INFO: task syz-executor.3:28525 blocked for more than 143 seconds. Not tainted 5.7.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D28120 28525 7368 0x00000004 Call Trace: context_switch kernel/sched/core.c:3367 [inline] __schedule+0x937/0x1ff0 kernel/sched/core.c:4083 __sched_text_start+0x8/0x8 mark_held_locks+0xe0/0xe0 kernel/locking/lockdep.c:3620 schedule+0xd0/0x2a0 kernel/sched/core.c:4158 schedule_timeout+0x55b/0x850 kernel/time/timer.c:1874 test_bit include/asm-generic/bitops/instrumented-non-atomic.h:110 [inline] hlock_class kernel/locking/lockdep.c:179 [inline] mark_lock+0x12b/0xf10 kernel/locking/lockdep.c:3912 find_held_lock+0x2d/0x110 kernel/locking/lockdep.c:4458 usleep_range+0x160/0x160 kernel/time/timer.c:2093 do_wait_for_common kernel/sched/completion.c:84 [inline] __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x162/0x270 kernel/sched/completion.c:138 print_usage_bug+0x240/0x240 kernel/locking/lockdep.c:101 lock_downgrade+0x840/0x840 kernel/locking/lockdep.c:4579 mark_held_locks+0x9f/0xe0 kernel/locking/lockdep.c:3628 __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] _raw_spin_unlock_irq+0x1f/0x80 kernel/locking/spinlock.c:199 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x16a/0x270 kernel/sched/completion.c:138 wait_for_completion_interruptible+0x2e0/0x2e0 kernel/sched/completion.c:89 mark_held_locks+0x9f/0xe0 kernel/locking/lockdep.c:3628 __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] _raw_spin_unlock_irq+0x1f/0x80 kernel/locking/spinlock.c:199 __flush_work+0x4fd/0xa80 kernel/workqueue.c:3045 queue_delayed_work_on+0x210/0x210 arch/x86/include/asm/paravirt.h:759 __write_once_size include/linux/compiler.h:226 [inline] INIT_LIST_HEAD include/linux/list.h:35 [inline] init_pwq+0x350/0x350 kernel/workqueue.c:3747 test_bit include/asm-generic/bitops/instrumented-non-atomic.h:110 [inline] hlock_class kernel/locking/lockdep.c:179 [inline] mark_lock+0x12b/0xf10 kernel/locking/lockdep.c:3912 mark_held_locks+0x9f/0xe0 kernel/locking/lockdep.c:3628 __cancel_work_timer+0x3a2/0x500 kernel/workqueue.c:3132 mod_delayed_work_on+0x1f0/0x1f0 arch/x86/include/asm/paravirt.h:759 lock_acquire+0x1f2/0x8f0 kernel/locking/lockdep.c:4934 inode_lock include/linux/fs.h:797 [inline] __sock_release+0x86/0x280 net/socket.c:604 lock_release+0x800/0x800 kernel/locking/lockdep.c:4689 fault_around_bytes_set+0x90/0x90 mm/memory.c:3732 __sock_release+0x280/0x280 net/socket.c:605 tls_sk_proto_close+0x4a9/0xaf0 net/tls/tls_main.c:305 wait_on_pending_writer+0x3f0/0x3f0 net/tls/tls_main.c:89 ip_mc_drop_socket+0x16/0x260 net/ipv4/igmp.c:2676 __sock_release+0x280/0x280 net/socket.c:605 inet_release+0xe4/0x1f0 net/ipv4/af_inet.c:427 inet6_release+0x4c/0x70 net/ipv6/af_inet6.c:471 __sock_release+0xcd/0x280 net/socket.c:605 sock_close+0x18/0x20 net/socket.c:1283 __fput+0x33e/0x880 fs/file_table.c:280 task_work_run+0xf4/0x1b0 kernel/task_work.c:123 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x2fa/0x360 arch/x86/entry/common.c:165 prepare_exit_to_usermode arch/x86/entry/common.c:196 [inline] syscall_return_slowpath arch/x86/entry/common.c:279 [inline] do_syscall_64+0x6b1/0x7d0 arch/x86/entry/common.c:305 entry_SYSCALL_64_after_hwframe+0x49/0xb3 Showing all locks held in the system: 1 lock held by khungtaskd/1139: #0: ffffffff899bea80 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:5754 1 lock held by in:imklog/6724: #0: ffff8880948c88b0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:826 3 locks held by kworker/1:8/10055: #0: ffff8880aa026d38 ((wq_completion)events){+.+.}-{0:0}, at: __write_once_size include/linux/compiler.h:226 [inline] #0: ffff8880aa026d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff8880aa026d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline] #0: ffff8880aa026d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline] #0: ffff8880aa026d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:615 [inline] #0: ffff8880aa026d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:642 [inline] #0: ffff8880aa026d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x844/0x16a0 kernel/workqueue.c:2239 #1: ffffc90004637dc0 ((work_completion)(&(&sw_ctx_tx->tx_work.work)->work)){+.+.