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authorkib <kib@FreeBSD.org>2013-04-28 19:19:26 +0000
committerkib <kib@FreeBSD.org>2013-04-28 19:19:26 +0000
commitdae393576885009863cdf2f416eba41391fa7712 (patch)
treee988fafd506fcb0a5d479fd7f688c47b04551ef3 /sys
parentebecd57ee2dd46812376994b4fb9cf9c81af71c5 (diff)
downloadFreeBSD-src-dae393576885009863cdf2f416eba41391fa7712.zip
FreeBSD-src-dae393576885009863cdf2f416eba41391fa7712.tar.gz
Assert that the object type for the vnode' non-NULL v_object, passed
to vnode_pager_setsize(), is either OBJT_VNODE, or, if vnode was already reclaimed, OBJT_DEAD. Note that the later is only possible due to some filesystems, in particular, nfsiods from nfs clients, call vnode_pager_setsize() with unlocked vnode. More, if the object is terminated, do not perform the resizing operation. Reviewed by: alc Tested by: pho, bf MFC after: 1 week
Diffstat (limited to 'sys')
-rw-r--r--sys/vm/vnode_pager.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/sys/vm/vnode_pager.c b/sys/vm/vnode_pager.c
index 296511e..fa92768 100644
--- a/sys/vm/vnode_pager.c
+++ b/sys/vm/vnode_pager.c
@@ -380,6 +380,12 @@ vnode_pager_setsize(vp, nsize)
return;
/* ASSERT_VOP_ELOCKED(vp, "vnode_pager_setsize and not locked vnode"); */
VM_OBJECT_WLOCK(object);
+ if (object->type == OBJT_DEAD) {
+ VM_OBJECT_WUNLOCK(object);
+ return;
+ }
+ KASSERT(object->type == OBJT_VNODE,
+ ("not vnode-backed object %p", object));
if (nsize == object->un_pager.vnp.vnp_size) {
/*
* Hasn't changed size
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