There are two places where curl_slist_append() is called but
corresponding call to curl_slist_free_all() is missing:
virCHMonitorPutNoContent() and virCHMonitorGet() which leads to
memleaks:

41 (16 direct, 25 indirect) bytes in 1 blocks are definitely lost in loss record 992 of 1,998
   at 0x4845888: malloc (vg_replace_malloc.c:446)
   by 0x5B2F8FE: curl_slist_append (in /usr/lib64/libcurl.so.4.8.0)
   by 0xB3A7B41: virCHMonitorPutNoContent (ch_monitor.c:824)
   by 0xB3A89FF: virCHMonitorBootVM (ch_monitor.c:1030)
   by 0xB3AC6F1: virCHProcessStart (ch_process.c:967)
   by 0xB39B7D4: chDomainCreateXML (ch_driver.c:246)
   by 0x4CC9D32: virDomainCreateXML (libvirt-domain.c:188)
   by 0x168F91: remoteDispatchDomainCreateXML (remote_daemon_dispatch_stubs.h:5186)
   by 0x168F18: remoteDispatchDomainCreateXMLHelper (remote_daemon_dispatch_stubs.h:5167)
   by 0x4B20066: virNetServerProgramDispatchCall (virnetserverprogram.c:423)
   by 0x4B1FB99: virNetServerProgramDispatch (virnetserverprogram.c:299)
   by 0x4B28B5E: virNetServerProcessMsg (virnetserver.c:135)

88 (16 direct, 72 indirect) bytes in 1 blocks are definitely lost in loss record 1,501 of 1,998
   at 0x4845888: malloc (vg_replace_malloc.c:446)
   by 0x5B2F8FE: curl_slist_append (in /usr/lib64/libcurl.so.4.8.0)
   by 0xB3A7E41: virCHMonitorGet (ch_monitor.c:864)
   by 0xB3A92E2: virCHMonitorGetInfo (ch_monitor.c:1157)
   by 0xB3A9CEA: virCHProcessUpdateInfo (ch_process.c:142)
   by 0xB3AAD36: virCHProcessSetup (ch_process.c:492)
   by 0xB3AC75A: virCHProcessStart (ch_process.c:973)
   by 0xB39B7D4: chDomainCreateXML (ch_driver.c:246)
   by 0x4CC9D32: virDomainCreateXML (libvirt-domain.c:188)
   by 0x168F91: remoteDispatchDomainCreateXML (remote_daemon_dispatch_stubs.h:5186)
   by 0x168F18: remoteDispatchDomainCreateXMLHelper (remote_daemon_dispatch_stubs.h:5167)
   by 0x4B20066: virNetServerProgramDispatchCall (virnetserverprogram.c:423)

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
---
 src/ch/ch_monitor.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/ch/ch_monitor.c b/src/ch/ch_monitor.c
index e0d6b490de..0ba927a194 100644
--- a/src/ch/ch_monitor.c
+++ b/src/ch/ch_monitor.c
@@ -839,6 +839,8 @@ virCHMonitorPutNoContent(virCHMonitor *mon, const char *endpoint,
     if (responseCode == 200 || responseCode == 204)
         ret = 0;
 
+    curl_slist_free_all(headers);
+
     return ret;
 }
 
@@ -884,6 +886,7 @@ virCHMonitorGet(virCHMonitor *mon, const char *endpoint, virJSONValue **response
 
  cleanup:
     g_free(data.content);
+    curl_slist_free_all(headers);
     /* reset the libcurl handle to avoid leaking a stack pointer to data */
     curl_easy_reset(mon->handle);
 
-- 
2.48.1

On Thu, Mar 13, 2025 at 14:44:34 +0100, Michal Privoznik wrote:
> There are two places where curl_slist_append() is called but
> corresponding call to curl_slist_free_all() is missing:
> virCHMonitorPutNoContent() and virCHMonitorGet() which leads to
> memleaks:
> 
> 41 (16 direct, 25 indirect) bytes in 1 blocks are definitely lost in loss record 992 of 1,998
>    at 0x4845888: malloc (vg_replace_malloc.c:446)
>    by 0x5B2F8FE: curl_slist_append (in /usr/lib64/libcurl.so.4.8.0)
>    by 0xB3A7B41: virCHMonitorPutNoContent (ch_monitor.c:824)
>    by 0xB3A89FF: virCHMonitorBootVM (ch_monitor.c:1030)
>    by 0xB3AC6F1: virCHProcessStart (ch_process.c:967)
>    by 0xB39B7D4: chDomainCreateXML (ch_driver.c:246)
>    by 0x4CC9D32: virDomainCreateXML (libvirt-domain.c:188)
>    by 0x168F91: remoteDispatchDomainCreateXML (remote_daemon_dispatch_stubs.h:5186)
>    by 0x168F18: remoteDispatchDomainCreateXMLHelper (remote_daemon_dispatch_stubs.h:5167)
>    by 0x4B20066: virNetServerProgramDispatchCall (virnetserverprogram.c:423)
>    by 0x4B1FB99: virNetServerProgramDispatch (virnetserverprogram.c:299)
>    by 0x4B28B5E: virNetServerProcessMsg (virnetserver.c:135)
> 
> 88 (16 direct, 72 indirect) bytes in 1 blocks are definitely lost in loss record 1,501 of 1,998
>    at 0x4845888: malloc (vg_replace_malloc.c:446)
>    by 0x5B2F8FE: curl_slist_append (in /usr/lib64/libcurl.so.4.8.0)
>    by 0xB3A7E41: virCHMonitorGet (ch_monitor.c:864)
>    by 0xB3A92E2: virCHMonitorGetInfo (ch_monitor.c:1157)
>    by 0xB3A9CEA: virCHProcessUpdateInfo (ch_process.c:142)
>    by 0xB3AAD36: virCHProcessSetup (ch_process.c:492)
>    by 0xB3AC75A: virCHProcessStart (ch_process.c:973)
>    by 0xB39B7D4: chDomainCreateXML (ch_driver.c:246)
>    by 0x4CC9D32: virDomainCreateXML (libvirt-domain.c:188)
>    by 0x168F91: remoteDispatchDomainCreateXML (remote_daemon_dispatch_stubs.h:5186)
>    by 0x168F18: remoteDispatchDomainCreateXMLHelper (remote_daemon_dispatch_stubs.h:5167)
>    by 0x4B20066: virNetServerProgramDispatchCall (virnetserverprogram.c:423)
> 
> Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
> ---
>  src/ch/ch_monitor.c | 3 +++
>  1 file changed, 3 insertions(+)

Reviewed-by: Peter Krempa <pkrempa@redhat.com>