[PATCH 47/60] staging: lustre: mdc: avoid returning freed request

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From: "John L. Hammond" <john.hammond@xxxxxxxxx>

In mdc_close() if ptlrpc_request_pack() fails then set req to NULL so
that an already freed request is not returned in *request.

Signed-off-by: John L. Hammond <john.hammond@xxxxxxxxx>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-8811
Reviewed-on: https://review.whamcloud.com/23843
Reviewed-by: Patrick Farrell <paf@xxxxxxxx>
Reviewed-by: Andreas Dilger <andreas.dilger@xxxxxxxxx>
Signed-off-by: James Simmons <jsimmons@xxxxxxxxxxxxx>
---
 drivers/staging/lustre/lustre/mdc/mdc_request.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/staging/lustre/lustre/mdc/mdc_request.c b/drivers/staging/lustre/lustre/mdc/mdc_request.c
index 02f57d8..a12035d 100644
--- a/drivers/staging/lustre/lustre/mdc/mdc_request.c
+++ b/drivers/staging/lustre/lustre/mdc/mdc_request.c
@@ -762,6 +762,7 @@ static int mdc_close(struct obd_export *exp, struct md_op_data *op_data,
 	rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_CLOSE);
 	if (rc) {
 		ptlrpc_request_free(req);
+		req = NULL;
 		goto out;
 	}
 
-- 
1.8.3.1

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