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authorAndy Honig <ahonig@google.com>2013-11-19 00:09:22 (GMT)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-12-20 15:48:52 (GMT)
commit41fe7fa8fdeaa5a2a9f3ecaa9a47e2d2afa1b2b1 (patch)
tree4ceafd36788afd201d7dad75fb35f4f7ac3a4af0 /net/mpls/Kconfig
parent2925f142d855585427a63da50744766a47659e0f (diff)
downloadlinux-fsl-qoriq-41fe7fa8fdeaa5a2a9f3ecaa9a47e2d2afa1b2b1.tar.xz
KVM: Improve create VCPU parameter (CVE-2013-4587)
commit 338c7dbadd2671189cec7faf64c84d01071b3f96 upstream. 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> Signed-off-by: Andrew Honig <ahonig@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/mpls/Kconfig')
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