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-executor.5:13420 blocked for more than 140 seconds. Not tainted 4.19.76 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D23592 13420 1 0x80000004 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 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3576 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x726/0x1300 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+0x2e5/0x61e kernel/acct.c:605 do_exit+0x17ca/0x2fa0 kernel/exit.c:866 do_group_exit+0x135/0x370 kernel/exit.c:979 get_signal+0x3ec/0x1fc0 kernel/signal.c:2574 do_signal+0x95/0x1960 arch/x86/kernel/signal.c:821 exit_to_usermode_loop+0x244/0x2c0 arch/x86/entry/common.c:163 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:271 [inline] do_syscall_64+0x53d/0x620 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4139ba Code: 00 00 0f 85 76 04 00 00 45 31 d2 eb 07 4c 8d 51 07 4c 89 e9 44 0f b6 1f 4d 89 dc 49 83 e3 7f 49 89 cd 4c 89 d1 49 d3 e3 48 83 40 4d 19 f6 4d 21 de 4d 09 f1 48 ff c7 41 0f ba e4 07 72 ce 31 RSP: 002b:00007ffda9575d88 EFLAGS: 00000246 ORIG_RAX: 000000000000003d RAX: fffffffffffffe00 RBX: 000055555564d940 RCX: 00000000004139ba RDX: 0000000040000000 RSI: 00007ffda9575dc0 RDI: ffffffffffffffff RBP: 00000000000002c0 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000000001c R13: 00007ffda9575dc0 R14: 000055555564d99b R15: 00007ffda9575dd0 Showing all locks held in the system: 1 lock held by khungtaskd/1038: #0: 00000000583f10be (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e kernel/locking/lockdep.c:4438 2 locks held by getty/7485: #0: 00000000d1b207d2 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b59c968b (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/7486: #0: 00000000439bbd5f (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 000000003702c11f (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/7487: #0: 00000000843451ed (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000e84f118c (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/7488: #0: 0000000082469a6e (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000e7155c33 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/7489: #0: 000000006e5b1350 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 000000006ddb2f67 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/7490: #0: 00000000d1102b06 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000a66d53c5 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/7491: #0: 00000000785308b6 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000fab6f869 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 1 lock held by syz-executor.5/13420: #0: 00000000894fb765 (&acct->lock#2){+.+.}, at: acct_get kernel/acct.c:161 [inline] #0: 00000000894fb765 (&acct->lock#2){+.+.}, at: slow_acct_process kernel/acct.c:577 [inline] #0: 00000000894fb765 (&acct->lock#2){+.+.}, at: acct_process+0x2e5/0x61e kernel/acct.c:605 3 locks held by syz-executor.5/19566: #0: 00000000894fb765 (&acct->lock#2){+.+.}, at: acct_get kernel/acct.c:161 [inline] #0: 00000000894fb765 (&acct->lock#2){+.+.}, at: slow_acct_process kernel/acct.c:577 [inline] #0: 00000000894fb765 (&acct->lock#2){+.+.}, at: acct_process+0x2e5/0x61e kernel/acct.c:605 #1: 00000000564f2e69 (sb_writers#4){.+.+}, at: file_start_write_trylock include/linux/fs.h:2782 [inline] #1: 00000000564f2e69 (sb_writers#4){.+.+}, at: do_acct_process+0xf37/0x1150 kernel/acct.c:517 #2: 00000000c360a895 (&sb->s_type->i_mutex_key#9){++++}, at: inode_trylock include/linux/fs.h:767 [inline] #2: 00000000c360a895 (&sb->s_type->i_mutex_key#9){++++}, at: ext4_file_write_iter+0x23f/0x1060 fs/ext4/file.c:236 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1038 Comm: khungtaskd Not tainted 4.19.76 #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 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 2346 Comm: kworker/u4:5 Not tainted 4.19.76 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_nc_worker RIP: 0010:trace_hardirqs_on+0x1/0x220 kernel/trace/trace_preemptirq.c:22 Code: 00 eb 93 e8 01 5a 31 00 e9 6a ff ff ff 4c 89 ef e8 f4 59 31 00 e9 34 ff ff ff 0f 1f 44 00 00 66 2e 0f 1f 84 00 00 00 00 00 55 <48> 89 e5 41 57 41 56 41 55 41 54 53 48 83 ec 08 e8 4a c6 fa ff 65 RSP: 0018:ffff8880a1a27c10 EFLAGS: 00000097 RAX: 0000000080000001 RBX: 0000000000000201 RCX: 0000000000000000 RDX: 0000000000000004 RSI: ffffffff8325eac8 RDI: 0000000000000001 RBP: ffff8880a1a27c38 R08: ffff8880a1a166c0 R09: ffffed1013b6198a R10: ffffed1013b61989 R11: ffff88809db0cc4b R12: ffffffff86d8f9c5 R13: ffff8880a1a166c0 R14: ffffffff86d902f0 R15: 0000000000000037 FS: 0000000000000000(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 000000009a54a000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:176 [inline] _raw_spin_unlock_bh+0x31/0x40 kernel/locking/spinlock.c:200 spin_unlock_bh include/linux/spinlock.h:374 [inline] batadv_nc_purge_paths+0x265/0x370 net/batman-adv/network-coding.c:482 batadv_nc_worker+0x2cf/0x760 net/batman-adv/network-coding.c:733 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