Konstantin Belousov 9604a7f1b8 Fix several unsafe pointer dereferences in the buffered_write() ... function, implementing the sysctl vfs.ffs.set_bufoutput (not used in the tree yet). - The current directory vnode dereference is unsafe since fd_cdir could be changed and unreferenced, lock the filedesc around and vref the fd_cdir. - The VTOI() conversion of the fd_cdir is unsafe without first checking that the vnode is indeed from an FFS mount, otherwise the code dereferences a random memory. - The cdir could be reclaimed from under us, lock it around the checks. - The type of the fp vnode might be not a disk, or it might have changed while the thread was in flight, check the type. Reviewed and tested by: mckusick MFC after: 2 weeks		2013-02-10 10:17:33 +00:00
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ffs	Fix several unsafe pointer dereferences in the buffered_write()	2013-02-10 10:17:33 +00:00
ufs	Remove unused MAXSYMLINKLEN macro.	2013-02-08 20:30:19 +00:00