netlink sock_release 死机

zhanlongzaiye

if(g_nl_sk != NULL)  
{  
      sock_release(g_nl_sk->sk_socket);  
}


用户态和内核态用netlink交互，运行的时候没事，但在模块卸载的时候调用了上面这个代码，每次退出都会导致系统崩溃，如果不调用，经过多次卸载，也会出现系统崩溃的现象，求各位大神帮忙分析下原因

Godbach

回复 1# zhanlongzaiye
有 Oops 吗，贴一下。

whaaat

什么版本的？现在有netlink_kernel_release接口了

yy心若冰清

我的也出现了这样的问题，内核态下使用netlink与用户态交互，并在内核态创建了内核线程处理接收的信息，结果在kill 用户态的时候就挂了。。。：
[  429.030744] WARNING: at /home/data/ngcf/src/git-rgosm-build/code/kernel/kernel-2.6.32-longterm/net/netlink/af_netlink.c:169 netlink_sock_destruct+0x99/0xa0()
[  429.035427] Hardware name: VMware Virtual Platform
[  429.037102] Modules linked in: echo_kernel [last unloaded: echo_kernel]
[  429.041023] Pid: 824, comm: echo_netlink_cl Tainted: G        W  2.6.32.38 #1
[  429.043808] Call Trace:
[  429.045854]  [<c1339be9>] ? netlink_sock_destruct+0x99/0xa0
[  429.047660]  [<c103757c>] warn_slowpath_common+0x7c/0xa0
[  429.050176]  [<c1339be9>] ? netlink_sock_destruct+0x99/0xa0
[  429.052376]  [<c10375b5>] warn_slowpath_null+0x15/0x20
[  429.054788]  [<c1339be9>] netlink_sock_destruct+0x99/0xa0
[  429.056485]  [<c131dfe6>] __sk_free+0x16/0xe0
[  429.058471]  [<c131e0c9>] sk_free+0x19/0x20
[  429.061425]  [<c133abaa>] netlink_release+0x18a/0x220
[  429.063852]  [<c10ca3db>] ? __d_free+0x2b/0x40
[  429.065296]  [<c131a5ab>] sock_release+0x1b/0x70
[  429.068064]  [<c131a612>] sock_close+0x12/0x30
[  429.069501]  [<c10bc44f>] __fput+0xdf/0x1d0
[  429.070812]  [<c10bc559>] fput+0x19/0x20
[  429.074966]  [<c10b93f7>] filp_close+0x47/0x70
[  429.076542]  [<c10391f9>] put_files_struct+0x99/0xb0
[  429.078092]  [<c103924b>] exit_files+0x3b/0x50
[  429.079519]  [<c1039752>] do_exit+0xe2/0x6d0
[  429.080884]  [<c10459e2>] ? recalc_sigpending+0x12/0x30
[  429.082538]  [<c1045e45>] ? dequeue_signal+0x65/0x180
[  429.084318]  [<c1364cd2>] ? arp_rcv+0x92/0xd0
[  429.085731]  [<c1364c40>] ? arp_rcv+0x0/0xd0
[  429.087123]  [<c1039d73>] do_group_exit+0x33/0x90
[  429.089543]  [<c1047661>] get_signal_to_deliver+0x181/0x370
[  429.091437]  [<c1002509>] do_notify_resume+0x99/0x850
[  429.093794]  [<c10291d4>] ? set_next_entity+0xb4/0xd0
[  429.095550]  [<c103d299>] ? tasklet_action+0x49/0xa0
[  429.097193]  [<c103d1a4>] ? irq_exit+0x34/0x70
[  429.099289]  [<c101792c>] ? smp_apic_timer_interrupt+0x5c/0x90
[  429.101198]  [<c1002ea6>] work_notifysig+0x13/0x19
[  429.105455] ---[ end trace 5003dee8a2e53813 ]---
哪位大仙知道呀，求教求教~~~

Fart_King

我也遇到了这种情况 还没有解决方法吗

Fart_King

回复 2# Godbach


    版主 这问题有解决方法了吗

Jacob_linux

我之前出现过这个问题 ，结果竟然是，在收消息的回调中使用kfree(skb) 释放的， 应该是kfree_skb就没问题了