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-executor1:1674 blocked for more than 140 seconds. Not tainted 5.0.0-rc4+ #50 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor1 D21640 1674 1 0x80000004 Call Trace: context_switch kernel/sched/core.c:2844 [inline] __schedule+0x897/0x1e60 kernel/sched/core.c:3485 schedule+0xfe/0x350 kernel/sched/core.c:3529 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3587 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0xa3b/0x1670 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+0x3e3/0x7f5 kernel/acct.c:605 do_exit+0x1a64/0x26e0 kernel/exit.c:857 do_group_exit+0x177/0x430 kernel/exit.c:971 get_signal+0x8b4/0x19b0 kernel/signal.c:2517 do_signal+0x91/0x1ea0 arch/x86/kernel/signal.c:816 exit_to_usermode_loop+0x2f7/0x3b0 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+0x696/0x800 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4120da Code: c4 50 c3 e8 98 7e 04 00 e9 f3 fe ff ff cc cc cc 48 83 ec 20 48 89 6c 24 18 48 8d 6c 24 18 48 8b 44 24 28 0f b6 48 17 f6 c1 80 <74> 20 48 8b 00 48 89 44 24 08 48 8b 44 24 30 48 89 04 24 e8 9e ad RSP: 002b:00007ffedabf3b58 EFLAGS: 00000246 ORIG_RAX: 000000000000003d RAX: fffffffffffffe00 RBX: 0000000001bcc99b RCX: 00000000004120da RDX: 0000000040000000 RSI: 00007ffedabf3b90 RDI: ffffffffffffffff RBP: 000000000000065c R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000001bcc940 R13: 000000000014205f R14: 0000000000000262 R15: 0000000000000001 Showing all locks held in the system: 1 lock held by khungtaskd/1041: #0: 00000000d0334cb8 (rcu_read_lock){....}, at: debug_show_all_locks+0xc6/0x41d kernel/locking/lockdep.c:4389 2 locks held by getty/7838: #0: 000000000e730897 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000c80e0ce8 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 2 locks held by getty/7839: #0: 00000000277fcd1e (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 0000000067d5a941 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 2 locks held by getty/7840: #0: 00000000422e617e (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000dc3f6a1e (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 2 locks held by getty/7841: #0: 0000000024545281 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000a2d6c70d (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 2 locks held by getty/7842: #0: 000000009f06bf4f (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 0000000004d60af1 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 2 locks held by getty/7843: #0: 00000000472b6ce6 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000fd5c78a0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 2 locks held by getty/7844: #0: 0000000022816a9a (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000d7449cab (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 1 lock held by syz-executor1/1674: #0: 0000000086c32882 (&acct->lock#2){+.+.}, at: acct_get kernel/acct.c:161 [inline] #0: 0000000086c32882 (&acct->lock#2){+.+.}, at: slow_acct_process kernel/acct.c:577 [inline] #0: 0000000086c32882 (&acct->lock#2){+.+.}, at: acct_process+0x3e3/0x7f5 kernel/acct.c:605 3 locks held by syz-executor1/15912: #0: 0000000086c32882 (&acct->lock#2){+.+.}, at: acct_get kernel/acct.c:161 [inline] #0: 0000000086c32882 (&acct->lock#2){+.+.}, at: slow_acct_process kernel/acct.c:577 [inline] #0: 0000000086c32882 (&acct->lock#2){+.+.}, at: acct_process+0x3e3/0x7f5 kernel/acct.c:605 #1: 00000000c2601dab (sb_writers#3){.+.+}, at: file_start_write_trylock include/linux/fs.h:2822 [inline] #1: 00000000c2601dab (sb_writers#3){.+.+}, at: do_acct_process+0x125c/0x1560 kernel/acct.c:517 #2: 0000000002e5ae58 (&sb->s_type->i_mutex_key#9){++++}, at: inode_trylock include/linux/fs.h:777 [inline] #2: 0000000002e5ae58 (&sb->s_type->i_mutex_key#9){++++}, at: ext4_file_write_iter+0x28b/0x1410 fs/ext4/file.c:232 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1041 Comm: khungtaskd Not tainted 5.0.0-rc4+ #50 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+0x1db/0x2d0 lib/dump_stack.c:113 nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1be/0x236 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+0xbbb/0x1170 kernel/hung_task.c:287 kthread+0x357/0x430 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 13354 Comm: kworker/u4:6 Not tainted 5.0.0-rc4+ #50 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_nc_worker RIP: 0010:__lock_acquire+0x281/0x4a30 kernel/locking/lockdep.c:3279 Code: 83 bc 24 98 00 00 00 00 0f 85 50 08 00 00 4c 03 94 24 88 00 00 00 44 89 fe 66 81 e6 ff 1f 49 8d 42 20 48 89 c2 48 89 44 24 78 <48> b8 00 00 00 00 00 fc ff df 48 c1 ea 03 0f b6 14 02 84 d2 74 09 RSP: 0018:ffff88809870f510 EFLAGS: 00000006 RAX: ffff8880a4e4a9b0 RBX: 0000000000000000 RCX: 0000000000000002 RDX: ffff8880a4e4a9b0 RSI: 000000000000002b RDI: ffff8880a4e4a988 RBP: ffff88809870f7a0 R08: 0000000000000002 R09: 1ffff110149c9531 R10: ffff8880a4e4a990 R11: ffffffff899a4240 R12: ffff8880a4e4a0c0 R13: 0000000000000000 R14: 0000000000000000 R15: 000000000000002b FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 000000009b85a000 CR4: 00000000001406e0 Call Trace: lock_acquire+0x1db/0x570 kernel/locking/lockdep.c:3841 rcu_lock_acquire include/linux/rcupdate.h:223 [inline] rcu_read_lock include/linux/rcupdate.h:607 [inline] batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:419 [inline] batadv_nc_worker+0x19b/0x920 net/batman-adv/network-coding.c:730 process_one_work+0xd0c/0x1ce0 kernel/workqueue.c:2153 worker_thread+0x143/0x14a0 kernel/workqueue.c:2296 kthread+0x357/0x430 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352