Revision e700898fa075c69b3ae02b702ab57fb75e1a82ec authored by Mike Kravetz on 12 December 2022, 23:50:41 UTC, committed by Andrew Morton on 21 December 2022, 22:31:52 UTC
Commit bbff39cc6cbc ("hugetlb: allocate vma lock for all sharable vmas") removed the pmd sharable checks in the vma lock helper routines. However, it left the functional version of helper routines behind #ifdef CONFIG_ARCH_WANT_HUGE_PMD_SHARE. Therefore, the vma lock is not being used for sharable vmas on architectures that do not support pmd sharing. On these architectures, a potential fault/truncation race is exposed that could leave pages in a hugetlb file past i_size until the file is removed. Move the functional vma lock helpers outside the ifdef, and remove the non-functional stubs. Since the vma lock is not just for pmd sharing, rename the routine __vma_shareable_flags_pmd. Link: https://lkml.kernel.org/r/20221212235042.178355-1-mike.kravetz@oracle.com Fixes: bbff39cc6cbc ("hugetlb: allocate vma lock for all sharable vmas") Signed-off-by: Mike Kravetz <mike.kravetz@oracle.com> Reviewed-by: Miaohe Lin <linmiaohe@huawei.com> Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com> Cc: David Hildenbrand <david@redhat.com> Cc: James Houghton <jthoughton@google.com> Cc: Mina Almasry <almasrymina@google.com> Cc: Muchun Song <songmuchun@bytedance.com> Cc: Naoya Horiguchi <naoya.horiguchi@linux.dev> Cc: Peter Xu <peterx@redhat.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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File | Mode | Size |
---|---|---|
core | ||
Kconfig | -rw-r--r-- | 4.9 KB |
Makefile | -rw-r--r-- | 344 bytes |
acpi.c | -rw-r--r-- | 17.7 KB |
cxl.h | -rw-r--r-- | 22.5 KB |
cxlmem.h | -rw-r--r-- | 14.9 KB |
cxlpci.h | -rw-r--r-- | 2.4 KB |
mem.c | -rw-r--r-- | 5.4 KB |
pci.c | -rw-r--r-- | 18.9 KB |
pmem.c | -rw-r--r-- | 10.8 KB |
port.c | -rw-r--r-- | 3.4 KB |
security.c | -rw-r--r-- | 5.8 KB |
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