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Robin Murphy 676bd99178 dmapool: fix overflow condition in pool_find_page() 
If a DMA pool lies at the very top of the dma_addr_t range (as may
happen with an IOMMU involved), the calculated end address of the pool
wraps around to zero, and page lookup always fails.

Tweak the relevant calculation to be overflow-proof.

Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Sumit Semwal <sumit.semwal@linaro.org>
Cc: Sakari Ailus <sakari.ailus@iki.fi>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-10-01 21:42:35 -04:00
..
kasan
kasan: fix last shadow judgement in memory_is_poisoned_16()
2015-09-17 21:16:07 -07:00
backing-dev.c
Merge branch 'for-4.3/blkcg' of git://git.kernel.dk/linux-block
2015-09-10 18:56:14 -07:00
balloon_compaction.c
mm/balloon_compaction: fix deflation when compaction is disabled
2014-10-29 16:33:15 -07:00
bootmem.c
bootmem: avoid freeing to bootmem after bootmem is done
2015-09-08 15:35:28 -07:00
cleancache.c
cleancache: remove limit on the number of cleancache enabled filesystems
2015-04-14 16:49:03 -07:00
cma_debug.c
mm/cma_debug: correct size input to bitmap function
2015-07-17 16:39:54 -07:00
cma.c
mm/memblock: add extra "flags" to memblock to allow selection of memory based on attribute
2015-06-24 17:49:44 -07:00
cma.h
mm: cma: mark cma_bitmap_maxno() inline in header
2015-08-14 15:56:32 -07:00
compaction.c
mm/compaction: correct to flush migrated pages if pageblock skip happens
2015-09-08 15:35:28 -07:00
debug-pagealloc.c
mm/debug-pagealloc: make debug-pagealloc boottime configurable
2014-12-13 12:42:48 -08:00
debug.c
mm: introduce idle page tracking
2015-09-10 13:29:01 -07:00
dmapool.c
dmapool: fix overflow condition in pool_find_page()
2015-10-01 21:42:35 -04:00
early_ioremap.c
mm/early_ioremap: add explicit #include of asm/early_ioremap.h
2015-09-11 15:21:34 -07:00
fadvise.c
writeback: implement and use inode_congested()
2015-06-02 08:33:35 -06:00
failslab.c
…
filemap.c
mm: rename alloc_pages_exact_node() to __alloc_pages_node()
2015-09-08 15:35:28 -07:00
frame_vector.c
[media] mm: Provide new get_vaddr_frames() helper
2015-08-16 13:02:47 -03:00
frontswap.c
frontswap: allow multiple backends
2015-06-24 17:49:45 -07:00
gup.c
mm: make GUP handle pfn mapping unless FOLL_GET is requested
2015-09-04 16:54:41 -07:00
highmem.c
mm/highmem: make kmap cache coloring aware
2014-08-06 18:01:22 -07:00
huge_memory.c
mm: introduce idle page tracking
2015-09-10 13:29:01 -07:00
hugetlb_cgroup.c
mm: page_counter: pull "-1" handling out of page_counter_memparse()
2015-02-11 17:06:02 -08:00
hugetlb.c
mm: hugetlbfs: skip shared VMAs when unmapping private pages to satisfy a fault
2015-10-01 21:42:35 -04:00
hwpoison-inject.c
hwpoison: use page_cgroup_ino for filtering by memcg
2015-09-10 13:29:01 -07:00
init-mm.c
…
internal.h
mm/compaction: correct to flush migrated pages if pageblock skip happens
2015-09-08 15:35:28 -07:00
interval_tree.c
mm: replace vma->sharead.linear with vma->shared
2015-02-10 14:30:31 -08:00
Kconfig
media updates for v4.3-rc1
2015-09-11 16:42:39 -07:00
