[PATCH] nfsd: fix memory leak of async_copy

[Colin King]

From: Colin Ian King <colin.k...@canonical.com>

In the case where async_copy is successfully allocated but
the call to nfs4_init_cp_state fails, async_copy is not
currently freed and the memory is leaked. Fix this by kfree'ing
it before returning.

Detected by CoverityScan, CID#1471823 ("Resource leak")

Fixes: beb1814d5a8a ("NFSD create new stateid for async copy")
Signed-off-by: Colin Ian King <colin.k...@canonical.com>
---
 fs/nfsd/nfs4proc.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c
index 8f3368353aaf..3fb96a2708b9 100644
--- a/fs/nfsd/nfs4proc.c
+++ b/fs/nfsd/nfs4proc.c
@@ -1295,8 +1295,10 @@ nfsd4_copy(struct svc_rqst *rqstp, struct 
nfsd4_compound_state *cstate,
                async_copy = kzalloc(sizeof(struct nfsd4_copy), GFP_KERNEL);
                if (!async_copy)
                        goto out;
-               if (!nfs4_init_cp_state(nn, copy))
+               if (!nfs4_init_cp_state(nn, copy)) {
+                       kfree(async_copy);
                        goto out;
+               }
                refcount_set(&async_copy->refcount, 1);
                memcpy(&copy->cp_res.cb_stateid, &copy->cp_stateid,
                        sizeof(copy->cp_stateid));
-- 
2.17.1