[v6,10/10] savevm: Fix load_snapshot error path crash

Commit Message

Nicholas Piggin Aug. 13, 2024, 5:06 a.m. UTC

An error path missed setting *errp, which can cause a NULL deref.

Reviewed-by: Alex Bennée <[e-mail]>
Signed-off-by: Nicholas Piggin <[e-mail]>
---
 migration/savevm.c | 1 +
 1 file changed, 1 insertion(+)

Patch

diff --git a/migration/savevm.c b/migration/savevm.c
index 85958d7b09..6bb404b9c8 100644
--- a/migration/savevm.c
+++ b/migration/savevm.c
@@ -3288,6 +3288,7 @@  bool load_snapshot(const char *name, const char *vmstate,
     /* Don't even try to load empty VM states */
     ret = bdrv_snapshot_find(bs_vm_state, &sn, name);
     if (ret < 0) {
+        error_setg(errp, "Snapshot can not be found");
         return false;
     } else if (sn.vm_state_size == 0) {
         error_setg(errp, "This is a disk-only snapshot. Revert to it "