KVM MMU: check pending exception before injecting APF

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commit 2a266f2355 upstream.

For example, when two APF's for page ready happen after one exit and
the first one becomes pending, the second one will result in #DF.
Instead, just handle the second page fault synchronously.

Reported-by: Ross Zwisler <zwisler@gmail.com>
Message-ID: <CAOxpaSUBf8QoOZQ1p4KfUp0jq76OKfGY4Uxs-Gg8ngReD99xww@mail.gmail.com>
Reported-by: Alec Blayne <ab@tevsa.net>
Signed-off-by: Haozhong Zhang <haozhong.zhang@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

This commit is contained in:

Haozhong Zhang 2018-01-10 21:44:42 +08:00 • committed by Greg Kroah-Hartman

parent 4c54eab372

commit fea5349eb8

1 changed files with 2 additions and 1 deletions

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arch/x86/kvm/mmu.c

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