Hi. As we upgraded to freeBSD 2.2.6-STABLE the following bug came to my attention: when linking a device like /dev/null to a file on a NFS mounted fs the machien freeses. This has been reported to freeBSD, however bsdi seems to be vulnerable too. Crashes have also been reported on 2.2.5 systems A short ugly hack follows: It 'fixes' this by not allowing a device to be hard-linked period. Someone fix this proper please :) Arend-jan Wijtzes, ajat_private, Chief sysadmin M.C.G.V. Stack --- Cut here --- --- /usr/src/sys/kern/vfs_syscalls.c Thu May 28 15:46:03 1998 +++ /usr/src/sys/kern/vfs_syscalls.c Thu May 28 15:47:28 1998 @@ -904,7 +904,9 @@ if (error) return (error); vp = nd.ni_vp; - if (vp->v_type == VDIR) + if ((vp->v_type == VCHR) || (vp->v_type == VBLK)) + error = EPERM; /* STACK HACK gehaktdag */ + else if (vp->v_type == VDIR) error = EPERM; /* POSIX */ else { NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, uap->link, p); --- Cut here ---
This archive was generated by hypermail 2b30 : Fri Apr 13 2001 - 13:55:37 PDT