K 10
svn:author
V 2
kp
K 8
svn:date
V 27
2021-08-31T19:14:03.480201Z
K 7
svn:log
V 650
iflib: fix potential NULL dereference

iflib_softirq_alloc_generic() can be called with a NULL irq parameter
(as done by for example the bnxt and ixl drivers). If
iflib_irq_set_affinity() then returns an error we'd try to dereference
the NULL irq pointer.

Check irq, and pass '-1' (which taskqgroup_attach() expects) if we don't
have an irq.

Direct commit to stable/12, because this issue does not exist on main
and stable/13.

Reviewed by:    kbowling
Sponsored by:   Rubicon Communications, LLC ("Netgate")
Differential Revision:  https://reviews.freebsd.org/D31758

Git Hash:   bfa89a5dd1055447ee64e0a4cf77898ee970a3b1
Git Author: kp@FreeBSD.org
END