KVM: s390: Fix potential tiny kernel stack leak

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In some circumstances, one bit of kernel stack could have been leaked
from dat_cond_set_storage_key().

Fix by clearing prev before use.

Fixes: 8e03e8316e ("KVM: s390: KVM page table management functions: storage keys")
Reviewed-by: Christian Borntraeger <borntraeger@linux.ibm.com>
Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Message-ID: <20260812104436.109741-9-imbrenda@linux.ibm.com>

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Claudio Imbrenda 2026-08-12 12:44:35 +02:00

parent 6b1130e1b4

commit 30300ec278

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arch/s390/kvm/dat.c

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