File 823a62ec-qemu-fix-undefine-crash.patch of Package libvirt.29155

commit 823a62ec8aac4fb75e6e281164f3eb56ae47597c
Author: Boris Fiuczynski <fiuczy@linux.ibm.com>
Date:   Tue Mar 1 18:47:59 2022 +0100

    qemu: segmentation fault in virtqemud executing qemuDomainUndefineFlags
    
    Commit 5adfb3472342741c443ac91dee0abb18b5a3d038 causes a segmentation fault.
    
    Stack trace of thread 664419:
     #0  0x000003ff62ec553c in qemuDomainUndefineFlags (dom=0x3ff6c002810, flags=<optimized out>) at ../src/qemu/qemu_driver.c:6618
     #1  0x000003ff876a7e5c in virDomainUndefineFlags (domain=domain@entry=0x3ff6c002810, flags=<optimized out>) at ../src/libvirt-domain.c:6519
     #2  0x000002aa2b64a808 in remoteDispatchDomainUndefineFlags (server=0x2aa2c3d7880, msg=0x2aa2c3d2770, args=<optimized out>, rerr=0x3ff8287b950, client=<optimized out>)
            at src/remote/remote_daemon_dispatch_stubs.h:13080
     #3  remoteDispatchDomainUndefineFlagsHelper (server=0x2aa2c3d7880, client=<optimized out>, msg=0x2aa2c3d2770, rerr=0x3ff8287b950, args=<optimized out>, ret=0x0)
            at src/remote/remote_daemon_dispatch_stubs.h:13059
     #4  0x000003ff8758bbf4 in virNetServerProgramDispatchCall (msg=0x2aa2c3d2770, client=0x2aa2c3e3050, server=0x2aa2c3d7880, prog=0x2aa2c3d8010)
            at ../src/rpc/virnetserverprogram.c:428
     #5  virNetServerProgramDispatch (prog=0x2aa2c3d8010, server=server@entry=0x2aa2c3d7880, client=0x2aa2c3e3050, msg=0x2aa2c3d2770) at ../src/rpc/virnetserverprogram.c:302
     #6  0x000003ff8758c260 in virNetServerProcessMsg (msg=<optimized out>, prog=<optimized out>, client=<optimized out>, srv=0x2aa2c3d7880) at ../src/rpc/virnetserver.c:140
     #7  virNetServerHandleJob (jobOpaque=0x2aa2c3e2d30, opaque=0x2aa2c3d7880) at ../src/rpc/virnetserver.c:160
     #8  0x000003ff874c49aa in virThreadPoolWorker (opaque=<optimized out>) at ../src/util/virthreadpool.c:164
     #9  0x000003ff874c3f62 in virThreadHelper (data=<optimized out>) at ../src/util/virthread.c:256
     #10 0x000003ff86c1cf8c in start_thread () from /lib64/libc.so.6
     #11 0x000003ff86c9650e in thread_start () from /lib64/libc.so.6
    
    Signed-off-by: Boris Fiuczynski <fiuczy@linux.ibm.com>
    Reviewed-by: Jim Fehlig <jfehlig@suse.com>
    Reviewed-by: Michal Privoznik <mprivozn@redhat.com>

Index: libvirt-8.0.0/src/qemu/qemu_driver.c
===================================================================
--- libvirt-8.0.0.orig/src/qemu/qemu_driver.c
+++ libvirt-8.0.0/src/qemu/qemu_driver.c
@@ -6607,7 +6607,7 @@ qemuDomainUndefineFlags(virDomainPtr dom
         }
     }
 
-    if (vm->def->os.loader->nvram) {
+    if (vm->def->os.loader && vm->def->os.loader->nvram) {
         nvram_path = g_strdup(vm->def->os.loader->nvram);
     } else if (vm->def->os.firmware == VIR_DOMAIN_OS_DEF_FIRMWARE_EFI) {
         qemuDomainNVRAMPathFormat(cfg, vm->def, &nvram_path);