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NFSv4: Fix a credential refcount leak in nfs41_check_delegation_stateid

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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 <[email protected]>
This commit is contained in:
Trond Myklebust committed 2019-08-04 22:35:40 -04:00
1 parent e21a712a96
commit 8c39a39e28
1 file changed
+1 -2
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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)
nfs_finish_clear_delegation_stateid(state, &stateid);
if (delegation->cred)
put_cred(cred);
put_cred(cred);
}
/**