From: Jia-Ju Bai
Date: Sat, 10 Jun 2017 17:03:35 +0800
> The kernel may sleep under a rcu read lock in tipc_msg_reverse, and the
> function call path is:
> tipc_l2_rcv_msg (acquire the lock by rcu_read_lock)
> tipc_rcv
> tipc_sk_rcv
> tipc_msg_reverse
> pskb_expand_head(GFP_KE
ernel.org; Jia-Ju Bai
> Subject: [PATCH] net: tipc: Fix a sleep-in-atomic bug in tipc_msg_reverse
>
> The kernel may sleep under a rcu read lock in tipc_msg_reverse, and the
> function call path is:
> tipc_l2_rcv_msg (acquire the lock by rcu_read_lock)
> tipc_rcv
>
The kernel may sleep under a rcu read lock in tipc_msg_reverse, and the
function call path is:
tipc_l2_rcv_msg (acquire the lock by rcu_read_lock)
tipc_rcv
tipc_sk_rcv
tipc_msg_reverse
pskb_expand_head(GFP_KERNEL) --> may sleep
tipc_node_broadcast
tipc_node_xmit_skb
tipc_n
