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hw/net/can: Fix segfaults when using the devices without bus

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The CAN devices can currently be used to crash QEMU, e.g.:

$ x86_64-softmmu/qemu-system-x86_64 -device kvaser_pci
Segmentation fault (core dumped)

So we've got to add a proper check here that the corresponding
bus is available.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <1521193892-15552-2-git-send-email-thuth@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Thomas Huth 2018-03-16 10:51:29 +01:00 committed by Paolo Bonzini
parent 4e286099fe
commit 089eac81e1
1 changed files with 4 additions and 0 deletions
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4
hw/net/can/can_sja1000.c
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@ -866,6 +866,10 @@ int can_sja_connect_to_bus(CanSJA1000State *s, CanBusState *bus)
{
s->bus_client.info = &can_sja_bus_client_info;
if (!bus) {
return -EINVAL;
}
if (can_bus_insert_client(bus, &s->bus_client) < 0) {
return -1;
}