Peter Xu
f77aa56ad9
mm/hugetlb: fix F_SEAL_FUTURE_WRITE ...
commit 22247efd822e6d263f3c8bd327f3f769aea9b1d9 upstream.
Patch series "mm/hugetlb: Fix issues on file sealing and fork", v2.
Hugh reported issue with F_SEAL_FUTURE_WRITE not applied correctly to
hugetlbfs, which I can easily verify using the memfd_test program, which
seems that the program is hardly run with hugetlbfs pages (as by default
shmem).
Meanwhile I found another probably even more severe issue on that hugetlb
fork won't wr-protect child cow pages, so child can potentially write to
parent private pages. Patch 2 addresses that.
After this series applied, "memfd_test hugetlbfs" should start to pass.
This patch (of 2):
F_SEAL_FUTURE_WRITE is missing for hugetlb starting from the first day.
There is a test program for that and it fails constantly.
$ ./memfd_test hugetlbfs
memfd-hugetlb: CREATE
memfd-hugetlb: BASIC
memfd-hugetlb: SEAL-WRITE
memfd-hugetlb: SEAL-FUTURE-WRITE
mmap() didn't fail as expected
Aborted (core dumped)
I think it's probably because no one is really running the hugetlbfs test.
Fix it by checking FUTURE_WRITE also in hugetlbfs_file_mmap() as what we
do in shmem_mmap(). Generalize a helper for that.
Link: https://lkml.kernel.org/r/20210503234356.9097-1-peterx@redhat.com
Link: https://lkml.kernel.org/r/20210503234356.9097-2-peterx@redhat.com
Fixes: ab3948f58f
2021-05-19 10:08:29 +02:00
kasan: fix incorrect arguments passing in kasan_add_zero_shadow
2021-01-27 11:47:53 +01:00
bdi: add a ->dev_name field to struct backing_dev_info
2020-05-14 07:58:30 +02:00
cma: don't quit at first error when activating reserved areas
2020-09-03 11:26:51 +02:00
mm/compaction: fix misbehaviors of fast_find_migrateblock()
2021-03-04 10:26:39 +01:00
mm/debug.c: always print flags in dump_page()
2020-03-05 16:43:51 +01:00
mm/error_inject: Fix allow_error_inject function signatures.
2020-10-29 09:57:37 +01:00
mm/gup: fix gup_fast with dynamic page table folding
2020-10-01 13:18:24 +02:00
mm/gup: fix memory leak in __gup_benchmark_ioctl
2020-01-09 10:20:00 +01:00
mm: thp: fix MADV_REMOVE deadlock on shmem THP
2021-02-10 09:25:31 +01:00
mm/hugeltb: handle the error case in hugetlb_fix_reserve_counts()
2021-05-19 10:08:27 +02:00
mm: hugetlb: switch to css_tryget() in hugetlb_cgroup_charge_cgroup()
2019-11-15 18:34:00 -08:00
mm/init-mm.c: include <linux/mman.h> for vm_committed_as_batch
2019-10-19 06:32:32 -04:00
mm: drop mmap_sem before calling balance_dirty_pages() in write fault
2020-01-09 10:19:55 +01:00
mm/zsmalloc.c: drop ZSMALLOC_PGTABLE_MAPPING
2020-12-16 10:56:59 +01:00
khugepaged: fix wrong result value for trace_mm_collapse_huge_page_isolate()
2021-05-19 10:08:27 +02:00
mm/kmemleak.c: use address-of operator on section symbols
2020-10-01 13:17:53 +02:00
ksm: fix potential missing rmap_item for stable_node
2021-05-19 10:08:27 +02:00
mm: list_lru: set shrinker map bit when child nr_items is not zero
2020-12-11 13:23:31 +01:00
uaccess: Add non-pagefault user-space write function
2020-01-17 19:48:40 +01:00
mm: validate pmd after splitting
2020-10-01 13:18:21 +02:00
memblock: do not start bottom-up allocations with kernel_end
2021-02-10 09:25:28 +01:00
mm: memcg/slab: fix root memcg vmstats
2020-11-24 13:29:24 +01:00
mm/memory-failure: unnecessary amount of unmapping
