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Filipe Manana de3ea5be51 btrfs: fix extent buffer leak on failure to copy root 
commit 72c9925f87c8b74f36f8e75a4cd93d964538d3ca upstream.

At btrfs_copy_root(), if the call to btrfs_inc_ref() fails we end up
returning without unlocking and releasing our reference on the extent
buffer named "cow" we previously allocated with btrfs_alloc_tree_block().

So fix that by unlocking the extent buffer and dropping our reference on
it before returning.

Fixes: be20aa9dbadc8c ("Btrfs: Add mount option to turn off data cow")
CC: stable@vger.kernel.org # 4.4+
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-03-04 11:38:30 +01:00
..
tests
btrfs: fix missing delalloc new bit for new delalloc ranges
2020-11-13 22:15:59 +01:00
acl.c
btrfs: cleanup btrfs_setxattr_trans and drop transaction parameter
2019-04-29 19:02:44 +02:00
async-thread.c
Btrfs: fix crash during unmount due to race with delayed inode workers
2020-03-23 17:01:51 +01:00
async-thread.h
Btrfs: fix crash during unmount due to race with delayed inode workers
2020-03-23 17:01:51 +01:00
backref.c
btrfs: do not warn if we can't find the reloc root when looking up backref
2021-03-04 11:38:29 +01:00
backref.h
btrfs: add asserts for deleting backref cache nodes
2021-03-04 11:38:29 +01:00
block-group.c
btrfs: handle space_info::total_bytes_pinned inside the delayed ref itself
2021-03-04 11:38:30 +01:00
block-group.h
btrfs: convert block group refcount to refcount_t
2020-07-27 12:55:42 +02:00
block-rsv.c
btrfs: print the block rsv type when we fail our reservation
2020-11-05 13:02:05 +01:00
block-rsv.h
btrfs: Remove __ prefix from btrfs_block_rsv_release
2020-03-23 17:01:55 +01:00
btrfs_inode.h
btrfs: fix deadlock when cloning inline extent and low on free metadata space
2021-01-17 14:16:54 +01:00
check-integrity.c
btrfs: check-integrity: remove unnecessary failure messages during memory allocation
2020-07-27 12:55:21 +02:00
check-integrity.h
btrfs: remove btrfsic_submit_bh()
2020-03-23 17:01:39 +01:00
compression.c
btrfs: compression: move declarations to header
2020-10-07 12:06:55 +02:00
compression.h
btrfs: compression: move declarations to header
2020-10-07 12:06:55 +02:00
ctree.c
btrfs: fix extent buffer leak on failure to copy root
2021-03-04 11:38:30 +01:00
ctree.h
btrfs: fix backport of 2175bf57dc952 in 5.10.13
2021-02-23 15:53:25 +01:00
delalloc-space.c
btrfs: add btrfs_reserve_data_bytes and use it
2020-10-07 12:06:52 +02:00
delalloc-space.h
btrfs: make btrfs_delalloc_reserve_space take btrfs_inode
2020-07-27 12:55:36 +02:00
delayed-inode.c
btrfs: sink total_data parameter in setup_items_for_insert
2020-10-07 12:13:18 +02:00
delayed-inode.h
btrfs: delayed-inode: Replace zero-length array with flexible-array member
2020-03-23 17:01:53 +01:00
delayed-ref.c
btrfs: account for new extents being deleted in total_bytes_pinned
2021-03-04 11:38:30 +01:00
delayed-ref.h
btrfs: handle space_info::total_bytes_pinned inside the delayed ref itself
2021-03-04 11:38:30 +01:00
dev-replace.c
btrfs: fix deadlock when cloning inline extent and low on free metadata space
2021-01-17 14:16:54 +01:00
dev-replace.h
btrfs: add __pure attribute to functions
2019-11-18 12:46:52 +01:00
dir-item.c
btrfs: remove unused parameter fs_info from btrfs_extend_item
2019-04-29 19:02:50 +02:00
