syzbot


INFO: task hung in ieee80211_ibss_rx_queued_mgmt

Status: auto-closed as invalid on 2021/12/20 22:40
Reported-by: syzbot+241f947b2e4bc0849985@syzkaller.appspotmail.com
First crash: 978d, last: 978d

Sample crash report:
ieee802154 phy1 wpan1: encryption failed: -22
ieee802154 phy0 wpan0: encryption failed: -22
ieee802154 phy1 wpan1: encryption failed: -22
ieee802154 phy0 wpan0: encryption failed: -22
ieee802154 phy1 wpan1: encryption failed: -22
INFO: task kworker/u4:3:2844 blocked for more than 140 seconds.
      Not tainted 4.19.204-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kworker/u4:3    D25256  2844      2 0x80000000
Workqueue: phy12 ieee80211_iface_work
Call Trace:
 context_switch kernel/sched/core.c:2828 [inline]
 __schedule+0x887/0x2040 kernel/sched/core.c:3517
 schedule+0x8d/0x1b0 kernel/sched/core.c:3561
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3619
 __mutex_lock_common kernel/locking/mutex.c:1015 [inline]
 __mutex_lock+0x604/0x1200 kernel/locking/mutex.c:1083
 sdata_lock net/mac80211/ieee80211_i.h:977 [inline]
 ieee80211_ibss_rx_queued_mgmt+0xe9/0x18b0 net/mac80211/ibss.c:1623
 ieee80211_iface_work+0x5c4/0x8a0 net/mac80211/iface.c:1341
 process_one_work+0x864/0x1570 kernel/workqueue.c:2153
 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296
 kthread+0x33f/0x460 kernel/kthread.c:259
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
INFO: task kworker/1:3:4699 blocked for more than 140 seconds.
      Not tainted 4.19.204-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kworker/1:3     D26040  4699      2 0x80000000
Workqueue: events linkwatch_event
Call Trace:
 context_switch kernel/sched/core.c:2828 [inline]
 __schedule+0x887/0x2040 kernel/sched/core.c:3517
 schedule+0x8d/0x1b0 kernel/sched/core.c:3561
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3619
 __mutex_lock_common kernel/locking/mutex.c:1015 [inline]
 __mutex_lock+0x604/0x1200 kernel/locking/mutex.c:1083
 linkwatch_event+0xb/0x60 net/core/link_watch.c:236
 process_one_work+0x864/0x1570 kernel/workqueue.c:2153
 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296
 kthread+0x33f/0x460 kernel/kthread.c:259
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
INFO: task kworker/0:4:9330 blocked for more than 140 seconds.
      Not tainted 4.19.204-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kworker/0:4     D25264  9330      2 0x80000000
Workqueue: events rfkill_global_led_trigger_worker
Call Trace:
 context_switch kernel/sched/core.c:2828 [inline]
 __schedule+0x887/0x2040 kernel/sched/core.c:3517
 schedule+0x8d/0x1b0 kernel/sched/core.c:3561
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3619
 __mutex_lock_common kernel/locking/mutex.c:1015 [inline]
 __mutex_lock+0x604/0x1200 kernel/locking/mutex.c:1083
 rfkill_global_led_trigger_worker+0x17/0x110 net/rfkill/core.c:191
 process_one_work+0x864/0x1570 kernel/workqueue.c:2153
 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296
 kthread+0x33f/0x460 kernel/kthread.c:259
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
INFO: task syz-executor.4:9869 blocked for more than 140 seconds.
