>Number:         8033
>Category:       kern
>Synopsis:       ELF modload causes kernel crash when trying to load a.out
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people (Kernel Bug People)
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Jul 19 12:35:01 1999
>Last-Modified:
>Originator:     Charles M. Hannum
>Organization:
	Internetwork Hacker
>Release:        1.4G, 1999/07/18
>Environment:
	1.4G/i386


>Description:
	When given an a.out kernel and an a.out AFS module, the ELF
	modload causes a crash, rather than failing gracefully:

ld: warning: cannot find entry symbol afsmodload; defaulting to 00000000
ld: warning: cannot find entry symbol afsmodload; defaulting to f2ff4000
uvm_fault(0xf0265490, 0xf3027000, 0, 3) -> 1
..
Stopped in modload at   0xf2ff4009:     incl    0xf3027510

	The kernel and module pair worked fine with the old a.out
	modload.

>How-To-Repeat:
	Kernel and AFS module can be supplied on request.

>Fix:
	If the new modload cannot handle a.out, it should fail
	gracefully, with an error message, and not crash the system.

>Audit-Trail:
>Unformatted: