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NFSv4: Fix a credential refcount leak in nfs41_check_delegation_stateid 

It is unsafe to dereference delegation outside the rcu lock, and in
any case, the refcount is guaranteed held if cred is non-zero.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
This commit is contained in:
Trond Myklebust 2019-07-19 13:48:44 -04:00
parent e21a712a96
commit 8c39a39e28
1 changed files with 1 additions and 2 deletions
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3
fs/nfs/nfs4proc.c
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@ -2778,8 +2778,7 @@ static void nfs41_check_delegation_stateid(struct nfs4_state *state)
if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID)
nfs_finish_clear_delegation_stateid(state, &stateid); nfs_finish_clear_delegation_stateid(state, &stateid);
if (delegation->cred) put_cred(cred);
put_cred(cred);
} }
/** /**