diff options
| author | Jia-Ju Bai <baijiaju1990@163.com> | 2017-06-10 17:03:35 +0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-06-10 18:20:38 -0400 |
| commit | 343eba69c6968190d8654b857aea952fed9a6749 (patch) | |
| tree | 05088e941fe1061b7d12f351302be316949352c0 /drivers | |
| parent | f146e872eb12ebbe92d8e583b2637e0741440db3 (diff) | |
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
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>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
0 files changed, 0 insertions, 0 deletions