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Doug Berger 6e48d75966 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 18:28:27 +02:00
..
kasan kasan: fix shadow_size calculation error in kasan_module_alloc 2018-08-24 13:26:58 +02:00
backing-dev.c writeback: synchronize sync(2) against cgroup writeback membership switches 2019-06-11 12:23:41 +02:00
balloon_compaction.c
bootmem.c
cleancache.c
cma.c mm/cma.c: fail if fixed declaration can't be honored 2019-08-06 18:28:27 +02:00
cma.h
cma_debug.c mm/cma_debug.c: fix the break condition in cma_maxchunk_get() 2019-06-22 08:18:18 +02:00
compaction.c mm/compaction: pass only pageblock aligned range to pageblock_pfn_to_page 2018-01-17 09:35:26 +01:00
debug-pagealloc.c mm, hwpoison: fixup "mm: check the return value of lookup_page_ext for all call sites" 2017-11-24 11:26:29 +01:00
debug.c mm: get rid of vmacache_flush_all() entirely 2018-09-19 22:49:00 +02:00
dmapool.c
early_ioremap.c mm/early_ioremap: Fix boot hang with earlyprintk=efi,keep 2018-02-25 11:03:41 +01:00
fadvise.c mm/fadvise.c: fix signed overflow UBSAN complaint 2018-09-15 09:40:38 +02:00
failslab.c
filemap.c mm: filemap: avoid unnecessary calls to lock_page when waiting for IO to complete during a read 2018-05-26 08:48:54 +02:00
frame_vector.c mm: replace get_vaddr_frames() write/force parameters with gup_flags 2018-12-17 21:55:16 +01:00
frontswap.c
gup.c proc: do not access cmdline nor environ from file-backed areas 2018-12-17 21:55:17 +01:00
highmem.c
huge_memory.c mremap: properly flush TLB before releasing the page 2018-11-10 07:41:42 -08:00
hugetlb.c hugetlbfs: on restore reserve error path retain subpool reservation 2019-06-22 08:18:17 +02:00
hugetlb_cgroup.c
hwpoison-inject.c
init-mm.c mm: Add a user_ns owner to mm_struct and fix ptrace permission checks 2017-01-06 11:16:11 +01:00
internal.h mm, mprotect: flush TLB if potentially racing with a parallel reclaim leaving stale TLB entries 2017-08-11 09:08:50 -07:00
interval_tree.c
Kconfig mm: don't allow deferred pages with NEED_PER_CPU_KM 2018-05-26 08:48:55 +02:00
Kconfig.debug
kmemcheck.c
kmemleak-test.c
kmemleak.c mm/kmemleak.c: fix check for softirq context 2019-08-04 09:34:59 +02:00
ksm.c mm/ksm: fix interaction with THP 2018-05-30 07:49:08 +02:00
list_lru.c mm/list_lru.c: fix memory leak in __memcg_init_list_lru_node 2019-06-22 08:18:22 +02:00
maccess.c
madvise.c mm: madvise(MADV_DODUMP): allow hugetlbfs pages 2018-10-10 08:52:11 +02:00
Makefile
memblock.c mm: consider memblock reservations for deferred memory initialization sizing 2017-06-14 13:16:26 +02:00
memcontrol.c mm: memcg: fix use after free in mem_cgroup_iter() 2018-07-25 10:18:16 +02:00
memory-failure.c hwpoison, memcg: forcibly uncharge LRU pages 2018-01-31 12:06:09 +01:00
memory.c mm: replace access_remote_vm() write parameter with gup_flags 2018-12-17 21:55:17 +01:00
memory_hotplug.c mm, memory_hotplug: test_pages_in_a_zone do not pass the end of zone 2019-03-23 08:44:26 +01:00
mempolicy.c mm: mempolicy: make mbind() return -EIO when MPOL_MF_STRICT is specified 2019-04-27 09:33:47 +02:00
mempool.c mm/mempool: avoid KASAN marking mempool poison checks as use-after-free 2017-08-12 19:29:09 -07:00
memtest.c
migrate.c hugetlbfs: fix races and page leaks during migration 2019-03-23 08:44:23 +01:00
mincore.c mm/mincore.c: make mincore() more conservative 2019-06-11 12:23:36 +02:00
