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vmci: fix panic due to freeing unallocated resources
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Authored by mp on Sep 18 2021, 8:29 PM.
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Details

Summary

An error mapping PCI resources results in a panic due to unallocated
resources being freed up. This change puts the appropriate checks in
place to prevent the panic.

PR: 252445
Reported by: Marek Zarychta <zarychtam@plan-b.pwste.edu.pl>
Tested by: marcus
MFC after: 1 week
Sponsored by: VMware

Test Plan

Along with user testing, also simulated error by inserting a ENXIO
return in vmci_map_bars().

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Repository
rG FreeBSD src repository
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