This is a note to let you know that I've just added the patch titled
btrfs: fix bitmap leak when loading free space cache on duplicate entry
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
btrfs-fix-bitmap-leak-when-loading-free-space-cache-.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit f9e9f9662ae4bfa60d88983ed31701a0a10cc27d
Author: Filipe Manana <fdmanana@xxxxxxxx>
Date: Wed Jul 3 15:40:59 2024 +0100
btrfs: fix bitmap leak when loading free space cache on duplicate entry
[ 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@xxxxxxx>
Signed-off-by: Filipe Manana <fdmanana@xxxxxxxx>
Reviewed-by: David Sterba <dsterba@xxxxxxxx>
Signed-off-by: David Sterba <dsterba@xxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
index 9161bc4f40649..0004488eeb060 100644
--- a/fs/btrfs/free-space-cache.c
+++ b/fs/btrfs/free-space-cache.c
@@ -829,6 +829,7 @@ 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;
}
