[PATCH 12/16] dlm: fix dlm_dir_lookup() handling of too long names

[David Teigland]

From: Al Viro <viro@xxxxxxxxxxxxxxxxxx>

... those can happen and BUG() from DLM_ASSERT() in allocate_direntry() is
not a good way to handle them.

Signed-off-by: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Signed-off-by: David Teigland <teigland@xxxxxxxxxx>
---
 fs/dlm/dir.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/fs/dlm/dir.c b/fs/dlm/dir.c
index 831050e..85defeb 100644
--- a/fs/dlm/dir.c
+++ b/fs/dlm/dir.c
@@ -319,6 +319,9 @@ static int get_entry(struct dlm_ls *ls, int nodeid, char *name,
 
 	write_unlock(&ls->ls_dirtbl[bucket].lock);
 
+	if (namelen > DLM_RESNAME_MAXLEN)
+		return -EINVAL;
+
 	de = kzalloc(sizeof(struct dlm_direntry) + namelen, GFP_KERNEL);
 	if (!de)
 		return -ENOMEM;
-- 
1.5.3.3

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