Killed process 25907 (syz-executor.5) total-vm:72580kB, anon-rss:96kB, file-rss:34816kB, shmem-rss:0kB oom_reaper: reaped process 25907 (syz-executor.5), now anon-rss:0kB, file-rss:33856kB, shmem-rss:0kB ip6_tunnel: ip6tnl2 xmit: Local address not yet configured! INFO: task syz-executor.0:25890 blocked for more than 140 seconds. Not tainted 4.19.66 #40 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kobject: 'phy2717' (00000000efaae51c): kobject_uevent_env syz-executor.0 D29496 25890 23348 0x00000004 kobject: 'phy2717' (00000000efaae51c): fill_kobj_path: path = '/devices/virtual/mac80211_hwsim/hwsim2717/ieee80211/phy2717' Call Trace: kobject: 'ieee80211' (0000000071124b06): kobject_cleanup, parent (null) context_switch kernel/sched/core.c:2826 [inline] __schedule+0x866/0x1dc0 kernel/sched/core.c:3474 kobject: 'ieee80211' (0000000071124b06): calling ktype release kobject: 'ieee80211': free name kobject: 'hwsim2717' (000000009172b86a): kobject_uevent_env kobject: 'hwsim2717' (000000009172b86a): fill_kobj_path: path = '/devices/virtual/mac80211_hwsim/hwsim2717' kobject: 'hwsim2717' (000000009172b86a): kobject_uevent_env kobject: 'hwsim2717' (000000009172b86a): fill_kobj_path: path = '/devices/virtual/mac80211_hwsim/hwsim2717' schedule+0x92/0x1c0 kernel/sched/core.c:3518 kobject: 'hwsim2717' (000000009172b86a): kobject_cleanup, parent (null) __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:589 [inline] rwsem_down_write_failed+0x774/0xc30 kernel/locking/rwsem-xadd.c:618 kobject: 'hwsim2717' (000000009172b86a): calling ktype release kobject: 'hwsim2717': free name kobject: 'phy2717' (00000000efaae51c): kobject_cleanup, parent (null) kobject: 'phy2717' (00000000efaae51c): calling ktype release call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117 kobject: 'rfkill2726' (000000009405fd5f): kobject_cleanup, parent (null) kobject: 'rfkill2726' (000000009405fd5f): calling ktype release __down_write arch/x86/include/asm/rwsem.h:142 [inline] down_write+0x53/0x90 kernel/locking/rwsem.c:72 kobject: 'rfkill2726': free name kobject: 'phy2717': free name register_netdevice_notifier+0x7e/0x630 net/core/dev.c:1642 bcm_init+0x1a8/0x220 net/can/bcm.c:1502 can_create+0x288/0x4a0 net/can/af_can.c:184 __sock_create+0x3d8/0x730 net/socket.c:1276 sock_create net/socket.c:1316 [inline] __sys_socket+0x103/0x220 net/socket.c:1346 __do_sys_socket net/socket.c:1355 [inline] __se_sys_socket net/socket.c:1353 [inline] __x64_sys_socket+0x73/0xb0 net/socket.c:1353 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459829 Code: Bad RIP value. RSP: 002b:00007f0e314f8c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459829 RDX: 0000000000000002 RSI: 0000000000000002 RDI: 000000000000001d RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f0e314f96d4 R13: 00000000004c846b R14: 00000000004defe0 R15: 00000000ffffffff INFO: task syz-executor.0:25892 blocked for more than 140 seconds. Not tainted 4.19.66 #40 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D29496 25892 23348 0x00000004 Call Trace: context_switch kernel/sched/core.c:2826 [inline] __schedule+0x866/0x1dc0 kernel/sched/core.c:3474 schedule+0x92/0x1c0 kernel/sched/core.c:3518 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:589 [inline] rwsem_down_write_failed+0x774/0xc30 kernel/locking/rwsem-xadd.c:618 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117 __down_write arch/x86/include/asm/rwsem.h:142 [inline] down_write+0x53/0x90 kernel/locking/rwsem.c:72 register_netdevice_notifier+0x7e/0x630 net/core/dev.c:1642 bcm_init+0x1a8/0x220 net/can/bcm.c:1502 can_create+0x288/0x4a0 net/can/af_can.c:184 __sock_create+0x3d8/0x730 net/socket.c:1276 sock_create net/socket.c:1316 [inline] __sys_socket+0x103/0x220 net/socket.c:1346 __do_sys_socket net/socket.c:1355 [inline] __se_sys_socket net/socket.c:1353 [inline] __x64_sys_socket+0x73/0xb0 net/socket.c:1353 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459829 Code: Bad RIP value. RSP: 002b:00007f0e314d7c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459829 RDX: 0000000000000002 RSI: 0000000000000002 RDI: 000000000000001d RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f0e314d86d4 R13: 00000000004c846b R14: 00000000004defe0 R15: 00000000ffffffff Showing all locks held in the system: 1 lock held by khungtaskd/1037: #0: 000000001151b336 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e kernel/locking/lockdep.c:4435 2 locks held by getty/7785: #0: 000000004cf67fd4 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:363 #1: 00000000465962a0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/7786: #0: 00000000ebfdb24d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:363 #1: 000000000d92fb2a (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/7787: #0: 00000000f8ab536a (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:363 #1: 000000006f948c28 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/7788: #0: 0000000017c05c99 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:363 #1: 0000000072ddf6e6 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/7789: #0: 0000000099387532 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:363 #1: 000000002de0716a (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/7790: #0: 000000001cca81af (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:363 #1: 000000000e966711 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/7791: #0: 00000000348391e8 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:363 #1: 000000008211f091 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 5 locks held by kworker/u4:8/26219: #0: 00000000ef0e89d1 ((wq_completion)"%s""netns"){+.+.}, at: __write_once_size include/linux/compiler.h:220 [inline] #0: 00000000ef0e89d1 ((wq_completion)"%s""netns"){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 00000000ef0e89d1 ((wq_completion)"%s""netns"){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:40 [inline] #0: 00000000ef0e89d1 ((wq_completion)"%s""netns"){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:59 [inline] #0: 00000000ef0e89d1 ((wq_completion)"%s""netns"){+.+.}, at: set_work_data kernel/workqueue.c:617 [inline] #0: 00000000ef0e89d1 ((wq_completion)"%s""netns"){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline] #0: 00000000ef0e89d1 ((wq_completion)"%s""netns"){+.+.}, at: process_one_work+0x87e/0x1750 kernel/workqueue.c:2124 #1: 000000001ad0b3bb (net_cleanup_work){+.+.}, at: process_one_work+0x8b4/0x1750 kernel/workqueue.c:2128 #2: 0000000004506659 (pernet_ops_rwsem){++++}, at: cleanup_net+0xae/0x960 net/core/net_namespace.c:519 #3: 000000005d965d32 (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77 #4: 000000004026a778 (rcu_preempt_state.exp_mutex){+.+.}, at: exp_funnel_lock kernel/rcu/tree_exp.h:297 [inline] #4: 000000004026a778 (rcu_preempt_state.exp_mutex){+.+.}, at: _synchronize_rcu_expedited+0x59e/0x7f0 kernel/rcu/tree_exp.h:667 2 locks held by kworker/0:4/17766: #0: 000000005a77927a ((wq_completion)"rcu_gp"){+.+.}, at: __write_once_size include/linux/compiler.h:220 [inline] #0: 000000005a77927a ((wq_completion)"rcu_gp"){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 000000005a77927a ((wq_completion)"rcu_gp"){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:40 [inline] #0: 000000005a77927a ((wq_completion)"rcu_gp"){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:59 [inline] #0: 000000005a77927a ((wq_completion)"rcu_gp"){+.+.}, at: set_work_data kernel/workqueue.c:617 [inline] #0: 000000005a77927a ((wq_completion)"rcu_gp"){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline] #0: 000000005a77927a ((wq_completion)"rcu_gp"){+.+.}, at: process_one_work+0x87e/0x1750 kernel/workqueue.c:2124 #1: 000000005c5e74f8 ((work_completion)(&rew.rew_work)){+.+.}, at: process_one_work+0x8b4/0x1750 kernel/workqueue.c:2128 1 lock held by syz-executor.0/25890: #0: 0000000004506659 (pernet_ops_rwsem){++++}, at: register_netdevice_notifier+0x7e/0x630 net/core/dev.c:1642 1 lock held by syz-executor.0/25892: #0: 0000000004506659 (pernet_ops_rwsem){++++}, at: register_netdevice_notifier+0x7e/0x630 net/core/dev.c:1642 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1037 Comm: khungtaskd Not tainted 4.19.66 #40 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+0x172/0x1f0 lib/dump_stack.c:113 nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1b0/0x1f8 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline] watchdog+0x9df/0xee0 kernel/hung_task.c:287 kthread+0x354/0x420 kernel/kthread.c:246 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 17766 Comm: kworker/0:4 Not tainted 4.19.66 #40 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events_power_efficient gc_worker RIP: 0010:rcu_dynticks_curr_cpu_in_eqs+0x17/0xb0 kernel/rcu/tree.c:348 Code: c7 c7 c0 44 72 88 e8 e8 54 48 00 eb b6 66 0f 1f 44 00 00 55 48 89 e5 41 54 53 48 c7 c3 80 39 02 00 48 83 ec 08 e8 79 1a cc 01 <48> ba 00 00 00 00 00 fc ff df 89 c0 48 8d 3c c5 e0 1e 4e 88 48 89 RSP: 0018:ffff88803134fc18 EFLAGS: 00000292 RAX: 0000000000000000 RBX: 0000000000023980 RCX: ffffffff8325b5aa RDX: 0000000000000000 RSI: ffffffff8325b5b8 RDI: 0000000000000005 RBP: ffff88803134fc30 R08: ffff8880559642c0 R09: 0000000000000002 R10: ffff888055964b90 R11: 00000000860de5a1 R12: ffff88809b877a88 R13: 0000000000010000 R14: 0000000000000200 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 0000000095372000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: rcu_is_watching+0x10/0x30 kernel/rcu/tree.c:1025 rcu_read_lock include/linux/rcupdate.h:628 [inline] gc_worker+0xbb9/0xee0 net/netfilter/nf_conntrack_core.c:1217 process_one_work+0x989/0x1750 kernel/workqueue.c:2153 worker_thread+0x98/0xe40 kernel/workqueue.c:2296 kthread+0x354/0x420 kernel/kthread.c:246 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415