      Not tainted 4.19.204-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.4  D25872  9869   8114 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2828 [inline]
 __schedule+0x887/0x2040 kernel/sched/core.c:3517
 schedule+0x8d/0x1b0 kernel/sched/core.c:3561
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3619
 __mutex_lock_common kernel/locking/mutex.c:1015 [inline]
 __mutex_lock+0x604/0x1200 kernel/locking/mutex.c:1083
 rfkill_fop_open+0x10d/0x6d0 net/rfkill/core.c:1129
 misc_open+0x372/0x4a0 drivers/char/misc.c:141
 chrdev_open+0x266/0x770 fs/char_dev.c:423
 do_dentry_open+0x4aa/0x1160 fs/open.c:796
 do_last fs/namei.c:3421 [inline]
 path_openat+0x793/0x2df0 fs/namei.c:3537
 do_filp_open+0x18c/0x3f0 fs/namei.c:3567
 do_sys_open+0x3b3/0x520 fs/open.c:1085
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4665e9
Code: Bad RIP value.
RSP: 002b:00007fe29f9f6188 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 000000000056c038 RCX: 00000000004665e9
RDX: 0000000000000002 RSI: 0000000020000000 RDI: ffffffffffffff9c
RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c038
R13: 00007fff117a1a4f R14: 00007fe29f9f6300 R15: 0000000000022000
INFO: task syz-executor.4:9882 blocked for more than 140 seconds.
      Not tainted 4.19.204-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.4  D26592  9882   8114 0x00000006
Call Trace:
 context_switch kernel/sched/core.c:2828 [inline]
 __schedule+0x887/0x2040 kernel/sched/core.c:3517
 schedule+0x8d/0x1b0 kernel/sched/core.c:3561
 exp_funnel_lock kernel/rcu/tree_exp.h:320 [inline]
 _synchronize_rcu_expedited+0x60c/0x6f0 kernel/rcu/tree_exp.h:667
 synchronize_net+0x37/0x50 net/core/dev.c:9279
 __sta_info_flush+0x389/0x540 net/mac80211/sta_info.c:1151
 sta_info_flush net/mac80211/sta_info.h:773 [inline]
 ieee80211_ibss_disconnect+0x104/0xe40 net/mac80211/ibss.c:711
 ieee80211_ibss_leave+0x12/0x150 net/mac80211/ibss.c:1858
 rdev_leave_ibss net/wireless/rdev-ops.h:531 [inline]
 __cfg80211_leave_ibss+0x191/0x7c0 net/wireless/ibss.c:206
 __cfg80211_leave+0x318/0x430 net/wireless/core.c:1079
 cfg80211_leave net/wireless/core.c:1130 [inline]
 cfg80211_netdev_notifier_call+0xcb0/0x1aa0 net/wireless/core.c:1229
 notifier_call_chain+0xc0/0x230 kernel/notifier.c:93
 call_netdevice_notifiers net/core/dev.c:1762 [inline]
 __dev_close_many+0xee/0x2e0 net/core/dev.c:1459
 dev_close_many+0x24a/0x670 net/core/dev.c:1510
 dev_close net/core/dev.c:1536 [inline]
 dev_close+0x179/0x220 net/core/dev.c:1530
 cfg80211_shutdown_all_interfaces+0x12d/0x1d0 net/wireless/core.c:257
 cfg80211_rfkill_set_block net/wireless/core.c:283 [inline]
 cfg80211_rfkill_set_block+0x2f/0x40 net/wireless/core.c:275
 rfkill_set_block+0x1f9/0x540 net/rfkill/core.c:353
 rfkill_fop_write+0x250/0x4a0 net/rfkill/core.c:1249
 __vfs_write+0xf7/0x770 fs/read_write.c:485
 vfs_write+0x1f3/0x540 fs/read_write.c:549
 ksys_write+0x12b/0x2a0 fs/read_write.c:599
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4665e9
Code: Bad RIP value.
RSP: 002b:00007fe29f9d5188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 000000000056c0f0 RCX: 00000000004665e9
RDX: 0000000000000008 RSI: 0000000020000040 RDI: 0000000000000007
RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c0f0
R13: 00007fff117a1a4f R14: 00007fe29f9d5300 R15: 0000000000022000
INFO: task syz-executor.0:9983 blocked for more than 140 seconds.
