Okay, that backport applies flawlessly - thanks!
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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
Status in Ubuntu on IBM z Systems:
New
Status in linux package in Ubuntu:
New
Bug description:
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")
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