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Doug Berger 439c79ed77 mm/cma.c: fail if fixed declaration can't be honored 
[ Upstream commit c633324e311243586675e732249339685e5d6faa ]

The description of cma_declare_contiguous() indicates that if the
'fixed' argument is true the reserved contiguous area must be exactly at
the address of the 'base' argument.

However, the function currently allows the 'base', 'size', and 'limit'
arguments to be silently adjusted to meet alignment constraints.  This
commit enforces the documented behavior through explicit checks that
return an error if the region does not fit within a specified region.

Link: http://lkml.kernel.org/r/1561422051-16142-1-git-send-email-opendmb@gmail.com
Fixes: 5ea3b1b2f8 ("cma: add placement specifier for "cma=" kernel parameter")
Signed-off-by: Doug Berger <opendmb@gmail.com>
Acked-by: Michal Nazarewicz <mina86@mina86.com>
Cc: Yue Hu <huyue2@yulong.com>
Cc: Mike Rapoport <rppt@linux.ibm.com>
Cc: Laura Abbott <labbott@redhat.com>
Cc: Peng Fan <peng.fan@nxp.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2019-08-06 19:06:51 +02:00
..
kasan
kernel/memremap, kasan: make ZONE_DEVICE with work with KASAN
2018-08-17 16:20:30 -07:00
backing-dev.c
writeback: synchronize sync(2) against cgroup writeback membership switches
2019-03-05 17:58:50 +01:00
balloon_compaction.c
…
bootmem.c
docs/mm: bootmem: add overview documentation
2018-08-02 12:17:27 -06:00
cleancache.c
mm: use octal not symbolic permissions
2018-06-15 07:55:25 +09:00
cma_debug.c
mm/cma_debug.c: fix the break condition in cma_maxchunk_get()
2019-06-15 11:54:01 +02:00
cma.c
mm/cma.c: fail if fixed declaration can't be honored
2019-08-06 19:06:51 +02:00
cma.h
…
compaction.c
mm: use octal not symbolic permissions
2018-06-15 07:55:25 +09:00
debug_page_ref.c
…
debug.c
mm: get rid of vmacache_flush_all() entirely
2018-09-13 15:18:04 -10:00
dmapool.c
mm: use octal not symbolic permissions
2018-06-15 07:55:25 +09:00
early_ioremap.c
…
fadvise.c
vfs: implement readahead(2) using POSIX_FADV_WILLNEED
2018-08-30 20:01:32 +02:00
failslab.c
mm: use octal not symbolic permissions
2018-06-15 07:55:25 +09:00
filemap.c
mm: add filemap_fdatawait_range_keep_errors()
2019-07-28 08:29:29 +02:00
frame_vector.c
…
frontswap.c
mm: use octal not symbolic permissions
2018-06-15 07:55:25 +09:00
gup_benchmark.c
mm/gup_benchmark: fix unsigned comparison to zero in __gup_benchmark_ioctl
2018-10-05 16:32:04 -07:00
gup.c
mm/gup.c: remove some BUG_ONs from get_gate_page()
2019-07-31 07:27:08 +02:00
highmem.c
…
hmm.c
mm, hmm: mark hmm_devmem_{add, add_resource} EXPORT_SYMBOL_GPL
2019-01-13 09:51:04 +01:00
huge_memory.c
mm/huge_memory: fix vmf_insert_pfn_{pmd, pud}() crash, handle unaligned addresses
2019-05-22 07:37:40 +02:00
hugetlb_cgroup.c
mm: rename page_counter's count/limit into usage/max
2018-06-07 17:34:35 -07:00
hugetlb.c
mm: hugetlb: soft-offline: dissolve_free_huge_page() return zero on !PageHuge
2019-07-03 13:14:45 +02:00
hwpoison-inject.c
…
init-mm.c
mm: Allocate the mm_cpumask (mm->cpu_bitmap[]) dynamically based on nr_cpu_ids
2018-07-17 09:35:30 +02:00
internal.h
mm: Change return type int to vm_fault_t for fault handlers
2018-08-23 18:48:44 -07:00
interval_tree.c
…
Kconfig
mm/hmm: select mmu notifier when selecting HMM
2019-06-15 11:54:00 +02:00
Kconfig.debug
mm: clarify CONFIG_PAGE_POISONING and usage
2018-08-22 10:52:44 -07:00
khugepaged.c
coredump: fix race condition between collapse_huge_page() and core dumping