}-{0:0}, at: process_one_work+0x878/0x16a0 kernel/workqueue.c:2243 #2: ffff8880a19428d8 (&ctx->tx_lock){+.+.}-{3:3}, at: tx_work_handler+0x127/0x190 net/tls/tls_sw.c:2215 2 locks held by kworker/u4:7/10339: #0: ffff8880ae737998 (&rq->lock){-.-.}-{2:2}, at: newidle_balance+0x9be/0xdb0 kernel/sched/fair.c:10512 #1: ffffffff899bea80 (rcu_read_lock){....}-{1:2}, at: __update_idle_core+0x42/0x3e0 kernel/sched/fair.c:5969 1 lock held by syz-executor.3/28525: #0: ffff888086804750 (&sb->s_type->i_mutex_key#14){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:797 [inline] #0: ffff888086804750 (&sb->s_type->i_mutex_key#14){+.+.}-{3:3}, at: __sock_release+0x86/0x280 net/socket.c:604 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1139 Comm: khungtaskd Not tainted 5.7.0-rc5-syzkaller #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+0x188/0x20d lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x70/0xb1 lib/nmi_backtrace.c:101 lapic_can_unplug_cpu.cold+0x3b/0x3b nmi_trigger_cpumask_backtrace+0x231/0x27e lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:205 [inline] watchdog+0xa8c/0x1010 kernel/hung_task.c:289 reset_hung_task_detector+0x30/0x30 kernel/hung_task.c:243 kthread+0x388/0x470 kernel/kthread.c:268 kthread_mod_delayed_work+0x1a0/0x1a0 kernel/kthread.c:1090 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:351 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 10339 Comm: kworker/u4:7 Not tainted 5.7.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_nc_worker RIP: 0010:__kasan_check_read+0x4/0x10 mm/kasan/common.c:72 Code: 24 14 e9 15 9f ff ff 48 8b 73 58 89 c2 48 c7 c7 d0 2b 49 89 f7 da e8 24 eb ab ff e9 ab ef ff ff cc cc cc cc cc cc 48 8b 0c 24 <89> f6 31 d2 e9 93 28 00 00 0f 1f 00 48 8b 0c 24 89 f6 ba 01 00 00 RSP: 0018:ffffc90001b07a60 EFLAGS: 00000047 RAX: 0000000000000000 RBX: 000000000000002c RCX: ffffffff8159319b RDX: 1ffff1100ab1b167 RSI: 0000000000000008 RDI: ffffffff8c2ef960 RBP: ffff8880558d8b18 R08: 0000000000000001 R09: fffffbfff185df45 R10: ffffffff8c2efa27 R11: fffffbfff185df44 R12: ffff8880558d8200 R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff8a89c910 FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb3fcb5d020 CR3: 0000000090ee5000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: test_bit include/asm-generic/bitops/instrumented-non-atomic.h:110 [inline] hlock_class kernel/locking/lockdep.c:179 [inline] __lock_acquire+0xcbb/0x4c50 kernel/locking/lockdep.c:4352 lockdep_unlock kernel/locking/lockdep.c:101 [inline] lockdep_unlock kernel/locking/lockdep.c:99 [inline] debug_locks_off_graph_unlock kernel/locking/lockdep.c:146 [inline] print_irq_inversion_bug kernel/locking/lockdep.c:3400 [inline] check_usage_backwards+0x3e1/0x4e0 kernel/locking/lockdep.c:3499 mark_held_locks+0xe0/0xe0 kernel/locking/lockdep.c:3620 debug_object_deactivate lib/debugobjects.c:732 [inline] debug_object_deactivate+0x1dd/0x320 lib/debugobjects.c:698 mark_held_locks+0xe0/0xe0 kernel/locking/lockdep.c:3620 lock_acquire+0x1f2/0x8f0 kernel/locking/lockdep.c:4934 batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:405 [inline] batadv_nc_worker+0xe0/0x760 net/batman-adv/network-coding.c:718 lock_release+0x800/0x800 kernel/locking/lockdep.c:4689 process_one_work+0x878/0x16a0 kernel/workqueue.c:2243 lock_downgrade+0x840/0x840 kernel/locking/lockdep.c:4579 rcu_lock_acquire include/linux/rcupdate.h:208 [inline] rcu_read_lock include/linux/rcupdate.h:601 [inline] batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:407 [inline] batadv_nc_worker+0x114/0x760 net/batman-adv/network-coding.c:718 batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:405 [inline] batadv_nc_worker+0xe0/0x760 net/batman-adv/network-coding.c:718 process_one_work+0x965/0x16a0 kernel/workqueue.c:2268 lock_release+0x800/0x800 kernel/locking/lockdep.c:4689 pwq_dec_nr_in_flight+0x310/0x310 kernel/workqueue.c:1198 rwlock_bug.part.0+0x90/0x90 include/linux/sched.h:1329 worker_thread+0x96/0xe20 kernel/workqueue.c:2414 process_one_work+0x16a0/0x16a0 kernel/workqueue.c:2273 kthread+0x388/0x470 kernel/kthread.c:268 kthread_mod_delayed_work+0x1a0/0x1a0 kernel/kthread.c:1090 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:351