** Description changed: SRU Justification: ================== [Impact] * PCI Functions with UIDs >128 are currently not accounted correctly in the s390x/pci (zPCI) code. * Furthermore, the code allows that more than CONFIG_PCI_NR_FUNCTIONS are created. * This can lead to issues with data structures which were only allocated for CONFIG_PCI_NR_FUNCTIONS. [Fix] - * - https://bugs.launchpad.net/ubuntu-z-systems/+bug/1874057/+attachment/5357850/+files/0001-s390 - -pci-Fix-zpci_alloc_domain-over-allocation-for-focal.patch + * https://launchpadlibrarian.net/478235080/0001-s390-pci-Fix- + zpci_alloc_domain-over-allocation.patch [Test Case] * Set the kernel parameter CONFIG_PCI_NR_FUNCTIONS to a specific (reasonablly low) number. * And check if more PCI functions can be created than specified by CONFIG_PCI_NR_FUNCTIONS (e.g. using a RoCE adapter) and watch for kernel message 'Adding PCI function ... failed' - - [Regression Potential] + [Regression Potential] * There is regression potential can be considered as low, since: * the zPCI cards are less wide spread than for example ccw adapters on s390x * the fix got already upstream accepted in 5.7, hence upstream reviewed, too * the modifications span just two files and both are s390x arch specific [Other Info] * the above patch-file is based on commit 969ae01bab2fe938b4c8324836038b5ac1c78fac ("s390/pci: Fix zpci_alloc_domain() over allocation"), but this backport was needed for getting this applied to focal master-next * and this patch got upstream accepted with kernel v5.7-rc1, hence on the long term it should be in 'gorilla' __________ PCI Functions with UIDs >128 are currently not accounted correctly in the s390x/pci code. Furthermore, the code allows that more than CONFIG_PCI_NR_FUNCTIONS are created. This can lead to issues with data structures which were only allocated for CONFIG_PCI_NR_FUNCTIONS. This has been fixed in the following upstream commit: 969ae01bab2fe938b4c8324836038b5ac1c78fac ("s390/pci: Fix zpci_alloc_domain() over allocation")
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1874057 Title: [UBUNTU 20.04] s390x/pci: do not allow to create more pci functions than configured via CONFIG_PCI_NR_FUNCTIONS To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-z-systems/+bug/1874057/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
