>Number:         3047
>Category:       port-arm32
>Synopsis:       Kernel panics when Web-browsing in X over PPP connection
>Confidential:   yes
>Severity:       serious
>Priority:       medium
>Responsible:    gnats-admin (GNATS administrator)
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Dec 19 04:50:01 1996
>Last-Modified:
>Originator:     Mike Pumford
>Organization:
	None
>Release:        1.2_BETA
>Environment:
Acorn RiscPC 32MB DRAM 2MB VRAM 
		ARM610 processor, 3.2GB + 850MB IDE disks
		Acorn SCSI card, Pioneer DRM602X SCSI2 CDROM, IBM 115MB
		Hard Disk, Zoom 28.8 V34 Modem. 
		NetBSD-current kernel.
System: NetBSD black-star 1.2B NetBSD 1.2B (BLACK-STAR) #23: Tue Dec 17 00:48:10 GMT 1996 mpumford@black-star:/usr/src/sys/arch/arm32/compile/BLACK-STAR arm32


>Description:
	A data abort occurs in com_start when web browsing with Mosaic 
	under X11R6.1. It seems to be timing related as it only occurs
	when using Mosaic. All text mode TCP applications work correctly 
	when running in an xterm. The stack bactrace for this problem is 
	as follows:
		_data_abort_handler
		_com_start
		_pppstart
		_ppp_outpkt
		_pppintr
		_dosoftints

	This sequence is repeated several times on the stack trace.

>How-To-Repeat:
	Run Mosaic under X across a PPP link after a while the X session
	will appear to have hung. Switching to virtual terminal 0 after
	this hang reveals the 'db>' prompt.
>Fix:
	Unknown.
>Audit-Trail:
>Unformatted: