Patch-ID# 100507-05
Keywords: tmpfs security crash fail assertion leaks anonymous tmp_rename panic sparse files
Synopsis: SunOS 4.1.1, 4.1.2, 4.1.3: tmpfs jumbo patch
Date: Jan/28/94
 
SunOS release: 4.1.1 4.1.2 4.1.3 4.1.3C
 
Unbundled Product: 
 
Unbundled Release:
 
Topic: fixes for several tmpfs bugs
 
BugId's fixed with this patch: 1038651 1091294 1089447 1083412 1154340

Architectures for which this patch is available: sun4 sun4c sun4m

Obsoleted by: patches upto rev-4 have been integrated in 4.1.3_U1

Changes incorporated in this version: 1154340

Problem Description:

These files contain bug fixes for the following bugs:

1154340: tmpfs can zero out sparse files on reading.
1038651: Using tmpfs ie ram /tmp can cause data initialization with
         Fortran on SunOS 4.1.
1091294: tmpfs "leaks" anonymous memory
1089447: panic: tmp_rename
1083412: copying files from an nfs mounted partition to a tmpfs mount
			can result in security breach

INSTALL:

mv the new versions of tmp_dir.o, tmp_subr.o, tmp_tnode.o, tmp_vfsops.o,
and tmp_vnodeops.o into /sys/($arch -k)/OBJ after first saving the 
old versions aside as a precaution.

As root:

mv /sys/`arch -k`/OBJ/tmp_dir.o /sys/`arch -k`/OBJ/tmp_dir.o.FCS
mv /sys/`arch -k`/OBJ/tmp_subr.o /sys/`arch -k`/OBJ/tmp_subr.o.FCS
mv /sys/`arch -k`/OBJ/tmp_tnode.o /sys/`arch -k`/OBJ/tmp_tnode.o.FCS
mv /sys/`arch -k`/OBJ/tmp_vfsops.o /sys/`arch -k`/OBJ/tmp_vfsops.o.FCS
mv /sys/`arch -k`/OBJ/tmp_vnodeops.o /sys/`arch -k`/OBJ/tmp_vnodeops.o.FCS
mv `arch -k`/{OS Version}/tmp_dir.o /sys/`arch -k`/OBJ/tmp_dir.o
mv `arch -k`/{OS Version}/tmp_subr.o /sys/`arch -k`/OBJ/tmp_subr.o
mv `arch -k`/{OS Version}/tmp_tnode.o /sys/`arch -k`/OBJ/tmp_tnode.o
mv `arch -k`/{OS Version}/tmp_vfsops.o /sys/`arch -k`/OBJ/tmp_vfsops.o
mv `arch -k`/{OS Version}/tmp_vnodeops.o /sys/`arch -k`/OBJ/tmp_vnodeops.o

Run /etc/config on your kernel and do a make. Install the newly configured
vmunix and reboot. Refer to the Systems and Network administrations manual
on how to configure a kernel.