Revision 773e89ab0056aaa2baa1ffd9f044551654410104 authored by Zelin Deng on 29 September 2021, 05:13:49 UTC, committed by Paolo Bonzini on 30 September 2021, 08:08:15 UTC
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>
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