[libvirt] [PATCH] qemu: monitor: Don't bother extracting vCPU halted state in text monitor

Peter Krempa pkrempa at redhat.com
Thu May 18 11:47:03 UTC 2017

The code causes the 'offset' variable to be overwritten (possibly with
NULL if neither of the vCPUs is halted) which causes a crash since the
variable is still used after that part.

Additionally there's a bug, since strstr() would look up the '(halted)'
string in the whole string rather than just the currently processed line
the returned data is completely bogus.

Rather than switching to single line parsing let's remove the code
altogether since it has a commonly used JSON monitor alternative and
the data itself is not very useful to report.

The code was introduced in commit cc5e695bde

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1452106
 src/qemu/qemu_monitor_text.c | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/src/qemu/qemu_monitor_text.c b/src/qemu/qemu_monitor_text.c
index 9c9eeea01..66c94fbcd 100644
--- a/src/qemu/qemu_monitor_text.c
+++ b/src/qemu/qemu_monitor_text.c
@@ -552,12 +552,6 @@ qemuMonitorTextQueryCPUs(qemuMonitorPtr mon,
         cpu.qemu_id = cpuid;
         cpu.tid = tid;

-        /* Extract halted indicator */
-        if ((offset = strstr(line, "(halted)")) != NULL)
-            cpu.halted = true;
-        else
-            cpu.halted = false;
         if (VIR_APPEND_ELEMENT_COPY(cpus, ncpus, cpu) < 0) {
             ret = -1;
             goto cleanup;

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