linux/mm
Vlastimil Babka d014cd7c1c mm, mremap: fix mremap() expanding for vma's with vm_ops->close()
Fabian has reported another regression in 6.1 due to ca3d76b0aa ("mm:
add merging after mremap resize").  The problem is that vma_merge() can
fail when vma has a vm_ops->close() method, causing is_mergeable_vma()
test to be negative.  This was happening for vma mapping a file from
fuse-overlayfs, which does have the method.  But when we are simply
expanding the vma, we never remove it due to the "merge" with the added
area, so the test should not prevent the expansion.

As a quick fix, check for such vmas and expand them using vma_adjust()
directly as was done before commit ca3d76b0aa.  For a more robust long
term solution we should try to limit the check for vma_ops->close only to
cases that actually result in vma removal, so that no merge would be
prevented unnecessarily.

[akpm@linux-foundation.org: fix indenting whitespace, reflow comment]
Link: https://lkml.kernel.org/r/20230117101939.9753-1-vbabka@suse.cz
Fixes: ca3d76b0aa ("mm: add merging after mremap resize")
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Reported-by: Fabian Vogt <fvogt@suse.com>
  Link: https://bugzilla.suse.com/show_bug.cgi?id=1206359#c35
Tested-by: Fabian Vogt <fvogt@suse.com>
Cc: Jakub Matěna <matenajakub@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2023-01-31 16:44:08 -08:00
..
damon mm/damon: use kstrtobool() instead of strtobool() 2022-11-30 15:58:45 -08:00
kasan kasan: mark kasan_kunit_executing as static 2023-01-11 16:14:21 -08:00
kfence hardening updates for v6.2-rc1 2022-12-14 12:20:00 -08:00
kmsan kmsan: export kmsan_handle_urb 2022-12-21 14:31:52 -08:00
backing-dev.c mm: add /sys/class/bdi/<bdi>/min_ratio_fine knob 2022-11-30 15:59:06 -08:00
balloon_compaction.c mm: Convert all PageMovable users to movable_operations 2022-08-02 12:34:03 -04:00
bootmem_info.c bootmem: remove the vmemmap pages from kmemleak in put_page_bootmem 2022-08-28 14:02:45 -07:00
cma_debug.c mm/cma_debug: show complete cma name in debugfs directories 2022-09-11 20:25:50 -07:00
cma_sysfs.c
cma.c Revert "mm/cma.c: remove redundant cma_mutex lock" 2022-05-13 15:11:26 -07:00
cma.h mm/cma: provide option to opt out from exposing pages on activation failure 2022-03-22 15:57:09 -07:00
compaction.c mm, compaction: fix fast_isolate_around() to stay within boundaries 2022-11-30 15:59:07 -08:00
debug_page_ref.c
debug_vm_pgtable.c mm: remove unused savedwrite infrastructure 2022-11-30 15:58:49 -08:00
debug.c mm,thp,rmap: simplify compound page mapcount handling 2022-11-30 15:58:46 -08:00
dmapool.c
early_ioremap.c mm/early_ioremap: declare early_memremap_pgprot_adjust() 2022-03-22 15:57:11 -07:00
fadvise.c mm/fadvise: use LLONG_MAX instead of -1 for eof 2022-12-11 18:12:11 -08:00
failslab.c mm: fix unexpected changes to {failslab|fail_page_alloc}.attr 2022-11-22 18:50:44 -08:00
filemap.c filemap: convert replace_page_cache_page() to replace_page_cache_folio() 2022-12-11 18:12:12 -08:00
folio-compat.c folio-compat: remove lru_cache_add() 2022-12-11 18:12:13 -08:00
