mm: lock a vma before stack expansion

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commit c137381f71 upstream.

With recent changes necessitating mmap_lock to be held for write while
expanding a stack, per-VMA locks should follow the same rules and be
write-locked to prevent page faults into the VMA being expanded. Add
the necessary locking.

Cc: stable@vger.kernel.org
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Suren Baghdasaryan 2023-07-08 12:12:10 -07:00 • committed by Greg Kroah-Hartman

parent d7defc5b8d

commit 10bef9542a

1 changed files with 4 additions and 0 deletions

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mm/mmap.c

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