2021-05-14 09:44:32 +02:00
mm: fix race by making init_zero_pfn() early_initcall
2021-04-07 14:47:42 +02:00
mm: don't rely on system state to detect hot-plug operations
2020-10-07 08:01:30 +02:00
mm: mempolicy: fix potential pte_unmap_unlock pte error
2020-11-10 12:37:27 +01:00
mm/memory_hotplug: shrink zones when offlining memory
2020-01-09 10:19:56 +01:00
mm/migrate.c: fix potential indeterminate pte entry in migrate_vma_insert_page()
2021-05-19 10:08:27 +02:00
mm/mmap.c: initialize align_offset explicitly for vm_unmapped_area
2020-10-01 13:17:54 +02:00
mm: fix kthread_use_mm() vs TLB invalidate
2020-09-03 11:26:51 +02:00
mm/mmu_gather: invalidate TLB correctly on batch allocation failure and flush
2020-02-11 04:35:42 -08:00
mm/mmu_notifiers: use the right return code for WARN_ON
2019-11-06 08:47:50 -08:00
mm, numa: fix bad pmd by atomically check for pmd_trans_huge when marking page tables prot_numa
2020-03-12 13:00:19 +01:00
mm: Fix mremap not considering huge pmd devmap
2020-06-07 13:18:46 +02:00
x86/mm: split vmalloc_sync_all()
2020-03-25 08:25:58 +01:00
mm, oom_adj: don't loop through tasks in __set_oom_adj when not necessary
2020-10-29 09:57:45 +01:00
mm/page-writeback.c: avoid potential division by zero in wb_min_max_ratio()
2020-01-23 08:22:41 +01:00
mm: don't wake kswapd prematurely when watermark boosting is disabled
2020-12-30 11:51:27 +01:00
mm/page_counter.c: fix protection usage propagation
2020-08-21 13:05:27 +02:00
swap: fix swapfile read/write offset
2021-03-07 12:20:49 +01:00
mm/memory_hotplug: drain per-cpu pages again during memory offline
2020-09-23 12:40:47 +02:00
mm/page_owner: change split_page_owner to take a count
2020-10-29 09:57:52 +01:00
mm: pagewalk: fix termination condition in walk_pte_range()
2020-10-01 13:17:30 +02:00
percpu: fix first chunk size calculation for populated bitmap
2020-09-23 12:40:45 +02:00
mm: include <linux/huge_mm.h> for is_vma_temporary_stack
2019-10-19 06:32:32 -04:00
mm/hugetlb: fix F_SEAL_FUTURE_WRITE
2021-05-19 10:08:29 +02:00
mm/shuffle: don't move pages between zones and don't read garbage memmaps
2020-09-03 11:26:51 +02:00
mm, debug_pagealloc: don't rely on static keys too early
2020-01-23 08:22:40 +01:00
mm: slab: make page_cgroup_ino() to recognize non-compound slab pages properly
2019-11-06 08:47:50 -08:00
mm: memcg/slab: fix memory leak at non-root kmem_cache destroy
2020-07-29 10:18:44 +02:00
Revert "mm, slub: consider rest of partial list if acquire_slab() fails"
2021-03-17 17:03:34 +01:00
mm/sparse: add the missing sparse_buffer_fini() in error branch
2021-05-14 09:44:32 +02:00
mm/swap_state: fix a data race in swapin_nr_pages
2020-10-01 13:18:08 +02:00
swap: fix swapfile read/write offset
2021-03-07 12:20:49 +01:00
mm/thp: allow dropping THP from page cache
2019-10-19 06:32:33 -04:00
hugetlbfs: hugetlb_fault_mutex_hash() cleanup
2021-03-30 14:35:19 +02:00
mm: add kvfree_sensitive() for freeing sensitive data objects
2020-06-17 16:40:23 +02:00
mm/vunmap: add cond_resched() in vunmap_pmd_range
2020-09-03 11:26:52 +02:00
mm/vmscan.c: fix data races using kswapd_classzone_idx
2020-10-01 13:17:53 +02:00
mm, vmstat: reduce zone->lock holding time by /proc/pagetypeinfo
2019-11-06 08:47:50 -08:00
zsmalloc: account the number of compacted pages correctly
2021-03-07 12:20:49 +01:00
f77aa56ad9