Linus Torvalds 197e7e5213 Sanitize 'move_pages()' permission checks ... The 'move_paghes()' system call was introduced long long ago with the same permission checks as for sending a signal (except using CAP_SYS_NICE instead of CAP_SYS_KILL for the overriding capability). That turns out to not be a great choice - while the system call really only moves physical page allocations around (and you need other capabilities to do a lot of it), you can check the return value to map out some the virtual address choices and defeat ASLR of a binary that still shares your uid. So change the access checks to the more common 'ptrace_may_access()' model instead. This tightens the access checks for the uid, and also effectively changes the CAP_SYS_NICE check to CAP_SYS_PTRACE, but it's unlikely that anybody really _uses_ this legacy system call any more (we hav ebetter NUMA placement models these days), so I expect nobody to notice. Famous last words. Reported-by: Otto Ebeling <otto.ebeling@iki.fi> Acked-by: Eric W. Biederman <ebiederm@xmission.com> Cc: Willy Tarreau <w@1wt.eu> Cc: stable@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2017-08-20 13:26:27 -07:00
..
kasan	kasan: avoid -Wmaybe-uninitialized warning	2017-08-02 16:34:46 -07:00
backing-dev.c	bdi: Drop 'parent' argument from bdi_register[_va]()	2017-04-20 12:09:55 -06:00
balloon_compaction.c	mm/balloon_compaction.c: don't zero ballooned pages	2017-08-10 15:54:07 -07:00
bootmem.c	mm/bootmem.c: cosmetic improvement of code readability	2017-02-22 16:41:29 -08:00
cleancache.c	fs: switch ->s_uuid to uuid_t	2017-06-05 16:59:12 +02:00
cma_debug.c	mm/cma_debug.c: fix stack corruption due to sprintf usage	2017-08-18 15:32:02 -07:00
cma.c	cma: fix calculation of aligned offset	2017-07-10 16:32:32 -07:00
cma.h	cma: Store a name in the cma structure	2017-04-18 20:41:12 +02:00
compaction.c	mm, compaction: skip over holes in __reset_isolation_suitable	2017-07-06 16:24:32 -07:00
debug_page_ref.c
debug.c	mm: make tlb_flush_pending global	2017-08-10 15:54:07 -07:00
dmapool.c	lib/vsprintf.c: remove %Z support	2017-02-27 18:43:47 -08:00
early_ioremap.c
fadvise.c
failslab.c
filemap.c	mm: hugetlb: return immediately for hugetlb page in __delete_from_page_cache()	2017-07-10 16:32:30 -07:00
frame_vector.c	treewide: use kv[mz]alloc* rather than opencoded variants	2017-05-08 17:15:13 -07:00
frontswap.c
gup.c	mm, gup: ensure real head page is ref-counted when using hugepages	2017-07-06 16:24:34 -07:00
highmem.c
huge_memory.c	mm, oom: fix potential data corruption when oom_reaper races with writer	2017-08-18 15:32:01 -07:00
hugetlb_cgroup.c
hugetlb.c	userfaultfd: hugetlbfs: remove superfluous page unlock in VM_SHARED case	2017-08-10 15:54:06 -07:00
hwpoison-inject.c	mm: hwpoison: call shake_page() unconditionally	2017-05-03 15:52:12 -07:00
init-mm.c
internal.h	mm, mprotect: flush TLB if potentially racing with a parallel reclaim leaving stale TLB entries	2017-08-02 16:34:46 -07:00
interval_tree.c
Kconfig	mm/kasan: add support for memory hotplug	2017-07-10 16:32:33 -07:00
Kconfig.debug	mm: enable page poisoning early at boot	2017-05-03 15:52:10 -07:00
khugepaged.c	mm: make PR_SET_THP_DISABLE immediately active	2017-07-10 16:32:31 -07:00
kmemcheck.c	mm: Rename SLAB_DESTROY_BY_RCU to SLAB_TYPESAFE_BY_RCU	2017-04-18 11:42:36 -07:00