frontswap.c frontswap: don't call ->init if no ops are registered 2022-09-26 12:14:34 -07:00
gup_test.c mm/gup_test: free memory allocated via kvcalloc() using kvfree() 2022-12-15 16:37:48 -08:00
gup_test.h mm/gup_test: start/stop/read functionality for PIN LONGTERM test 2022-11-08 17:37:15 -08:00
gup.c New Feature: 2022-12-17 14:06:53 -06:00
highmem.c highmem: fix kmap_to_page() for kmap_local_page() addresses 2022-10-12 18:51:51 -07:00
hmm.c mm: Remove pointless barrier() after pmdp_get_lockless() 2022-12-15 10:37:27 -08:00
huge_memory.c ARM64: 2022-12-15 11:12:21 -08:00
hugetlb_cgroup.c mm/hugeltb_cgroup: convert hugetlb_cgroup_commit_charge*() to folios 2022-11-30 15:58:43 -08:00
hugetlb_vmemmap.c mm/hugetlb_vmemmap: remap head page to newly allocated page 2022-11-30 15:58:47 -08:00
hugetlb_vmemmap.h mm: hugetlb_vmemmap: improve hugetlb_vmemmap code readability 2022-08-08 18:06:43 -07:00
hugetlb.c mm: fix a few rare cases of using swapin error pte marker 2023-01-18 17:02:19 -08:00
hwpoison-inject.c mm/hwpoison: add __init/__exit annotations to module init/exit funcs 2022-10-03 14:03:05 -07:00
init-mm.c mm: remove rb tree. 2022-09-26 19:46:16 -07:00
internal.h mm/hwpoison: introduce per-memory_block hwpoison counter 2022-11-08 17:37:22 -08:00
interval_tree.c
io-mapping.c
ioremap.c mm: ioremap: Add ioremap/iounmap_allowed() 2022-06-27 12:22:31 +01:00
Kconfig New Feature: 2022-12-17 14:06:53 -06:00
Kconfig.debug mm, slub: add CONFIG_SLUB_TINY 2022-11-27 23:38:02 +01:00
khugepaged.c mm/khugepaged: fix ->anon_vma race 2023-01-31 16:44:07 -08:00
kmemleak.c mm/kmemleak: use %pK to display kernel pointers in backtrace 2022-12-15 16:37:49 -08:00
ksm.c mm/ksm: convert break_ksm() to use walk_page_range_vma() 2022-12-11 18:12:09 -08:00
list_lru.c mm: kmem: make mem_cgroup_from_obj() vmalloc()-safe 2022-06-16 19:48:31 -07:00
maccess.c maccess: Fix writing offset in case of fault in strncpy_from_kernel_nofault() 2022-11-11 11:44:46 -08:00
madvise.c mm: update mmap_sem comments to refer to mmap_lock 2023-01-11 16:14:22 -08:00
Makefile mm: memcontrol: drop dead CONFIG_MEMCG_SWAP config symbol 2022-10-03 14:03:36 -07:00
mapping_dirty_helpers.c mm: Rename pmd_read_atomic() 2022-12-15 10:37:27 -08:00
memblock.c mm: Always release pages to the buddy allocator in memblock_free_late(). 2023-01-08 18:49:33 +02:00
memcontrol.c Revert "mm: add nodes= arg to memory.reclaim" 2023-01-31 16:44:07 -08:00
memfd.c
memory_hotplug.c mm: add pageblock_aligned() macro 2022-10-03 14:03:04 -07:00
memory-failure.c mm/memory-failure.c: cleanup in unpoison_memory 2022-11-30 15:59:08 -08:00
memory-tiers.c mm/demotion: fix NULL vs IS_ERR checking in memory_tier_init 2022-11-30 15:58:54 -08:00
memory.c mm: fix a few rare cases of using swapin error pte marker 2023-01-18 17:02:19 -08:00
mempolicy.c mm/mempolicy: fix memory leak in set_mempolicy_home_node system call 2022-12-21 14:31:51 -08:00
mempool.c mempool: do not use ksize() for poisoning 2022-11-30 15:58:41 -08:00
