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xprtrdma: Don't leak freed MRs

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Defensive clean up. Don't set frwr->fr_mr until we know that the
scatterlist allocation has succeeded.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
Chuck Lever 2018-12-19 11:00:48 -05:00 committed by Anna Schumaker
parent af65ed404c
commit f85adb1bf5
1 changed files with 15 additions and 12 deletions
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27
net/sunrpc/xprtrdma/frwr_ops.c
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@ -155,36 +155,39 @@ frwr_mr_recycle_worker(struct work_struct *work)
int frwr_init_mr(struct rpcrdma_ia *ia, struct rpcrdma_mr *mr)
{
unsigned int depth = ia->ri_max_frwr_depth;
struct rpcrdma_frwr *frwr = &mr->frwr;
struct scatterlist *sg;
struct ib_mr *frmr;
int rc;
frwr->fr_mr = ib_alloc_mr(ia->ri_pd, ia->ri_mrtype, depth);
if (IS_ERR(frwr->fr_mr))
frmr = ib_alloc_mr(ia->ri_pd, ia->ri_mrtype, depth);
if (IS_ERR(frmr))
goto out_mr_err;
mr->mr_sg = kcalloc(depth, sizeof(*mr->mr_sg), GFP_KERNEL);
if (!mr->mr_sg)
sg = kcalloc(depth, sizeof(*sg), GFP_KERNEL);
if (!sg)
goto out_list_err;
frwr->fr_state = FRWR_IS_INVALID;
mr->frwr.fr_mr = frmr;
mr->frwr.fr_state = FRWR_IS_INVALID;
mr->mr_dir = DMA_NONE;
INIT_LIST_HEAD(&mr->mr_list);
INIT_WORK(&mr->mr_recycle, frwr_mr_recycle_worker);
sg_init_table(mr->mr_sg, depth);
init_completion(&frwr->fr_linv_done);
init_completion(&mr->frwr.fr_linv_done);
sg_init_table(sg, depth);
mr->mr_sg = sg;
return 0;
out_mr_err:
rc = PTR_ERR(frwr->fr_mr);
rc = PTR_ERR(frmr);
trace_xprtrdma_frwr_alloc(mr, rc);
return rc;
out_list_err:
rc = -ENOMEM;
dprintk("RPC: %s: sg allocation failure\n",
__func__);
ib_dereg_mr(frwr->fr_mr);
return rc;
ib_dereg_mr(frmr);
return -ENOMEM;
}
/**