INFO: task syz-executor561:9073 blocked for more than 143 seconds. Not tainted 5.5.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor561 D24464 9073 9072 0x00004000 Call Trace: context_switch kernel/sched/core.c:3386 [inline] __schedule+0x87f/0xcd0 kernel/sched/core.c:4082 schedule+0x188/0x210 kernel/sched/core.c:4156 schedule_timeout+0x46/0x240 kernel/time/timer.c:1871 do_wait_for_common+0x2e7/0x4d0 kernel/sched/completion.c:83 __wait_for_common kernel/sched/completion.c:104 [inline] wait_for_common kernel/sched/completion.c:115 [inline] wait_for_completion+0x47/0x60 kernel/sched/completion.c:136 __flush_work kernel/workqueue.c:3041 [inline] __cancel_work_timer+0x4b7/0x630 kernel/workqueue.c:3128 cancel_delayed_work_sync+0x1a/0x20 kernel/workqueue.c:3260 tls_sw_cancel_work_tx+0x72/0x80 net/tls/tls_sw.c:2096 tls_sk_proto_close+0xd2/0x910 net/tls/tls_main.c:304 inet_release+0x165/0x1c0 net/ipv4/af_inet.c:427 inet6_release+0x57/0x70 net/ipv6/af_inet6.c:470 __sock_release net/socket.c:605 [inline] sock_close+0xe1/0x260 net/socket.c:1283 __fput+0x2e4/0x740 fs/file_table.c:280 ____fput+0x15/0x20 fs/file_table.c:313 task_work_run+0x176/0x1b0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop arch/x86/entry/common.c:164 [inline] prepare_exit_to_usermode+0x480/0x5b0 arch/x86/entry/common.c:195 syscall_return_slowpath+0x113/0x4a0 arch/x86/entry/common.c:278 do_syscall_64+0x11f/0x1c0 arch/x86/entry/common.c:304 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x402aa0 Code: 00 00 6e 05 00 00 12 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 2a 05 00 00 12 00 00 00 00 00 00 00 00 00 00 00 <00> 00 00 00 00 00 00 00 dd 05 00 00 12 00 00 00 00 00 00 00 00 00 RSP: 002b:00007ffe8d80bd08 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000402aa0 RDX: 00000000000000d8 RSI: 00000000200005c0 RDI: 0000000000000004 RBP: 0000000000000000 R08: 0000000000000000 R09: 00000000000000d8 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000403cd0 R14: 0000000000000000 R15: 0000000000000000 Showing all locks held in the system: 1 lock held by khungtaskd/1106: #0: ffffffff892d98c8 (rcu_read_lock){....}, at: rcu_lock_acquire+0x4/0x30 include/linux/rcupdate.h:207 3 locks held by kworker/0:16/2742: #0: ffff8880aa426d28 ((wq_completion)events){+.+.}, at: spin_unlock_irq include/linux/spinlock.h:388 [inline] #0: ffff8880aa426d28 ((wq_completion)events){+.+.}, at: process_one_work+0x763/0x10f0 kernel/workqueue.c:2237 #1: ffffc90007fcfd78 ((work_completion)(&(&sw_ctx_tx->tx_work.work)->work)){+.+.}, at: process_one_work+0x7a5/0x10f0 kernel/workqueue.c:2239 #2: ffff8880921f10d0 (&ctx->tx_lock){+.+.}, at: tx_work_handler+0x10d/0x150 net/tls/tls_sw.c:2209 2 locks held by rsyslogd/8958: #0: ffff888099f906a0 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x279/0x310 fs/file.c:821 #1: ffffffff89307a80 (fs_reclaim){+.+.}, at: __fs_reclaim_acquire+0x4/0x30 mm/page_alloc.c:4072 2 locks held by getty/9048: #0: ffff8880a8367090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:267 #1: ffffc900018232e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x22f/0x1bc0 drivers/tty/n_tty.c:2156 2 locks held by getty/9049: #0: ffff88809f16d090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:267 #1: ffffc900018332e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x22f/0x1bc0 drivers/tty/n_tty.c:2156 2 locks held by getty/9050: #0: ffff888094456090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:267 #1: ffffc900018132e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x22f/0x1bc0 drivers/tty/n_tty.c:2156 2 locks held by getty/9051: #0: ffff8880a2177090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:267 #1: ffffc900018532e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x22f/0x1bc0 drivers/tty/n_tty.c:2156 2 locks held by getty/9052: #0: ffff8880999c3090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:267 #1: ffffc900018432e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x22f/0x1bc0 drivers/tty/n_tty.c:2156 2 locks held by getty/9053: #0: ffff888097a81090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:267 #1: ffffc900018632e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x22f/0x1bc0 drivers/tty/n_tty.c:2156 2 locks held by getty/9054: #0: ffff8880a836a090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:267 #1: ffffc900017a32e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x22f/0x1bc0 drivers/tty/n_tty.c:2156 1 lock held by syz-executor561/9073: #0: ffff88808c93c240 (&sb->s_type->i_mutex_key#11){+.