Linus Torvalds fee7e49d45 mm: propagate error from stack expansion even for guard page ... Jay Foad reports that the address sanitizer test (asan) sometimes gets confused by a stack pointer that ends up being outside the stack vma that is reported by /proc/maps. This happens due to an interaction between RLIMIT_STACK and the guard page: when we do the guard page check, we ignore the potential error from the stack expansion, which effectively results in a missing guard page, since the expected stack expansion won't have been done. And since /proc/maps explicitly ignores the guard page (commit d7824370e2: "mm: fix up some user-visible effects of the stack guard page"), the stack pointer ends up being outside the reported stack area. This is the minimal patch: it just propagates the error. It also effectively makes the guard page part of the stack limit, which in turn measn that the actual real stack is one page less than the stack limit. Let's see if anybody notices. We could teach acct_stack_growth() to allow an extra page for a grow-up/grow-down stack in the rlimit test, but I don't want to add more complexity if it isn't needed. Reported-and-tested-by: Jay Foad <jay.foad@gmail.com> Cc: stable@vger.kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2015-01-06 13:00:05 -08:00
..
backing-dev.c	Merge branch 'for-3.18/core' of git://git.kernel.dk/linux-block	2014-10-18 11:53:51 -07:00
balloon_compaction.c	mm/balloon_compaction: fix deflation when compaction is disabled	2014-10-29 16:33:15 -07:00
bootmem.c	mem-hotplug: reset node managed pages when hot-adding a new pgdat	2014-11-13 16:17:06 -08:00
cleancache.c	mm: dump page when hitting a VM_BUG_ON using VM_BUG_ON_PAGE	2014-01-23 16:36:50 -08:00
cma.c	mm: cma: split cma-reserved in dmesg log	2014-12-18 19:08:10 -08:00
compaction.c	mm, compaction: more focused lru and pcplists draining	2014-12-10 17:41:06 -08:00
debug-pagealloc.c	mm/debug-pagealloc: make debug-pagealloc boottime configurable	2014-12-13 12:42:48 -08:00
debug.c	mm: move page->mem_cgroup bad page handling into generic code	2014-12-10 17:41:09 -08:00
dmapool.c	mm/dmapool.c: fixed a brace coding style issue	2014-10-09 22:26:00 -04:00
early_ioremap.c	mm: create generic early_ioremap() support	2014-04-07 16:36:15 -07:00
fadvise.c	mm: fadvise: document the fadvise(FADV_DONTNEED) behaviour for partial pages	2014-12-13 12:42:49 -08:00
failslab.c
filemap_xip.c	mm/xip: share the i_mmap_rwsem	2014-12-13 12:42:45 -08:00
filemap.c	mm: get rid of radix tree gfp mask for pagecache_get_page	2014-12-29 12:45:45 -08:00
fremap.c	Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux	2014-12-15 15:52:01 -08:00
frontswap.c	mm/frontswap.c: fix the condition in BUG_ON	2014-12-10 17:41:08 -08:00
gup.c	kernel: Provide READ_ONCE and ASSIGN_ONCE	2014-12-20 16:48:59 -08:00
highmem.c	mm/highmem: make kmap cache coloring aware	2014-08-06 18:01:22 -07:00
huge_memory.c	Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux	2014-12-15 15:52:01 -08:00
hugetlb_cgroup.c	mm: hugetlb_cgroup: convert to lockless page counters	2014-12-10 17:41:04 -08:00
hugetlb.c	Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux	2014-12-15 15:52:01 -08:00
