Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
KVM: s390: ucontrol: Fix memslot handling
Fix memslots handling for UCONTROL guests. Attempts to delete user
memslots will fail, as they should, without the risk of a NULL pointer
dereference.
Fixes: 413c98f24c63 ("KVM: s390: fake memslot for ucontrol VMs")
Reviewed-by: Steffen Eiden <seiden@linux.ibm.com>
Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
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arch/s390/kvm/kvm-s390.c
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arch/s390/kvm/kvm-s390.c
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struct kvm_memory_slot *new,
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enum kvm_mr_change change)
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{
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-
if (kvm_is_ucontrol(kvm) && new->id < KVM_USER_MEM_SLOTS)
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+
if (kvm_is_ucontrol(kvm) && new && new->id < KVM_USER_MEM_SLOTS)
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return -EINVAL;
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/* When we are protected, we should not change the memory slots */