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Date: Wed, 10 Jul 2019 11:51:41 -0700 From: Ben Greear <greearb@...delatech.com> To: netdev <netdev@...r.kernel.org> Subject: lockup in hacked 4.20.17+ kernel, maybe addrconf_verify_work related? Hello, This is with my hacked-upon kernel, could be my mistake, etc. But, curious if anyone else has seen a similar deadlock? I was running a complicated automated wifi test, for what that is worth. 66707.212081] ath: regdomain 0x8348 dynamically updated by user [67044.625948] INFO: task kworker/0:0:27387 blocked for more than 180 seconds. [67044.631831] Tainted: G W O 4.20.17+ #30 [67044.636180] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [67044.647424] kworker/0:0 D 0 27387 2 0x80000080 [67044.647447] Workqueue: ipv6_addrconf addrconf_verify_work [ipv6] [67044.647448] Call Trace: [67044.647455] ? __schedule+0x29e/0x880 [67044.647457] schedule+0x2a/0x80 [67044.647459] schedule_preempt_disabled+0xc/0x20 [67044.647460] __mutex_lock.isra.10+0x2e7/0x4f0 [67044.647468] addrconf_verify_work+0x5/0x10 [ipv6] [67044.647472] process_one_work+0x1f3/0x420 [67044.647473] worker_thread+0x28/0x3c0 [67044.647475] ? process_one_work+0x420/0x420 [67044.647476] kthread+0x10b/0x130 [67044.647478] ? kthread_create_on_node+0x60/0x60 [67044.647480] ret_from_fork+0x1f/0x30 [67044.647491] INFO: task DNS Resolver #6:19810 blocked for more than 180 seconds. [67044.656865] Tainted: G W O 4.20.17+ #30 [67044.661364] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [67044.670861] DNS Resolver #6 D 0 19810 19213 0x00000080 [67044.670863] Call Trace: [67044.670870] ? __schedule+0x29e/0x880 [67044.670872] schedule+0x2a/0x80 [67044.670874] schedule_preempt_disabled+0xc/0x20 [67044.670876] __mutex_lock.isra.10+0x2e7/0x4f0 [67044.670879] ? netlink_lookup+0x111/0x160 [67044.670881] __netlink_dump_start+0x4f/0x1d0 [67044.670883] ? rtnl_xdp_prog_skb+0x60/0x60 [67044.670885] rtnetlink_rcv_msg+0x25c/0x390 [67044.670886] ? rtnl_xdp_prog_skb+0x60/0x60 [67044.670888] ? rtnl_calcit.isra.31+0x110/0x110 [67044.670889] netlink_rcv_skb+0x44/0x120 [67044.670891] netlink_unicast+0x18b/0x220 [67044.670893] netlink_sendmsg+0x1ff/0x3d0 [67044.670896] sock_sendmsg+0x2b/0x40 [67044.670898] __sys_sendto+0xe9/0x150 [67044.670901] ? __audit_syscall_exit+0x216/0x280 [67044.670903] __x64_sys_sendto+0x1f/0x30 [67044.670906] do_syscall_64+0x4a/0xf0 [67044.670909] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [67044.670911] RIP: 0033:0x7f94b119b6b0 [67044.670915] Code: Bad RIP value. [67044.670915] RSP: 002b:00007f94817942e0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c [67044.670917] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f94b119b6b0 [67044.670917] RDX: 0000000000000014 RSI: 00007f9481795420 RDI: 000000000000004d [67044.670918] RBP: 00007f9481795420 R08: 00007f94817953c4 R09: 000000000000000c [67044.670919] R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000014 [67044.670919] R13: 00007f94817953c4 R14: 00007f947ff42208 R15: 000000000000004d [67044.670933] INFO: task kworker/0:2:17500 blocked for more than 180 seconds. [67044.678868] Tainted: G W O 4.20.17+ #30 [67044.685860] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [67044.692746] kworker/0:2 D 0 17500 2 0x80000080 [67044.692787] Workqueue: events_power_efficient reg_check_chans_work [cfg80211] [67044.692788] Call Trace: [67044.692795] ? __schedule+0x29e/0x880 [67044.692797] schedule+0x2a/0x80 [67044.692799] schedule_preempt_disabled+0xc/0x20 [67044.692800] __mutex_lock.isra.10+0x2e7/0x4f0 [67044.692810] reg_check_chans_work+0x28/0x350 [cfg80211] [67044.692815] process_one_work+0x1f3/0x420 [67044.692817] worker_thread+0x28/0x3c0 [67044.692819] ? process_one_work+0x420/0x420 [67044.692821] kthread+0x10b/0x130 [67044.692822] ? kthread_create_on_node+0x60/0x60 [67044.692825] ret_from_fork+0x1f/0x30 [67044.692833] INFO: task iw:1488 blocked for