On Wed, Aug 26, 2015 at 10:03:36PM +0800, Zhao Lei wrote: > We can trigger the bug by following operation: > (no wait between commands 3~5) > btrfs subvolume create /mnt/btrfs/mysubvol > btrfs subvolume snapshot /mnt/btrfs/mysubvol /mnt/btrfs/mysubvol_snap > btrfs subvolume delete /mnt/btrfs/mysubvol_snap > btrfs subvolume delete /mnt/btrfs/mysubvol > btrfs subvolume sync /mnt/btrfs > The last command will not exit. > > Reason: > List of "deleted subvolumes" are not currectly set. > > It caused by a typo of value assign, in detail: > *ids[idx] = sh->offset; > should be: > (*ids)[idx] = sh->offset; > So only first element is set to right memory address. > > If there are multiple "deleted subvolumes", program will > keep wait. > > Above typo also caused some segment fault in my test. > > This patch fixed above bug. > > Signed-off-by: Zhao Lei <zhao...@cn.fujitsu.com>
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