[PATCH] scsi: cxgb4i: Fix potential NULL pointer dereference

From: Aditya Pakki
Date: Tue Mar 12 2019 - 12:48:15 EST


alloc_wr may fail and return NULL. The patch checks for such a
scenario and avoids it.

Signed-off-by: Aditya Pakki <pakki001@xxxxxxx>
---
drivers/scsi/cxgbi/cxgb4i/cxgb4i.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c b/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c
index d44914e5e415..b4f1e00b9250 100644
--- a/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c
+++ b/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c
@@ -617,6 +617,8 @@ static inline int send_tx_flowc_wr(struct cxgbi_sock *csk)
#endif
flowclen16 = tx_flowc_wr_credits(&nparams, &flowclen);
skb = alloc_wr(flowclen, 0, GFP_ATOMIC);
+ if (!skb)
+ return -ENOMEM;
flowc = (struct fw_flowc_wr *)skb->head;
flowc->op_to_nparams =
htonl(FW_WR_OP_V(FW_FLOWC_WR) | FW_FLOWC_WR_NPARAMS_V(nparams));
--
2.17.1