OBSOLETE Patch-ID# 100475-01
Keywords: galaxy mmap failure trap 
Synopsis: OBSOLETED by 100542
Date: 16/Jan/92

SunOS release: 4.1.2

Unbundled Product: 

Unbundled Release: 

Topic: A user mode data fetch causes an Mbus timeout and a kernel trap

BugId's fixed with this patch: 1073234

Architectures for which this patch is available: sun4m

Patches which may conflict with this patch: 

Obsoleted by: 100542

Files included with this patch: format

Problem Description: A user data fetch via mmap of a non-existent memory
			address causes an Mbus timeout and trap() was
			then generating a BAD TRAP, the fix is to send
			a SIGBUS to the user process instead.

Install Instructions:

As root, make a backup copy of trap.o:

	mv /sys/sun4m/OBJ/trap.o /sys/sun4m/OBJ/trap.o.FCS

Now install the patched trap.o:

	cp trap.o /sys/sun4m/OBJ

Rebuild the new kernel.
Please refer to the system and networking administration manual
for details on building and installing a new kernel.