INFO: task syz-executor.3:27882 blocked for more than 140 seconds. Not tainted 4.19.80 #0 kobject: 'wlan224' (0000000020da6903): kobject_cleanup, parent (null) kobject: 'wlan224' (0000000020da6903): calling ktype release "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kobject: 'wlan224': free name syz-executor.3 D29496 27882 7641 0x00000004 kobject: 'rfkill775' (00000000a0fd8ea1): kobject_uevent_env Call Trace: context_switch kernel/sched/core.c:2826 [inline] __schedule+0x866/0x1dc0 kernel/sched/core.c:3515 kobject: 'rfkill775' (00000000a0fd8ea1): fill_kobj_path: path = '/devices/virtual/mac80211_hwsim/hwsim775/ieee80211/phy773/rfkill775' schedule+0x92/0x1c0 kernel/sched/core.c:3559 __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: 0033:0x459ef9 Code: Bad RIP value. RSP: 002b:00007f967bba0c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459ef9 RDX: 0000000000000002 RSI: 0000000000000002 RDI: 000000000000001d RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f967bba16d4 R13: 00000000004c8f16 R14: 00000000004e02c0 R15: 00000000ffffffff INFO: task syz-executor.3:27885 blocked for more than 140 seconds. Not tainted 4.19.80 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D29496 27885 7641 0x00000004 Call Trace: context_switch kernel/sched/core.c:2826 [inline] __schedule+0x866/0x1dc0 kernel/sched/core.c:3515 schedule+0x92/0x1c0 kernel/sched/core.c:3559 __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: 0033:0x459ef9 Code: Bad RIP value. RSP: 002b:00007f967bb7fc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459ef9 RDX: 0000000000000002 RSI: 0000000000000002 RDI: 000000000000001d RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f967bb806d4 R13: 00000000004c8f16 R14: 00000000004e02c0 R15: 00000000ffffffff Showing all locks held in the system: 4 locks held by kworker/u4:3/374: #0: 0000000031aaf187 ((wq_completion)"%s""netns"){+.+.}, at: __write_once_size include/linux/compiler.h:220 [inline] #0: 0000000031aaf187 ((wq_completion)"%s""netns"){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 0000000031aaf187 ((wq_completion)"%s""netns"){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:40 [inline] #0: 0000000031aaf187 ((wq_completion)"%s""netns"){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:59 [inline] #0: 0000000031aaf187 ((wq_completion)"%s""netns"){+.+.}, at: set_work_data kernel/workqueue.c:617 [inline] #0: 0000000031aaf187 ((wq_completion)"%s""netns"){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline] #0: 0000000031aaf187 ((wq_completion)"%s""netns"){+.+.}, at: process_one_work+0x87e/0x1750 kernel/workqueue.c:2124 kobject: 'phy773' (00000000c4579134): kobject_uevent_env #1: 00000000627a76e1 (net_cleanup_work){+.+.}, at: process_one_work+0x8b4/0x1750 kernel/workqueue.c:2128 kobject: 'phy773' (00000000c4579134): fill_kobj_path: path = '/devices/virtual/mac80211_hwsim/hwsim775/ieee80211/phy773' #2: 0000000098eef571 (pernet_ops_rwsem){++++}, at: cleanup_net+0xae/0x960 net/core/net_namespace.c:519 kobject: 'ieee80211' (0000000020425e51): kobject_cleanup, parent (null) #3: 0000000045474c18 (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77 1 lock held by khungtaskd/1037: kobject: 'ieee80211' (0000000020425e51): calling ktype release #0: 0000000012c7cba8 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e kernel/locking/lockdep.c:4438 kobject: 'ieee80211': free name 1 lock held by rsyslogd/7466: kobject: 'hwsim775' (000000008fc0f863): kobject_uevent_env #0: 00000000ee2d986e (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 fs/file.c:767 kobject: 'hwsim775' (000000008fc0f863): fill_kobj_path: path = '/devices/virtual/mac80211_hwsim/hwsim775' 2 locks held by getty/7588: #0: 00000000b93433e6 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 kobject: 'hwsim775' (000000008fc0f863): kobject_uevent_env #1: 000000003534981b (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/7589: #0: 000000002a59207f (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 kobject: 'hwsim775' (000000008fc0f863): fill_kobj_path: path = '/devices/virtual/mac80211_hwsim/hwsim775' #1: 00000000ca9cd490 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 kobject: 'hwsim775' (000000008fc0f863): kobject_cleanup, parent (null) kobject: 'hwsim775' (000000008fc0f863): calling ktype release 2 locks held by getty/7590: kobject: 'hwsim775': free name kobject: 'phy773' (00000000c4579134): kobject_cleanup, parent (null) #0: kobject: 'phy773' (00000000c4579134): calling ktype release kobject: 'rfkill775' (00000000a0fd8ea1): kobject_cleanup, parent (null) kobject: 'rfkill775' (00000000a0fd8ea1): calling ktype release kobject: 'rfkill775': free name kobject: 'phy773': free name 00000000258f1988 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000f307b7d6 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/7591: #0: 00000000f4c67db2 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 0000000049b106bf (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/7592: #0: 0000000013476610 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000509b67f3 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/7593: #0: 000000005eceb997 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 000000004f9966de (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/7594: #0: 00000000c5dab15a (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 0000000084f0fd84 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 1 lock held by syz-executor.3/27882: #0: 0000000098eef571 (pernet_ops_rwsem){++++}, at: register_netdevice_notifier+0x7e/0x630 net/core/dev.c:1642 1 lock held by syz-executor.3/27885: #0: 0000000098eef571 (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 4.19.80 #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+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: 25536 Comm: kworker/0:1 Not tainted 4.19.80 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events_power_efficient gc_worker RIP: 0010:__lock_acquire+0x349/0x49c0 kernel/locking/lockdep.c:3345 Code: c9 74 09 80 f9 03 0f 8e b2 0d 00 00 0f b7 48 20 81 e1 ff 1f 00 00 44 39 d9 75 0f 48 83 bc 24 98 00 00 00 00 0f 85 e3 07 00 00 <4c> 03 94 24 88 00 00 00 44 89 d9 66 81 e1 ff 1f 49 8d 42 20 48 89 RSP: 0018:ffff888099ab79f0 EFLAGS: 00000097 RAX: ffff88807f8b8fd0 RBX: 0000000000000000 RCX: 000000000000002b RDX: 0000000000000000 RSI: 1ffff1100ff171fe RDI: ffff88807f8b8ff0 RBP: ffff888099ab7bc0 R08: 0000000000000001 R09: 0000000000000003 R10: 0000000000000078 R11: 000000000000034e R12: 0000000000000002 R13: 0000000000000001 R14: ffff88807f8b8700 R15: ffffffff893d7a88 FS: 0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c42f430ef0 CR3: 00000000960a5000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:3903 seqcount_lockdep_reader_access include/linux/seqlock.h:81 [inline] read_seqcount_begin include/linux/seqlock.h:164 [inline] nf_conntrack_get_ht include/net/netfilter/nf_conntrack.h:302 [inline] gc_worker+0x26a/0xee0 net/netfilter/nf_conntrack_core.c:1219 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