memremap.c mm/memremap.c: map FS_DAX device memory as decrypted 2022-11-08 15:57:23 -08:00
memtest.c
migrate_device.c mm/migrate_device: return number of migrating pages in args->cpages 2022-11-22 18:50:43 -08:00
migrate.c MM patches for 6.2-rc1. 2022-12-13 19:29:45 -08:00
mincore.c mm: convert find_get_incore_page() to filemap_get_incore_folio() 2022-11-08 17:37:18 -08:00
mlock.c mm/mlock: drop dead code in count_mm_mlocked_page_nr() 2022-09-26 19:46:27 -07:00
mm_init.c memory: move hotplug memory notifier priority to same file for easy sorting 2022-11-08 17:37:17 -08:00
mm_slot.h mm: introduce common struct mm_slot 2022-10-03 14:02:43 -07:00
mmap_lock.c
mmap.c mm: update mmap_sem comments to refer to mmap_lock 2023-01-11 16:14:22 -08:00
mmu_gather.c mm: mmu_gather: allow more than one batch of delayed rmaps 2022-12-11 18:12:21 -08:00
mmu_notifier.c mm/mmu_notifier.c: fix race in mmu_interval_notifier_remove() 2022-04-21 20:01:10 -07:00
mmzone.c mm: multi-gen LRU: groundwork 2022-09-26 19:46:09 -07:00
mprotect.c mm: fix a few rare cases of using swapin error pte marker 2023-01-18 17:02:19 -08:00
mremap.c mm, mremap: fix mremap() expanding for vma's with vm_ops->close() 2023-01-31 16:44:08 -08:00
msync.c mm/msync: use vma_find() instead of vma linked list 2022-09-26 19:46:25 -07:00
nommu.c nommu: fix split_vma() map_count error 2023-01-11 16:14:23 -08:00
oom_kill.c mm: reduce noise in show_mem for lowmem allocations 2022-09-26 19:46:29 -07:00
page_alloc.c mm/page_alloc: update comments in __free_pages_ok() 2022-12-11 18:12:17 -08:00
page_counter.c mm: page_counter: remove unneeded atomic ops for low/min 2022-09-11 20:26:01 -07:00
page_ext.c Merge branch 'mm-hotfixes-stable' into mm-stable 2022-11-30 14:58:42 -08:00
page_idle.c mm: don't be stuck to rmap lock on reclaim path 2022-05-19 14:08:54 -07:00
page_io.c use less confusing names for iov_iter direction initializers 2022-11-25 13:01:55 -05:00
page_isolation.c mm/page_isolation: fix clang deadcode warning 2022-10-28 13:37:22 -07:00
page_owner.c mm: reuse pageblock_start/end_pfn() macro 2022-10-03 14:03:03 -07:00
page_poison.c
page_reporting.c mm/page_reporting: Add checks for page_reporting_order param 2022-11-28 16:48:19 +00:00
page_reporting.h
page_table_check.c mm: use kstrtobool() instead of strtobool() 2022-11-30 15:58:45 -08:00
page_vma_mapped.c mm/swap: add swp_offset_pfn() to fetch PFN from swap entry 2022-09-26 19:46:05 -07:00
page-writeback.c mm: add bdi_set_min_ratio_no_scale() function 2022-11-30 15:59:06 -08:00
pagewalk.c mm/pagewalk: add walk_page_range_vma() 2022-12-11 18:12:08 -08:00
percpu-internal.h percpu: improve percpu_alloc_percpu event trace 2022-05-13 07:20:18 -07:00
percpu-km.c
percpu-stats.c mm: use vmalloc_array and vcalloc for array allocations 2022-03-08 09:30:46 -05:00
percpu-vm.c
percpu.c mm/percpu.c: remove the lcm code since block size is fixed at page size 2022-11-07 22:59:18 -08:00
pgalloc-track.h
pgtable-generic.c mm: avoid unnecessary flush on change_huge_pmd() 2022-05-13 07:20:05 -07:00
