From 2468eed3befde57ee5be090dd957b9cec220449e Mon Sep 17 00:00:00 2001 From: Alberto Garcia Date: Fri, 15 Feb 2019 15:49:32 +0200 Subject: [PATCH] commit: Replace commit_top_bs on failure after deleting the block job If there's an error in commit_start() then the block job must be deleted before replacing commit_top_bs, otherwise it will fail because of lack of permissions. This happens since the permission system was introduced in 8dfba2797761d8a43744e4e6571c8175e448a478. Fortunately this bug doesn't seem to be possible to reproduce at the moment without changing the code. Signed-off-by: Alberto Garcia Signed-off-by: Kevin Wolf --- block/commit.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/block/commit.c b/block/commit.c index 53148e610b..5deb05925b 100644 --- a/block/commit.c +++ b/block/commit.c @@ -374,10 +374,12 @@ fail: if (s->top) { blk_unref(s->top); } + job_early_fail(&s->common.job); + /* commit_top_bs has to be replaced after deleting the block job, + * otherwise this would fail because of lack of permissions. */ if (commit_top_bs) { bdrv_replace_node(commit_top_bs, top, &error_abort); } - job_early_fail(&s->common.job); }