missing mnt_drop_write() on open error

From: Miklos Szeredi
Date: Tue Sep 25 2007 - 19:15:21 EST


I get this at umount, if there was a failed open():

WARNING: at fs/namespace.c:586 __mntput()

I think the problem is that may_open() calls mnt_want_write(), but if
open doesn't succeed, mnt_drop_write() will not be called.

Miklos
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