Patch-ID# 100303-02
Keywords: tcp loop using loopback
Synopsis: SunOS 4.1;4.1.1;4.1.2: system freezes using loopback interface
Date: 06/Jan/92

SunOS release: 4.1 4.1.1 4.1.2

Topic: tcp loop using loopback

BugID's fixed with this patch: 1047408

Architectures for which this patch is available: sun3 sun3x sun4 sun4c sun4m

Problem description:

	Under certain condetions the tcp code gets in a loop
	and continously sends acks, when using the loopback
	interface this freezes the system.

Fix description:

	2/6/92 This version of the patch contains the additional binary
	for sun4m architecture.

	The fix includes patched version of:

                tcp_input.o

Install instructions:

   As root, make a backup copy of files to be patched:

        cd /sys/{sun3,sun3x,sun4,sun4c,sun4m}/OBJ
	
   Now, install the patched files and set premissions:

        mv /sys/`arch -k`/OBJ/tcp_input.o /sys/`arch -k`/OBJ/tcp_input.o_orig
        cp `arch -k`/tcp_input.o /sys/`arch -k`/OBJ/tcp_input.o
        chmod 444 /sys/`arch -k`/OBJ/tcp_input.o
 
   Then a new kernel will need to be made.