[PATCH 5.15 002/620] afs: Fix directory format encoding struct

[Greg Kroah-Hartman]

5.15-stable review patch.  If anyone has any objections, please let me know.

------------------

From: David Howells <dhowells at redhat.com>

[ Upstream commit 07a10767853adcbdbf436dc91393b729b52c4e81 ]

The AFS directory format structure, union afs_xdr_dir_block::meta, has too
many alloc counter slots declared and so pushes the hash table along and
over the data.  This doesn't cause a problem at the moment because I'm
currently ignoring the hash table and only using the correct number of
alloc_ctrs in the code anyway.  In future, however, I should start using
the hash table to try and speed up afs_lookup().

Fix this by using the correct constant to declare the counter array.

Fixes: 4ea219a839bf ("afs: Split the directory content defs into a header")
Signed-off-by: David Howells <dhowells at redhat.com>
Link: https://lore.kernel.org/r/20241216204124.3752367-14-dhowells@redhat.com
cc: Marc Dionne <marc.dionne at auristor.com>
cc: linux-afs at lists.infradead.org
Signed-off-by: Christian Brauner <brauner at kernel.org>
Signed-off-by: Sasha Levin <sashal at kernel.org>
---
 fs/afs/xdr_fs.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/afs/xdr_fs.h b/fs/afs/xdr_fs.h
index 8ca8681645077..cc5f143d21a34 100644
--- a/fs/afs/xdr_fs.h
+++ b/fs/afs/xdr_fs.h
@@ -88,7 +88,7 @@ union afs_xdr_dir_block {
 
 	struct {
 		struct afs_xdr_dir_hdr	hdr;
-		u8			alloc_ctrs[AFS_DIR_MAX_BLOCKS];
+		u8			alloc_ctrs[AFS_DIR_BLOCKS_WITH_CTR];
 		__be16			hashtable[AFS_DIR_HASHTBL_SIZE];
 	} meta;
 
-- 
2.39.5