Date: Sat, 6 Aug 2005 01:42:04 +0000 (UTC) From: Suleiman Souhlal <ssouhlal@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/kern vfs_subr.c src/sys/sys mount.h vnode.h Message-ID: <200508060142.j761g4WL038761@repoman.freebsd.org>
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ssouhlal 2005-08-06 01:42:04 UTC
FreeBSD src repository
Modified files:
sys/kern vfs_subr.c
sys/sys mount.h vnode.h
Log:
Holding a vnode doesn't prevent v_mount from disappearing (when the
vnode is inactivated), possibly leading to a NULL dereference when
checking if the mount wants knotes to be activated in the VOP hooks.
So, we add a new vnode flag VV_NOKNOTE that is only set in getnewvnode(),
if necessary, and check it when activating knotes.
Since the flags are not erased when a vnode is being held, we can safely
read them.
Reviewed by: kris@
MFC after: 3 days
Revision Changes Path
1.638 +2 -0 src/sys/kern/vfs_subr.c
1.198 +2 -4 src/sys/sys/mount.h
1.306 +1 -0 src/sys/sys/vnode.h
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