process_vm_access.c use less confusing names for iov_iter direction initializers 2022-11-25 13:01:55 -05:00
ptdump.c mm: pagewalk: Fix race between unmap and page walker 2022-09-03 10:13:13 -07:00
readahead.c mm: add PSI accounting around ->read_folio and ->readahead calls 2022-09-20 08:24:38 -06:00
rmap.c mm,thp,rmap: fix races between updates of subpages_mapcount 2022-12-11 18:12:20 -08:00
rodata_test.c mm/rodata_test: use PAGE_ALIGNED() helper 2022-10-03 14:03:05 -07:00
secretmem.c mm/secretmem: remove reduntant return value 2022-10-03 14:03:36 -07:00
shmem.c mm/shmem: restore SHMEM_HUGE_DENY precedence over MADV_COLLAPSE 2023-01-11 16:14:20 -08:00
shrinker_debug.c mm: shrinkers: fix double kfree on shrinker name 2022-07-29 18:07:13 -07:00
shuffle.c mm/shuffle: convert module_param_call to module_param_cb 2022-10-03 14:03:07 -07:00
shuffle.h
slab_common.c hardening updates for v6.2-rc1 2022-12-14 12:20:00 -08:00
slab.c Merge branch 'slab/for-6.2/kmalloc_redzone' into slab/for-next 2022-11-21 10:36:09 +01:00
slab.h Merge branch 'slub-tiny-v1r6' into slab/for-next 2022-12-01 00:14:00 +01:00
slob.c Merge branch 'slab/for-6.1/kmalloc_size_roundup' into slab/for-next 2022-09-29 11:30:55 +02:00
slub.c MM patches for 6.2-rc1. 2022-12-13 19:29:45 -08:00
sparse-vmemmap.c mm/sparse-vmemmap: generalise vmemmap_populate_hugepages() 2022-12-11 18:12:12 -08:00
sparse.c mm/hwpoison: introduce per-memory_block hwpoison counter 2022-11-08 17:37:22 -08:00
swap_cgroup.c mm: memcontrol: don't allocate cgroup swap arrays when memcg is disabled 2022-10-03 14:03:36 -07:00
swap_slots.c mm/swap: convert put_swap_page() to put_swap_folio() 2022-10-03 14:02:46 -07:00
swap_state.c mm: mmu_gather: prepare to gather encoded page pointers with flags 2022-11-30 15:58:50 -08:00
swap.c mm: teach release_pages() to take an array of encoded page pointers too 2022-11-30 15:58:50 -08:00
swap.h mm: convert find_get_incore_page() to filemap_get_incore_folio() 2022-11-08 17:37:18 -08:00
swapfile.c MM patches for 6.2-rc1. 2022-12-13 19:29:45 -08:00
truncate.c folio-compat: remove lru_cache_add() 2022-12-11 18:12:13 -08:00
usercopy.c mm: use kstrtobool() instead of strtobool() 2022-11-30 15:58:45 -08:00
userfaultfd.c New Feature: 2022-12-17 14:06:53 -06:00
util.c mm,thp,rmap: simplify compound page mapcount handling 2022-11-30 15:58:46 -08:00
vmalloc.c mm: vmalloc: use trace_free_vmap_area_noflush event 2022-11-08 17:37:17 -08:00
vmpressure.c
vmscan.c mm: multi-gen LRU: fix crash during cgroup migration 2023-01-31 16:44:08 -08:00
vmstat.c mm: vmscan: split khugepaged stats from direct reclaim stats 2022-11-30 15:58:41 -08:00
workingset.c folio-compat: remove lru_cache_add() 2022-12-11 18:12:13 -08:00
z3fold.c zpool: clean out dead code 2022-12-11 18:12:10 -08:00
zbud.c zpool: clean out dead code 2022-12-11 18:12:10 -08:00
zpool.c zpool: clean out dead code 2022-12-11 18:12:10 -08:00
zsmalloc.c zsmalloc: fix a race with deferred_handles storing 2023-01-31 16:44:07 -08:00
zswap.c zswap: fix writeback lock ordering for zsmalloc 2022-12-11 18:12:09 -08:00