Re: [PULL 00/20] pc,virtio,pci: fixes, features

[Michael S. Tsirkin]

On Mon, Mar 22, 2021 at 04:41:01PM +0000, Peter Maydell wrote:
> On Mon, 22 Mar 2021 at 15:44, Michael S. Tsirkin <mst@redhat.com> wrote:
> >
> > The following changes since commit f0f20022a0c744930935fdb7020a8c18347d391a:
> >
> >   Merge remote-tracking branch 
> > 'remotes/thuth-gitlab/tags/pull-request-2021-03-21' into staging 
> > (2021-03-22 10:05:45 +0000)
> >
> > are available in the Git repository at:
> >
> >   git://git.kernel.org/pub/scm/virt/kvm/mst/qemu.git tags/for_upstream
> >
> > for you to fetch changes up to 5971d4a968d51a80daaad53ddaec2b285115af62:
> >
> >   acpi: Move setters/getters of oem fields to X86MachineState (2021-03-22 
> > 11:39:02 -0400)
> >
> > ----------------------------------------------------------------
> > pc,virtio,pci: fixes, features
> >
> > Fixes all over the place.
> > ACPI index support.
> >
> > Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
> >
> 
> This triggers a new clang runtime sanitizer warning:
> 
> MALLOC_PERTURB_=${MALLOC_PERTURB_:-$(( ${RANDOM:-0} % 255 + 1))}
> QTEST_QEMU_IMG=./qemu-img
> G_TEST_DBUS_DAEMON=/home/petmay01/linaro/qemu-for-merges/tests/dbus-vmstate-daemon.sh
> QTEST_QEMU_BINARY=./qemu-system-mips64el tests/qtest/qom-test --tap -k
> PASS 1 qtest-mips64el/qom-test /mips64el/qom/loongson3-virt
> PASS 2 qtest-mips64el/qom-test /mips64el/qom/none
> PASS 3 qtest-mips64el/qom-test /mips64el/qom/magnum
> PASS 4 qtest-mips64el/qom-test /mips64el/qom/mipssim
> PASS 5 qtest-mips64el/qom-test /mips64el/qom/malta
> ../../hw/pci/pci.c:252:30: runtime error: shift exponent -1 is negative
> PASS 6 qtest-mips64el/qom-test /mips64el/qom/fuloong2e
> PASS 7 qtest-mips64el/qom-test /mips64el/qom/boston
> PASS 8 qtest-mips64el/qom-test /mips64el/qom/pica61
> 
> and similarly for eg
> 
> MALLOC_PERTURB_=${MALLOC_PERTURB_:-$(( ${RANDOM:-0} % 255 + 1))}
> QTEST_QEMU_IMG=./qemu-img
> G_TEST_DBUS_DAEMON=/home/petmay01/linaro/qemu-for-merges/tests/dbus-vmstate-daemon.sh
> QTEST_QEMU_BINARY=./qemu-system-mips64el tests/qtest/endianness-test
> --tap -k
> ../../hw/pci/pci.c:252:30: runtime error: shift exponent -1 is negative
> PASS 1 qtest-mips64el/endianness-test /mips64el/endianness/fuloong2e
> ../../hw/pci/pci.c:252:30: runtime error: shift exponent -1 is negative
> PASS 2 qtest-mips64el/endianness-test /mips64el/endianness/split/fuloong2e
> ../../hw/pci/pci.c:252:30: runtime error: shift exponent -1 is negative
> PASS 3 qtest-mips64el/endianness-test /mips64el/endianness/combine/fuloong2e
> 
> thanks
> -- PMM

Weird I don't see any related changes. Something subtle going on.
I'd like to reproduce this.
Which clang flags do you use?

-- 
MST