syzbot


INFO: task hung in reg_check_chans_work (5)

Status: auto-obsoleted due to no activity on 2024/01/08 12:17
Subsystems: wireless
[Documentation on labels]
First crash: 306d, last: 177d
Similar bugs (9)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 INFO: task hung in reg_check_chans_work 3 43d 88d 0/3 upstream: reported on 2024/01/27 00:47
upstream INFO: task hung in reg_check_chans_work (6) wireless C 8 4d03h 3h03m 0/26 upstream: reported C repro on 2024/04/24 04:32
upstream INFO: task hung in reg_check_chans_work (3) wireless 60 871d 934d 0/26 auto-closed as invalid on 2022/04/03 20:03
linux-4.14 INFO: task hung in reg_check_chans_work 1 716d 716d 0/1 auto-obsoleted due to no activity on 2022/09/05 08:58
upstream INFO: task hung in reg_check_chans_work (4) wireless 4 663d 666d 0/26 auto-closed as invalid on 2022/09/28 14:08
upstream INFO: task hung in reg_check_chans_work net 15 2201d 2260d 0/26 closed as dup on 2018/02/14 15:33
android-44 INFO: task hung in reg_check_chans_work 18 2173d 2247d 0/2 auto-closed as invalid on 2019/02/22 14:50
android-49 INFO: task hung in reg_check_chans_work 18 2172d 2270d 0/3 auto-closed as invalid on 2019/02/22 15:19
upstream INFO: task hung in reg_check_chans_work (2) wireless 3 1295d 1304d 0/26 auto-closed as invalid on 2021/01/04 12:48

Sample crash report:
INFO: task kworker/1:4:5142 blocked for more than 143 seconds.
      Not tainted 6.6.0-rc2-syzkaller-00337-gd90b0276af8f #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:4     state:D stack:25408 pid:5142  ppid:2      flags:0x00004000
Workqueue: events_power_efficient reg_check_chans_work
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5382 [inline]
 __schedule+0xee1/0x5a10 kernel/sched/core.c:6695
 schedule+0xe7/0x1b0 kernel/sched/core.c:6771
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6830
 __mutex_lock_common kernel/locking/mutex.c:679 [inline]
 __mutex_lock+0x969/0x1340 kernel/locking/mutex.c:747
 wiphy_lock include/net/cfg80211.h:5775 [inline]
 reg_leave_invalid_chans net/wireless/reg.c:2450 [inline]
 reg_check_chans_work+0xef/0x1060 net/wireless/reg.c:2465
 process_one_work+0x884/0x15c0 kernel/workqueue.c:2630
 process_scheduled_works kernel/workqueue.c:2703 [inline]
 worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784
 kthread+0x33c/0x440 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
 </TASK>

