Author: mjg
Date: Wed Jan 1 22:50:23 2020
New Revision: 356260
URL: https://svnweb.freebsd.org/changeset/base/356260
Log:
msdos: vgone unconstructed vnode before vputing it
Otherwise someone else may race to start using it. Race window
was opened by r351748 ("vfs: implement usecount implying holdcnt").
Noted by: kib
Modified:
head/sys/fs/msdosfs/msdosfs_denode.c
Modified: head/sys/fs/msdosfs/msdosfs_denode.c
==============================================================================
--- head/sys/fs/msdosfs/msdosfs_denode.c Wed Jan 1 22:47:00 2020
(r356259)
+++ head/sys/fs/msdosfs/msdosfs_denode.c Wed Jan 1 22:50:23 2020
(r356260)
@@ -230,7 +230,7 @@ deget(struct msdosfsmount *pmp, u_long dirclust, u_lon
* Arrange for vput() to just forget about it.
*/
ldep->de_Name[0] = SLOT_DELETED;
-
+ vgone(nvp);
vput(nvp);
*depp = NULL;
return (error);
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