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Re: kern/48135: Bad locking for umount
The following reply was made to PR kern/48135; it has been noted by GNATS.
From: "J. Hannken-Illjes" <hannken%eis.cs.tu-bs.de@localhost>
Subject: Re: kern/48135: Bad locking for umount
Date: Wed, 21 Aug 2013 11:13:54 +0200
This fix looks wrong.
If it is possible for the (last) reference to go away while vfs_busy() is
running it is also unsafe to increment the reference counter here as it
could be zero and be freed from vfs_destroy().
Do you have stack traces from the threads running vfs_busy()
J. Hannken-Illjes - hannken%eis.cs.tu-bs.de@localhost - TU Braunschweig
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