Showing all locks held in the system:
4 locks held by kworker/0:0/8:
4 locks held by kworker/0:1/9:
3 locks held by kworker/1:1/27:
 #0: ffff88814ac54538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2605
 #1: ffffc90000a2fd80 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2606
 #2: ffffffff8e6025e8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0x12/0x30 net/ipv6/addrconf.c:4667
1 lock held by khungtaskd/29:
 #0: ffffffff8cbab2a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:303 [inline]
 #0: ffffffff8cbab2a0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:749 [inline]
 #0: ffffffff8cbab2a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6613
4 locks held by kworker/u4:2/42:
 #0: ffff888024d86138 ((wq_completion)wg-kex-wg0#5){+.+.}-{0:0}, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2605
 #1: ffffc90000b2fd80 ((work_completion)(&peer->transmit_handshake_work)){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2606
 #2: ffff88802a3e5208 (&wg->static_identity.lock){++++}-{3:3}, at: wg_noise_handshake_create_initiation+0xed/0x650 drivers/net/wireguard/noise.c:529
 #3: ffff88802cb18338 (&handshake->lock){++++}-{3:3}, at: wg_noise_handshake_create_initiation+0x101/0x650 drivers/net/wireguard/noise.c:530
4 locks held by kworker/0:2/54:
3 locks held by kworker/u4:8/2452:
 #0: ffff8880b993c718 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:558
 #1: ffff8880b9928888 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x2d9/0x900 kernel/sched/psi.c:999
 #2: ffff8880b99297d8 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x5d/0x200 kernel/time/timer.c:999
3 locks held by kworker/R-ipv6_/2610:
 #0: ffff88814ac54538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2605
 #1: ffffc9000ad27d10 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2606
 #2: ffffffff8e6025e8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0x12/0x30 net/ipv6/addrconf.c:4667
2 locks held by klogd/4484:
 #0: ffff8880b993c718 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:558
 #1: ffff8880b9928888 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x2d9/0x900 kernel/sched/psi.c:999
7 locks held by kworker/0:3/4786:
2 locks held by getty/4807:
 #0: ffff8880263170a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
 #1: ffffc900031332f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc5/0x1480 drivers/tty/n_tty.c:2206
4 locks held by kworker/0:4/5138:
4 locks held by kworker/0:5/5140:
4 locks held by kworker/0:6/5141:
4 locks held by kworker/1:4/5142:
 #0: ffff888012c72138 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2605
 #1: ffffc9000428fd80 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2606
 #2: ffffffff8e6025e8 (rtnl_mutex){+.+.}-{3:3}, at: reg_check_chans_work+0x7d/0x1060 net/wireless/reg.c:2462
 #3: ffff888030e30768 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: wiphy_lock include/net/cfg80211.h:5775 [inline]
 #3: ffff888030e30768 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: reg_leave_invalid_chans net/wireless/reg.c:2450 [inline]
 #3: ffff888030e30768 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: reg_check_chans_work+0xef/0x1060 net/wireless/reg.c:2465
4 locks held by kworker/0:7/5144:
4 locks held by kworker/0:8/5145:
4 locks held by kworker/0:9/5146:
3 locks held by syz-executor.3/6425:
 #0: ffffffff8e69cd90 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1074
 #1: 
ffff88802f705690
 (nlk_cb_mutex-GENERIC){+.+.}-{3:3}, at: netlink_dump+0xc1/0xca0 net/netlink/af_netlink.c:2213
 #2: ffffffff8e6025e8 (rtnl_mutex){+.+.}-{3:3}, at: nl80211_dump_interface+0xe0/0x6e0 net/wireless/nl80211.c:3964
3 locks held by syz-executor.5/6434:
 #0: ffffffff8e69cd90
 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1074
 #1: ffff88802f704690 (nlk_cb_mutex-GENERIC){+.+.}-{3:3}, at: netlink_dump+0xc1/0xca0 net/netlink/af_netlink.c:2213
 #2: ffffffff8e6025e8 (rtnl_mutex){+.+.}-{3:3}, at: nl80211_prepare_wdev_dump+0x14c/0x740 net/wireless/nl80211.c:1008
3 locks held by kworker/0:11/6466:
3 locks held by kworker/0:15/6504:
2 locks held by syz-executor.3/6508:
 #0: ffffffff8e5ed2d0 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x2d5/0x670 net/core/net_namespace.c:487
 #1: ffffffff8e6025e8 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [inline]
 #1: ffffffff8e6025e8 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x136/0x230 net/smc/smc_pnet.c:878
2 locks held by syz-executor.5/6510:
 #0: ffffffff8e5ed2d0 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x2d5/0x670 net/core/net_namespace.c:487
 #1: ffffffff8e6025e8 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [inline]
 #1: ffffffff8e6025e8 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x136/0x230 net/smc/smc_pnet.c:878

