savevm without id or tag segfaults in:
(gdb) bt
#0 0x00007f600a83bf8a in __strcmp_sse42 () from /lib64/libc.so.6
#1 0x00000000004745b6 in bdrv_snapshot_find (bs=<value optimized out>,
sn_info=0x7fff996be280, name=0x0) at savevm.c:1631
#2 0x0000000000475c80 in del_existing_snapshots (name=<value optimized out>,
mon=<value optimized out>) at savevm.c:1654
#3 do_savevm (name=<value optimized out>, mon=<value optimized out>)
Signed-off-by: Marcelo Tosatti<address@hidden>
diff --git a/savevm.c b/savevm.c
index b3bb909..2fd3de6 100644
--- a/savevm.c
+++ b/savevm.c
@@ -1718,7 +1718,7 @@ void do_savevm(Monitor *mon, const QDict *qdict)
sn->vm_clock_nsec = qemu_get_clock(vm_clock);
/* Delete old snapshots of the same name */
- if (del_existing_snapshots(mon, name)< 0) {
+ if (name&& del_existing_snapshots(mon, name)< 0) {
goto the_end;
}