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| author | Shuchang Li <lishuchang@hust.edu.cn> | 2023-04-04 15:21:32 +0800 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2023-04-11 21:03:00 -0400 |
| commit | 91a0c0c1413239d0548b5aac4c82f38f6d53a91e (patch) | |
| tree | bd0cb7e508d533966101194348d71a291ff05ea3 /drivers/scsi | |
| parent | 85140baf096bdca07cd5ab2fdc507db9cd4ba4e7 (diff) | |
| download | lwn-91a0c0c1413239d0548b5aac4c82f38f6d53a91e.tar.gz lwn-91a0c0c1413239d0548b5aac4c82f38f6d53a91e.zip | |
scsi: lpfc: Fix ioremap issues in lpfc_sli4_pci_mem_setup()
When if_type equals zero and pci_resource_start(pdev, PCI_64BIT_BAR4)
returns false, drbl_regs_memmap_p is not remapped. This passes a NULL
pointer to iounmap(), which can trigger a WARN() on certain arches.
When if_type equals six and pci_resource_start(pdev, PCI_64BIT_BAR4)
returns true, drbl_regs_memmap_p may has been remapped and
ctrl_regs_memmap_p is not remapped. This is a resource leak and passes a
NULL pointer to iounmap().
To fix these issues, we need to add null checks before iounmap(), and
change some goto labels.
Fixes: 1351e69fc6db ("scsi: lpfc: Add push-to-adapter support to sli4")
Signed-off-by: Shuchang Li <lishuchang@hust.edu.cn>
Link: https://lore.kernel.org/r/20230404072133.1022-1-lishuchang@hust.edu.cn
Reviewed-by: Justin Tee <justin.tee@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi')
| -rw-r--r-- | drivers/scsi/lpfc/lpfc_init.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c index a9e36c73cfc5..3b0642dc023b 100644 --- a/drivers/scsi/lpfc/lpfc_init.c +++ b/drivers/scsi/lpfc/lpfc_init.c @@ -12024,7 +12024,7 @@ lpfc_sli4_pci_mem_setup(struct lpfc_hba *phba) goto out_iounmap_all; } else { error = -ENOMEM; - goto out_iounmap_all; + goto out_iounmap_ctrl; } } @@ -12042,7 +12042,7 @@ lpfc_sli4_pci_mem_setup(struct lpfc_hba *phba) dev_err(&pdev->dev, "ioremap failed for SLI4 HBA dpp registers.\n"); error = -ENOMEM; - goto out_iounmap_ctrl; + goto out_iounmap_all; } phba->pci_bar4_memmap_p = phba->sli4_hba.dpp_regs_memmap_p; } @@ -12067,9 +12067,11 @@ lpfc_sli4_pci_mem_setup(struct lpfc_hba *phba) return 0; out_iounmap_all: - iounmap(phba->sli4_hba.drbl_regs_memmap_p); + if (phba->sli4_hba.drbl_regs_memmap_p) + iounmap(phba->sli4_hba.drbl_regs_memmap_p); out_iounmap_ctrl: - iounmap(phba->sli4_hba.ctrl_regs_memmap_p); + if (phba->sli4_hba.ctrl_regs_memmap_p) + iounmap(phba->sli4_hba.ctrl_regs_memmap_p); out_iounmap_conf: iounmap(phba->sli4_hba.conf_regs_memmap_p); |