discard.c
btrfs: merge critical sections of discard lock in workfn
2021-01-19 18:27:24 +01:00
discard.h
btrfs: discard: Use the correct style for SPDX License Identifier
2020-04-20 17:43:42 +02:00
disk-io.c
btrfs: print the actual offset in btrfs_root_name
2021-01-27 11:55:06 +01:00
disk-io.h
btrfs: add a helper to read the tree_root commit root for backref lookup
2020-10-26 15:04:57 +01:00
export.c
btrfs: simplify iget helpers
2020-05-25 11:25:37 +02:00
export.h
btrfs: export helpers for subvolume name/id resolution
2020-03-23 17:01:42 +01:00
extent_io.c
btrfs: prevent NULL pointer dereference in extent_io_tree_panic
2021-01-19 18:27:17 +01:00
extent_io.h
btrfs: remove struct extent_io_ops
2020-10-07 12:13:25 +02:00
extent_map.c
Btrfs: fix race between using extent maps and merging them
2020-02-12 17:16:46 +01:00
extent_map.h
btrfs: remove extent_map::bdev
2019-11-18 23:43:44 +01:00
extent-io-tree.h
btrfs: remove struct extent_io_ops
2020-10-07 12:13:25 +02:00
extent-tree.c
btrfs: account for new extents being deleted in total_bytes_pinned
2021-03-04 11:38:30 +01:00
file-item.c
btrfs: make btrfs_find_ordered_sum take btrfs_inode
2020-10-07 12:12:19 +02:00
file.c
btrfs: fix missing delalloc new bit for new delalloc ranges
2020-11-13 22:15:59 +01:00
free-space-cache.c
btrfs: clarify error returns values in __load_free_space_cache
2021-03-04 11:37:47 +01:00
free-space-cache.h
btrfs: let btrfs_return_cluster_to_free_space() return void
2020-07-27 12:55:21 +02:00
free-space-tree.c
btrfs: fix possible free space tree corruption with online conversion
2021-02-03 23:28:40 +01:00
free-space-tree.h
btrfs: rename btrfs_block_group_cache
2019-11-18 17:51:51 +01:00
inode-item.c
btrfs: Make btrfs_find_name_in_ext_backref return struct btrfs_inode_extref
2019-09-09 14:59:16 +02:00
inode-map.c
btrfs: make btrfs_delalloc_reserve_space take btrfs_inode
2020-07-27 12:55:36 +02:00
inode-map.h
…
inode.c
btrfs: fix double accounting of ordered extent for subpage case in btrfs_invalidapge
2021-03-04 11:37:48 +01:00
ioctl.c
btrfs: fix deadlock when cloning inline extent and low on free metadata space
2021-01-17 14:16:54 +01:00
Kconfig
btrfs: switch to iomap for direct IO
2020-10-07 12:06:57 +02:00
locking.c
btrfs: add nesting tags to the locking helpers
2020-10-07 12:12:16 +02:00
locking.h
btrfs: introduce BTRFS_NESTING_NEW_ROOT for adding new roots
2020-10-07 12:12:17 +02:00
lzo.c
btrfs: compression: inline free_workspace
2019-11-18 12:46:59 +01:00
Makefile
Btrfs: move all reflink implementation code into its own file
2020-03-23 17:01:54 +01:00
misc.h
btrfs: rename tree_entry to rb_simple_node and export it
2020-05-25 11:25:19 +02:00
ordered-data.c
btrfs: remove inode argument from btrfs_start_ordered_extent
2020-10-07 12:13:22 +02:00
ordered-data.h
btrfs: remove inode argument from btrfs_start_ordered_extent
2020-10-07 12:13:22 +02:00
orphan.c
…
print-tree.c
btrfs: print the actual offset in btrfs_root_name
2021-01-27 11:55:06 +01:00
print-tree.h
btrfs: print the actual offset in btrfs_root_name
2021-01-27 11:55:06 +01:00
props.c
btrfs: simplify iget helpers
2020-05-25 11:25:37 +02:00
props.h
btrfs: delete unused function btrfs_set_prop_trans
2019-04-29 19:02:54 +02:00
qgroup.c
btrfs: fix transaction leak and crash after RO remount caused by qgroup rescan
2021-01-19 18:27:24 +01:00
