K 10
svn:author
V 4
zlei
K 8
svn:date
V 27
2023-04-10T05:10:39.189192Z
K 7
svn:log
V 986
infiniband: Widen NET_EPOCH coverage

From static code analysis, some device drivers (cxgbe, mlx4, mthca, and qlnx)
do not enter net epoch before lagg_input_infiniband(). If IPoIB interface is a
member of lagg(4) interface, and after returning from lagg_input_infiniband()
the receiving interface of mbuf is set to lagg(4) interface, then when
concurrently destroying the lagg(4) interface, there is a small window that the
interface gets destroyed and becomes invalid before infiniband_input() re-enter
net epoch, thus leading use-after-free.

Widen NET_EPOCH coverage to prevent use-after-free.

Thanks hselasky@ for testing with mlx5 devices.

Reviewed by:	hselasky
Tested by:	hselasky
MFC after:	1 week
Differential Revision:	https://reviews.freebsd.org/D39275

(cherry picked from commit 90820ef121b38479f2479c03c12c69f940f5fa33)
(cherry picked from commit 5d45e09d50e648a75667c9b12b204eb62fa60ed2)

Git Hash:   24069f0dc0730248bd5b09e50b12e37645d57c31
Git Author: zlei@FreeBSD.org
END