netlink: 26 bytes leftover after parsing attributes in process `syz-executor.2'.
netlink: 26 bytes leftover after parsing attributes in process `syz-executor.1'.
netlink: 26 bytes leftover after parsing attributes in process `syz-executor.2'.
INFO: task syz-executor.4:2657 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.4  D28952  2657   7810 0x00000004
kobject: 'wlan216' (0000000035448b90): kobject_cleanup, parent           (null)
Call Trace:
 context_switch kernel/sched/core.c:2826 [inline]
 __schedule+0x866/0x1dc0 kernel/sched/core.c:3474
kobject: 'wlan216' (0000000035448b90): calling ktype release
kobject: 'wlan216': free name
kobject: 'rfkill886' (00000000e5522605): kobject_uevent_env
kobject: 'rfkill886' (00000000e5522605): fill_kobj_path: path = '/devices/virtual/mac80211_hwsim/hwsim883/ieee80211/phy883/rfkill886'
 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
 raw_init+0x299/0x340 net/can/raw.c:343
 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:00007f917ef78c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000029
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459829
RDX: 0000000000000001 RSI: 0000000000000003 RDI: 000000000000001d
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f917ef796d4
R13: 00000000004c847a R14: 00000000004deff8 R15: 00000000ffffffff
INFO: task syz-executor.4:2664 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.4  D27864  2664   7810 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
 raw_init+0x299/0x340 net/can/raw.c:343
 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:00007f917ef57c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000029
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459829
RDX: 0000000000000001 RSI: 0000000000000003 RDI: 000000000000001d
RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f917ef586d4
R13: 00000000004c847a R14: 00000000004deff8 R15: 00000000ffffffff

Showing all locks held in the system:
1 lock held by khungtaskd/1037:
 #0: 00000000424e7027 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e kernel/locking/lockdep.c:4435
kobject: 'phy883' (00000000d954582a): kobject_uevent_env
1 lock held by rsyslogd/7636:
2 locks held by getty/7758:
 #0: 0000000038577d93 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:363
 #1: 00000000b3003300 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154
2 locks held by getty/7759:
kobject: 'phy883' (00000000d954582a): fill_kobj_path: path = '/devices/virtual/mac80211_hwsim/hwsim883/ieee80211/phy883'
kobject: 'ieee80211' (00000000c076cc59): kobject_cleanup, parent           (null)
 #0: 000000009c821eb3 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:363
 #1: 00000000daea6613 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154
2 locks held by getty/7760:
 #0: 000000005360d205 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:363
 #1: 000000006ba2c7d6
kobject: 'ieee80211' (00000000c076cc59): calling ktype release
 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154
2 locks held by getty/7761:
kobject: 'ieee80211': free name
 #0: 
kobject: 'hwsim883' (000000001a676337): kobject_uevent_env
000000006ef86bc3
kobject: 'hwsim883' (000000001a676337): fill_kobj_path: path = '/devices/virtual/mac80211_hwsim/hwsim883'
 (&tty->ldisc_sem
kobject: 'hwsim883' (000000001a676337): kobject_uevent_env
){++++}
kobject: 'hwsim883' (000000001a676337): fill_kobj_path: path = '/devices/virtual/mac80211_hwsim/hwsim883'
kobject: 'hwsim883' (000000001a676337): kobject_cleanup, parent           (null)
, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:363
kobject: 'hwsim883' (000000001a676337): calling ktype release
 #1: 00000000cb8ed12b (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154
2 locks held by getty/7762:
 #0: 00000000a74a1519 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:363
 #1: 0000000084138d50 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154
2 locks held by getty/7763:
 #0: 00000000b8d0ae84 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:363
 #1: 00000000c59c1b98 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154
2 locks held by getty/7764:
 #0: 
kobject: 'hwsim883': free name
0000000047f835d2
kobject: 'phy883' (00000000d954582a): kobject_cleanup, parent           (null)
 (
kobject: 'phy883' (00000000d954582a): calling ktype release
&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:363
 #1: 000000007a4df6b8 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154
5 locks held by kworker/u4:6/8282:
1 lock held by syz-executor.4/2657:
 #0: 00000000f4811f63 (pernet_ops_rwsem){++++}, at: register_netdevice_notifier+0x7e/0x630 net/core/dev.c:1642
1 lock held by syz-executor.4/2664:
 #0: 00000000f4811f63
kobject: 'rfkill886' (00000000e5522605): kobject_cleanup, parent           (null)
 (
kobject: 'rfkill886' (00000000e5522605): calling ktype release
pernet_ops_rwsem
kobject: 'rfkill886': free name
){++++}
kobject: 'phy883': free name
, 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: 26150 Comm: kworker/u4:8 Not tainted 4.19.66 #40
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
RIP: 0010:context_switch kernel/sched/core.c:2794 [inline]
RIP: 0010:__schedule+0x73e/0x1dc0 kernel/sched/core.c:3474
Code: df 41 c7 44 24 38 01 00 00 00 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 2f 12 00 00 49 8d 86 28 04 00 00 4d 8b ac 24 20 04 00 00 <48> 89 c2 48 89 85 70 ff ff ff 48 b8 00 00 00 00 00 fc ff df 48 c1
RSP: 0018:ffff88804495fae8 EFLAGS: 00000046
RAX: ffff888052416a28 RBX: 0000000000000000 RCX: ffffffff81815ca6
RDX: 1ffff110154470d4 RSI: ffffffff81815caf RDI: ffff8880aa2386a0
RBP: ffff88804495fbb8 R08: ffff888052416600 R09: ffffed1015d050b2
R10: ffffed1015d050b1 R11: ffff8880ae82858f R12: ffff8880aa238280
R13: 0000000000000000 R14: ffff888052416600 R15: ffff8880ae82d240
FS:  0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd75f13c000 CR3: 00000000940fd000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 preempt_schedule_notrace kernel/sched/core.c:3672 [inline]
 preempt_schedule_notrace+0xa0/0x130 kernel/sched/core.c:3643
 ___preempt_schedule_notrace+0x16/0x2f
 rcu_is_watching+0x23/0x30 kernel/rcu/tree.c:1026
 rcu_read_unlock include/linux/rcupdate.h:677 [inline]
 batadv_nc_process_nc_paths.part.0+0x30e/0x3c0 net/batman-adv/network-coding.c:710
 batadv_nc_process_nc_paths net/batman-adv/network-coding.c:690 [inline]
 batadv_nc_worker+0x550/0x760 net/batman-adv/network-coding.c:739
 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