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faf3c923523e5c8fc3baaa413d62e913774ae52f
linux/mm
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Matthew Wilcox (Oracle) faf3c92352 mm: fix vma_start_write_killable() signal handling 
If we get a signal, we need to restore the vm_refcnt.  We don't think that
the refcount can actually be decremented to zero here as it requires the
VMA to be detached, and the vma_mark_detached() uses TASK_UNINTERRUPTIBLE.
However, that's a bit subtle, so handle it as if the refcount was zero at
the start of this function.

Link: https://lkml.kernel.org/r/20251128040100.3022561-1-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>

Reported-by: syzbot+5b19bad23ac7f44bf8b8@syzkaller.appspotmail.com
Fixes: 2197bb60f8 ("mm: add vma_start_write_killable()")
Reviewed-by: Suren Baghdasaryan <surenb@google.com>
Reviewed-by: Vlastimil Babka <vbabka@suse.cz>
Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-11-29 10:41:11 -08:00
..
damon
mm/damon/tests/sysfs-kunit: fix use after free on error path
2025-11-24 15:08:55 -08:00
kasan
kasan: cleanup of kasan_enabled() checks
2025-11-16 17:28:01 -08:00
kfence
mm/kfence: add reboot notifier to disable KFENCE on shutdown
2025-11-29 10:41:10 -08:00
kmsan
kmsan: remove hard-coded GFP_KERNEL flags
2025-11-16 17:27:54 -08:00
backing-dev.c
Merge tag 'fuse-update-6.18' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse
2025-10-03 12:48:18 -07:00
balloon_compaction.c
mm/migrate: fix NULL movable_ops if CONFIG_ZSMALLOC=m
2025-08-19 16:35:57 -07:00
bootmem_info.c
mm/sparse: allow for alternate vmemmap section init at boot
2025-03-16 22:06:27 -07:00
cma_debug.c
mm: cma: simplify cma_maxchunk_get()
2025-07-24 19:12:36 -07:00
cma_sysfs.c
mm/cma: export total and free number of pages for CMA areas
2025-03-16 22:06:24 -07:00
cma.c
mm/cma: refuse handing out non-contiguous page ranges
2025-09-21 14:22:06 -07:00
cma.h
mm: cma: set early_pfn and bitmap as a union in cma_memrange
2025-05-22 14:55:36 -07:00
compaction.c
mm/compaction: fix low_pfn advance on isolating hugetlb
2025-09-28 11:51:29 -07:00
debug_page_alloc.c
mm/debug_page_alloc: improve error message for invalid guardpage minorder
2025-05-12 23:50:38 -07:00
debug_page_ref.c
…
debug_vm_pgtable.c
mm: softdirty: add pgtable_supports_soft_dirty()
2025-11-24 15:08:54 -08:00
debug.c
mm: constify __dump_folio() arguments
2025-11-20 13:43:57 -08:00
dmapool_test.c
mm/dmapool: add MODULE_DESCRIPTION()
2024-07-03 19:29:58 -07:00
dmapool.c
docs: dma-api: replace consistent with coherent
2025-07-01 13:25:36 -06:00
early_ioremap.c
mm/early_ioremap: add null pointer checks to prevent NULL-pointer dereference
2025-01-13 22:40:59 -08:00
execmem.c
mm: remove PMD alignment constraint in execmem_vmalloc()
2025-09-28 11:51:31 -07:00
fadvise.c
fdget(), trivial conversions
2024-11-03 01:28:06 -05:00
fail_page_alloc.c
fault-inject: improve build for CONFIG_FAULT_INJECTION=n
2024-09-01 20:43:33 -07:00
failslab.c
fault-inject: improve build for CONFIG_FAULT_INJECTION=n
2024-09-01 20:43:33 -07:00
filemap.c
memcg: remove __lruvec_stat_mod_folio
2025-11-24 15:08:54 -08:00
folio-compat.c
mm: Remove grab_cache_page_write_begin()
2025-03-04 17:02:25 +00:00
gup_test.c
…
gup_test.h
…
gup.c
mm: replace READ_ONCE() with standard page table accessors
2025-11-16 17:27:56 -08:00
highmem.c
mm: constify highmem related functions for improved const-correctness
2025-09-21 14:22:15 -07:00
hmm.c
mm: eliminate further swapops predicates
2025-11-24 15:08:52 -08:00
