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nfsd4: warn on finding lockowner without stateid's

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commit 27b11428b7 upstream.

The current code assumes a one-to-one lockowner<->lock stateid
correspondance.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
J. Bruce Fields 2014-05-08 11:19:41 -04:00 committed by Greg Kroah-Hartman
parent 53a3b8bea5
commit 02016987ba
1 changed files with 4 additions and 0 deletions
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4
fs/nfsd/nfs4state.c
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@ -4045,6 +4045,10 @@ 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;