=============================================

NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.6.0-rc2-syzkaller-00337-gd90b0276af8f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x277/0x380 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x299/0x300 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
 watchdog+0xf87/0x1210 kernel/hung_task.c:379
 kthread+0x33c/0x440 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4786 Comm: kworker/0:3 Not tainted 6.6.0-rc2-syzkaller-00337-gd90b0276af8f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023
Workqueue: events cfg80211_wiphy_work
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70 kernel/kcov.c:200
Code: c6 6d 9d 02 66 0f 1f 44 00 00 f3 0f 1e fa 48 8b be b0 01 00 00 e8 b0 ff ff ff 31 c0 c3 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 <f3> 0f 1e fa 65 8b 05 0d f6 7b 7e 89 c1 48 8b 34 24 81 e1 00 01 00
RSP: 0018:ffffc90000006fa0 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffffffff8f45ba44 RCX: ffffffff813a3be4
RDX: ffff88807e975940 RSI: 0000000000000100 RDI: 0000000000000006
RBP: ffffffff8f45ba50 R08: 0000000000000006 R09: ffffffff89b340b2
R10: ffffffff89b340b4 R11: 0200000000000000 R12: ffffffff89b340b2
R13: ffffffff89b340b4 R14: dffffc0000000000 R15: ffffffff8f45ba48
FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f48035a5018 CR3: 000000007552b000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 __orc_find+0xce/0x130 arch/x86/kernel/unwind_orc.c:106
 orc_find arch/x86/kernel/unwind_orc.c:227 [inline]
 unwind_next_frame+0x329/0x2390 arch/x86/kernel/unwind_orc.c:494
 arch_stack_walk+0xfa/0x170 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x96/0xd0 kernel/stacktrace.c:122
 kasan_save_stack+0x33/0x50 mm/kasan/common.c:45
 kasan_set_track+0x25/0x30 mm/kasan/common.c:52
 __kasan_slab_alloc+0x81/0x90 mm/kasan/common.c:328
 kasan_slab_alloc include/linux/kasan.h:188 [inline]
 slab_post_alloc_hook mm/slab.h:762 [inline]
 slab_alloc_node mm/slub.c:3478 [inline]
 slab_alloc mm/slub.c:3486 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3493 [inline]
 kmem_cache_alloc+0x16c/0x3b0 mm/slub.c:3502
 skb_clone+0x171/0x3c0 net/core/skbuff.c:1911
 deliver_clone+0x3f/0xa0 net/bridge/br_forward.c:125
 br_flood+0x493/0x5c0 net/bridge/br_forward.c:245
 br_handle_frame_finish+0xfc6/0x1d80 net/bridge/br_input.c:210
 br_nf_hook_thresh+0x2ff/0x410 net/bridge/br_netfilter_hooks.c:1048
 br_nf_pre_routing_finish_ipv6+0x683/0xf20 net/bridge/br_netfilter_ipv6.c:148
 NF_HOOK include/linux/netfilter.h:304 [inline]
 br_nf_pre_routing_ipv6+0x40e/0x870 net/bridge/br_netfilter_ipv6.c:178
 br_nf_pre_routing+0x80f/0x1540 net/bridge/br_netfilter_hooks.c:508
 nf_hook_entry_hookfn include/linux/netfilter.h:144 [inline]
 nf_hook_bridge_pre net/bridge/br_input.c:272 [inline]
 br_handle_frame+0x9da/0x1700 net/bridge/br_input.c:417
 __netif_receive_skb_core.constprop.0+0xa26/0x3fa0 net/core/dev.c:5417
 __netif_receive_skb_one_core+0xaf/0x180 net/core/dev.c:5521
 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5637
 process_backlog+0x101/0x6b0 net/core/dev.c:5965
 __napi_poll.constprop.0+0xb4/0x530 net/core/dev.c:6527
 napi_poll net/core/dev.c:6594 [inline]
 net_rx_action+0x956/0xe90 net/core/dev.c:6727
 __do_softirq+0x218/0x965 kernel/softirq.c:553
 do_softirq kernel/softirq.c:454 [inline]
 do_softirq+0xaa/0xe0 kernel/softirq.c:441
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0xf8/0x120 kernel/softirq.c:381
 spin_unlock_bh include/linux/spinlock.h:396 [inline]
 cfg80211_put_bss+0x1b4/0x280 net/wireless/scan.c:2959
 ieee80211_rx_bss_put net/mac80211/scan.c:37 [inline]
 ieee80211_rx_bss_put+0x43/0x60 net/mac80211/scan.c:32
 ieee80211_rx_bss_info net/mac80211/ibss.c:1196 [inline]
 ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1613 [inline]
 ieee80211_ibss_rx_queued_mgmt+0x1ad3/0x2ed0 net/mac80211/ibss.c:1642
 ieee80211_iface_process_skb net/mac80211/iface.c:1604 [inline]
 ieee80211_iface_work+0xa1f/0xd40 net/mac80211/iface.c:1658
 cfg80211_wiphy_work+0x24e/0x330 net/wireless/core.c:435
 process_one_work+0x884/0x15c0 kernel/workqueue.c:2630
 process_scheduled_works kernel/workqueue.c:2703 [inline]
 worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784
 kthread+0x33c/0x440 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
 </TASK>

