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| author |   Andy Honig <ahonig@google.com> | 2013-11-18 16:09:22 -0800 |
|---|---|---|
| committer |   Paolo Bonzini <pbonzini@redhat.com> | 2013-12-12 22:39:33 +0100 |
| commit | 338c7dbadd2671189cec7faf64c84d01071b3f96 (patch) | |
| tree | f8aa565a09db010f6a5693051197bcb75073108a /arch/x86 | |
| parent | Merge branch 'for_linus' of git://cavan.codon.org.uk/platform-drivers-x86 (diff) | |
| download | linux-dev-338c7dbadd2671189cec7faf64c84d01071b3f96.tar.xz linux-dev-338c7dbadd2671189cec7faf64c84d01071b3f96.zip | |
KVM: Improve create VCPU parameter (CVE-2013-4587)
In multiple functions the vcpu_id is used as an offset into a bitfield. Ag
malicious user could specify a vcpu_id greater than 255 in order to set or
clear bits in kernel memory. This could be used to elevate priveges in the
kernel. This patch verifies that the vcpu_id provided is less than 255.
The api documentation already specifies that the vcpu_id must be less than
max_vcpus, but this is currently not checked.
Reported-by: Andrew Honig <ahonig@google.com>
Cc: stable@vger.kernel.org
Signed-off-by: Andrew Honig <ahonig@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86')
0 files changed, 0 insertions, 0 deletions