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amd_iommu: Fix amdvi_realize() error API violation 

The Error ** argument must be NULL, &error_abort, &error_fatal, or a
pointer to a variable containing NULL.  Passing an argument of the
latter kind twice without clearing it in between is wrong: if the
first call sets an error, it no longer points to NULL for the second
call.

amdvi_realize() is wrong that way: it passes @errp to qdev_realize(),
object_property_get_int(), and msi_init() without checking it.  I
can't tell offhand whether qdev_realize() can fail here.  Fix by
checking it for failure.  object_property_get_int() can't.  Fix by
passing &error_abort instead.

Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20200630090351.1247703-22-armbru@redhat.com>
This commit is contained in:
Markus Armbruster 2020-06-30 11:03:46 +02:00
parent 18d588fe1e
commit 475fc97d09
1 changed files with 4 additions and 2 deletions
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6
hw/i386/amd_iommu.c
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@ -1549,7 +1549,9 @@ static void amdvi_realize(DeviceState *dev, Error **errp)
/* This device should take care of IOMMU PCI properties */
x86_iommu->type = TYPE_AMD;
qdev_realize(DEVICE(&s->pci), &bus->qbus, errp);
if (!qdev_realize(DEVICE(&s->pci), &bus->qbus, errp)) {
return;
}
ret = pci_add_capability(&s->pci.dev, AMDVI_CAPAB_ID_SEC, 0,
AMDVI_CAPAB_SIZE, errp);
if (ret < 0) {
@ -1578,7 +1580,7 @@ static void amdvi_realize(DeviceState *dev, Error **errp)
sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->mmio);
sysbus_mmio_map(SYS_BUS_DEVICE(s), 0, AMDVI_BASE_ADDR);
pci_setup_iommu(bus, amdvi_host_dma_iommu, s);
s->devid = object_property_get_int(OBJECT(&s->pci), "addr", errp);
s->devid = object_property_get_int(OBJECT(&s->pci), "addr", &error_abort);
msi_init(&s->pci.dev, 0, 1, true, false, errp);
amdvi_init(s);
}