hwpoison-inject.c	mm/hwpoison-inject.c: remove unnecessary null test before debugfs_remove_recursive	2014-08-06 18:01:19 -07:00
init-mm.c
internal.h	mm, compaction: always update cached scanner positions	2014-12-10 17:41:06 -08:00
interval_tree.c	mm: convert a few VM_BUG_ON callers to VM_BUG_ON_VMA	2014-10-09 22:25:57 -04:00
iov_iter.c	copy_from_iter_nocache()	2014-12-08 20:25:23 -05:00
Kconfig	mm/balloon_compaction: add vmstat counters and kpageflags bit	2014-10-09 22:26:01 -04:00
Kconfig.debug	mm/debug-pagealloc: prepare boottime configurable on/off	2014-12-13 12:42:48 -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	mm: introduce kmemleak_update_trace()	2014-06-06 16:08:17 -07:00
ksm.c	mmu_notifier: call mmu_notifier_invalidate_range() from VMM	2014-11-13 13:46:09 +11:00
list_lru.c	mm: keep page cache radix tree nodes in check	2014-04-03 16:21:01 -07:00
maccess.c
madvise.c	VFS: Rename do_fallocate() to vfs_fallocate()	2014-11-07 16:17:44 -05:00
Makefile	mm/page_owner: keep track of page owners	2014-12-13 12:42:48 -08:00
memblock.c	mm/memblock.c: refactor functions to set/clear MEMBLOCK_HOTPLUG	2014-12-13 12:42:46 -08:00
memcontrol.c	mm/memcontrol.c: remove unused mem_cgroup_lru_names_not_uptodate()	2014-12-13 12:42:49 -08:00
memory_hotplug.c	mm, memory_hotplug/failure: drain single zone pcplists	2014-12-10 17:41:05 -08:00
memory-failure.c	mm: vmscan: invoke slab shrinkers from shrink_zone()	2014-12-13 12:42:48 -08:00
memory.c	mm: propagate error from stack expansion even for guard page	2015-01-06 13:00:05 -08:00
mempolicy.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2014-12-19 18:19:19 -08:00
mempool.c	mm/mempool.c: update the kmemleak stack trace for mempool allocations	2014-06-06 16:08:17 -07:00
migrate.c	vm_area_operations: kill ->migrate()	2014-12-17 08:26:51 -05:00
mincore.c	mm: mincore: add hwpoison page handle	2014-12-13 12:42:46 -08:00
mlock.c	Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2014-10-13 15:44:12 +02:00
mm_init.c	mm: bring back /sys/kernel/mm	2014-01-27 21:02:39 -08:00
mmap.c	mm: export find_extend_vma() and handle_mm_fault() for driver use	2014-12-13 12:42:47 -08:00
mmu_context.c	sched/mm: call finish_arch_post_lock_switch in idle_task_exit and use_mm	2014-02-21 08:50:17 +01:00
mmu_notifier.c	mmu_notifier: add the callback for mmu_notifier_invalidate_range()	2014-11-13 13:46:09 +11:00
mmzone.c	mm: numa: Change page last {nid,pid} into {cpu,pid}	2013-10-09 14:47:45 +02:00
mprotect.c	mm: softdirty: enable write notifications on VMAs after VM_SOFTDIRTY cleared	2014-10-14 02:18:28 +02:00
mremap.c	Merge git://git.kvack.org/~bcrl/aio-next	2014-12-14 13:36:57 -08:00
msync.c	msync: fix incorrect fstart calculation	2014-07-03 09:21:53 -07:00
nobootmem.c	mem-hotplug: reset node managed pages when hot-adding a new pgdat	2014-11-13 16:17:06 -08:00
nommu.c	mm/nommu: use alloc_pages_exact() rather than its own implementation	2014-12-13 12:42:48 -08:00
oom_kill.c	oom: kill the insufficient and no longer needed PT_TRACE_EXIT check	2014-12-13 12:42:49 -08:00
page_alloc.c	mm: cma: split cma-reserved in dmesg log	2014-12-18 19:08:10 -08:00
