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qemu: avoid null deref on block pull error
Coverity detected that 5 of 6 callers of virJSONValueArrayGet checked for a NULL return; and that by not checking we risk a null deref during an error. The error is unlikely since the prior call to virJSONValueArraySize would probably have already caught any botched JSON array parse, but better safe than sorry. * src/qemu/qemu_monitor_json.c (qemuMonitorJSONGetBlockJobInfo): Check for NULL. (qemuMonitorJSONExtractPtyPaths): Fix typo.
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@ -1018,7 +1018,7 @@ qemuMonitorJSONExtractCPUInfo(virJSONValuePtr reply,
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int thread;
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if (!entry) {
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qemuReportError(VIR_ERR_INTERNAL_ERROR, "%s",
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_("character device information was missing aray element"));
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_("character device information was missing array element"));
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goto cleanup;
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}
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@ -2266,7 +2266,7 @@ static int qemuMonitorJSONExtractPtyPaths(virJSONValuePtr reply,
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const char *id;
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if (!entry) {
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qemuReportError(VIR_ERR_INTERNAL_ERROR, "%s",
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_("character device information was missing aray element"));
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_("character device information was missing array element"));
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goto cleanup;
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}
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@ -2855,6 +2855,11 @@ static int qemuMonitorJSONGetBlockJobInfo(virJSONValuePtr reply,
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for (i = 0; i < nr_results; i++) {
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virJSONValuePtr entry = virJSONValueArrayGet(data, i);
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if (!entry) {
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qemuReportError(VIR_ERR_INTERNAL_ERROR, "%s",
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_("missing array element"));
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return -1;
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}
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if (qemuMonitorJSONGetBlockJobInfoOne(entry, device, info) == 0)
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return 1;
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}
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