https://github.com/torvalds/linux
Revision d61a12cb9af5b355a38e0c0106e91224b49195ce authored by Sean Christopherson on 13 December 2022, 00:16:42 UTC, committed by Paolo Bonzini on 27 December 2022, 11:00:46 UTC
Check that the number of pages per slot is non-zero in get_max_slots()
prior to computing the remaining number of pages.  clang generates code
that uses an actual DIV for calculating the remaining, which causes a #DE
if the total number of pages is less than the number of slots.

  traps: memslot_perf_te[97611] trap divide error ip:4030c4 sp:7ffd18ae58f0
         error:0 in memslot_perf_test[401000+cb000]

Fixes: a69170c65acd ("KVM: selftests: memslot_perf_test: Report optimal memory slots")
Signed-off-by: Sean Christopherson <seanjc@google.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20221213001653.3852042-4-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
1 parent 73441ef
History
Tip revision: d61a12cb9af5b355a38e0c0106e91224b49195ce authored by Sean Christopherson on 13 December 2022, 00:16:42 UTC
KVM: selftests: Fix divide-by-zero bug in memslot_perf_test
Tip revision: d61a12c
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