From: "J. Bruce Fields" <bfields@xxxxxxxxxx>
3.12-stable review patch. If anyone has any objections, please let me know.
===============
commit 27b11428b7de097c42f205beabb1764f4365443b upstream.
The current code assumes a one-to-one lockowner<->lock stateid
correspondance.
Signed-off-by: J. Bruce Fields <bfields@xxxxxxxxxx>
Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
---
fs/nfsd/nfs4state.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index b21ed5e5b369..6f1250c14606 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -4142,6 +4142,10 @@ static bool same_lockowner_ino(struct nfs4_lockowner *lo, struct inode *inode, c
if (!same_owner_str(&lo->lo_owner, owner, clid))
return false;
+ if (list_empty(&lo->lo_owner.so_stateids)) {
+ WARN_ON_ONCE(1);
+ return false;
+ }
lst = list_first_entry(&lo->lo_owner.so_stateids,
struct nfs4_ol_stateid, st_perstateowner);
return lst->st_file->fi_inode == inode;
--
1.9.3
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