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| author | jeff <jeff@FreeBSD.org> | 2005-03-17 12:00:05 +0000 |
|---|---|---|
| committer | jeff <jeff@FreeBSD.org> | 2005-03-17 12:00:05 +0000 |
| commit | 91796cd6d745c48b440f94ccb9e27bb868c18b33 (patch) | |
| tree | 23df99005fb8d74da8676a3f8559baaebdf02623 | |
| parent | 479ac055a18b3122ef3d329f1d761e84da4df9b7 (diff) | |
| download | FreeBSD-src-91796cd6d745c48b440f94ccb9e27bb868c18b33.zip FreeBSD-src-91796cd6d745c48b440f94ccb9e27bb868c18b33.tar.gz | |
- Lock the clearing of v_data so it is safe to inspect it with the
interlock.
Sponsored by: Isilon Systems, Inc.
| -rw-r--r-- | sys/fs/nullfs/null_vnops.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/sys/fs/nullfs/null_vnops.c b/sys/fs/nullfs/null_vnops.c index 3ab3a6f..fe4b740 100644 --- a/sys/fs/nullfs/null_vnops.c +++ b/sys/fs/nullfs/null_vnops.c @@ -627,12 +627,18 @@ null_reclaim(struct vop_reclaim_args *ap) struct vnode *lowervp = xp->null_lowervp; struct lock *vnlock; + /* + * Use the interlock to protect the clearing of v_data to + * prevent faults in null_lock(). + */ + VI_LOCK(vp); + vp->v_data = NULL; + VI_UNLOCK(vp); if (lowervp) { null_hashrem(xp); vrele(lowervp); } - vp->v_data = NULL; vp->v_object = NULL; vnlock = vp->v_vnlock; vp->v_vnlock = &vp->v_lock; |
