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btrfs: fix double iput() on inode after an error during orphan cleanup

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At btrfs_orphan_cleanup(), if we were able to find the inode, we do an
iput() on the inode, then if btrfs_drop_verity_items() succeeds and then
either btrfs_start_transaction() or btrfs_del_orphan_item() fail, we do
another iput() in the respective error paths, resulting in an extra iput()
on the inode.

Fix this by setting inode to NULL after the first iput(), as iput()
ignores a NULL inode pointer argument.

Fixes: a13bb2c038 ("btrfs: add missing iputs on orphan cleanup failure")
CC: stable@vger.kernel.org # 6.4
Reviewed-by: Boris Burkov <boris@bur.io>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Filipe Manana 2023-07-03 18:15:30 +01:00 committed by David Sterba
parent f1a07c2b4e
commit b777d279ff
1 changed files with 1 additions and 0 deletions
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fs/btrfs/inode.c
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@ -3728,6 +3728,7 @@ int btrfs_orphan_cleanup(struct btrfs_root *root)
if (!ret) {
ret = btrfs_drop_verity_items(BTRFS_I(inode));
iput(inode);
inode = NULL;
if (ret)
goto out;
}