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| author | Filipe Manana <fdmanana@suse.com> | 2018-03-26 23:59:12 +0100 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2018-03-31 02:01:05 +0200 |
| commit | 8434ec46c6e3232cebc25a910363b29f5c617820 (patch) | |
| tree | ef8cc9bf2cc3964cbb10f39993aeb26c1582b7ff /fs | |
| parent | 4ee3fad34a9cc2cf33303dfbd0cf554248651c86 (diff) | |
| download | linux-0-day-8434ec46c6e3232cebc25a910363b29f5c617820.tar.gz linux-0-day-8434ec46c6e3232cebc25a910363b29f5c617820.tar.xz | |
Btrfs: fix copy_items() return value when logging an inode
When logging an inode, at tree-log.c:copy_items(), if we call
btrfs_next_leaf() at the loop which checks for the need to log holes, we
need to make sure copy_items() returns the value 1 to its caller and
not 0 (on success). This is because the path the caller passed was
released and is now different from what is was before, and the caller
expects a return value of 0 to mean both success and that the path
has not changed, while a return value of 1 means both success and
signals the caller that it can not reuse the path, it has to perform
another tree search.
Even though this is a case that should not be triggered on normal
circumstances or very rare at least, its consequences can be very
unpredictable (especially when replaying a log tree).
Fixes: 16e7549f045d ("Btrfs: incompatible format change to remove hole extents")
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/btrfs/tree-log.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c index 552582a028a40..70afd10850336 100644 --- a/fs/btrfs/tree-log.c +++ b/fs/btrfs/tree-log.c @@ -3968,6 +3968,7 @@ fill_holes: ASSERT(ret == 0); src = src_path->nodes[0]; i = 0; + need_find_last_extent = true; } btrfs_item_key_to_cpu(src, &key, i); |