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spapr_drc.c: do not error_report() when drc->dev->id == NULL

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The error_report() call in drc_unisolate_logical() is not considering
that drc->dev->id can be NULL, and the underlying functions error_report()
calls to do its job (vprintf(), g_strdup_printf() ...) has undefined
behavior when trying to handle "%s" with NULL arguments.

Besides, there is no utility into reporting that an unknown device was
rejected by the guest.

Acked-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Greg Kurz <groug@kaod.org>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <20210907004755.424931-4-danielhb413@gmail.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Daniel Henrique Barboza 2021-09-06 21:47:51 -03:00 committed by David Gibson
parent 44d886abab
commit 91bd95ce16
1 changed files with 5 additions and 2 deletions
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7
hw/ppc/spapr_drc.c
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@ -167,8 +167,11 @@ static uint32_t drc_unisolate_logical(SpaprDrc *drc)
} }
drc->unplug_requested = false; drc->unplug_requested = false;
error_report("Device hotunplug rejected by the guest "
"for device %s", drc->dev->id); if (drc->dev->id) {
error_report("Device hotunplug rejected by the guest "
"for device %s", drc->dev->id);
}
/* /*
* TODO: send a QAPI DEVICE_UNPLUG_ERROR event when * TODO: send a QAPI DEVICE_UNPLUG_ERROR event when