+.}, at: inode_lock include/linux/fs.h:791 [inline] #0: ffff88808c93c240 (&sb->s_type->i_mutex_key#11){+.+.}, at: __sock_release net/socket.c:604 [inline] #0: ffff88808c93c240 (&sb->s_type->i_mutex_key#11){+.+.}, at: sock_close+0x9e/0x260 net/socket.c:1283 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1106 Comm: khungtaskd Not tainted 5.5.0-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+0x1fb/0x318 lib/dump_stack.c:118 nmi_cpu_backtrace+0xaa/0x190 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x16f/0x290 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x10/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_all_cpu_backtrace+0x17/0x20 include/linux/nmi.h:146 check_hung_uninterruptible_tasks kernel/hung_task.c:205 [inline] watchdog+0xd40/0xd60 kernel/hung_task.c:289 kthread+0x332/0x350 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.5.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:___update_load_sum kernel/sched/pelt.c:208 [inline] RIP: 0010:update_irq_load_avg+0x301/0xa00 kernel/sched/pelt.c:407 Code: 74 12 4c 89 f7 e8 6f cc 59 00 49 b8 00 00 00 00 00 fc ff df 49 8b 06 4c 89 eb 48 29 c3 0f 88 e5 02 00 00 49 89 dd 49 c1 ed 0a <0f> 84 f8 02 00 00 48 81 e3 00 fc ff ff 48 01 c3 48 8b 45 c8 42 80 RSP: 0018:ffffc90000007c00 EFLAGS: 00000002 RAX: 0000005a48311c00 RBX: 00000000000005fb RCX: 0000000000000000 RDX: 1ffff11015d46fa3 RSI: 0000000000000002 RDI: ffff8880aea37d08 RBP: ffffc90000007c68 R08: dffffc0000000000 R09: 1ffff11015d46fa1 R10: ffffffff899f4010 R11: ffffffff899f4003 R12: ffff8880aea37180 R13: 0000000000000001 R14: ffff8880aea37d00 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 0000000095122000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: update_rq_clock_task kernel/sched/core.c:195 [inline] update_rq_clock+0x20c/0x430 kernel/sched/core.c:219 update_blocked_averages+0x76/0xf70 kernel/sched/fair.c:7670 _nohz_idle_balance+0x446/0x530 kernel/sched/fair.c:9997 nohz_idle_balance kernel/sched/fair.c:10048 [inline] run_rebalance_domains+0x165/0x290 kernel/sched/fair.c:10237 __do_softirq+0x283/0x7bd kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x227/0x230 kernel/softirq.c:413 scheduler_ipi+0x444/0x4a0 kernel/sched/core.c:2349 smp_reschedule_interrupt+0x7a/0xa0 arch/x86/kernel/smp.c:244 reschedule_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:853 RIP: 0010:native_safe_halt+0x12/0x20 arch/x86/include/asm/irqflags.h:61 Code: 89 d9 80 e1 07 80 c1 03 38 c1 7c ba 48 89 df e8 e4 05 9d f9 eb b0 cc cc 55 48 89 e5 e9 07 00 00 00 0f 00 2d 02 8d 4b 00 fb f4 <5d> c3 66 90 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 e9 07 00 00 RSP: 0018:ffffffff89207db8 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff02 RAX: 1ffffffff1255a5d RBX: ffffffff89275b00 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: ffffffff812c26da RDI: ffffffff89276344 RBP: ffffffff89207db8 R08: ffffffff89276358 R09: fffffbfff124eb61 R10: fffffbfff124eb61 R11: 0000000000000000 R12: 1ffffffff124eb60 R13: dffffc0000000000 R14: dffffc0000000000 R15: 1ffffffff1255a5b arch_safe_halt arch/x86/include/asm/paravirt.h:144 [inline] default_idle+0x50/0x70 arch/x86/kernel/process.c:695 arch_cpu_idle+0xa/0x10 arch/x86/kernel/process.c:686 default_idle_call+0x59/0xa0 kernel/sched/idle.c:94 cpuidle_idle_call kernel/sched/idle.c:154 [inline] do_idle+0x1ec/0x630 kernel/sched/idle.c:269 cpu_startup_entry+0x25/0x30 kernel/sched/idle.c:361 rest_init+0x29d/0x2b0 init/main.c:631 arch_call_rest_init+0xe/0x10 start_kernel+0x676/0x777 init/main.c:969 x86_64_start_reservations+0x18/0x2e arch/x86/kernel/head64.c:490 x86_64_start_kernel+0x7a/0x7d arch/x86/kernel/head64.c:471 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:242