kmemleak-test.c
kmemleak.c	mm: kmemleak: treat vm_struct as alternative reference to vmalloc'ed objects	2017-07-06 16:24:34 -07:00
ksm.c	mm: fix KSM data corruption	2017-08-10 15:54:07 -07:00
list_lru.c	mm/list_lru.c: fix list_lru_count_node() to be race free	2017-07-10 16:32:33 -07:00
maccess.c
madvise.c	mm, mprotect: flush TLB if potentially racing with a parallel reclaim leaving stale TLB entries	2017-08-02 16:34:46 -07:00
Makefile	percpu: expose statistics about percpu memory via debugfs	2017-06-20 15:31:38 -04:00
memblock.c	mm: discard memblock data later	2017-08-18 15:32:01 -07:00
memcontrol.c	mm: memcontrol: fix NULL pointer crash in test_clear_page_writeback()	2017-08-18 15:32:01 -07:00
memory_hotplug.c	mm/memory-hotplug: switch locking to a percpu rwsem	2017-07-10 16:32:33 -07:00
memory-failure.c	mm, hugetlb, soft_offline: use new_page_nodemask for soft offline migration	2017-07-10 16:32:32 -07:00
memory.c	mm, oom: fix potential data corruption when oom_reaper races with writer	2017-08-18 15:32:01 -07:00
mempolicy.c	mm/mempolicy: fix use after free when calling get_mempolicy	2017-08-18 15:32:02 -07:00
mempool.c	sched/wait: Rename wait_queue_t => wait_queue_entry_t	2017-06-20 12:18:27 +02:00
memtest.c
migrate.c	Sanitize 'move_pages()' permission checks	2017-08-20 13:26:27 -07:00
mincore.c	mm: remove shmem_mapping() shmem_zero_setup() duplicates	2017-02-24 17:46:56 -08:00
mlock.c	mlock: fix mlock count can not decrease in race condition	2017-06-02 15:07:38 -07:00
mm_init.c
mmap.c	mm: fix overflow check in expand_upwards()	2017-07-14 15:05:12 -07:00
mmu_context.c	sched/headers: Prepare to move the task_lock()/unlock() APIs to <linux/sched/task.h>	2017-03-02 08:42:38 +01:00
mmu_notifier.c	mm: Use static initialization for "srcu"	2017-04-18 11:38:22 -07:00
mmzone.c	mm/mmzone.c: swap likely to unlikely as code logic is different for next_zones_zonelist()	2017-02-22 16:41:29 -08:00
mprotect.c	mm: migrate: prevent racy access to tlb_flush_pending	2017-08-10 15:54:07 -07:00
mremap.c	userfaultfd: non-cooperative: notify about unmap of destination during mremap	2017-08-02 16:34:46 -07:00
msync.c
nobootmem.c	mm: discard memblock data later	2017-08-18 15:32:01 -07:00
nommu.c	mm, vmalloc: use __GFP_HIGHMEM implicitly	2017-05-08 17:15:13 -07:00
oom_kill.c	mm/oom_kill.c: add tracepoints for oom reaper-related events	2017-07-10 16:32:32 -07:00
page_alloc.c	mm: discard memblock data later	2017-08-18 15:32:01 -07:00
page_counter.c
page_ext.c	mm: enable page poisoning early at boot	2017-05-03 15:52:10 -07:00
page_idle.c	mm: make rmap_one boolean function	2017-05-03 15:52:10 -07:00
page_io.c	mm/page_io.c: fix oops during block io poll in swapin path	2017-08-02 17:16:11 -07:00
page_isolation.c	mm: unify new_node_page and alloc_migrate_target	2017-07-10 16:32:31 -07:00
page_owner.c	mm: avoid taking zone lock in pagetypeinfo_showmixed()	2017-07-10 16:32:32 -07:00
page_poison.c	mm: enable page poisoning early at boot	2017-05-03 15:52:10 -07:00
page_vma_mapped.c	mm/hugetlb: add size parameter to huge_pte_offset()	2017-07-06 16:24:34 -07:00
page-writeback.c	mm: memcontrol: fix NULL pointer crash in test_clear_page_writeback()	2017-08-18 15:32:01 -07:00
pagewalk.c	mm/hugetlb: add size parameter to huge_pte_offset()	2017-07-06 16:24:34 -07:00
