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| author | imp <imp@FreeBSD.org> | 2004-07-22 23:16:12 +0000 |
|---|---|---|
| committer | imp <imp@FreeBSD.org> | 2004-07-22 23:16:12 +0000 |
| commit | 5f9a1d08785739f2f018ea92ebc54de2cf0b1e29 (patch) | |
| tree | d47d6a098c241e8cb72b329274ce38a905e73145 /sys/dev/sio/sio.c | |
| parent | f3c3c8c6c51a836f82aa9a8111b29eaeac7c3645 (diff) | |
| download | FreeBSD-src-5f9a1d08785739f2f018ea92ebc54de2cf0b1e29.zip FreeBSD-src-5f9a1d08785739f2f018ea92ebc54de2cf0b1e29.tar.gz | |
If you insert a pccard modem and then eject it, you get a panic. This
happens because the sio device was never opened and com->tp is
therefore NULL. ttygone can't swallow a NULL, so guard against that
possibility. Other places in this function make similar checks, so I
believe this is correct.
Diffstat (limited to 'sys/dev/sio/sio.c')
| -rw-r--r-- | sys/dev/sio/sio.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/sys/dev/sio/sio.c b/sys/dev/sio/sio.c index f9086db..fae045f 100644 --- a/sys/dev/sio/sio.c +++ b/sys/dev/sio/sio.c @@ -454,7 +454,8 @@ siodetach(dev) return (0); } com->gone = TRUE; - ttygone(com->tp); + if (com->tp) + ttygone(com->tp); for (i = 0 ; i < 6; i++) destroy_dev(com->devs[i]); if (com->irqres) { |