      Not tainted 4.19.204-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.0  D27408  9983   8106 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2828 [inline]
 __schedule+0x887/0x2040 kernel/sched/core.c:3517
 schedule+0x8d/0x1b0 kernel/sched/core.c:3561
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3619
 __mutex_lock_common kernel/locking/mutex.c:1015 [inline]
 __mutex_lock+0x604/0x1200 kernel/locking/mutex.c:1083
 cangw_pernet_exit+0xe/0x20 net/can/gw.c:1032
 ops_exit_list+0xa5/0x150 net/core/net_namespace.c:153
 setup_net+0x3d1/0x720 net/core/net_namespace.c:332
 copy_net_ns+0x1f7/0x340 net/core/net_namespace.c:438
 create_new_namespaces+0x3f6/0x7b0 kernel/nsproxy.c:107
 unshare_nsproxy_namespaces+0xbd/0x1f0 kernel/nsproxy.c:206
 ksys_unshare+0x36c/0x9a0 kernel/fork.c:2541
 __do_sys_unshare kernel/fork.c:2609 [inline]
 __se_sys_unshare kernel/fork.c:2607 [inline]
 __x64_sys_unshare+0x2d/0x40 kernel/fork.c:2607
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4665e9
Code: Bad RIP value.
RSP: 002b:00007f5b59e24188 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000000
RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007fff60a745cf R14: 00007f5b59e24300 R15: 0000000000022000
INFO: task syz-executor.0:9988 blocked for more than 140 seconds.
      Not tainted 4.19.204-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.0  D27696  9988   8106 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2828 [inline]
 __schedule+0x887/0x2040 kernel/sched/core.c:3517
 schedule+0x8d/0x1b0 kernel/sched/core.c:3561
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3619
 __mutex_lock_common kernel/locking/mutex.c:1015 [inline]
 __mutex_lock+0x604/0x1200 kernel/locking/mutex.c:1083
 tc_action_net_exit include/net/act_api.h:135 [inline]
 tunnel_key_exit_net+0x22/0x360 net/sched/act_tunnel_key.c:591
 ops_exit_list+0xf9/0x150 net/core/net_namespace.c:156
 setup_net+0x3d1/0x720 net/core/net_namespace.c:332
 copy_net_ns+0x1f7/0x340 net/core/net_namespace.c:438
 create_new_namespaces+0x3f6/0x7b0 kernel/nsproxy.c:107
 unshare_nsproxy_namespaces+0xbd/0x1f0 kernel/nsproxy.c:206
 ksys_unshare+0x36c/0x9a0 kernel/fork.c:2541
 __do_sys_unshare kernel/fork.c:2609 [inline]
 __se_sys_unshare kernel/fork.c:2607 [inline]
 __x64_sys_unshare+0x2d/0x40 kernel/fork.c:2607
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4665e9
Code: Bad RIP value.
RSP: 002b:00007f5b59e03188 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 000000000056c038 RCX: 00000000004665e9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000000
RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c038
R13: 00007fff60a745cf R14: 00007f5b59e03300 R15: 0000000000022000
INFO: task syz-executor.1:9989 blocked for more than 140 seconds.
      Not tainted 4.19.204-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.1  D28352  9989   8108 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2828 [inline]
 __schedule+0x887/0x2040 kernel/sched/core.c:3517
 schedule+0x8d/0x1b0 kernel/sched/core.c:3561
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3619
 __mutex_lock_common kernel/locking/mutex.c:1015 [inline]
 __mutex_lock+0x604/0x1200 kernel/locking/mutex.c:1083
 misc_open+0x55/0x4a0 drivers/char/misc.c:107
 chrdev_open+0x266/0x770 fs/char_dev.c:423
 do_dentry_open+0x4aa/0x1160 fs/open.c:796
 do_last fs/namei.c:3421 [inline]
 path_openat+0x793/0x2df0 fs/namei.c:3537
 do_filp_open+0x18c/0x3f0 fs/namei.c:3567
 do_sys_open+0x3b3/0x520 fs/open.c:1085
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4665e9
Code: Bad RIP value.