huge_memory.c
mm: softdirty: add pgtable_supports_soft_dirty()
2025-11-24 15:08:54 -08:00
hugetlb_cgroup.c
page_counter: track failcnt only for legacy cgroups
2025-03-17 00:05:35 -07:00
hugetlb_cma.c
mm: hugetlb: directly pass order when allocate a hugetlb folio
2025-09-21 14:22:11 -07:00
hugetlb_cma.h
mm: hugetlb: directly pass order when allocate a hugetlb folio
2025-09-21 14:22:11 -07:00
hugetlb_internal.h
mm/hugetlb: extract sysctl into hugetlb_sysctl.c
2025-11-20 13:43:57 -08:00
hugetlb_sysctl.c
mm/hugetlb: extract sysctl into hugetlb_sysctl.c
2025-11-20 13:43:57 -08:00
hugetlb_sysfs.c
mm/hugetlb: extract sysfs into hugetlb_sysfs.c
2025-11-20 13:43:57 -08:00
hugetlb_vmemmap.c
treewide: include linux/pgalloc.h instead of asm/pgalloc.h
2025-11-16 17:28:25 -08:00
hugetlb_vmemmap.h
mm/hugetlb: do pre-HVO for bootmem allocated pages
2025-03-16 22:06:29 -07:00
hugetlb.c
mm: eliminate further swapops predicates
2025-11-24 15:08:52 -08:00
hwpoison-inject.c
mm/hwpoison: decouple hwpoison_filter from mm/memory-failure.c
2025-09-21 14:22:21 -07:00
init-mm.c
mm: replace vm_lock and detached flag with a reference count
2025-03-16 22:06:20 -07:00
internal.h
mm: softdirty: add pgtable_supports_soft_dirty()
2025-11-24 15:08:54 -08:00
interval_tree.c
…
ioremap.c
mm/ioremap: pass pgprot_t to ioremap_prot() instead of unsigned long
2025-03-16 22:06:23 -07:00
Kconfig
mm/memory-failure: remove the selection of RAS
2025-11-24 15:08:55 -08:00
Kconfig.debug
mm: fix DEBUG_RODATA_TEST indentation in Kconfig
2025-11-29 10:41:09 -08:00
khugepaged.c
mm: declare VMA flags by bit
2025-11-29 10:41:08 -08:00
kmemleak.c
mm: fix possible deadlock in kmemleak
2025-09-01 17:11:37 -07:00
ksm.c
mm: eliminate further swapops predicates
2025-11-24 15:08:52 -08:00
list_lru.c
mm, list_lru: refactor the locking code
2025-07-09 22:41:56 -07:00
maccess.c
mm: unexport globally copy_to_kernel_nofault
2025-07-09 22:42:22 -07:00
madvise.c
mm: declare VMA flags by bit
2025-11-29 10:41:08 -08:00
Makefile
mm/hugetlb: extract sysctl into hugetlb_sysctl.c
2025-11-20 13:43:57 -08:00
mapping_dirty_helpers.c
mm/dirty: replace READ_ONCE() with pudp_get()
2025-11-16 17:27:58 -08:00
memblock.c
kho: replace kho_preserve_phys() with kho_preserve_pages()
2025-10-07 13:48:55 -07:00
memcontrol-v1.c
mm/memcg: v1: account event registrations and drop world-writable cgroup.event_control
2025-09-21 14:22:26 -07:00
memcontrol-v1.h
memcg: move do_memsw_account() to CONFIG_MEMCG_V1
2025-03-21 22:03:11 -07:00
memcontrol.c
memcg: remove __lruvec_stat_mod_folio
2025-11-24 15:08:54 -08:00
memfd.c
mm/memfd: fix information leak in hugetlb folios
2025-11-24 14:25:17 -08:00
memory_hotplug.c
memory_hotplug: optimise try_offline_memory_block()
2025-11-20 13:43:57 -08:00
memory-failure.c
mm/memory-failure: remove the selection of RAS
2025-11-24 15:08:55 -08:00
memory-tiers.c
mm: fix some typos in mm module
2025-11-16 17:27:52 -08:00
memory.c
mm: userfaultfd: add pgtable_supports_uffd_wp()
2025-11-24 15:08:54 -08:00
mempolicy.c
mm: eliminate further swapops predicates
2025-11-24 15:08:52 -08:00
mempool.c
mm: mempool: fix crash in mempool_free() for zero-minimum pools
2025-08-02 12:06:13 -07:00
memremap.c
mm/zone_device: rename page_free callback to folio_free
2025-11-24 15:08:47 -08:00
memtest.c
memtest: use {READ,WRITE}_ONCE in memory scanning
2024-03-13 12:12:21 -07:00
migrate_device.c
mm/huge_memory.c: introduce folio_split_unmapped
2025-11-24 15:08:53 -08:00
migrate.c
memcg: remove __mod_lruvec_state
2025-11-24 15:08:54 -08:00
