On 3/1/22 10:47, Boris Fiuczynski wrote:

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

libvirt-tck encountered the same segfault in my test environment.

Signed-off-by: Boris Fiuczynski <fiuczy@linux.ibm.com> --- src/qemu/qemu_driver.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

Reviewed-by: Jim Fehlig <jfehlig@suse.com> Regards, Jim

diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c index b74b0375a7..18f1156862 100644 --- a/src/qemu/qemu_driver.c +++ b/src/qemu/qemu_driver.c @@ -6615,7 +6615,7 @@ 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);