Crashes (26):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/09/23 10:04 upstream d90b0276af8f 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: task hung in reg_check_chans_work
2023/08/11 14:59 upstream 25aa0bebba72 39990d51 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root INFO: task hung in reg_check_chans_work
2023/08/11 04:57 upstream 25aa0bebba72 da3c3ef8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: task hung in reg_check_chans_work
2023/07/09 22:05 upstream c192ac735768 668cb1fa .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: task hung in reg_check_chans_work
2023/07/07 05:24 upstream a452483508d7 22ae5830 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root INFO: task hung in reg_check_chans_work
2023/07/07 03:15 upstream a452483508d7 1a2f6297 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: task hung in reg_check_chans_work
2023/07/06 07:54 upstream 6cd06ab12d1a ba5dba36 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: task hung in reg_check_chans_work
2023/07/03 17:49 upstream a901a3568fd2 6e553898 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: task hung in reg_check_chans_work
2023/07/02 02:08 upstream f8566aa4f176 bfc47836 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: task hung in reg_check_chans_work
2023/07/01 09:06 upstream b25f62ccb490 af3053d2 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: task hung in reg_check_chans_work
2023/08/28 00:10 upstream 85eb043618bb 03d9c195 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 INFO: task hung in reg_check_chans_work
2023/07/22 20:23 upstream 725d444db6b0 27cbe77f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 INFO: task hung in reg_check_chans_work
2023/07/10 18:14 upstream 3f01e9fed845 52ae002a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 INFO: task hung in reg_check_chans_work
2023/07/08 16:32 upstream 8689f4f2ea56 668cb1fa .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 INFO: task hung in reg_check_chans_work
2023/10/29 10:16 net-next 55c900477f5b 3c418d72 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in reg_check_chans_work
2023/09/20 14:17 net-next b3af9c0e89ca 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in reg_check_chans_work
2023/08/10 00:53 net-next b9b05381e5d7 13ca4cd6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in reg_check_chans_work
2023/07/09 00:43 net-next 6843306689af 668cb1fa .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in reg_check_chans_work
2023/07/08 07:07 net-next 6843306689af 668cb1fa .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in reg_check_chans_work
2023/07/07 00:02 net-next 6843306689af 1a2f6297 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in reg_check_chans_work
2023/06/24 19:52 net-next d1d29a42f7ac 09ffe269 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in reg_check_chans_work
2023/08/30 09:11 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 895ed7eb263d ce731e62 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb INFO: task hung in reg_check_chans_work
2023/07/09 17:16 linux-next 123212f53f3e 668cb1fa .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root INFO: task hung in reg_check_chans_work
2023/07/03 21:43 linux-next 296d53d8f84c 6e553898 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root INFO: task hung in reg_check_chans_work
2023/06/22 17:59 linux-next c87d46a9e8eb 09ffe269 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root INFO: task hung in reg_check_chans_work
2023/08/02 20:59 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 2642b8a18760 39a91c18 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 INFO: task hung in reg_check_chans_work
* Struck through repros no longer work on HEAD.