[Bug 215373] Unneeded (?) assertion in ttyinq_line_iterate() from sys/kern/tty_inq.c

bugzilla-noreply at freebsd.org bugzilla-noreply at freebsd.org
Sun Dec 18 10:00:28 UTC 2016


https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=215373

            Bug ID: 215373
           Summary: Unneeded (?) assertion in ttyinq_line_iterate() from
                    sys/kern/tty_inq.c
           Product: Base System
           Version: CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: jan.kokemueller at gmail.com

On CURRENT r309302 with debuggin on I'm getting assertions like here:
https://lists.freebsd.org/pipermail/freebsd-current/2011-May/024573.html

They seem to happen randomly on key presses.

Is the second "MPASS(tib != NULL);" needed? Is it possible that "tib->tib_next"
is NULL on the last loop iteration (i.e. offset gets incremented to
ti->ti_end)? The first MPASS should be enough.

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