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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 /block/blk-flush.c | |
| parent | 2e7babfa892a55588467ef03b545002e32f31528 (diff) | |
| download | op-kernel-dev-338c7dbadd2671189cec7faf64c84d01071b3f96.zip op-kernel-dev-338c7dbadd2671189cec7faf64c84d01071b3f96.tar.gz | |
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 'block/blk-flush.c')
0 files changed, 0 insertions, 0 deletions
