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Lock the process before sending it a SIGIO. Not doing so is a panic(2)

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implementation with INVARIANTS.
This commit is contained in:
John Baldwin 2003-04-02 21:54:51 +00:00
parent 316aed030e
commit 6751370f6f
1 changed files with 7 additions and 2 deletions
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9
sys/kern/subr_bus.c
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@ -383,6 +383,7 @@ static void
devaddq(const char *type, const char *what, device_t dev)
{
struct dev_event_info *n1 = NULL;
struct proc *p;
char *data = NULL;
char *loc;
const char *parstr;
@ -412,8 +413,12 @@ devaddq(const char *type, const char *what, device_t dev)
cv_broadcast(&devsoftc.cv);
mtx_unlock(&devsoftc.mtx);
selwakeup(&devsoftc.sel);
if (devsoftc.async_proc)
psignal(devsoftc.async_proc, SIGIO);
p = devsoftc.async_proc;
if (p != NULL) {
PROC_LOCK(p);
psignal(p, SIGIO);
PROC_UNLOCK(p);
}
return;
bad:;
free(data, M_BUS);