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irda: fix a potential use-after-free in ircomm_param_request

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self->ctrl_skb is protected by self->spinlock, we should not
access it out of the lock. Move the debugging printk inside.

Reported-by: Dmitry Vyukov <[email protected]>
Cc: Samuel Ortiz <[email protected]>
Signed-off-by: Cong Wang <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
WANG Cong 2016-01-29 11:58:03 -08:00 • committed by David S. Miller
commit 3d45296ab9
1 changed files with 1 additions and 2 deletions
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3
net/irda/ircomm/ircomm_param.c
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@ -134,11 +134,10 @@ int ircomm_param_request(struct ircomm_tty_cb *self, __u8 pi, int flush)
return -1;
}
skb_put(skb, count);
pr_debug("%s(), skb->len=%d\n", __func__, skb->len);
spin_unlock_irqrestore(&self->spinlock, flags);
pr_debug("%s(), skb->len=%d\n", __func__ , skb->len);
if (flush) {
/* ircomm_tty_do_softint will take care of the rest */
schedule_work(&self->tqueue);