page_counter.c	mm: memcontrol: remove obsolete kmemcg pinning tricks	2014-12-10 17:41:05 -08:00
page_ext.c	mm/page_owner: keep track of page owners	2014-12-13 12:42:48 -08:00
page_io.c	fix __swap_writepage() compile failure on old gcc versions	2014-06-14 19:30:48 -05:00
page_isolation.c	mm, page_isolation: drain single zone pcplists	2014-12-10 17:41:05 -08:00
page_owner.c	mm/page_owner: correct owner information for early allocated pages	2014-12-13 12:42:48 -08:00
page-writeback.c	mm, memcg: fix potential undefined behaviour in page stat accounting	2014-12-10 17:41:08 -08:00
pagewalk.c	mm: use VM_BUG_ON_MM where possible	2014-10-09 22:25:58 -04:00
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: off by one in BUG_ON()	2014-10-29 10:34:34 -04:00
pgtable-generic.c	mm: actually clear pmd_numa before invalidating	2014-08-29 16:28:15 -07:00
process_vm_access.c	start adding the tag to iov_iter	2014-05-06 17:32:49 -04:00
quicklist.c
readahead.c	mm/readahead.c: remove unused file_ra_state from count_history_pages	2014-08-06 18:01:15 -07:00
rmap.c	kernel: Provide READ_ONCE and ASSIGN_ONCE	2014-12-20 16:48:59 -08:00
shmem.c	new helper: iter_is_iovec()	2014-12-17 06:43:56 -05:00
slab_common.c	memcg: use generic slab iterators for showing slabinfo	2014-12-10 17:41:07 -08:00
slab.c	slab: fix cpuset check in fallback_alloc	2014-12-13 12:42:53 -08:00
slab.h	memcg: use generic slab iterators for showing slabinfo	2014-12-10 17:41:07 -08:00
slob.c	mm/sl[ao]b: always track caller in kmalloc_(node_)track_caller()	2014-10-09 22:25:50 -04:00
slub.c	slub: fix cpuset check in get_any_partial	2014-12-13 12:42:53 -08:00
sparse-vmemmap.c	mm/sparse: use memblock apis for early memory allocations	2014-01-21 16:19:47 -08:00
sparse.c	mm: use macros from compiler.h instead of __attribute__((...))	2014-04-07 16:35:54 -07:00
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: page_cgroup: rename file to mm/swap_cgroup.c	2014-12-10 17:41:09 -08:00
swap.c	mm: memcontrol: do not kill uncharge batching in free_pages_and_swap_cache	2014-10-09 22:25:59 -04:00
swapfile.c	mm: page_cgroup: rename file to mm/swap_cgroup.c	2014-12-10 17:41:09 -08:00
truncate.c	mm: Fix comment before truncate_setsize()	2014-11-07 08:29:25 +11:00
util.c	proc/maps: make vm_is_stack() logic namespace-friendly	2014-10-09 22:25:50 -04:00
vmacache.c	mm,vmacache: count number of system-wide flushes	2014-12-13 12:42:48 -08:00
vmalloc.c	mm/vmalloc.c: fix memory ordering bug	2014-12-13 12:42:49 -08:00
vmpressure.c	mm/vmpressure.c: fix race in vmpressure_work_fn()	2014-12-02 17:32:07 -08:00
vmscan.c	mm: vmscan: invoke slab shrinkers from shrink_zone()	2014-12-13 12:42:48 -08:00
vmstat.c	mm,vmacache: count number of system-wide flushes	2014-12-13 12:42:48 -08:00
workingset.c	mm: keep page cache radix tree nodes in check	2014-04-03 16:21:01 -07:00
zbud.c	mm/zbud: init user ops only when it is needed	2014-12-13 12:42:51 -08:00
zpool.c	mm/zpool: use prefixed module loading	2014-08-29 16:28:16 -07:00
zsmalloc.c	mm/zsmalloc: adjust order of functions	2014-12-18 19:08:11 -08:00
zswap.c	mm/zswap: delete unnecessary check before calling free_percpu()	2014-12-13 12:42:50 -08:00