RSP: 002b:00007fad8ad72188 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9
RDX: 0000000000000042 RSI: 0000000020000000 RDI: ffffffffffffff9c
RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007ffcfa1d8eaf R14: 00007fad8ad72300 R15: 0000000000022000
INFO: task syz-executor.1:9995 blocked for more than 140 seconds.
      Not tainted 4.19.204-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.1  D28312  9995   8108 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2828 [inline]
 __schedule+0x887/0x2040 kernel/sched/core.c:3517
 schedule+0x8d/0x1b0 kernel/sched/core.c:3561
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3619
 __mutex_lock_common kernel/locking/mutex.c:1015 [inline]
 __mutex_lock+0x604/0x1200 kernel/locking/mutex.c:1083
 misc_open+0x55/0x4a0 drivers/char/misc.c:107
 chrdev_open+0x266/0x770 fs/char_dev.c:423
 do_dentry_open+0x4aa/0x1160 fs/open.c:796
 do_last fs/namei.c:3421 [inline]
 path_openat+0x793/0x2df0 fs/namei.c:3537
 do_filp_open+0x18c/0x3f0 fs/namei.c:3567
 do_sys_open+0x3b3/0x520 fs/open.c:1085
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4665e9
Code: Bad RIP value.
RSP: 002b:00007fad8ad51188 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 000000000056c038 RCX: 00000000004665e9
RDX: 0000000000000042 RSI: 0000000020000000 RDI: ffffffffffffff9c
RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c038
R13: 00007ffcfa1d8eaf R14: 00007fad8ad51300 R15: 0000000000022000

Showing all locks held in the system:
2 locks held by kworker/u4:1/23:
 #0: 000000009f2525ef (&rq->lock){-.-.}, at: idle_balance kernel/sched/fair.c:9702 [inline]
 #0: 000000009f2525ef (&rq->lock){-.-.}, at: pick_next_task_fair+0x556/0x1570 kernel/sched/fair.c:6841
 #1: 0000000058540106 (rcu_read_lock){....}, at: cpu_of kernel/sched/sched.h:921 [inline]
 #1: 0000000058540106 (rcu_read_lock){....}, at: __update_idle_core+0x39/0x3e0 kernel/sched/fair.c:6057
1 lock held by khungtaskd/1569:
 #0: 0000000058540106 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441
3 locks held by kworker/u4:3/2844:
 #0: 0000000094b54e06 ((wq_completion)"%s"wiphy_name(local->hw.wiphy)){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124
 #1: 00000000f5cbff49 ((work_completion)(&sdata->work)){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128
 #2: 000000000682bbb3 (&wdev->mtx){+.+.}, at: sdata_lock net/mac80211/ieee80211_i.h:977 [inline]
 #2: 000000000682bbb3 (&wdev->mtx){+.+.}, at: ieee80211_ibss_rx_queued_mgmt+0xe9/0x18b0 net/mac80211/ibss.c:1623
3 locks held by kworker/0:2/3386:
 #0: 000000009876bcd6 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124
 #1: 00000000cbf867ff ((addr_chk_work).work){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128
 #2: 000000003130ec0e (rtnl_mutex){+.+.}, at: addrconf_verify_work+0xa/0x20 net/ipv6/addrconf.c:4476
3 locks held by kworker/1:3/4699:
 #0: 000000009ddb1c7b ((wq_completion)"events"){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124
 #1: 00000000f2fd0743 ((linkwatch_work).work){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128
 #2: 000000003130ec0e (rtnl_mutex){+.+.}, at: linkwatch_event+0xb/0x60 net/core/link_watch.c:236
2 locks held by in:imklog/7800:
 #0: 00000000599b99fa (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767
 #1: 00000000bd9384af (logbuf_lock){-...}, at: is_bpf_text_address+0x0/0x1b0 kernel/bpf/core.c:532
3 locks held by syz-fuzzer/8081:
 #0: 00000000f31b307e (&rq->lock){-.-.}, at: rq_lock kernel/sched/sched.h:1824 [inline]
 #0: 00000000f31b307e (&rq->lock){-.-.}, at: __schedule+0x1f9/0x2040 kernel/sched/core.c:3455
 #1: 0000000058540106 (rcu_read_lock){....}, at: trace_sched_stat_runtime include/trace/events/sched.h:428 [inline]
 #1: 0000000058540106 (rcu_read_lock){....}, at: update_curr+0x2c3/0x870 kernel/sched/fair.c:857
 #2: 000000001e8e973d (&(ptlock_ptr(page))->rlock#2){+.+.}, at: spin_lock include/linux/spinlock.h:329 [inline]
 #2: 000000001e8e973d (&(ptlock_ptr(page))->rlock#2){+.+.}, at: map_pte mm/page_vma_mapped.c:51 [inline]
 #2: 000000001e8e973d (&(ptlock_ptr(page))->rlock#2){+.+.}, at: page_vma_mapped_walk+0x1172/0x27d0 mm/page_vma_mapped.c:254
3 locks held by kworker/0:3/9130:
 #0: 00000000a322acd4 ((wq_completion)"events_power_efficient"){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124
 #1: 000000008ff53eb3 ((check_lifetime_work).work){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128
 #2: 000000003130ec0e (rtnl_mutex){+.+.}, at: check_lifetime+0x485/0x870 net/ipv4/devinet.c:716
3 locks held by kworker/0:4/9330:
 #0: 000000009ddb1c7b ((wq_completion)"events"){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124
 #1: 00000000d4b6b4a2 ((work_completion)(&rfkill_global_led_trigger_work)){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128
 #2: 00000000277b201f (rfkill_global_mutex){+.+.}, at: rfkill_global_led_trigger_worker+0x17/0x110 net/rfkill/core.c:191
2 locks held by syz-executor.4/9869:
 #0: 0000000068c1d969 (misc_mtx){+.+.}, at: misc_open+0x55/0x4a0 drivers/char/misc.c:107
 #1: 00000000277b201f (rfkill_global_mutex){+.+.}, at: rfkill_fop_open+0x10d/0x6d0 net/rfkill/core.c:1129
4 locks held by syz-executor.4/9882:
 #0: 00000000277b201f (rfkill_global_mutex){+.+.}, at: rfkill_fop_write+0xfe/0x4a0 net/rfkill/core.c:1241
 #1: 000000003130ec0e (rtnl_mutex){+.+.}, at: cfg80211_rfkill_set_block net/wireless/core.c:282 [inline]
 #1: 000000003130ec0e (rtnl_mutex){+.+.}, at: cfg80211_rfkill_set_block+0x23/0x40 net/wireless/core.c:275
 #2: 000000000682bbb3 (&wdev->mtx){+.+.}, at: wdev_lock net/wireless/core.h:193 [inline]
 #2: 000000000682bbb3 (&wdev->mtx){+.+.}, at: cfg80211_leave net/wireless/core.c:1129 [inline]
 #2: 000000000682bbb3 (&wdev->mtx){+.+.}, at: cfg80211_netdev_notifier_call+0xca3/0x1aa0 net/wireless/core.c:1229
 #3: 00000000bccc5f2d (&local->sta_mtx){+.+.}, at: __sta_info_flush+0x166/0x540 net/mac80211/sta_info.c:1140
2 locks held by syz-executor.0/9983:
 #0: 0000000094cf5911 (pernet_ops_rwsem){++++}, at: copy_net_ns+0x1d8/0x340 net/core/net_namespace.c:434
 #1: 000000003130ec0e (rtnl_mutex){+.+.}, at: cangw_pernet_exit+0xe/0x20 net/can/gw.c:1032
2 locks held by syz-executor.0/9988:
 #0: 0000000094cf5911 (pernet_ops_rwsem){++++}, at: copy_net_ns+0x1d8/0x340 net/core/net_namespace.c:434
 #1: 000000003130ec0e (rtnl_mutex){+.+.}, at: tc_action_net_exit include/net/act_api.h:135 [inline]
 #1: 000000003130ec0e (rtnl_mutex){+.+.}, at: tunnel_key_exit_net+0x22/0x360 net/sched/act_tunnel_key.c:591
