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| author | Bharata B Rao <bharata@linux.vnet.ibm.com> | 2015-09-01 09:53:52 +1000 |
|---|---|---|
| committer | David Gibson <david@gibson.dropbear.id.au> | 2015-09-23 10:51:09 +1000 |
| commit | e6fc9568c865f2f81499475a4e322cd563fdfd90 (patch) | |
| tree | 7ddd4c2bf817ccfe12d5c3213d06777e97429e38 | |
| parent | aaf87c6616370685a7cff6a21616fc5db7495014 (diff) | |
| download | qemu-e6fc9568c865f2f81499475a4e322cd563fdfd90.zip qemu-e6fc9568c865f2f81499475a4e322cd563fdfd90.tar.gz qemu-e6fc9568c865f2f81499475a4e322cd563fdfd90.tar.bz2 | |
spapr_rtas: Prevent QEMU crash during hotplug without a prior device_add
If drmgr is used in the guest to hotplug a device before a device_add
has been issued via the QEMU monitor, QEMU segfaults in configure_connector
call. This occurs due to accessing of NULL FDT which otherwise would have
been created and associated with the DRC during device_add command.
Check for NULL FDT and return failure from configure_connector call.
As per PAPR+, an error value of -9003 seems appropriate for this failure.
Signed-off-by: Bharata B Rao <bharata@linux.vnet.ibm.com>
Cc: Michael Roth <mdroth@linux.vnet.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
| -rw-r--r-- | hw/ppc/spapr_rtas.c | 6 | ||||
| -rw-r--r-- | include/hw/ppc/spapr_drc.h | 15 |
2 files changed, 14 insertions, 7 deletions
diff --git a/hw/ppc/spapr_rtas.c b/hw/ppc/spapr_rtas.c index 5cbf9a0..2f8e25c 100644 --- a/hw/ppc/spapr_rtas.c +++ b/hw/ppc/spapr_rtas.c @@ -522,6 +522,12 @@ static void rtas_ibm_configure_connector(PowerPCCPU *cpu, drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc); fdt = drck->get_fdt(drc, NULL); + if (!fdt) { + DPRINTF("rtas_ibm_configure_connector: Missing FDT for DRC index: %xh\n", + drc_index); + rc = SPAPR_DR_CC_RESPONSE_NOT_CONFIGURABLE; + goto out; + } ccs = spapr_ccs_find(spapr, drc_index); if (!ccs) { diff --git a/include/hw/ppc/spapr_drc.h b/include/hw/ppc/spapr_drc.h index 60cda35..28ffeae 100644 --- a/include/hw/ppc/spapr_drc.h +++ b/include/hw/ppc/spapr_drc.h @@ -119,13 +119,14 @@ typedef enum { } sPAPRDREntitySense; typedef enum { - SPAPR_DR_CC_RESPONSE_NEXT_SIB = 1, /* currently unused */ - SPAPR_DR_CC_RESPONSE_NEXT_CHILD = 2, - SPAPR_DR_CC_RESPONSE_NEXT_PROPERTY = 3, - SPAPR_DR_CC_RESPONSE_PREV_PARENT = 4, - SPAPR_DR_CC_RESPONSE_SUCCESS = 0, - SPAPR_DR_CC_RESPONSE_ERROR = -1, - SPAPR_DR_CC_RESPONSE_CONTINUE = -2, + SPAPR_DR_CC_RESPONSE_NEXT_SIB = 1, /* currently unused */ + SPAPR_DR_CC_RESPONSE_NEXT_CHILD = 2, + SPAPR_DR_CC_RESPONSE_NEXT_PROPERTY = 3, + SPAPR_DR_CC_RESPONSE_PREV_PARENT = 4, + SPAPR_DR_CC_RESPONSE_SUCCESS = 0, + SPAPR_DR_CC_RESPONSE_ERROR = -1, + SPAPR_DR_CC_RESPONSE_CONTINUE = -2, + SPAPR_DR_CC_RESPONSE_NOT_CONFIGURABLE = -9003, } sPAPRDRCCResponse; typedef void (spapr_drc_detach_cb)(DeviceState *d, void *opaque); |