qgroup.h
btrfs: qgroup: export qgroups in sysfs
2020-07-27 12:55:37 +02:00
raid56.c
btrfs: raid56: remove out label in __raid56_parity_recover
2020-07-27 12:55:44 +02:00
raid56.h
btrfs: constify map parameter for nr_parity_stripes and nr_data_stripes
2019-07-01 13:34:58 +02:00
rcu-string.h
btrfs: rcu-string: Replace zero-length array with flexible-array member
2020-03-23 17:01:53 +01:00
reada.c
btrfs: fix readahead hang and use-after-free after removing a device
2020-10-26 15:03:59 +01:00
ref-verify.c
btrfs: ref-verify: fix memory leak in btrfs_ref_tree_mod
2020-11-05 13:03:39 +01:00
ref-verify.h
btrfs: ref-verify: Use btrfs_ref to refactor btrfs_ref_tree_mod()
2019-04-29 19:02:49 +02:00
reflink.c
btrfs: fix deadlock when cloning inline extent and low on free metadata space
2021-01-17 14:16:54 +01:00
reflink.h
Btrfs: move all reflink implementation code into its own file
2020-03-23 17:01:54 +01:00
relocation.c
btrfs: fix reloc root leak with 0 ref reloc roots on recovery
2021-03-04 11:38:30 +01:00
root-tree.c
btrfs: qgroup: fix qgroup meta rsv leak for subvolume operations
2020-10-07 12:12:13 +02:00
scrub.c
btrfs: scrub: update message regarding read-only status
2020-11-05 13:02:58 +01:00
send.c
btrfs: send: fix invalid clone operations when cloning from the same file and root
2021-01-27 11:54:53 +01:00
send.h
btrfs: send: avoid copying file data
2020-10-07 12:13:17 +02:00
space-info.c
btrfs: shrink delalloc pages instead of full inodes
2021-01-17 14:16:54 +01:00
space-info.h
btrfs: handle space_info::total_bytes_pinned inside the delayed ref itself
2021-03-04 11:38:30 +01:00
struct-funcs.c
btrfs: use unaligned helpers for stack and header set/get helpers
2020-10-07 12:13:23 +02:00
super.c
btrfs: fix transaction leak and crash after RO remount caused by qgroup rescan
2021-01-19 18:27:24 +01:00
sysfs.c
btrfs: do not create raid sysfs entries under any locks
2020-10-07 12:13:19 +02:00
sysfs.h
btrfs: split and refactor btrfs_sysfs_remove_devices_dir
2020-10-07 12:12:21 +02:00
transaction.c
btrfs: update last_byte_to_unpin in switch_commit_roots
2020-12-30 11:54:13 +01:00
transaction.h
btrfs: dio iomap DSYNC workaround
2020-10-07 12:06:57 +02:00
tree-checker.c
btrfs: tree-checker: check if chunk item end overflows
2021-01-19 18:27:22 +01:00
tree-checker.h
btrfs: get fs_info from eb in btrfs_check_chunk_valid
2019-04-29 19:02:39 +02:00
tree-defrag.c
btrfs: remove unused btrfs_root::defrag_trans_start
2020-07-27 12:55:28 +02:00
tree-log.c
btrfs: skip unnecessary searches for xattrs when logging an inode
2021-01-17 14:16:53 +01:00
tree-log.h
btrfs: make fast fsyncs wait only for writeback
2020-10-07 12:06:56 +02:00
ulist.c
…
ulist.h
…
uuid-tree.c
btrfs: simplify root lookup by id
2020-05-25 11:25:36 +02:00
volumes.c
btrfs: fix lockdep warning due to seqcount_mutex on 32bit arch
2021-02-03 23:28:40 +01:00
volumes.h
btrfs: fix lockdep warning due to seqcount_mutex on 32bit arch
2021-02-03 23:28:40 +01:00
xattr.c
btrfs: skip unnecessary searches for xattrs when logging an inode
2021-01-17 14:16:53 +01:00
xattr.h
btrfs: cleanup btrfs_setxattr_trans and drop transaction parameter
2019-04-29 19:02:44 +02:00
zlib.c
btrfs: use larger zlib buffer for s390 hardware compression
2020-01-31 10:30:40 -08:00
zstd.c
btrfs: compression: inline free_workspace
2019-11-18 12:46:59 +01:00