free elements"

2016-07-28 16:07:41 -07:00

memtest.c

…

migrate.c

mm, thp: remove __GFP_NORETRY from khugepaged and madvised allocations

2016-07-28 16:07:41 -07:00

mincore.c

mm, fs: remove remaining PAGE_CACHE_* and page_cache_{get,release} usage

2016-04-04 10:41:08 -07:00

mlock.c

mm, vmscan: move LRU lists to node

2016-07-28 16:07:41 -07:00

mm_init.c

mm: convert printk(KERN_<LEVEL> to pr_<level>

2016-03-17 15:09:34 -07:00

mmap.c

mm: refuse wrapped vm_brk requests

2016-08-02 19:35:15 -04:00

mmu_context.c

mm/mmu_context, sched/core: Fix mmu_context.h assumption

2016-04-28 11:44:19 +02:00

mmu_notifier.c

fix Christoph's email addresses

2016-03-17 15:09:34 -07:00

mmzone.c

mm, page_alloc: inline the fast path of the zonelist iterator

2016-05-19 19:12:14 -07:00

mprotect.c

mm: thp: check pmd_trans_unstable() after split_huge_pmd()

2016-07-26 16:19:19 -07:00

mremap.c

mm: thp: check pmd_trans_unstable() after split_huge_pmd()

2016-07-26 16:19:19 -07:00

msync.c

…

nobootmem.c

mm: convert printk(KERN_<LEVEL> to pr_<level>

2016-03-17 15:09:34 -07:00

nommu.c

mm: introduce fault_env

2016-07-26 16:19:19 -07:00

oom_kill.c

mm, oom: tighten task_will_free_mem() locking

2016-07-28 16:07:41 -07:00

page_alloc.c

mm: initialise per_cpu_nodestats for all online pgdats at boot

2016-08-04 20:02:09 -04:00

page_counter.c

…

page_ext.c

mm: use early_pfn_to_nid in page_ext_init

2016-05-27 14:49:37 -07:00

page_idle.c

mm, vmscan: move lru_lock to the node

2016-07-28 16:07:41 -07:00

page_io.c

mm: add cond_resched() to generic_swapfile_activate()

2016-07-28 16:07:41 -07:00

page_isolation.c

mm/page_isolation: clean up confused code

2016-07-26 16:19:19 -07:00

page_owner.c

mm/page_owner: use stackdepot to store stacktrace

2016-07-26 16:19:19 -07:00

page_poison.c

mm: check the return value of lookup_page_ext for all call sites

2016-06-03 15:06:22 -07:00

page-writeback.c

mm: remove reclaim and compaction retry approximations

2016-07-28 16:07:41 -07:00

pagewalk.c

…

percpu-km.c

mm: percpu: use pr_fmt to prefix output

2016-03-17 15:09:34 -07:00

percpu-vm.c

…

percpu.c

percpu: fix synchronization between synchronous map extension and chunk destruction

2016-05-25 11:48:25 -04:00

pgtable-generic.c

mm/thp/migration: switch from flush_tlb_range to flush_pmd_tlb_range

2016-03-17 15:09:34 -07:00

process_vm_access.c

…

quicklist.c

fix Christoph's email addresses

2016-03-17 15:09:34 -07:00

readahead.c

mm, memcg: use consistent gfp flags during readahead

2016-07-26 16:19:19 -07:00

rmap.c

mm: move most file-based accounting to the node

2016-07-28 16:07:41 -07:00

shmem.c

shmem: Fix link error if huge pages support is disabled

2016-08-03 18:20:12 -04:00

slab_common.c

mm: charge/uncharge kmemcg from generic page allocator paths

2016-07-26 16:19:19 -07:00

slab.c

treewide: replace obsolete _refok by __ref

2016-08-02 17:31:41 -04:00

slab.h

mm, kasan: switch SLUB to stackdepot, enable memory quarantine for SLUB

2016-07-28 16:07:41 -07:00

slob.c

…

slub.c

slub: drop bogus inline for fixup_red_left()

2016-08-04 20:02:09 -04:00

sparse-vmemmap.c

treewide: replace obsolete _refok by __ref

2016-08-02 17:31:41 -04:00

sparse.c

treewide: replace obsolete _refok by __ref

2016-08-02 17:31:41 -04:00

swap_cgroup.c

mm: convert printk(KERN_<LEVEL> to pr_<level>

2016-03-17 15:09:34 -07:00

swap_state.c

mm: move most file-based accounting to the node

2016-07-28 16:07:41 -07:00

swap.c

mm, pagevec: release/reacquire lru_lock on pgdat change

2016-07-28 16:07:41 -07:00

swapfile.c

mm, frontswap: convert frontswap_enabled to static key

2016-07-26 16:19:19 -07:00

truncate.c

truncate: handle file thp

2016-07-26 16:19:19 -07:00

userfaultfd.c

mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros

2016-04-04 10:41:08 -07:00

util.c

mm: move most file-based accounting to the node

2016-07-28 16:07:41 -07:00

vmacache.c

…

vmalloc.c

mm: charge/uncharge kmemcg from generic page allocator paths

2016-07-26 16:19:19 -07:00

vmpressure.c

…

vmscan.c

mm: vmscan: fix memcg-aware shrinkers not called on global reclaim

2016-08-02 17:31:41 -04:00

vmstat.c

mm: remove reclaim and compaction retry approximations

2016-07-28 16:07:41 -07:00

workingset.c

mm, workingset: make working set detection node-aware

2016-07-28 16:07:41 -07:00

z3fold.c

mm/z3fold.c: avoid modifying HEADLESS page and minor cleanup

2016-06-03 16:02:55 -07:00

zbud.c

…

zpool.c

…

zsmalloc.c

zsmalloc: Delete an unnecessary check before the function call "iput"

2016-07-28 16:07:41 -07:00

zswap.c

mm/zswap: use workqueue to destroy pool

2016-05-20 17:58:30 -07:00