From: Pierre Morel pmorel@linux.ibm.com
[ Upstream commit 246be7d2720ea9a795b576067ecc5e5c7a1e7848 ]
bit_and() uses the count of bits as the woking length. Fix the previous implementation and effectively use the right bitmap size.
Fixes: 19fd83a64718 ("KVM: s390: vsie: allow CRYCB FORMAT-1") Fixes: 56019f9aca22 ("KVM: s390: vsie: Allow CRYCB FORMAT-2")
Signed-off-by: Pierre Morel pmorel@linux.ibm.com Reviewed-by: Janosch Frank frankja@linux.ibm.com Link: https://lore.kernel.org/kvm/20230511094719.9691-1-pmorel@linux.ibm.com/ Signed-off-by: Janosch Frank frankja@linux.ibm.com Signed-off-by: Sasha Levin sashal@kernel.org --- arch/s390/kvm/vsie.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/arch/s390/kvm/vsie.c b/arch/s390/kvm/vsie.c index 8d6b765abf29b..0333ee482eb89 100644 --- a/arch/s390/kvm/vsie.c +++ b/arch/s390/kvm/vsie.c @@ -177,7 +177,8 @@ static int setup_apcb00(struct kvm_vcpu *vcpu, unsigned long *apcb_s, sizeof(struct kvm_s390_apcb0))) return -EFAULT;
- bitmap_and(apcb_s, apcb_s, apcb_h, sizeof(struct kvm_s390_apcb0)); + bitmap_and(apcb_s, apcb_s, apcb_h, + BITS_PER_BYTE * sizeof(struct kvm_s390_apcb0));
return 0; } @@ -203,7 +204,8 @@ static int setup_apcb11(struct kvm_vcpu *vcpu, unsigned long *apcb_s, sizeof(struct kvm_s390_apcb1))) return -EFAULT;
- bitmap_and(apcb_s, apcb_s, apcb_h, sizeof(struct kvm_s390_apcb1)); + bitmap_and(apcb_s, apcb_s, apcb_h, + BITS_PER_BYTE * sizeof(struct kvm_s390_apcb1));
return 0; }