K 10
svn:author
V 5
markj
K 8
svn:date
V 27
2019-08-20T17:52:12.892636Z
K 7
svn:log
V 267
Use a sleepable lock for midistat functions.

Otherwise the mutex needs to be dropped when copying out the midistat
sbuf, leading to a race which allows one to read kernel memory beyond
the end of the sbuf buffer.

Reported and tested by:	pho
Security:	CVE-2019-5612

END