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 |
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hvc | ||
ipwireless | ||
serdev | ||
serial | ||
vt | ||
Kconfig | -rw-r--r-- | 14.1 KB |
Makefile | -rw-r--r-- | 1.0 KB |
amiserial.c | -rw-r--r-- | 40.3 KB |
ehv_bytechan.c | -rw-r--r-- | 21.7 KB |
goldfish.c | -rw-r--r-- | 12.0 KB |
mips_ejtag_fdc.c | -rw-r--r-- | 35.2 KB |
moxa.c | -rw-r--r-- | 60.6 KB |
mxser.c | -rw-r--r-- | 48.7 KB |
n_gsm.c | -rw-r--r-- | 101.6 KB |
n_hdlc.c | -rw-r--r-- | 22.3 KB |
n_null.c | -rw-r--r-- | 1.3 KB |
n_tty.c | -rw-r--r-- | 64.0 KB |
nozomi.c | -rw-r--r-- | 45.9 KB |
pty.c | -rw-r--r-- | 24.0 KB |
rpmsg_tty.c | -rw-r--r-- | 6.9 KB |
synclink_gt.c | -rw-r--r-- | 127.9 KB |
sysrq.c | -rw-r--r-- | 27.7 KB |
tty.h | -rw-r--r-- | 4.2 KB |
tty_audit.c | -rw-r--r-- | 5.6 KB |
tty_baudrate.c | -rw-r--r-- | 5.9 KB |
tty_buffer.c | -rw-r--r-- | 18.0 KB |
tty_io.c | -rw-r--r-- | 89.5 KB |
tty_ioctl.c | -rw-r--r-- | 24.9 KB |
tty_jobctrl.c | -rw-r--r-- | 14.6 KB |
tty_ldisc.c | -rw-r--r-- | 20.2 KB |
tty_ldsem.c | -rw-r--r-- | 10.5 KB |
tty_mutex.c | -rw-r--r-- | 994 bytes |
tty_port.c | -rw-r--r-- | 21.4 KB |
ttynull.c | -rw-r--r-- | 2.3 KB |
vcc.c | -rw-r--r-- | 22.1 KB |
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