Messages in this thread | | | Date | Sat, 10 Jun 2017 18:21:41 -0400 (EDT) | Subject | Re: [PATCH] net: tipc: Fix a sleep-in-atomic bug in tipc_msg_reverse | From | David Miller <> |
| |
From: Jia-Ju Bai <baijiaju1990@163.com> 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_KERNEL) --> may sleep > tipc_node_broadcast > tipc_node_xmit_skb > tipc_node_xmit > tipc_sk_rcv > tipc_msg_reverse > pskb_expand_head(GFP_KERNEL) --> may sleep > > To fix it, "GFP_KERNEL" is replaced with "GFP_ATOMIC". > > Signed-off-by: Jia-Ju Bai <baijiaju1990@163.com>
Applied and queued up for -stable.
| |