percpu-internal.h	percpu: fix early calls for spinlock in pcpu_stats	2017-06-21 13:53:52 -04:00
percpu-km.c	percpu: fix static checker warnings in pcpu_destroy_chunk	2017-06-29 11:23:38 -04:00
percpu-stats.c	percpu: expose statistics about percpu memory via debugfs	2017-06-20 15:31:38 -04:00
percpu-vm.c	percpu: fix static checker warnings in pcpu_destroy_chunk	2017-06-29 11:23:38 -04:00
percpu.c	percpu: resolve err may not be initialized in pcpu_alloc	2017-06-21 12:00:45 -04:00
pgtable-generic.c	mm: convert generic code to 5-level paging	2017-03-09 11:48:47 -08:00
process_vm_access.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/mm.h>	2017-03-02 08:42:28 +01:00
quicklist.c
readahead.c
rmap.c	rmap: do not call mmu_notifier_invalidate_page() under ptl	2017-08-10 15:54:07 -07:00
rodata_test.c	mm: remove rodata_test_data export, add pr_fmt	2017-05-03 15:52:09 -07:00
shmem.c	mm: fix list corruptions on shmem shrinklist	2017-08-10 15:54:07 -07:00
slab_common.c	mm: allow slab_nomerge to be set at build time	2017-07-06 16:24:31 -07:00
slab.c	mm: memcontrol: account slab stats per lruvec	2017-07-06 16:24:35 -07:00
slab.h	mm: memcontrol: account slab stats per lruvec	2017-07-06 16:24:35 -07:00
slob.c	mm: Rename SLAB_DESTROY_BY_RCU to SLAB_TYPESAFE_BY_RCU	2017-04-18 11:42:36 -07:00
slub.c	slub: fix per memcg cache leak on css offline	2017-08-18 15:32:01 -07:00
sparse-vmemmap.c	mm, tree wide: replace __GFP_REPEAT by __GFP_RETRY_MAYFAIL with more useful semantic	2017-07-12 16:26:03 -07:00
sparse.c	mm, memory_hotplug: do not associate hotadded memory to zones until online	2017-07-06 16:24:32 -07:00
swap_cgroup.c	mm, THP, swap: delay splitting THP during swap out	2017-07-06 16:24:31 -07:00
swap_slots.c	mm/swap_slots.c: don't disable preemption while taking the per-CPU cache	2017-07-10 16:32:32 -07:00
swap_state.c	swap: add block io poll in swapin path	2017-07-10 16:32:30 -07:00
swap.c	mm: swap: provide lru_add_drain_all_cpuslocked()	2017-07-10 16:32:33 -07:00
swapfile.c	swap: add block io poll in swapin path	2017-07-10 16:32:30 -07:00
truncate.c	mm/truncate.c: fix THP handling in invalidate_mapping_pages()	2017-07-10 16:32:32 -07:00
usercopy.c	mm/usercopy: Drop extra is_vmalloc_or_module() check	2017-04-05 12:30:18 -07:00
userfaultfd.c	mm: convert generic code to 5-level paging	2017-03-09 11:48:47 -08:00
util.c	mm: fix global NR_SLAB_.*CLAIMABLE counter reads	2017-08-10 15:54:06 -07:00
vmacache.c	sched/headers: Prepare to move 'init_task' and 'init_thread_union' from <linux/sched.h> to <linux/sched/task.h>	2017-03-02 08:42:38 +01:00
vmalloc.c	mm/vmalloc.c: don't unconditonally use __GFP_HIGHMEM	2017-08-18 15:32:02 -07:00
vmpressure.c	mm, vmpressure: pass-through notification support	2017-07-10 16:32:31 -07:00
vmscan.c	mm, tree wide: replace __GFP_REPEAT by __GFP_RETRY_MAYFAIL with more useful semantic	2017-07-12 16:26:03 -07:00
vmstat.c	mm: avoid taking zone lock in pagetypeinfo_showmixed()	2017-07-10 16:32:32 -07:00
workingset.c	mm: memcontrol: per-lruvec stats infrastructure	2017-07-06 16:24:35 -07:00
z3fold.c	z3fold: fix page locking in z3fold_alloc()	2017-04-13 18:24:20 -07:00
zbud.c
zpool.c
zsmalloc.c	zram: do not free pool->size_class	2017-08-02 16:34:47 -07:00
zswap.c	mm/zswap.c: delete an error message for a failed memory allocation in zswap_dstmem_prepare()	2017-07-06 16:24:35 -07:00