Kconfig.debug
mm/debug_pagealloc: remove obsolete Kconfig options
2015-01-08 15:10:52 -08:00
kmemcheck.c
mm/slab_common: move kmem_cache definition to internal header
2014-10-09 22:25:50 -04:00
kmemleak-test.c
mm/kmemleak-test.c: use pr_fmt for logging
2014-06-06 16:08:18 -07:00
kmemleak.c
kmemleak: use seq_hex_dump() to dump buffers
2015-09-10 13:29:01 -07:00
ksm.c
mm: remove rest of ACCESS_ONCE() usages
2015-04-15 16:35:18 -07:00
list_lru.c
list_lru: don't call list_lru_from_kmem if the list_head is empty
2015-09-08 15:35:28 -07:00
maccess.c
lib: move strncpy_from_unsafe() into mm/maccess.c
2015-08-31 12:36:10 -07:00
madvise.c
mm: madvise allow remove operation for hugetlbfs
2015-09-08 15:35:28 -07:00
Makefile
media updates for v4.3-rc1
2015-09-11 16:42:39 -07:00
memblock.c
mm/memblock.c: fix comment in __next_mem_range()
2015-09-08 15:35:28 -07:00
memcontrol.c
memcg: remove pcp_counter_lock
2015-10-01 21:42:35 -04:00
memory_hotplug.c
libnvdimm for 4.3:
2015-09-08 14:35:59 -07:00
memory-failure.c
hwpoison: use page_cgroup_ino for filtering by memcg
2015-09-10 13:29:01 -07:00
memory.c
mm: use vma_is_anonymous() in create_huge_pmd() and wp_huge_pmd()
2015-09-10 13:29:01 -07:00
mempolicy.c
mm: rename alloc_pages_exact_node() to __alloc_pages_node()
2015-09-08 15:35:28 -07:00
mempool.c
mm/mempool: allow NULL `pool' pointer in mempool_destroy()
2015-09-08 15:35:28 -07:00
memtest.c
memtest: remove unused header files
2015-09-08 15:35:28 -07:00
migrate.c
memcg: fix dirty page migration
2015-10-01 21:42:35 -04:00
mincore.c
mincore: apply page table walker on do_mincore()
2015-02-11 17:06:06 -08:00
mlock.c
userfaultfd: teach vma_merge to merge across vma->vm_userfaultfd_ctx
2015-09-04 16:54:41 -07:00
mm_init.c
mm: meminit: remove mminit_verify_page_links
2015-06-30 19:44:56 -07:00
mmap.c
mm, dax: VMA with vm_ops->pfn_mkwrite wants to be write-notified
2015-09-22 15:09:53 -07:00
mmu_context.c
…
mmu_notifier.c
mmu-notifier: add clear_young callback
2015-09-10 13:29:01 -07:00
mmzone.c
mm: microoptimize zonelist operations
2015-02-11 17:06:02 -08:00
mprotect.c
userfaultfd: teach vma_merge to merge across vma->vm_userfaultfd_ctx
2015-09-04 16:54:41 -07:00
mremap.c
mremap: simplify the "overlap" check in mremap_to()
2015-09-04 16:54:41 -07:00
msync.c
mm: remove rest usage of VM_NONLINEAR and pte_file()
2015-02-10 14:30:31 -08:00
nobootmem.c
mm: page_alloc: pass PFN to __free_pages_bootmem
2015-06-30 19:44:55 -07:00
nommu.c
mm, mpx: add "vm_flags_t vm_flags" arg to do_mmap_pgoff()
2015-09-10 13:29:01 -07:00
oom_kill.c
mm, oom: remove unnecessary variable
2015-09-08 15:35:28 -07:00
page_alloc.c
Merge branch 'akpm' (patches from Andrew)
2015-09-08 17:52:23 -07:00
page_counter.c
mm: page_counter: pull "-1" handling out of page_counter_memparse()
2015-02-11 17:06:02 -08:00
page_ext.c
mm: introduce idle page tracking
2015-09-10 13:29:01 -07:00
page_idle.c
mm: introduce idle page tracking
2015-09-10 13:29:01 -07:00
page_io.c
fs: use helper bio_add_page() instead of open coding on bi_io_vec
2015-08-13 12:32:00 -06:00
page_isolation.c
