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9p: Use kthread_stop instead of sending a SIGKILL.

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Since the kthread api does not bump the reference count on
processes that tracked it is not safe allow user space to
kill the threads, as I still retain a pointer to the task_struct.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Acked-by: Eric Van Hensbergen <ericvh@gmail.com>
This commit is contained in:
Eric W. Biederman 2006-12-12 15:26:07 -07:00 committed by Eric Van Hensbergen
parent 8a03d9a498
commit 2c0463a9ae
1 changed files with 1 additions and 4 deletions
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5
fs/9p/mux.c
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@ -256,7 +256,7 @@ static void v9fs_mux_poll_stop(struct v9fs_mux_data *m)
vpt->muxnum--;
if (!vpt->muxnum) {
dprintk(DEBUG_MUX, "destroy proc %p\n", vpt);
send_sig(SIGKILL, vpt->task, 1);
kthread_stop(vpt->task);
vpt->task = NULL;
v9fs_mux_poll_task_num--;
}
@ -438,11 +438,8 @@ static int v9fs_poll_proc(void *a)
vpt = a;
dprintk(DEBUG_MUX, "start %p %p\n", current, vpt);
allow_signal(SIGKILL);
while (!kthread_should_stop()) {
set_current_state(TASK_INTERRUPTIBLE);
if (signal_pending(current))
break;
list_for_each_entry_safe(m, mtmp, &vpt->mux_list, mux_list) {
v9fs_poll_mux(m);