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commit: Add NULL check for overlay_bs 

I can't see how overlay_bs could become NULL with the current code, but
other code in this function already checks it and we can make Coverity
happy with this check, so let's add it.

Cc: qemu-stable@nongnu.org
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Kevin Wolf 2017-07-10 13:42:35 +02:00
parent 718d7f4f9c
commit b1e1fa0c3a
1 changed files with 3 additions and 1 deletions
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block/commit.c
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@ -90,7 +90,9 @@ static void commit_complete(BlockJob *job, void *opaque)
/* Make sure overlay_bs and top stay around until bdrv_set_backing_hd() */
bdrv_ref(top);
bdrv_ref(overlay_bs);
if (overlay_bs) {
bdrv_ref(overlay_bs);
}
/* Remove base node parent that still uses BLK_PERM_WRITE/RESIZE before
* the normal backing chain can be restored. */