1 lock held by syz-executor.1/9989:
 #0: 0000000068c1d969 (misc_mtx){+.+.}, at: misc_open+0x55/0x4a0 drivers/char/misc.c:107
1 lock held by syz-executor.1/9995:
 #0: 0000000068c1d969 (misc_mtx){+.+.}, at: misc_open+0x55/0x4a0 drivers/char/misc.c:107

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

NMI backtrace for cpu 0
CPU: 0 PID: 1569 Comm: khungtaskd Not tainted 4.19.204-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline]
 watchdog+0x991/0xe60 kernel/hung_task.c:287
 kthread+0x33f/0x460 kernel/kthread.c:259
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 23 Comm: kworker/u4:1 Not tainted 4.19.204-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
RIP: 0010:__sanitizer_cov_trace_pc+0x22/0x50 kernel/kcov.c:101
Code: 90 90 90 90 90 90 90 90 48 8b 34 24 65 48 8b 04 25 80 df 01 00 65 8b 15 6c 4c 9f 7e 81 e2 00 01 1f 00 75 2b 8b 90 60 13 00 00 <83> fa 02 75 20 48 8b 88 68 13 00 00 8b 80 64 13 00 00 48 8b 11 48
RSP: 0018:ffff8880b5047c50 EFLAGS: 00000246
RAX: ffff8880b503c600 RBX: 0000000000000000 RCX: ffffffff87d8baed
RDX: 0000000000000000 RSI: ffffffff83771f55 RDI: ffffffff88b3e020
RBP: ffffffff88b3e020 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000
R13: ffffffff88b3dfe0 R14: 000000000000014b R15: ffff8880a4b5bc00
FS:  0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f45d54d8000 CR3: 00000000b3799000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 check_preemption_disabled+0x15/0x280 lib/smp_processor_id.c:13
 rcu_dynticks_curr_cpu_in_eqs kernel/rcu/tree.c:348 [inline]
 rcu_is_watching+0x12/0xc0 kernel/rcu/tree.c:1025
 rcu_read_unlock include/linux/rcupdate.h:677 [inline]
 batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:423 [inline]
 batadv_nc_worker+0x936/0xd50 net/batman-adv/network-coding.c:730
 process_one_work+0x864/0x1570 kernel/workqueue.c:2153
 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296
 kthread+0x33f/0x460 kernel/kthread.c:259
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
----------------
Code disassembly (best guess):
   0:	90                   	nop
   1:	90                   	nop
   2:	90                   	nop
   3:	90                   	nop
   4:	90                   	nop
   5:	90                   	nop
   6:	90                   	nop
   7:	90                   	nop
   8:	48 8b 34 24          	mov    (%rsp),%rsi
   c:	65 48 8b 04 25 80 df 	mov    %gs:0x1df80,%rax
  13:	01 00
  15:	65 8b 15 6c 4c 9f 7e 	mov    %gs:0x7e9f4c6c(%rip),%edx        # 0x7e9f4c88
  1c:	81 e2 00 01 1f 00    	and    $0x1f0100,%edx
  22:	75 2b                	jne    0x4f
  24:	8b 90 60 13 00 00    	mov    0x1360(%rax),%edx
* 2a:	83 fa 02             	cmp    $0x2,%edx <-- trapping instruction
  2d:	75 20                	jne    0x4f
  2f:	48 8b 88 68 13 00 00 	mov    0x1368(%rax),%rcx
  36:	8b 80 64 13 00 00    	mov    0x1364(%rax),%eax
  3c:	48 8b 11             	mov    (%rcx),%rdx
  3f:	48                   	rex.W

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2021/08/22 22:39 linux-4.19.y 59456c9cc40c b599f2fc .config console log report info ci2-linux-4-19 INFO: task hung in ieee80211_ibss_rx_queued_mgmt
* Struck through repros no longer work on HEAD.