KVM: SVM: Fix sev_pin_memory() error handling

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The sev_pin_memory() function was modified to return error pointers
instead of NULL but there are two problems.  The first problem is that
if "npages" is zero then it still returns NULL.  Secondly, several of
the callers were not updated to check for error pointers instead of
NULL.

Either one of these issues will lead to an Oops.

Fixes: a8d908b587 ("KVM: x86: report sev_pin_memory errors with PTR_ERR")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Message-Id: <20200714142351.GA315374@mwanda>
Reviewed-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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Dan Carpenter 2020-07-14 17:23:51 +03:00 • committed by Paolo Bonzini

parent a445fc457d

commit ff2bd9ff11

1 changed files with 10 additions and 10 deletions

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arch/x86/kvm/svm/sev.c

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