kib de90d5191c Do not return out of bound pointers from intr_lookup_source().
This hardens the code against driver and upper level bugs causing
invalid indexes used, e.g. on msi release.

Reported by:	gallatin
Reviewed by:	gallatin, hselasky
Sponsored by:	Mellanox Technologies
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D14470
2018-02-23 11:20:59 +00:00
..
2018-02-22 03:37:01 +00:00
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