path: root/arch
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authorZelin Deng <zelin.deng@linux.alibaba.com>2021-09-29 13:13:49 +0800
committerPaolo Bonzini <pbonzini@redhat.com>2021-09-30 04:08:15 -0400
commit773e89ab0056aaa2baa1ffd9f044551654410104 (patch)
tree21f02e8fab3cd99d60b240830e0b7e2897ada3df /arch
parentad9af930680bb396c87582edc172b3a7cf2a3fbf (diff)
ptp: Fix ptp_kvm_getcrosststamp issue for x86 ptp_kvm
hv_clock is preallocated to have only HVC_BOOT_ARRAY_SIZE (64) elements; if the PTP_SYS_OFFSET_PRECISE ioctl is executed on vCPUs whose index is 64 of higher, retrieving the struct pvclock_vcpu_time_info pointer with "src = &hv_clock[cpu].pvti" will result in an out-of-bounds access and a wild pointer. Change it to "this_cpu_pvti()" which is guaranteed to be valid. Fixes: 95a3d4454bb1 ("Switch kvmclock data to a PER_CPU variable") Signed-off-by: Zelin Deng <zelin.deng@linux.alibaba.com> Cc: <stable@vger.kernel.org> Message-Id: <1632892429-101194-3-git-send-email-zelin.deng@linux.alibaba.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch')
0 files changed, 0 insertions, 0 deletions

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