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mm: prevent userfaults to be handled under per-vma lock
authorSuren Baghdasaryan <surenb@google.com>
Mon, 27 Feb 2023 17:36:26 +0000 (09:36 -0800)
committerAndrew Morton <akpm@linux-foundation.org>
Wed, 5 Apr 2023 23:02:11 +0000 (16:02 -0700)
commit1692a6ebc9df3b97a5316b7aba2116ced4280bd4
tree3e1948728cdfb374c37f970353707a6e6cbdf6b6tree
parentee2129efc20178c5e6bbeb838277227a616d4d17commit | diff
mm: prevent userfaults to be handled under per-vma lock

Due to the possibility of handle_userfault dropping mmap_lock, avoid fault
handling under VMA lock and retry holding mmap_lock.  This can be handled
more gracefully in the future.

Link: https://lkml.kernel.org/r/20230227173632.3292573-28-surenb@google.com
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Suggested-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
mm/memory.c diff | blob | history
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