more than 180 seconds. [67044.700860] Tainted: G W O 4.20.17+ #30 [67044.705216] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [67044.714862] iw D 0 1488 1487 0x00000080 [67044.714864] Call Trace: [67044.714871] ? __schedule+0x29e/0x880 [67044.714874] schedule+0x2a/0x80 [67044.714876] schedule_preempt_disabled+0xc/0x20 [67044.714877] __mutex_lock.isra.10+0x2e7/0x4f0 [67044.714915] nl80211_dump_wiphy+0x1d/0x1b0 [cfg80211] [67044.714919] genl_lock_dumpit+0x23/0x40 [67044.714921] netlink_dump+0x16d/0x360 [67044.714923] __netlink_dump_start+0x168/0x1d0 [67044.714925] genl_family_rcv_msg+0x25f/0x3a0 [67044.714927] ? genl_lock_dumpit+0x40/0x40 [67044.714928] ? genl_lock_done+0x40/0x40 [67044.714929] ? genl_unlock+0x10/0x10 [67044.714931] ? netlink_unicast+0x1ff/0x220 [67044.714932] genl_rcv_msg+0x42/0x87 [67044.714934] ? genl_family_rcv_msg+0x3a0/0x3a0 [67044.714935] netlink_rcv_skb+0x44/0x120 [67044.714937] genl_rcv+0x1f/0x30 [67044.714939] netlink_unicast+0x18b/0x220 [67044.714940] netlink_sendmsg+0x1ff/0x3d0 [67044.714944] sock_sendmsg+0x2b/0x40 [67044.714946] ___sys_sendmsg+0x28a/0x2f0 [67044.714947] ? ___sys_recvmsg+0x156/0x1d0 [67044.714950] ? __alloc_pages_nodemask+0x111/0x280 [67044.714954] ? alloc_pages_vma+0x6f/0x1c0 [67044.714957] ? page_add_new_anon_rmap+0x72/0xb0 [67044.714958] ? __handle_mm_fault+0x7db/0x12c0 [67044.714961] __sys_sendmsg+0x52/0xa0 [67044.714964] do_syscall_64+0x4a/0xf0 [67044.714967] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [67044.714969] RIP: 0033:0x7fa9c4af15a7 [67044.714972] Code: Bad RIP value. [67044.714973] RSP: 002b:00007fffdd7ac818 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [67044.714974] RAX: ffffffffffffffda RBX: 00000000021ae990 RCX: 00007fa9c4af15a7 [67044.714975] RDX: 0000000000000000 RSI: 00007fffdd7ac8b0 RDI: 0000000000000008 [67044.714976] RBP: 00000000021b3d80 R08: 0000000000000004 R09: 00007fa9c4dabf20 [67044.714976] R10: 0000000000000170 R11: 0000000000000246 R12: 00000000021b3ec0 [67044.714977] R13: 00007fffdd7ac8b0 R14: 00000000021b3ec0 R15: 00007fffdd7acb18 [67044.714980] INFO: task sshd:1763 blocked for more than 180 seconds. [67044.720810] Tainted: G W O 4.20.17+ #30 [67044.725186] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [67044.732027] sshd D 0 1763 1355 0x00000080 [67044.732029] Call Trace: [67044.732038] ? __schedule+0x29e/0x880 [67044.732040] schedule+0x2a/0x80 [67044.732042] schedule_preempt_disabled+0xc/0x20 [67044.732043] __mutex_lock.isra.10+0x2e7/0x4f0 [67044.732046] ? netlink_lookup+0x111/0x160 [67044.732048] __netlink_dump_start+0x4f/0x1d0 [67044.732051] ? rtnl_xdp_prog_skb+0x60/0x60 [67044.732052] rtnetlink_rcv_msg+0x25c/0x390 [67044.732054] ? rtnl_xdp_prog_skb+0x60/0x60 [67044.732055] ? rtnl_calcit.isra.31+0x110/0x110 [67044.732057] netlink_rcv_skb+0x44/0x120 [67044.732059] netlink_unicast+0x18b/0x220 [67044.732060] netlink_sendmsg+0x1ff/0x3d0 [67044.732064] sock_sendmsg+0x2b/0x40 [67044.732066] __sys_sendto+0xe9/0x150 [67044.732070] ? __audit_syscall_exit+0x216/0x280 [67044.732071] __x64_sys_sendto+0x1f/0x30 [67044.732075] do_syscall_64+0x4a/0xf0 [67044.732077] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [67044.732079] RIP: 0033:0x7f16e29c765a [67044.732082] Code: Bad RIP value. [67044.732083] RSP: 002b:00007ffe57e52e88 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [67044.732084] RAX: ffffffffffffffda RBX: 00007ffe57e53f80 RCX: 00007f16e29c765a [67044.732085] RDX: 0000000000000014 RSI: 00007ffe57e53f80 RDI: 0000000000000003 [67044.732085] RBP: 00007ffe57e53fd0 R08: 00007ffe57e53f24 R09: 000000000000000c [67044.732086] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe57e53f24 [67044.732087] R13: 00007ffe57e54160 R14: 0000000000000000 R15: 0000000000000003 Thanks, Ben -- Ben Greear <greearb@...delatech.com> Candela Technologies Inc http://www.candelatech.com
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