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nvme-fc: avoid null pointer dereference

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Before using dynamically allcoated variable lsop in the
nvme_fc_rcv_ls_req(), add a check for NULL and error out early.

Signed-off-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Chaitanya Kulkarni
2022-11-30 13:33:40 -08:00
committed by Christoph Hellwig
parent ea43fceea4
commit 6c90294d72
1 changed files with 10 additions and 1 deletions
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drivers/nvme/host/fc.c
+10 -1
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@@ -1754,9 +1754,18 @@ nvme_fc_rcv_ls_req(struct nvme_fc_remote_port *portptr,
}
lsop = kzalloc(sizeof(*lsop), GFP_KERNEL);
if (!lsop) {
dev_info(lport->dev,
"RCV %s LS failed: No memory\n",
(w0->ls_cmd <= NVME_FC_LAST_LS_CMD_VALUE) ?
nvmefc_ls_names[w0->ls_cmd] : "");
ret = -ENOMEM;
goto out_put;
}
lsop->rqstbuf = kzalloc(sizeof(*lsop->rqstbuf), GFP_KERNEL);
lsop->rspbuf = kzalloc(sizeof(*lsop->rspbuf), GFP_KERNEL);
if (!lsop || !lsop->rqstbuf || !lsop->rspbuf) {
if (!lsop->rqstbuf || !lsop->rspbuf) {
dev_info(lport->dev,
"RCV %s LS failed: No memory\n",
(w0->ls_cmd <= NVME_FC_LAST_LS_CMD_VALUE) ?