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btrfs: fix bitmap leak when loading free space cache on duplicate entry

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[ Upstream commit 320d8dc612660da84c3b70a28658bb38069e5a9a ]

If we failed to link a free space entry because there's already a
conflicting entry for the same offset, we free the free space entry but
we don't free the associated bitmap that we had just allocated before.
Fix that by freeing the bitmap before freeing the entry.

Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
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: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Filipe Manana 2024-07-03 15:40:59 +01:00 • committed by Greg Kroah-Hartman
parent 4dd406a308
commit a8ca88d3d9
1 changed files with 1 additions and 0 deletions
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fs/btrfs/free-space-cache.c
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@ -788,6 +788,7 @@ static int __load_free_space_cache(struct btrfs_root *root, struct inode *inode,
spin_unlock(&ctl->tree_lock);
btrfs_err(fs_info,
"Duplicate entries in free space cache, dumping");
kmem_cache_free(btrfs_free_space_bitmap_cachep, e->bitmap);
kmem_cache_free(btrfs_free_space_cachep, e);
goto free_cache;
}