K 10
svn:author
V 3
kib
K 8
svn:date
V 27
2016-01-22T20:35:20.803873Z
K 7
svn:log
V 485
The struct file f_advice member is overlaid with the devfs f_cdevpriv
data.  If vnode bypass for devfs file failed, vn_read/vn_write are
called and might try to dereference f_advice.  Limit the accesses to
f_advice to VREG vnodes only, which is the type ensured by
posix_fadvise().

The f_advice for regular files is protected by mtxpool lock.  Recheck
that f_advice is not NULL after lock is taken.

Reported and tested by:	bde
Sponsored by:	The FreeBSD Foundation
MFC after:	3 weeks

END