Kernel panics when I do "ifconfig wlan0 destroy". running 11-CURRENT r289562 on a Thinkpad x220t. Panic happens both when wlan0 is part of lagg interface or when it is not. Also wpa_supplicant won't work unless I wait for 10sec after creating the interface. core.txt.1: http://tim.tek42.de/core.txt.1 And I get this lock order reversal message when creating a lagg interface: wlan0: Ethernet address: a0:88:b4:97:62:b8 Created wlan(4) interfaces: wlan0. Created clone interfaces: lagg0. iwn0: iwn_read_firmware: ucode rev=0x12a80601 lock order reversal: lagg0: link state changed to DOWN 1st 0xfffff80010f6fa08 if_lagg rmlock (if_lagg rmlock) @ /usr/src/sys/modules/if_lagg/../../net/if_lagg.c:1445 2nd 0xfffff80010f73190 if_addr_lock (if_addr_lock) @ /usr/src/sys/modules/if_lagg/../../net/if_lagg.c:1549 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe046272f5f0 witness_checkorder() at witness_checkorder+0xe79/frame 0xfffffe046272f670 _rw_wlock_cookie() at _rw_wlock_cookie+0x6e/frame 0xfffffe046272f6b0 lagg_ether_cmdmulti() at lagg_ether_cmdmulti+0x5c/frame 0xfffffe046272f6f0 lagg_ioctl() at lagg_ioctl+0x1175/frame 0xfffffe046272f7d0 ifioctl() at ifioctl+0x10c6/frame 0xfffffe046272f860 kern_ioctl() at kern_ioctl+0x230/frame 0xfffffe046272f8c0 sys_ioctl() at sys_ioctl+0x17e/frame 0xfffffe046272f9a0 amd64_syscall() at amd64_syscall+0x2de/frame 0xfffffe046272fab0 Xfast_syscall() at Xfast_syscall+0xfb/frame 0xfffffe046272fab0 --- syscall (54, FreeBSD ELF64, sys_ioctl), rip = 0x8011f316a, rsp = 0x7fffffffe3d8, rbp = 0x7fffffffe450 --- iwn0: iwn_read_firmware: ucode rev=0x12a80601 lock order reversal: 1st 0xfffff80010f6fa08 if_lagg rmlock (if_lagg rmlock) @ /usr/src/sys/modules/if_lagg/../../net/if_lagg.c:1498 2nd 0xfffffe0000f576c0 em0 (EM Core Lock) @ /usr/src/sys/dev/e1000/if_em.c:1223 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe046272f010 witness_checkorder() at witness_checkorder+0xe79/frame 0xfffffe046272f090 __mtx_lock_flags() at __mtx_lock_flags+0xa4/frame 0xfffffe046272f0e0 em_ioctl() at em_ioctl+0x94/frame 0xfffffe046272f120 lagg_port_ioctl() at lagg_port_ioctl+0xde/frame 0xfffffe046272f190 if_addmulti() at if_addmulti+0x253/frame 0xfffffe046272f210 lagg_ether_cmdmulti() at lagg_ether_cmdmulti+0x158/frame 0xfffffe046272f250 lagg_ioctl() at lagg_ioctl+0xed/frame 0xfffffe046272f330 if_addmulti() at if_addmulti+0x253/frame 0xfffffe046272f3b0 in6_mc_join_locked() at in6_mc_join_locked+0x1a6/frame 0xfffffe046272f440 in6_joingroup() at in6_joingroup+0x75/frame 0xfffffe046272f480 in6_update_ifa() at in6_update_ifa+0x1228/frame 0xfffffe046272f620 in6_ifattach() at in6_ifattach+0x45a/frame 0xfffffe046272f7d0 ifioctl() at ifioctl+0xf2b/frame 0xfffffe046272f860 kern_ioctl() at kern_ioctl+0x230/frame 0xfffffe046272f8c0 sys_ioctl() at sys_ioctl+0x17e/frame 0xfffffe046272f9a0 amd64_syscall() at amd64_syscall+0x2de/frame 0xfffffe046272fab0 Xfast_syscall() at Xfast_syscall+0xfb/frame 0xfffffe046272fab0 --- syscall (54, FreeBSD ELF64, sys_ioctl), rip = 0x8011f316a, rsp = 0x7fffffffe448, rbp = 0x7fffffffe4a0 --- Starting Network: lo0 em0 wlan0 lagg0. ----------- /boot/loader.conf: autoboot_delay="3" zfs_load="YES" i915kms_load="YES" usb_quirk_load="YES" kern.vty="vt" hint.p4tcc.0.disabled=1 hint.p4tcc.1.disabled=1 hint.acpi_throttle.0.disabled=1 hint.acpi_throttle.1.disabled=1 kern.hz=100 drm.i915.enable_rc6=7 hint.ahcich.0.pm_level=5 hint.ahcich.1.pm_level=5 #hint.ehci.0.wake=1 #hint.ehci.1.wake=1 vfs.zfs.arc_max="8192M" acpi_ibm_load="YES" cuse4bsd_load="YES" hint.psm.0.flags="0x3000" hw.psm.synaptics_support=1 ---------- root@xolotl:~ # uname -a FreeBSD xolotl.youpr0n.org 11.0-CURRENT FreeBSD 11.0-CURRENT #0 r289562: Mon Oct 19 15:59:05 CEST 2015 root@xolotl.youpr0n.org:/usr/obj/usr/src/sys/GENERIC amd64
Hi, The wpa_supplicant not working unless waiting for 10secs after creating the wlan interface issue seems to be fixed in r289718 The kernel panic issue when destroying the wlan interface however does persist, not always though, when the system had been up for hours I have not been able to reproduce it at all, when I had just booted it, it crashed at every try. Fatal trap 9: general protection fault while in kernel mode cpuid = 0; apic id = 00 instruction pointer = 0x20:0xffffffff80b3ff48 stack pointer = 0x28:0xfffffe0460f20940 frame pointer = 0x28:0xfffffe0460f20960 code segment = base rx0, limit 0xfffff, type 0x1b = DPL 0, pres 1, long 1, def32 0, gran 1 processor eflags = interrupt enabled, resume, IOPL = 0 current process = 0 (iwn0 net80211 taskq) Please excuse my English and many thanks Tim Beikuefner
Hi, I am sorry no one ever looked into this. I cannot access the core.txt.1 anymore (404) so I'll close this for now. Please re-open if you can still reproduce the problem and then please add the attachment here.