Dani Camps <danicamps81@...> writes: > > 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 > Hi Dani, Johannes, I was able to reproduce your issue with latest version of wireless-testing and wmediumd. The problem is that txi->rate_driver_data[0] is not set on hwsim_tx_info_frame_received_nl(). Later mac80211_hwsim_monitor_ack() crashes while accessing that information. I'm preparing a patch to fix this. Jlo > El Jueves 5 de diciembre de 2013 18:40, Johannes Berg <johannes <at> sipsolutions.net> 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 > -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