2019-06-22 08:15:21 +02:00
kmemleak-test.c
…
kmemleak.c
mm/kmemleak.c: fix check for softirq context
2019-07-31 07:27:08 +02:00
ksm.c
include/linux/compiler*.h: make compiler-*.h mutually exclusive
2018-08-22 17:31:34 -07:00
list_lru.c
mm/list_lru.c: fix memory leak in __memcg_init_list_lru_node
2019-06-19 08:17:59 +02:00
maccess.c
…
madvise.c
mm: madvise(MADV_DODUMP): allow hugetlbfs pages
2018-10-05 16:32:05 -07:00
Makefile
vfs: implement readahead(2) using POSIX_FADV_WILLNEED
2018-08-30 20:01:32 +02:00
memblock.c
mm/memblock.c: replace u64 with phys_addr_t where appropriate
2018-08-17 16:20:30 -07:00
memcontrol.c
mm: writeback: use exact memcg dirty counts
2019-04-17 08:38:51 +02:00
memfd.c
alloc_file(): switch to passing O_... flags instead of FMODE_... mode
2018-07-12 10:02:57 -04:00
memory_hotplug.c
mm/memory_hotplug.c: drop memory device reference after find_memory_block()
2019-05-16 19:41:25 +02:00
memory-failure.c
mm: hugetlb: soft-offline: dissolve_free_huge_page() return zero on !PageHuge
2019-07-03 13:14:45 +02:00
memory.c
mm: use down_read_killable for locking mmap_sem in access_remote_vm
2019-07-31 07:27:09 +02:00
mempolicy.c
mm/mempolicy.c: fix an incorrect rebind node in mpol_rebind_nodemask
2019-07-03 13:14:44 +02:00
mempool.c
mm/mempool.c: add missing parameter description
2018-08-22 10:52:44 -07:00
memtest.c
…
migrate.c
mm/migrate.c: add missing flush_dcache_page for non-mapped page migrate
2019-04-03 06:26:28 +02:00
mincore.c
mm/mincore.c: make mincore() more conservative
2019-05-22 07:37:40 +02:00
mlock.c
mm/mlock.c: change count_mm_mlocked_page_nr return type
2019-07-10 09:53:40 +02:00
mm_init.c
mm: access zone->node via zone_to_nid() and zone_set_nid()
2018-08-22 10:52:45 -07:00
mmap.c
coredump: fix race condition between mmget_not_zero()/get_task_mm() and core dumping
2019-04-27 09:36:37 +02:00
mmu_context.c
…
mmu_notifier.c
mm/mmu_notifier: use hlist_add_head_rcu()
2019-07-31 07:27:08 +02:00
mmzone.c
…
mprotect.c
x86/speculation/l1tf: Disallow non privileged high MMIO PROT_NONE mappings
2018-06-20 19:10:01 +02:00
mremap.c
mremap: properly flush TLB before releasing the page
2018-10-18 11:30:52 +02:00
msync.c
…
nobootmem.c
mm/memblock: add a name for memblock flags enumeration
2018-08-02 12:17:27 -06:00
nommu.c
mm: use down_read_killable for locking mmap_sem in access_remote_vm
2019-07-31 07:27:09 +02:00
oom_kill.c
mm,oom: don't kill global init via memory.oom.group
2019-04-05 22:32:58 +02:00
page_alloc.c
mem-hotplug: fix node spanned pages when we have a node with only ZONE_MOVABLE
2019-06-15 11:54:00 +02:00
page_counter.c
memcg: introduce memory.min
2018-06-07 17:34:36 -07:00
page_ext.c
mm/page_ext.c: fix an imbalance with kmemleak
2019-04-05 22:32:58 +02:00
page_idle.c
mm/page_idle.c: fix oops because end_pfn is larger than max_pfn
2019-07-03 13:14:45 +02:00
page_io.c
swap,blkcg: issue swap io with the appropriate context
2018-07-09 09:07:54 -06:00
page_isolation.c
mm, migrate: remove reason argument from new_page_t
2018-04-11 10:28:32 -07:00
page_owner.c
mm: use octal not symbolic permissions
2018-06-15 07:55:25 +09:00
page_poison.c
page_poison: play nicely with KASAN
2019-04-05 22:32:59 +02:00
page_vma_mapped.c
mm/rmap: map_pte() was not handling private ZONE_DEVICE page properly
2018-11-13 11:08:46 -08:00
page-writeback.c
mm/page-writeback.c: don't break integrity writeback on ->writepage() error
2019-01-26 09:32:43 +01:00
pagewalk.c
…
percpu-internal.h
…
percpu-km.c
percpu: convert spin_lock_irq to spin_lock_irqsave.
