INFO: task syz-executor.2:2139 blocked for more than 140 seconds. Not tainted 5.0.0-rc7+ #98 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D26832 2139 7466 0x80000002 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 Call Trace: context_switch kernel/sched/core.c:2844 [inline] __schedule+0x817/0x1cc0 kernel/sched/core.c:3485 kobject: 'loop3' (00000000fe122b5d): kobject_uevent_env kobject: 'loop3' (00000000fe122b5d): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop2' (00000000d220e5db): kobject_uevent_env schedule+0x92/0x180 kernel/sched/core.c:3529 kobject: 'loop2' (00000000d220e5db): fill_kobj_path: path = '/devices/virtual/block/loop2' schedule_timeout+0x8ca/0xfd0 kernel/time/timer.c:1779 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 protocol 88fb is buggy, dev hsr_slave_1 kobject: 'loop3' (00000000fe122b5d): kobject_uevent_env kobject: 'loop3' (00000000fe122b5d): fill_kobj_path: path = '/devices/virtual/block/loop3' do_wait_for_common kernel/sched/completion.c:83 [inline] __wait_for_common kernel/sched/completion.c:104 [inline] wait_for_common kernel/sched/completion.c:115 [inline] wait_for_completion+0x29c/0x440 kernel/sched/completion.c:136 kobject: 'loop2' (00000000d220e5db): kobject_uevent_env kobject: 'loop2' (00000000d220e5db): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (00000000fe122b5d): kobject_uevent_env crypto_wait_req include/linux/crypto.h:688 [inline] crypto_wait_req include/linux/crypto.h:683 [inline] tls_sw_free_resources_tx+0x3bc/0xa20 net/tls/tls_sw.c:1795 kobject: 'loop3' (00000000fe122b5d): fill_kobj_path: path = '/devices/virtual/block/loop3' tls_sk_proto_close+0x66c/0x760 net/tls/tls_main.c:280 inet_release+0x105/0x1f0 net/ipv4/af_inet.c:428 inet6_release+0x53/0x80 net/ipv6/af_inet6.c:473 __sock_release+0xd3/0x2b0 net/socket.c:579 sock_close+0x1b/0x30 net/socket.c:1140 __fput+0x2df/0x8d0 fs/file_table.c:278 ____fput+0x16/0x20 fs/file_table.c:309 task_work_run+0x14a/0x1c0 kernel/task_work.c:113 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0x92c/0x2fd0 kernel/exit.c:875 do_group_exit+0x135/0x370 kernel/exit.c:979 get_signal+0x399/0x1d50 kernel/signal.c:2575 kobject: 'loop1' (00000000ffd44528): kobject_uevent_env do_signal+0x87/0x1940 arch/x86/kernel/signal.c:816 kobject: 'loop1' (00000000ffd44528): fill_kobj_path: path = '/devices/virtual/block/loop1' exit_to_usermode_loop+0x244/0x2c0 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+0x52d/0x610 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457e29 Code: ad b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007feffdf59cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 000000000073bfa8 RCX: 0000000000457e29 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000073bfa8 RBP: 000000000073bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000073bfac R13: 00007ffef750a77f R14: 00007feffdf5a9c0 R15: 000000000073bfac Showing all locks held in the system: 3 locks held by kworker/u4:2/24: 1 lock held by khungtaskd/1040: #0: 000000008671173a (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e kernel/locking/lockdep.c:4389 1 lock held by rsyslogd/7330: #0: 0000000032ad8a7a (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 fs/file.c:795 2 locks held by getty/7420: #0: 00000000334030f0 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000910cf0d8 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by getty/7421: #0: 000000000e20b325 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000a3e1fe2f (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by getty/7422: #0: 00000000fd9d80f5 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000733984f2 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by getty/7423: #0: 0000000085f4ed3b (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 0000000014f02bac (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by getty/7424: #0: 00000000c4771cdb (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 000000007fd76436 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by getty/7425: kobject: 'loop5' (00000000646294c7): kobject_uevent_env kobject: 'loop5' (00000000646294c7): fill_kobj_path: path = '/devices/virtual/block/loop5' #0: 00000000c06fa70f (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000ef347fce (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 kobject: 'loop3' (00000000fe122b5d): kobject_uevent_env kobject: 'loop3' (00000000fe122b5d): fill_kobj_path: path = '/devices/virtual/block/loop3' 2 locks held by getty/7426: #0: 00000000732999ef (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 kobject: 'loop2' (00000000d220e5db): kobject_uevent_env #1: 00000000009ad2a6 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 kobject: 'loop2' (00000000d220e5db): fill_kobj_path: path = '/devices/virtual/block/loop2' 2 locks held by syz-executor.2/2139: #0: 00000000ea18d011 (&sb->s_type->i_mutex_key#11){+.+.}, at: inode_lock include/linux/fs.h:757 [inline] #0: 00000000ea18d011 (&sb->s_type->i_mutex_key#11){+.+.}, at: __sock_release+0x89/0x2b0 net/socket.c:578 kobject: 'loop3' (00000000fe122b5d): kobject_uevent_env #1: 00000000fedb836e (sk_lock-AF_INET6){+.+.}, at: lock_sock include/net/sock.h:1506 [inline] #1: 00000000fedb836e (sk_lock-AF_INET6){+.+.}, at: tls_sk_proto_close+0xd6/0x760 net/tls/tls_main.c:264 kobject: 'loop3' (00000000fe122b5d): fill_kobj_path: path = '/devices/virtual/block/loop3' 1 lock held by syz-executor.4/5449: #0: 0000000097bc2123 (&sb->s_type->i_mutex_key#11){+.+.}, at: inode_lock include/linux/fs.h:757 [inline] #0: 0000000097bc2123 (&sb->s_type->i_mutex_key#11){+.+.}, at: __sock_release+0x89/0x2b0 net/socket.c:578 1 lock held by syz-executor.0/5478: 1 lock held by syz-executor.1/5484: 1 lock held by syz-executor.5/5490: ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1040 Comm: khungtaskd Not tainted 5.0.0-rc7+ #98 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+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+0x9df/0xee0 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 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 21 Comm: kworker/u4:1 Not tainted 5.0.0-rc7+ #98 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_nc_worker RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:26 [inline] RIP: 0010:check_kcov_mode kernel/kcov.c:67 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x11/0x50 kernel/kcov.c:101 Code: fb e5 08 00 00 00 00 e9 c8 e9 ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 55 48 89 e5 48 8b 75 08 65 48 8b 04 25 40 ee 01 00 <65> 8b 15 38 0c 92 7e 81 e2 00 01 1f 00 75 2b 8b 90 d8 12 00 00 83 RSP: 0018:ffff8880aa3f7c88 EFLAGS: 00000292 RAX: ffff8880aa3ea580 RBX: 000000000002ddc0 RCX: ffffffff86e78171 RDX: 0000000000000000 RSI: ffffffff832b0a49 RDI: 0000000000000001 RBP: ffff8880aa3f7c88 R08: ffff8880aa3ea580 R09: ffffed1015d05bd0 R10: ffffed1015d05bcf R11: ffff8880ae82de7b R12: 0000000000000001 R13: 0000000000000253 R14: 0000000000000000 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000007101b4 CR3: 0000000099135000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: debug_smp_processor_id+0x9/0x20 lib/smp_processor_id.c:56 rcu_dynticks_curr_cpu_in_eqs+0x17/0xb0 kernel/rcu/tree.c:303 rcu_is_watching+0x10/0x30 kernel/rcu/tree.c:932 rcu_read_unlock include/linux/rcupdate.h:657 [inline] batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:423 [inline] batadv_nc_worker+0x485/0x760 net/batman-adv/network-coding.c:730 process_one_work+0x98e/0x1790 kernel/workqueue.c:2173 worker_thread+0x98/0xe40 kernel/workqueue.c:2319 kthread+0x357/0x430 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 kobject: 'loop4' (000000005b8ab0d8): kobject_uevent_env