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kern/39187: sysetm crash when killing pppd

>Number:         39187
>Category:       kern
>Synopsis:       sysetm crash when killing pppd
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Jul 21 20:30:02 +0000 2008
>Originator:     Alan Barrett
>Release:        NetBSD 4.99.69
Not much
System: NetBSD 4.99.69
Architecture: i386
Machine: i386
        The system crashed when I killed a pppd process.

        I was in X at the time, and could not switch to the text console
        or enter ddb or obtain a kernel core dump.

        The pppd process was accessing a com port on a pcmcia card at the
        time of the crash.

        Insert pcmcia modem card (com at pcmcia at cardslot at cbb at

        Run pppd.

        kill -1 ${pid_of_pppd}

        watch system crash.
        Unknown, but possibly related to PR 39035 and PR 39131.  (It was the
        same modem card in all these PRs.)

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