Konstantin Belousov 5c61c646a3 The clear_remove() and clear_inodedeps() call vn_start_write(NULL, &mp,
V_NOWAIT) on the non-busied mount point. Unmount might free ufs-specific
mp data, causing ffs_vgetf() to access freed memory.

Busy mountpoint before dropping softdep lk.

Noted and reviewed by:	tegge
Tested by:	pho
MFC after:	1 week
2009-09-06 11:46:51 +00:00
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