From: "J. Bruce Fields" <[email protected]> This patch has been added to the 3.18 stable tree. If you have any objections, please let us know.
=============== [ Upstream commit 340f0ba1c6c8412aa35fd6476044836b84361ea6 ] alloc_init_lock_stateowner can return an already freed entry if there is a race to put openowners in the hashtable. Noticed by inspection after Jeff Layton fixed the same bug for open owners. Depending on client behavior, this one may be trickier to trigger in practice. Fixes: c58c6610ec24 "nfsd: Protect adding/removing lock owners using client_lock" Cc: <[email protected]> Cc: Trond Myklebust <[email protected]> Acked-by: Jeff Layton <[email protected]> Signed-off-by: J. Bruce Fields <[email protected]> Signed-off-by: Sasha Levin <[email protected]> --- fs/nfsd/nfs4state.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 4296acd..4460d45 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -5058,7 +5058,7 @@ alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, } else nfs4_free_lockowner(&lo->lo_owner); spin_unlock(&clp->cl_lock); - return lo; + return ret; } static void -- 2.1.0 -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
