INFO: task syz-executor.0:7799 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.0 D28120 7799 7243 0x00000004 Call Trace: context_switch kernel/sched/core.c:3366 [inline] __schedule+0x937/0x1ff0 kernel/sched/core.c:4082 __sched_text_start+0x8/0x8 mark_held_locks+0xe0/0xe0 kernel/locking/lockdep.c:3620 schedule+0xd0/0x2a0 kernel/sched/core.c:4157 schedule_timeout+0x55b/0x850 kernel/time/timer.c:1873 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:2092 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 __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:2668 __sock_release+0x280/0x280 net/socket.c:605 inet_release+0xe4/0x1f0 net/ipv4/af_inet.c:428 inet6_release+0x4c/0x70 net/ipv6/af_inet6.c:474 __sock_release+0xcd/0x280 net/socket.c:605 sock_close+0x18/0x20 net/socket.c:1278 __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/1144: #0: ffffffff899bea40 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:5754 1 lock held by in:imklog/6906: #0: ffff8880a3ac8670 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:826 3 locks held by kworker/0:1/11579: #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: ffffc90004797dc0 ((work_completion)(&(&sw_ctx_tx->tx_work.work)->work)){+.+.}-{0:0}, at: process_one_work+0x878/0x16a0 kernel/workqueue.c:2243 #2: ffff888091e4ecd8 (&ctx->tx_lock){+.+.}-{3:3}, at: tx_work_handler+0x127/0x190 net/tls/tls_sw.c:2212 1 lock held by syz-executor.0/7799: #0: ffff888044b80210 (&sb->s_type->i_mutex_key#14){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:797 [inline] #0: ffff888044b80210 (&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: 1144 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: 4300 Comm: systemd-journal Not tainted 5.7.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__list_del_entry_valid+0xc4/0xef lib/list_debug.c:61 Code: 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 22 49 8b 55 08 48 39 ea 0f 85 a8 00 00 00 5d b8 01 00 00 00 41 5c <41> 5d c3 e8 64 21 17 fe e9 56 ff ff ff e8 5a 21 17 fe eb d7 4c 89 RSP: 0018:ffffc90001637c40 EFLAGS: 00000046 RAX: 0000000000000001 RBX: ffffe8ffffd04f88 RCX: ffff8880a94f4a3f RDX: ffffea00012c7b88 RSI: ffffffff81339aaa RDI: ffff8880a94f4a48 RBP: ffff88821bc508c0 R08: ffff8880a90a81c0 R09: fffff520002c6f88 R10: ffff8880a94f4a00 R11: fffff520002c6f87 R12: ffff88804b1ee1d0 R13: ffff8880a94f4a40 R14: ffffea00012c7b80 R15: ffff8880a94f4a00 FS: 00007fb2793a98c0(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb27596f000 CR3: 0000000092f30000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __list_del_entry include/linux/list.h:132 [inline] list_del include/linux/list.h:146 [inline] free_block+0xd6/0x240 mm/slab.c:3344 cache_flusharray mm/slab.c:3397 [inline] ___cache_free+0x288/0x3a0 mm/slab.c:3457 qlink_free mm/kasan/quarantine.c:148 [inline] qlist_free_all+0x79/0x140 mm/kasan/quarantine.c:167 quarantine_reduce+0x135/0x170 mm/kasan/quarantine.c:260 __kasan_kmalloc.constprop.0+0x97/0xd0 mm/kasan/common.c:476 slab_post_alloc_hook mm/slab.h:586 [inline] slab_alloc mm/slab.c:3320 [inline] kmem_cache_alloc+0x11b/0x740 mm/slab.c:3484 getname_flags fs/namei.c:138 [inline] getname_flags+0xd2/0x5b0 fs/namei.c:128 getname fs/namei.c:209 [inline] user_path_create fs/namei.c:3502 [inline] do_mkdirat+0x8d/0x280 fs/namei.c:3640 __ia32_sys_mknod+0xb0/0xb0 fs/namei.c:3601 trace_hardirqs_off_caller+0x55/0x230 kernel/trace/trace_preemptirq.c:73 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x7fb278665687 Code: 00 b8 ff ff ff ff c3 0f 1f 40 00 48 8b 05 09 d8 2b 00 64 c7 00 5f 00 00 00 b8 ff ff ff ff c3 0f 1f 40 00 b8 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d e1 d7 2b 00 f7 d8 64 89 01 48 RSP: 002b:00007ffcae98d338 EFLAGS: 00000293 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffcae9903a0 RCX: 00007fb278665687 RDX: 0000000000000000 RSI: 00000000000001ed RDI: 0000560d19af88a0 RBP: 00007ffcae98d370 R08: 0000560d190f53e5 R09: 0000000000000018 R10: 0000000000000069 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000001 R14: 0000560d19af88a0 R15: 00007ffcae98d9b0