2019-02-12 19:47:12 +01:00
percpu-stats.c
treewide: Use array_size() in vmalloc()
2018-06-12 16:19:22 -07:00
percpu-vm.c
…
percpu.c
percpu: do not search past bitmap when allocating an area
2019-06-15 11:54:11 +02:00
pgtable-generic.c
…
process_vm_access.c
…
quicklist.c
…
readahead.c
vfs: implement readahead(2) using POSIX_FADV_WILLNEED
2018-08-30 20:01:32 +02:00
rmap.c
mm: page_mkclean vs MADV_DONTNEED race
2019-06-15 11:54:01 +02:00
rodata_test.c
…
shmem.c
tmpfs: fix uninitialized return value in shmem_link
2019-03-23 20:09:52 +01:00
slab_common.c
mm: add support for kmem caches in DMA32 zone
2019-04-03 06:26:28 +02:00
slab.c
mm/slab.c: fix an infinite loop in leaks_show()
2019-06-15 11:54:01 +02:00
slab.h
mm: add support for kmem caches in DMA32 zone
2019-04-03 06:26:28 +02:00
slob.c
slab: __GFP_ZERO is incompatible with a constructor
2018-06-07 17:34:34 -07:00
slub.c
mm: add support for kmem caches in DMA32 zone
2019-04-03 06:26:28 +02:00
sparse-vmemmap.c
mm/sparse: delete old sparse_init and enable new one
2018-08-17 16:20:32 -07:00
sparse.c
mm/sparse: fix a bad comparison
2019-04-05 22:32:58 +02:00
swap_cgroup.c
…
swap_slots.c
mm, swap, get_swap_pages: use entry_size instead of cluster in parameter
2018-08-22 10:52:44 -07:00
swap_state.c
treewide: kvzalloc() -> kvcalloc()
2018-06-12 16:19:22 -07:00
swap.c
mm/swap: fix release_pages() when releasing devmap pages
2019-07-31 07:27:03 +02:00
swapfile.c
mm, swap: bounds check swap_info array accesses to avoid NULL derefs
2019-04-05 22:32:58 +02:00
truncate.c
mm: cleancache: fix corruption on missed inode invalidation
2018-12-05 19:32:13 +01:00
usercopy.c
mm/usercopy.c: no check page span for stack objects
2019-01-16 22:04:33 +01:00
userfaultfd.c
hugetlb: use same fault hash key for shared and private mappings
2019-05-22 07:37:40 +02:00
util.c
mm: page_mapped: don't assume compound page is huge or THP
2019-01-16 22:04:36 +01:00
vmacache.c
mm: get rid of vmacache_flush_all() entirely
2018-09-13 15:18:04 -10:00
vmalloc.c
mm/vmalloc.c: fix kernel BUG at mm/vmalloc.c:512!
2019-04-05 22:32:58 +02:00
vmpressure.c
mm/vmpressure.c: convert to use match_string() helper
2018-06-07 17:34:36 -07:00
vmscan.c
mm: vmscan: scan anonymous pages on file refaults
2019-07-28 08:29:30 +02:00
vmstat.c
mm/vmstat.c: fix /proc/vmstat format for CONFIG_DEBUG_TLBFLUSH=y CONFIG_SMP=n
2019-04-27 09:36:40 +02:00
workingset.c
mm/list_lru: introduce list_lru_shrink_walk_irq()
2018-08-17 16:20:32 -07:00
z3fold.c
z3fold: fix possible reclaim races
2018-12-01 09:37:33 +01:00
zbud.c
…
zpool.c
…
zsmalloc.c
mm/zsmalloc.c: make several functions and a struct static
2018-08-17 16:20:30 -07:00
zswap.c
zswap: re-check zswap_is_full() after do zswap_shrink()
2018-07-26 19:38:03 -07:00