diff options
| author | phk <phk@FreeBSD.org> | 2005-03-31 12:19:44 +0000 |
|---|---|---|
| committer | phk <phk@FreeBSD.org> | 2005-03-31 12:19:44 +0000 |
| commit | 7af1e31761f34e698cdf576e46c042b327f5a612 (patch) | |
| tree | 3f79498c2fd283a3ff468ae4f9116e9f395f4fa7 /sys/net/if_tap.c | |
| parent | bf21be6c028410767b09b4755acb72b254e317d8 (diff) | |
| download | FreeBSD-src-7af1e31761f34e698cdf576e46c042b327f5a612.zip FreeBSD-src-7af1e31761f34e698cdf576e46c042b327f5a612.tar.gz | |
Explicitly hold a reference to the cdev we have just cloned. This
closes the race where the cdev was reclaimed before it ever made it
back to devfs lookup.
Diffstat (limited to 'sys/net/if_tap.c')
| -rw-r--r-- | sys/net/if_tap.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/sys/net/if_tap.c b/sys/net/if_tap.c index 46fd276..601b95d 100644 --- a/sys/net/if_tap.c +++ b/sys/net/if_tap.c @@ -253,8 +253,10 @@ tapclone(arg, name, namelen, dev) if (i) { *dev = make_dev(&tap_cdevsw, unit2minor(unit | extra), UID_ROOT, GID_WHEEL, 0600, "%s%d", device_name, unit); - if (*dev != NULL) + if (*dev != NULL) { + dev_ref(*dev); (*dev)->si_flags |= SI_CHEAPCLONE; + } } } /* tapclone */ |
