K 10
svn:author
V 8
hselasky
K 8
svn:date
V 27
2016-03-24T09:22:58.867034Z
K 7
svn:log
V 649
MFC r292254:

Properly drain callouts in the IPFW subsystem to avoid use after free
panics when unloading the dummynet and IPFW modules:

- The callout drain function can sleep and should not be called having
a non-sleepable lock locked. Remove locks around "ipfw_dyn_uninit(0)".

- Add a new "dn_gone" variable to prevent asynchronous restart of
dummynet callouts when unloading the dummynet kernel module.

- Call "dn_reschedule()" locked so that "dn_gone" can be set and
checked atomically with regard to starting a new callout.

PR:			208171
Requested by:		Franco Fichtner (opnsense.org)
Differential Revision:	https://reviews.freebsd.org/D3855

END