mm, page_isolation: make set/unset_migratetype_isolate() file-local
2015-09-08 15:35:28 -07:00
page_owner.c
mm/page_owner: set correct gfp_mask on page_owner
2015-07-17 16:39:54 -07:00
page-writeback.c
Merge branch 'for-4.3/blkcg' of git://git.kernel.dk/linux-block
2015-09-10 18:56:14 -07:00
pagewalk.c
mm/pagewalk.c: prevent positive return value of walk_page_test() from being passed to callers
2015-03-25 16:20:30 -07:00
percpu-km.c
percpu: implmeent pcpu_nr_empty_pop_pages and chunk->nr_populated
2014-09-02 14:46:05 -04:00
percpu-vm.c
percpu: move region iterations out of pcpu_[de]populate_chunk()
2014-09-02 14:46:02 -04:00
percpu.c
percpu: clean up of schunk->map[] assignment in pcpu_setup_first_chunk
2015-07-21 11:31:00 -04:00
pgtable-generic.c
mm: clarify that the function operates on hugepage pte
2015-06-24 17:49:44 -07:00
process_vm_access.c
process_vm_access: switch to {compat_,}import_iovec()
2015-04-11 22:27:12 -04:00
quicklist.c
…
readahead.c
writeback: implement and use inode_congested()
2015-06-02 08:33:35 -06:00
rmap.c
mm: introduce idle page tracking
2015-09-10 13:29:01 -07:00
shmem.c
shmem: recalculate file inode when fstat
2015-09-08 15:35:28 -07:00
slab_common.c
memcg: export struct mem_cgroup
2015-09-08 15:35:28 -07:00
slab.c
mm/slab: fix unexpected index mapping result of kmalloc_size(INDEX_NODE+1)
2015-10-01 21:42:35 -04:00
slab.h
mm/slab.h: fix argument order in cache_from_obj's error message
2015-09-04 16:54:41 -07:00
slob.c
mm: rename alloc_pages_exact_node() to __alloc_pages_node()
2015-09-08 15:35:28 -07:00
slub.c
mm: rename alloc_pages_exact_node() to __alloc_pages_node()
2015-09-08 15:35:28 -07:00
sparse-vmemmap.c
…
sparse.c
…
swap_cgroup.c
mm: page_cgroup: rename file to mm/swap_cgroup.c
2014-12-10 17:41:09 -08:00
swap_state.c
mm: swap: zswap: maybe_preload & refactoring
2015-09-08 15:35:28 -07:00
swap.c
mm: introduce idle page tracking
2015-09-10 13:29:01 -07:00
swapfile.c
mm: /proc/pid/smaps:: show proportional swap share of the mapping
2015-09-08 15:35:28 -07:00
truncate.c
memcg: add per cgroup dirty page accounting
2015-06-02 08:33:33 -06:00
userfaultfd.c
userfaultfd: avoid mmap_sem read recursion in mcopy_atomic
2015-09-04 16:54:41 -07:00
util.c
mm: uninline and cleanup page-mapping related helpers
2015-04-15 16:35:19 -07:00
vmacache.c
mm,vmacache: count number of system-wide flushes
2014-12-13 12:42:48 -08:00
vmalloc.c
mm/vmalloc: get rid of dirty bitmap inside vmap_block structure
2015-04-15 16:35:18 -07:00
vmpressure.c
mm/vmpressure.c: fix race in vmpressure_work_fn()
2014-12-02 17:32:07 -08:00
vmscan.c
vmscan: fix sane_reclaim helper for legacy memcg
2015-09-22 15:09:53 -07:00
vmstat.c
vmstat: Reduce time interval to stat update on idle cpu
2015-02-11 17:06:07 -08:00
workingset.c
list_lru: add helpers to isolate items
2015-02-12 18:54:10 -08:00
zbud.c
mm: zbud: constify the zbud_ops
2015-09-08 15:35:28 -07:00
zpool.c
zpool: add zpool_has_pool()
2015-09-10 13:29:01 -07:00
zsmalloc.c
mm: zpool: constify the zpool_ops
2015-09-08 15:35:28 -07:00
zswap.c
zswap: change zpool/compressor at runtime
2015-09-10 13:29:01 -07:00