KVM: s390: Fix gmap_helper_zap_one_page() again

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A few checks were missing in gmap_helper_zap_one_page(), which can lead
to memory corruption in the guest under specific circumstances.

Add the missing checks.

Fixes: 5deafa27d9 ("KVM: s390: Fix to clear PTE when discarding a swapped page")
Cc: stable@vger.kernel.org
Reported-by: Marc Hartmayer <mhartmay@linux.ibm.com>
Tested-by: Marc Hartmayer <mhartmay@linux.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@linux.ibm.com>
Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>

...

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Claudio Imbrenda 2025-11-04 16:40:48 +01:00 • committed by Heiko Carstens

parent f770950a47

commit 2f393c228c

1 changed files with 7 additions and 2 deletions

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arch/s390/mm/gmap_helpers.c

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