mincore.c
mm: replace remaining pte_to_swp_entry() with softleaf_from_pte()
2025-11-24 15:08:52 -08:00
mlock.c
mm: update vma_modify_flags() to handle residual flags, document
2025-11-20 13:43:58 -08:00
mm_init.c
drivers/base/node: fold register_node() into register_one_node()
2025-11-16 17:28:02 -08:00
mm_slot.h
…
mmap_lock.c
mm: fix vma_start_write_killable() signal handling
2025-11-29 10:41:11 -08:00
mmap.c
mm: softdirty: add pgtable_supports_soft_dirty()
2025-11-24 15:08:54 -08:00
mmu_gather.c
treewide: include linux/pgalloc.h instead of asm/pgalloc.h
2025-11-16 17:28:25 -08:00
mmu_notifier.c
Update Christoph's Email address and make it consistent
2025-05-12 23:50:31 -07:00
mmzone.c
mm: introduce memdesc_flags_t
2025-09-13 16:55:07 -07:00
mprotect.c
mm: eliminate further swapops predicates
2025-11-24 15:08:52 -08:00
mremap.c
mm: softdirty: add pgtable_supports_soft_dirty()
2025-11-24 15:08:54 -08:00
mseal.c
mm: update vma_modify_flags() to handle residual flags, document
2025-11-20 13:43:58 -08:00
msync.c
…
nommu.c
mm/nommu: convert kobjsize() to folios
2025-09-13 16:54:46 -07:00
numa_emulation.c
mm: numa,memblock: Use SZ_1M macro to denote bytes to MB conversion
2025-08-20 16:31:23 +03:00
numa_memblks.c
mm: numa,memblock: Use SZ_1M macro to denote bytes to MB conversion
2025-08-20 16:31:23 +03:00
numa.c
mm/numa: remove unnecessary local variable in alloc_node_data()
2025-05-12 23:50:38 -07:00
oom_kill.c
mm: memcg: dump memcg protection info on oom or alloc failures
2025-11-20 13:43:59 -08:00
page_alloc.c
mm/page_alloc: optimize lowmem_reserve max lookup using its semantic monotonicity
2025-11-29 10:41:08 -08:00
page_counter.c
page_counter: track failcnt only for legacy cgroups
2025-03-17 00:05:35 -07:00
page_ext.c
mm,page_ext: derive the node from the pfn
2025-07-13 16:38:16 -07:00
page_frag_cache.c
mm/page_alloc: export free_frozen_pages() instead of free_unref_page()
2025-01-13 22:40:31 -08:00
page_idle.c
mm/rmap: extend rmap and migration support device-private entries
2025-11-24 15:08:48 -08:00
page_io.c
mm, swap: tidy up swap device and cluster info helpers
2025-09-21 14:22:23 -07:00
page_isolation.c
mm/page_isolation: drop __folio_test_movable() check for large folios
2025-07-13 16:38:29 -07:00
page_owner.c
mm/page_owner: simplify zone iteration logic in init_early_allocated_pages()
2025-11-16 17:28:01 -08:00
page_poison.c
…
page_reporting.c
…
page_reporting.h
…
page_table_check.c
mm: replace pmd_to_swp_entry() with softleaf_from_pmd()
2025-11-24 15:08:51 -08:00
page_vma_mapped.c
mm: eliminate further swapops predicates
2025-11-24 15:08:52 -08:00
page-writeback.c
memcg: remove __lruvec_stat_mod_folio
2025-11-24 15:08:54 -08:00
pagewalk.c
mm: eliminate further swapops predicates
2025-11-24 15:08:52 -08:00
percpu-internal.h
mm: remove CONFIG_MEMCG_KMEM
2024-07-10 12:14:54 -07:00
percpu-km.c
mm/mm/percpu-km: drop nth_page() usage within single allocation
2025-09-21 14:22:04 -07:00
percpu-stats.c
mm: remove outdated filename comment in percpu-stats.c
2025-07-13 16:38:23 -07:00
percpu-vm.c
kmsan: remove hard-coded GFP_KERNEL flags
2025-11-16 17:27:54 -08:00
percpu.c
percpu: fix race on alloc failed warning limit
2025-09-08 23:45:10 -07:00
pgalloc-track.h
…
pgtable-generic.c
mm/huge_memory: add device-private THP support to PMD operations
2025-11-24 15:08:48 -08:00
process_vm_access.c
mm: refactor mm_access() to not return NULL
2024-11-05 16:56:23 -08:00
pt_reclaim.c
treewide: include linux/pgalloc.h instead of asm/pgalloc.h
