Hi,
I tried with kernel 3.12 but I still get the same error. Just to clarify, if wmediumd would work properly you should see in the ping approximately half of the packets being dropped, because the configuration file has 0.5 drop probability for all rates. If you see that the ping proceeds normally is because the error happened and wmediumd de-registered.
I attach the error I see in syslog.
Best Regards
Daniel
El Jueves 5 de diciembre de 2013 18:40, Johannes Berg <johannes@xxxxxxxxxxxxxxxx> escribió:
On Thu, 2013-12-05 at 16:42 +0000, Dani Camps wrote:
> ping -I mesh0 192.168.77.11
Works fine for me. Maybe you should try a later backports version, e.g.
3.12? I don't remember fixing anything, but I don't see any issues
either.
johannes
Dec 5 13:28:21 mininet-vm kernel: [ 261.300120] mac80211_hwsim: received a REGISTER, switching to wmediumd mode with pid 1561
Dec 5 13:28:44 mininet-vm kernel: [ 284.292247] BUG: unable to handle kernel NULL pointer dereference at 00000004
Dec 5 13:28:44 mininet-vm kernel: [ 284.292247] IP: [<f81ddf99>] mac80211_hwsim_monitor_ack.isra.19.part.20+0x49/0x120 [mac80211_hwsim]
Dec 5 13:28:44 mininet-vm kernel: [ 284.292247] *pde = 7ebc1067
Dec 5 13:28:44 mininet-vm kernel: [ 284.292247] Oops: 0000 [#1] SMP
Dec 5 13:28:44 mininet-vm kernel: [ 284.292247] Modules linked in: arc4 mac80211_hwsim mac80211 cfg80211 compat vesafb ppdev joydev snd_intel8x0 snd_ac97_codec ac97_bus binfmt_misc snd_pcm psmouse serio_raw parport_pc snd_timer snd soundcore snd_page_alloc i2c_piix4 lp parport usbhid hid ahci libahci e1000
Dec 5 13:28:44 mininet-vm kernel: [ 284.292247]
Dec 5 13:28:44 mininet-vm kernel: [ 284.292247] Pid: 1561, comm: wmediumd Tainted: G W 3.0.0-12-generic #20-Ubuntu innotek GmbH VirtualBox/VirtualBox
Dec 5 13:28:44 mininet-vm kernel: [ 284.292247] EIP: 0060:[<f81ddf99>] EFLAGS: 00010287 CPU: 0
Dec 5 13:28:44 mininet-vm kernel: [ 284.292247] EIP is at mac80211_hwsim_monitor_ack.isra.19.part.20+0x49/0x120 [mac80211_hwsim]
Dec 5 13:28:44 mininet-vm kernel: [ 284.292247] EAX: f28e3640 EBX: f2dc3900 ECX: f2dc3900 EDX: 00000016
Dec 5 13:28:44 mininet-vm kernel: [ 284.292247] ESI: f28e3c58 EDI: 00000004 EBP: f2d0bc34 ESP: f2d0bc28
Dec 5 13:28:44 mininet-vm kernel: [ 284.292247] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
Dec 5 13:28:44 mininet-vm kernel: [ 284.292247] Process wmediumd (pid: 1561, ti=f2d0a000 task=f2986600 task.ti=f2d0a000)
Dec 5 13:28:44 mininet-vm kernel: [ 284.292247] Stack:
Dec 5 13:28:44 mininet-vm kernel: [ 284.292247] f2dc3c00 f2dc3c2c f2dc3c21 f2d0bc60 f81de54c 00000004 f2d0bc8c f2dc3c00
Dec 5 13:28:44 mininet-vm kernel: [ 284.292247] f29295a0 f2dc3c00 00000000 f81e3260 f81e31c0 00000000 f2d0bcbc c145d4f4
Dec 5 13:28:44 mininet-vm kernel: [ 284.292247] 00000038 f81e32a0 00000008 f81e32a0 00000004 c1943e40 f28e3410 f2dc3600
Dec 5 13:28:44 mininet-vm kernel: [ 284.292247] Call Trace:
Dec 5 13:28:44 mininet-vm kernel: [ 284.292247] [<f81de54c>] hwsim_tx_info_frame_received_nl+0x1dc/0x1e0 [mac80211_hwsim]
Dec 5 13:28:44 mininet-vm kernel: [ 284.292247] [<c145d4f4>] genl_rcv_msg+0x1c4/0x240
Dec 5 13:28:44 mininet-vm kernel: [ 284.292247] [<c145d330>] ? genl_rcv+0x30/0x30
Dec 5 13:28:44 mininet-vm kernel: [ 284.292247] [<c145ce9e>] netlink_rcv_skb+0x8e/0xb0
Dec 5 13:28:44 mininet-vm kernel: [ 284.292247] [<c145d31c>] genl_rcv+0x1c/0x30
Dec 5 13:28:44 mininet-vm kernel: [ 284.292247] [<c145c8a9>] netlink_unicast+0x239/0x290
Dec 5 13:28:44 mininet-vm kernel: [ 284.292247] [<c145cb5b>] netlink_sendmsg+0x25b/0x2e0
Dec 5 13:28:44 mininet-vm kernel: [ 284.292247] [<c1425d7c>] sock_sendmsg+0xec/0x110
Dec 5 13:28:44 mininet-vm kernel: [ 284.292247] [<c10320d2>] ? check_preempt_curr+0x72/0x90
Dec 5 13:28:44 mininet-vm kernel: [ 284.292247] [<c128836f>] ? __copy_from_user_ll+0x1f/0x40
Dec 5 13:28:44 mininet-vm kernel: [ 284.292247] [<c1288502>] ? _copy_from_user+0x42/0x60
Dec 5 13:28:44 mininet-vm kernel: [ 284.292247] [<c1430d44>] ? verify_iovec+0x44/0xb0
Dec 5 13:28:44 mininet-vm kernel: [ 284.292247] [<c1427590>] __sys_sendmsg+0x270/0x280
Dec 5 13:28:44 mininet-vm kernel: [ 284.292247] [<c1041600>] ? default_wake_function+0x10/0x20
Dec 5 13:28:44 mininet-vm kernel: [ 284.292247] [<c102e277>] ? __wake_up_common+0x47/0x70
Dec 5 13:28:44 mininet-vm kernel: [ 284.292247] [<c102fa85>] ? __wake_up+0x45/0x60
Dec 5 13:28:44 mininet-vm kernel: [ 284.292247] [<c1311049>] ? tty_wakeup+0x39/0x70
Dec 5 13:28:44 mininet-vm kernel: [ 284.292247] [<c131ab29>] ? pty_write+0x69/0x70
Dec 5 13:28:44 mininet-vm kernel: [ 284.292247] [<c1026018>] ? default_spin_lock_flags+0x8/0x10
Dec 5 13:28:44 mininet-vm kernel: [ 284.292247] [<c152c6fd>] ? _raw_spin_lock_irqsave+0x2d/0x40
Dec 5 13:28:44 mininet-vm kernel: [ 284.292247] [<c102fa85>] ? __wake_up+0x45/0x60
Dec 5 13:28:44 mininet-vm kernel: [ 284.292247] [<c115bc88>] ? fsnotify+0x198/0x250
Dec 5 13:28:44 mininet-vm kernel: [ 284.292247] [<c142839b>] sys_sendmsg+0x3b/0x60
Dec 5 13:28:44 mininet-vm kernel: [ 284.292247] [<c1428a23>] sys_socketcall+0x263/0x2c0
Dec 5 13:28:44 mininet-vm kernel: [ 284.292247] [<c152c8e4>] syscall_call+0x7/0xb
Dec 5 13:28:44 mininet-vm kernel: [ 284.292247] Code: 84 bd 00 00 00 ba 16 00 00 00 e8 23 f2 24 c9 c6 00 00 c6 40 01 00 66 c7 40 02 16 00 c7 40 04 0a 00 00 00 c6 40 10 00 c6 40 11 00 <0f> b7 17 8d 7b 18 66 c7 40 14 80 00 66 89 50 12 ba 0a 00 00 00
Dec 5 13:28:44 mininet-vm kernel: [ 284.292247] EIP: [<f81ddf99>] mac80211_hwsim_monitor_ack.isra.19.part.20+0x49/0x120 [mac80211_hwsim] SS:ESP 0068:f2d0bc28
Dec 5 13:28:44 mininet-vm kernel: [ 284.292247] CR2: 0000000000000004
Dec 5 13:28:44 mininet-vm kernel: [ 284.493005] ---[ end trace a7919e7f17c0a728 ]---
Dec 5 13:28:44 mininet-vm kernel: [ 284.496382] mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
