diff options
Diffstat (limited to 'block/mirror.c')
| -rw-r--r-- | block/mirror.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/block/mirror.c b/block/mirror.c index e86f8f8ad7..e778ee0ed0 100644 --- a/block/mirror.c +++ b/block/mirror.c @@ -514,7 +514,12 @@ static void mirror_exit(BlockJob *job, void *opaque) /* Remove target parent that still uses BLK_PERM_WRITE/RESIZE before * inserting target_bs at s->to_replace, where we might not be able to get - * these permissions. */ + * these permissions. + * + * Note that blk_unref() alone doesn't necessarily drop permissions because + * we might be running nested inside mirror_drain(), which takes an extra + * reference, so use an explicit blk_set_perm() first. */ + blk_set_perm(s->target, 0, BLK_PERM_ALL, &error_abort); blk_unref(s->target); s->target = NULL; |