team0 (unregistering): Port device team_slave_1 removed team0 (unregistering): Port device team_slave_0 removed bond0 (unregistering): Releasing backup interface bond_slave_1 bond0 (unregistering): Releasing backup interface bond_slave_0 bond0 (unregistering): Released all slaves INFO: task syz-executor5:7541 blocked for more than 140 seconds. Not tainted 4.20.0+ #169 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor5 D15400 7541 1 0x80000004 Call Trace: context_switch kernel/sched/core.c:2831 [inline] __schedule+0x86c/0x1ed0 kernel/sched/core.c:3472 schedule+0xfe/0x460 kernel/sched/core.c:3516 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3574 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0xbe7/0x1700 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 acct_get kernel/acct.c:161 [inline] slow_acct_process kernel/acct.c:577 [inline] acct_process+0x48b/0x875 kernel/acct.c:605 do_exit+0x1b89/0x26d0 kernel/exit.c:857 do_group_exit+0x177/0x440 kernel/exit.c:970 get_signal+0x8b0/0x1980 kernel/signal.c:2517 do_signal+0x9c/0x21c0 arch/x86/kernel/signal.c:816 exit_to_usermode_loop+0x2e5/0x380 arch/x86/entry/common.c:162 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x41169a Code: 4c 24 28 48 8b 5c 24 50 eb 95 48 8d 0d 07 c1 1b 01 48 39 c8 0f 85 ac 00 00 00 48 8d 05 ef c0 1b 01 48 89 04 24 e8 66 df ff ff 97 00 00 00 48 89 4c 24 38 48 8b 44 24 20 48 89 04 24 48 89 4c RSP: 002b:00007fff1fc5efd8 EFLAGS: 00000246 ORIG_RAX: 000000000000003d RAX: fffffffffffffe00 RBX: 0000000001aa699b RCX: 000000000041169a RDX: 0000000040000000 RSI: 00007fff1fc5f010 RDI: ffffffffffffffff RBP: 000000000000064f R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000001aa6940 R13: 000000000007a060 R14: 0000000000000193 R15: 0000000000000005 Showing all locks held in the system: 1 lock held by khungtaskd/1027: #0: 0000000071c50529 (rcu_read_lock){....}, at: debug_show_all_locks+0xd0/0x424 kernel/locking/lockdep.c:4379 3 locks held by kworker/u4:4/2501: #0: 0000000048e41ab3 (&rq->lock){-.-.}, at: idle_balance kernel/sched/fair.c:9678 [inline] #0: 0000000048e41ab3 (&rq->lock){-.-.}, at: pick_next_task_fair+0x1336/0x1b40 kernel/sched/fair.c:6757 #1: 0000000071c50529 (rcu_read_lock){....}, at: __update_idle_core+0xc4/0x600 kernel/sched/fair.c:5968 #2: 0000000016600931 (&base->lock){-.-.}, at: lock_timer_base+0xbb/0x2b0 kernel/time/timer.c:937 2 locks held by rs:main Q:Reg/7227: 1 lock held by rsyslogd/7229: #0: 00000000be418ad1 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1bb/0x200 fs/file.c:766 2 locks held by getty/7319: #0: 000000006fe29bd7 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000c5323807 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 2 locks held by getty/7320: #0: 00000000660625ae (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 000000002105ad29 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 2 locks held by getty/7321: #0: 000000003f7a4093 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 000000003f9d655b (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 2 locks held by getty/7322: #0: 00000000efb4fa76 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000959418ca (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 2 locks held by getty/7323: #0: 00000000e8c5b659 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000471dd476 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 2 locks held by getty/7324: #0: 000000007dd8ac09 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000ce0a8629 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 2 locks held by getty/7325: #0: 00000000b40abb81 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 0000000068c3c9bc (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 1 lock held by syz-executor5/7541: #0: 00000000edf14274 (&acct->lock#2){+.+.}, at: acct_get kernel/acct.c:161 [inline] #0: 00000000edf14274 (&acct->lock#2){+.+.}, at: slow_acct_process kernel/acct.c:577 [inline] #0: 00000000edf14274 (&acct->lock#2){+.+.}, at: acct_process+0x48b/0x875 kernel/acct.c:605 3 locks held by syz-executor5/21122: #0: 00000000edf14274 (&acct->lock#2){+.+.}, at: acct_get kernel/acct.c:161 [inline] #0: 00000000edf14274 (&acct->lock#2){+.+.}, at: slow_acct_process kernel/acct.c:577 [inline] #0: 00000000edf14274 (&acct->lock#2){+.+.}, at: acct_process+0x48b/0x875 kernel/acct.c:605 #1: 00000000e440007a (sb_writers#3){.+.+}, at: file_start_write_trylock include/linux/fs.h:2817 [inline] #1: 00000000e440007a (sb_writers#3){.+.+}, at: do_acct_process+0x1338/0x1660 kernel/acct.c:517 #2: 00000000fadfd235 (&sb->s_type->i_mutex_key#9){++++}, at: inode_trylock include/linux/fs.h:777 [inline] #2: 00000000fadfd235 (&sb->s_type->i_mutex_key#9){++++}, at: ext4_file_write_iter+0x2a1/0x1420 fs/ext4/file.c:232 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1027 Comm: khungtaskd Not tainted 4.20.0+ #169 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+0x1d3/0x2c6 lib/dump_stack.c:113 nmi_cpu_backtrace.cold.4+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1c2/0x22c 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:205 [inline] watchdog+0xb51/0x1060 kernel/hung_task.c:289 kthread+0x35a/0x440 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 7 Comm: kworker/u4:0 Not tainted 4.20.0+ #169 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_purge_orig RIP: 0010:debug_spin_unlock kernel/locking/spinlock_debug.c:99 [inline] RIP: 0010:do_raw_spin_unlock+0x11d/0x330 kernel/locking/spinlock_debug.c:134 Code: 0f 8e d4 01 00 00 49 c1 ec 03 45 85 f6 45 89 77 c0 48 b8 00 00 00 00 00 fc ff df 41 c6 04 04 f8 0f 84 86 01 00 00 4c 8d 73 10 <48> b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 80 3c 02 00 0f RSP: 0018:ffff8880a9e1f398 EFLAGS: 00000202 RAX: dffffc0000000000 RBX: ffff8880589c33a8 RCX: ffffffff816293a7 RDX: 1ffff110153c3e77 RSI: 0000000000000004 RDI: ffff8880589c33a8 RBP: ffff8880a9e1f420 R08: ffffed100b138676 R09: ffffed100b138675 R10: ffffed100b138675 R11: ffff8880589c33ab R12: 1ffff110153c3e77 R13: 1ffff110153c3e73 R14: ffff8880589c33b8 R15: ffff8880a9e1f3f8 FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000001cc8000 CR3: 0000000093da4000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:175 [inline] _raw_spin_unlock_bh+0x22/0x40 kernel/locking/spinlock.c:200 spin_unlock_bh include/linux/spinlock.h:374 [inline] batadv_purge_orig_ref+0x561/0x1380 net/batman-adv/originator.c:1376 batadv_purge_orig+0x19/0x60 net/batman-adv/originator.c:1389 process_one_work+0xc90/0x1c40 kernel/workqueue.c:2153 worker_thread+0x17f/0x1390 kernel/workqueue.c:2296 kthread+0x35a/0x440 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352