This is a note to let you know that I've just added the patch titled btrfs: make search_csum_tree return 0 if we get -EFBIG 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-make-search_csum_tree-return-0-if-we-get-efbig.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 57a9aa844e01d9e5ff247d92e2d96c0e81824dfd Author: Josef Bacik <josef@xxxxxxxxxxxxxx> Date: Fri Feb 18 10:03:22 2022 -0500 btrfs: make search_csum_tree return 0 if we get -EFBIG [ Upstream commit 03ddb19d2ea745228879b9334f3b550c88acb10a ] We can either fail to find a csum entry at all and return -ENOENT, or we can find a range that is close, but return -EFBIG. In essence these both mean the same thing when we are doing a lookup for a csum in an existing range, we didn't find a csum. We want to treat both of these errors the same way, complain loudly that there wasn't a csum. This currently happens anyway because we do count = search_csum_tree(); if (count <= 0) { // reloc and error handling } However it forces us to incorrectly treat EIO or ENOMEM errors as on disk corruption. Fix this by returning 0 if we get either -ENOENT or -EFBIG from btrfs_lookup_csum() so we can do proper error handling. Reviewed-by: Boris Burkov <boris@xxxxxx> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@xxxxxxx> Signed-off-by: Josef Bacik <josef@xxxxxxxxxxxxxx> 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/file-item.c b/fs/btrfs/file-item.c index 0b9401a5afd3..161a69d7e117 100644 --- a/fs/btrfs/file-item.c +++ b/fs/btrfs/file-item.c @@ -303,7 +303,7 @@ static int search_csum_tree(struct btrfs_fs_info *fs_info, read_extent_buffer(path->nodes[0], dst, (unsigned long)item, ret * csum_size); out: - if (ret == -ENOENT) + if (ret == -ENOENT || ret == -EFBIG) ret = 0; return ret; }