]> git.proxmox.com Git - mirror_ubuntu-eoan-kernel.git/commit
scsi: lpfc: fix: Coverity: lpfc_cmpl_els_rsp(): Null pointer dereferences
authorJames Smart <jsmart2021@gmail.com>
Mon, 11 Nov 2019 23:03:57 +0000 (15:03 -0800)
committerKhalid Elmously <khalid.elmously@canonical.com>
Wed, 29 Jan 2020 05:05:10 +0000 (00:05 -0500)
commit1a1cea08bd0bfac16745e09136fb1f8e2a052331
treedd540fb514c918dba8c9e73789694dd8b64caf4f
parent5cb00ed295eb655632a728934962bccb05452acf
scsi: lpfc: fix: Coverity: lpfc_cmpl_els_rsp(): Null pointer dereferences

BugLink: https://bugs.launchpad.net/bugs/1860816
[ Upstream commit 6c6d59e0fe5b86cf273d6d744a6a9768c4ecc756 ]

Coverity reported the following:

*** CID 101747:  Null pointer dereferences  (FORWARD_NULL)
/drivers/scsi/lpfc/lpfc_els.c: 4439 in lpfc_cmpl_els_rsp()
4433      kfree(mp);
4434      }
4435      mempool_free(mbox, phba->mbox_mem_pool);
4436      }
4437     out:
4438      if (ndlp && NLP_CHK_NODE_ACT(ndlp)) {
vvv     CID 101747:  Null pointer dereferences  (FORWARD_NULL)
vvv     Dereferencing null pointer "shost".
4439      spin_lock_irq(shost->host_lock);
4440      ndlp->nlp_flag &= ~(NLP_ACC_REGLOGIN | NLP_RM_DFLT_RPI);
4441      spin_unlock_irq(shost->host_lock);
4442
4443      /* If the node is not being used by another discovery thread,
4444       * and we are sending a reject, we are done with it.

Fix by adding a check for non-null shost in line 4438.
The scenario when shost is set to null is when ndlp is null.
As such, the ndlp check present was sufficient. But better safe
than sorry so add the shost check.

Reported-by: coverity-bot <keescook+coverity-bot@chromium.org>
Addresses-Coverity-ID: 101747 ("Null pointer dereferences")
Fixes: 2e0fef85e098 ("[SCSI] lpfc: NPIV: split ports")
CC: James Bottomley <James.Bottomley@SteelEye.com>
CC: "Gustavo A. R. Silva" <gustavo@embeddedor.com>
CC: linux-next@vger.kernel.org
Link: https://lore.kernel.org/r/20191111230401.12958-3-jsmart2021@gmail.com
Reviewed-by: Ewan D. Milne <emilne@redhat.com>
Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Khalid Elmously <khalid.elmously@canonical.com>
drivers/scsi/lpfc/lpfc_els.c