mlock.c mm: mlock: avoid increase mm->locked_vm on mlock() when already mlock2(,MLOCK_ONFAULT) 2018-12-13 09:21:33 +01:00
mm_init.c
mmap.c coredump: fix race condition between mmget_not_zero()/get_task_mm() and core dumping 2019-06-22 08:18:27 +02:00
mmu_context.c mm/mmu_context, sched/core: Fix mmu_context.h assumption 2017-12-25 14:22:09 +01:00
mmu_notifier.c mm/mmu_notifier: use hlist_add_head_rcu() 2019-08-04 09:34:59 +02:00
mmzone.c
mprotect.c x86/speculation/l1tf: Disallow non privileged high MMIO PROT_NONE mappings 2018-08-15 17:42:10 +02:00
mremap.c mremap: properly flush TLB before releasing the page 2018-11-10 07:41:42 -08:00
msync.c
nobootmem.c
nommu.c mm: replace access_remote_vm() write parameter with gup_flags 2018-12-17 21:55:17 +01:00
oom_kill.c mm, oom: fix use-after-free in oom_kill_process 2019-02-06 19:43:07 +01:00
page-writeback.c mm/page-writeback.c: don't break integrity writeback on ->writepage() error 2019-01-26 09:42:55 +01:00
page_alloc.c mm, page_alloc: do not break __GFP_THISNODE by zonelist reset 2018-07-11 16:03:51 +02:00
page_counter.c
page_ext.c mm/page_ext.c: fix an imbalance with kmemleak 2019-04-27 09:33:48 +02:00
page_idle.c mm/page_idle.c: fix oops because end_pfn is larger than max_pfn 2019-07-10 09:56:30 +02:00
page_io.c
page_isolation.c
page_owner.c mm: check the return value of lookup_page_ext for all call sites 2017-11-24 08:32:25 +01:00
pagewalk.c mm/pagewalk.c: report holes in hugetlb ranges 2017-11-24 08:32:25 +01:00
percpu-km.c
percpu-vm.c
percpu.c percpu: include linux/sched.h for cond_resched() 2018-05-16 10:06:46 +02:00
pgtable-generic.c
process_vm_access.c mm: replace get_user_pages_unlocked() write/force parameters with gup_flags 2018-12-17 21:55:16 +01:00
quicklist.c
readahead.c
rmap.c mm/rmap: replace BUG_ON(anon_vma->degree) with VM_WARN_ON 2019-04-03 06:23:18 +02:00
shmem.c tmpfs: fix uninitialized return value in shmem_link 2019-03-23 08:44:34 +01:00
slab.c mm/slab.c: kmemleak no scan alien caches 2019-04-27 09:33:48 +02:00
slab.h
slab_common.c slub: do not merge cache if slub_debug contains a never-merge flag 2017-10-21 17:09:05 +02:00
slob.c
slub.c slub: make ->cpu_partial unsigned int 2018-10-10 08:52:08 +02:00
sparse-vmemmap.c
sparse.c
swap.c
swap_cgroup.c mm, swap_cgroup: reschedule when neeed in swap_cgroup_swapoff() 2017-07-05 14:37:15 +02:00
swap_state.c
swapfile.c x86/speculation/l1tf: Limit swap file size to MAX_PA/2 2018-08-15 17:42:10 +02:00
truncate.c mm: cleancache: fix corruption on missed inode invalidation 2018-12-13 09:21:33 +01:00
userfaultfd.c
util.c mm: replace get_user_pages_unlocked() write/force parameters with gup_flags 2018-12-17 21:55:16 +01:00
vmacache.c mm: get rid of vmacache_flush_all() entirely 2018-09-19 22:49:00 +02:00
vmalloc.c mm/vmalloc.c: fix kernel BUG at mm/vmalloc.c:512! 2019-04-27 09:33:48 +02:00
vmpressure.c mm: vmpressure: fix sending wrong events on underflow 2017-03-12 06:37:25 +01:00
vmscan.c mm: fix the NULL mapping case in __isolate_lru_page() 2018-06-06 16:46:23 +02:00
vmstat.c mm, vmstat: make quiet_vmstat lighter 2019-08-04 09:35:01 +02:00
workingset.c mm: workingset: fix crash in shadow node shrinker caused by replace_page_cache_page() 2016-10-28 03:01:34 -04:00
zbud.c
zpool.c
zsmalloc.c
zswap.c zswap: re-check zswap_is_full() after do zswap_shrink() 2018-09-05 09:18:36 +02:00