diff options
| -rw-r--r-- | sys/kern/sys_pipe.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/sys/kern/sys_pipe.c b/sys/kern/sys_pipe.c index 76e23b7..c5b39e0 100644 --- a/sys/kern/sys_pipe.c +++ b/sys/kern/sys_pipe.c @@ -1467,7 +1467,6 @@ pipe_kqfilter(struct file *fp, struct knote *kn) default: return (1); } - kn->kn_hook = cpipe; PIPE_LOCK(cpipe); SLIST_INSERT_HEAD(&cpipe->pipe_sel.si_note, kn, kn_selnext); @@ -1478,7 +1477,13 @@ pipe_kqfilter(struct file *fp, struct knote *kn) static void filt_pipedetach(struct knote *kn) { - struct pipe *cpipe = (struct pipe *)kn->kn_hook; + struct pipe *cpipe = (struct pipe *)kn->kn_fp->f_data; + + if (kn->kn_filter == EVFILT_WRITE) { + if (cpipe->pipe_peer == NULL) + return; + cpipe = cpipe->pipe_peer; + } PIPE_LOCK(cpipe); SLIST_REMOVE(&cpipe->pipe_sel.si_note, kn, knote, kn_selnext); |
