scsi: lpfc: Fix ioremap issues in lpfc_sli4_pci_mem_setup()
3Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackepss 0.2%
exploitation probability
0.2%top 94% of all CVEs
observed exploitation
nono source reports it
In the Linux kernel, the following vulnerability has been resolved:
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.
Affected products
Linux · LinuxReferences
https://git.kernel.org/stable/c/631d0fab143bef85ea0813596f1dda36e2b9724chttps://git.kernel.org/stable/c/74d90f92eafe8ccd12827228236a28a94eda6bcchttps://git.kernel.org/stable/c/7e5a54d1f00725a739dcd20f616d82eff4f764bdhttps://git.kernel.org/stable/c/91a0c0c1413239d0548b5aac4c82f38f6d53a91ehttps://git.kernel.org/stable/c/bab8dc38b1a0a12bc064fc064269033bdcf5b88ehttps://git.kernel.org/stable/c/e6f1ef4a53856ed000b0f7265d7e16dcb00f4243https://git.kernel.org/stable/c/fd8c83d8375b9dac1949f2753485a5c055ebfad0