s390/mm: Use lock_mm_and_find_vma() in do_secure_storage_access()

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do_secure_storage_access() uses find_vma() without verifying that the
faulting address is within the returned vma. Add this missing check by
converting to lock_mm_and_find_vma().

This is not a critical fix, since the worst that could happen is a
WARN_ON_ONCE() in folio_walk_start().

Reported-by: sashiko-bot <sashiko-bot@kernel.org>
Closes: https://lore.kernel.org/all/20260717093904.E4A421F00A3E@smtp.kernel.org/
Link: https://lore.kernel.org/all/20260717093904.E4A421F00A3E@smtp.kernel.org/
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>

...

This commit is contained in:

Heiko Carstens 2026-07-20 10:58:29 +02:00 • committed by Vasily Gorbik

parent 7cf227b270

commit 79ef8d384f

1 changed files with 2 additions and 3 deletions

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arch/s390/mm/fault.c

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