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Add some checks to prevent NULL dereferences.

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Submitted by:	jhay
This commit is contained in:
Dag-Erling Smørgrav 2002-05-28 14:29:56 +00:00
parent 8eb0098f4c
commit 6b658142fd
1 changed files with 6 additions and 3 deletions
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9
sys/kern/tty.c
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@ -2593,12 +2593,15 @@ sysctl_kern_ttys(SYSCTL_HANDLER_ARGS)
xt.xt_cancc = tp->t_canq.c_cc;
xt.xt_outcc = tp->t_outq.c_cc;
XT_COPY(line);
xt.xt_dev = dev2udev(tp->t_dev);
if (tp->t_dev)
xt.xt_dev = dev2udev(tp->t_dev);
XT_COPY(state);
XT_COPY(flags);
XT_COPY(timeout);
xt.xt_pgid = tp->t_pgrp->pg_id;
xt.xt_sid = tp->t_session->s_sid;
if (tp->t_pgrp)
xt.xt_pgid = tp->t_pgrp->pg_id;
if (tp->t_session)
xt.xt_sid = tp->t_session->s_sid;
XT_COPY(termios);
XT_COPY(winsize);
XT_COPY(column);