2025-11-16 17:28:25 -08:00
ptdump.c
mm/ptdump: replace READ_ONCE() with standard page table accessors
2025-11-16 17:27:52 -08:00
readahead.c
readahead: add trace points
2025-09-21 14:22:28 -07:00
rmap.c
memcg: remove __lruvec_stat_mod_folio
2025-11-24 15:08:54 -08:00
rodata_test.c
mm/rodata_test: verify test data is unchanged, rather than non-zero
2025-01-13 22:40:38 -08:00
secretmem.c
mm: add vma_desc_size(), vma_desc_pages() helpers
2025-11-16 17:28:11 -08:00
shmem_quota.c
shmem_quota: build the object file conditionally to the config option
2024-09-01 20:25:45 -07:00
shmem.c
memcg: remove __lruvec_stat_mod_folio
2025-11-24 15:08:54 -08:00
show_mem.c
mm: re-enable kswapd when memory pressure subsides or demotion is toggled
2025-09-21 14:22:29 -07:00
shrinker_debug.c
mm/shrinker: fix name consistency issue in shrinker_debugfs_rename()
2025-03-17 00:05:40 -07:00
shrinker.c
mm: shrinker: avoid memleak in alloc_shrinker_info
2024-10-31 20:27:04 -07:00
shuffle.c
…
shuffle.h
…
slab_common.c
mm: fix some typos in mm module
2025-11-16 17:27:52 -08:00
slab.h
Merge tag 'mm-stable-2025-10-01-19-00' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
2025-10-02 18:18:33 -07:00
slub.c
mm: remove reference to destructor in comment in calculate_sizes()
2025-11-16 17:28:15 -08:00
sparse-vmemmap.c
mm: replace READ_ONCE() with standard page table accessors
2025-11-16 17:27:56 -08:00
sparse.c
mm: introduce memdesc_nid()
2025-09-13 16:55:07 -07:00
swap_cgroup.c
mm: swap_cgroup: remove double initialization of locals
2025-03-17 22:06:58 -07:00
swap_state.c
mm, swap: remove redundant comment for read_swap_cache_async
2025-11-24 15:08:56 -08:00
swap_table.h
mm, swap: use a single page for swap table when the size fits
2025-09-21 14:22:25 -07:00
swap.c
mm: lru_add_drain_all() do local lru_add_drain() first
2025-09-21 14:22:32 -07:00
swap.h
mm/migrate, swap: drop usage of folio_index
2025-11-16 17:28:20 -08:00
swapfile.c
mm/swapfile: use plist_for_each_entry in __folio_throttle_swaprate
2025-11-29 10:41:11 -08:00
truncate.c
mm/truncate: unmap large folio on split failure
2025-11-09 21:19:43 -08:00
usercopy.c
mm: security: Check early if HARDENED_USERCOPY is enabled
2025-02-28 11:51:31 -08:00
userfaultfd.c
mm: softdirty: add pgtable_supports_soft_dirty()
2025-11-24 15:08:54 -08:00
util.c
mm: add ability to take further action in vm_area_desc
2025-11-16 17:28:12 -08:00
vma_exec.c
mm: softdirty: add pgtable_supports_soft_dirty()
2025-11-24 15:08:54 -08:00
vma_init.c
Merge tag 'mm-stable-2025-10-01-19-00' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
2025-10-02 18:18:33 -07:00
vma_internal.h
mm/vma: move brk() internals to mm/vma.c
2025-01-13 22:40:42 -08:00
vma.c
mm: softdirty: add pgtable_supports_soft_dirty()
2025-11-24 15:08:54 -08:00
vma.h
mm: implement sticky VMA flags
2025-11-20 13:43:58 -08:00
vmalloc.c
mm/vmalloc: cleanup gfp flag use in new_vmap_block()
2025-11-24 15:08:54 -08:00
vmpressure.c
memcg: convert memcg->socket_pressure to u64
2025-07-24 19:12:32 -07:00
vmscan.c
mm/vmscan: skip increasing kswapd_failures when reclaim was boosted
2025-11-29 10:41:07 -08:00
vmstat.c
mm: vmstat: correct the comment above preempt_disable_nested()
2025-11-20 13:43:59 -08:00
workingset.c
memcg: remove inc/dec_lruvec_kmem_state helpers
2025-11-29 10:41:10 -08:00
zpdesc.h
mm: zpdesc: minor naming and comment corrections
2025-09-21 14:21:59 -07:00
zsmalloc.c
mm: remove unused zpool layer
2025-09-21 14:21:59 -07:00
zswap.c
mm/zswap: s/red-black tree/xarray/
2025-11-16 17:27:57 -08:00