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freebsd/sys/nfsserver
Kirk McKusick 96438eb911 The code checks each fragment mark to see if it's valid; if the fragment
is less than NFS_MINPACKET or greater than NFS_MAXPACKET in size, it
barfs and, I think, drops the connection.

However, there's no guarantee that in a multi-fragment RPC, all the
fragments will be at least as large as NFS_MINPACKET.

In fact, with the version of "tclnfs" we have here, which supports NFS
over TCP, at least when built under SunOS 4.1.3 (i.e., with 4.1.3's
user-mode ONC RPC library), I can *repeatably* cause "tclnfs" to send a
request with more than one fragment, one of which is only 8 bytes long.
I just do a 3877-byte write to a file, at an offset of 0.

The check that "slp->ns_reclen" is greater than or equal to
NFS_MINPACKET serves no useful purpose - if the NFS server code can't
handle packets < NFS_MINPACKET bytes, it can't handle them over *any*
protocol, so the check has to be done above the RPC-over-TCP layer - and
should be removed.
Obtained from: Fix from Guy Harris, forwarded by Rick Macklem.
1998-09-29 22:33:05 +00:00
..
nfs_serv.c This commit fixes various 64bit portability problems required for 1998-06-07 17:13:14 +00:00
nfs_srvcache.c Moved `#ifndef NFS_NOSERVER' after including nfs.h. 1998-07-02 12:41:42 +00:00
nfs_srvsock.c The code checks each fragment mark to see if it's valid; if the fragment 1998-09-29 22:33:05 +00:00
nfs_srvsubs.c Made unloading of the nfs LKM sort of work. This is mainly to test 1998-09-07 05:42:15 +00:00
nfs_syscalls.c Check for NULL pointer before freeing a struct sockaddr. m_freem() can handle 1998-09-01 02:31:52 +00:00
nfs.h Made unloading of the nfs LKM sort of work. This is mainly to test 1998-09-07 05:42:15 +00:00
nfsm_subs.h For the on-the-wire protocol, u_long -> u_int32_t; long -> int32_t; 1998-05-31 20:09:01 +00:00
nfsproto.h For the on-the-wire protocol, u_long -> u_int32_t; long -> int32_t; 1998-05-31 20:09:01 +00:00
nfsrvcache.h For the on-the-wire protocol, u_long -> u_int32_t; long -> int32_t; 1998-05-31 20:09:01 +00:00
nfsrvstats.h Made unloading of the nfs LKM sort of work. This is mainly to test 1998-09-07 05:42:15 +00:00