INFO: task syz-executor.4:13139 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.4 D28384 13139 7481 0x00004004 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 mark_held_locks+0xe0/0xe0 kernel/locking/lockdep.c:3620 lock_downgrade+0x840/0x840 kernel/locking/lockdep.c:4579 schedule+0xd0/0x2a0 kernel/sched/core.c:4158 schedule_timeout+0x55b/0x850 kernel/time/timer.c:1874 __wait_for_common kernel/sched/completion.c:105 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x8d/0x270 kernel/sched/completion.c:138 usleep_range+0x160/0x160 kernel/time/timer.c:2093 lock_downgrade+0x840/0x840 kernel/locking/lockdep.c:4579 atomic_try_cmpxchg include/asm-generic/atomic-instrumented.h:694 [inline] queued_spin_lock include/asm-generic/qspinlock.h:78 [inline] do_raw_spin_lock+0x129/0x2e0 kernel/locking/spinlock_debug.c:113 rwlock_bug.part.0+0x90/0x90 include/linux/sched.h:1329 rwlock_bug.part.0+0x90/0x90 include/linux/sched.h:1329 trace_hardirqs_on+0x55/0x220 kernel/trace/trace_preemptirq.c:31 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 rcu_preempt_deferred_qs_irqrestore+0x672/0xb60 kernel/rcu/tree_plugin.h:528 wait_for_completion_interruptible+0x2e0/0x2e0 kernel/sched/completion.c:89 rcu_read_unlock_special kernel/rcu/tree_plugin.h:647 [inline] __rcu_read_unlock+0x26c/0x700 kernel/rcu/tree_plugin.h:400 __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 lock_downgrade+0x840/0x840 kernel/locking/lockdep.c:4579 trace_hardirqs_off+0x50/0x220 kernel/trace/trace_preemptirq.c:45 try_to_grab_pending+0xee/0x8e0 kernel/workqueue.c:1248 __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 pgd_free+0x220/0x220 include/linux/list.h:135 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 INFO: lockdep is turned off. NMI backtrace for cpu 0 CPU: 0 PID: 1145 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: 4109 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:debug_smp_processor_id+0x2/0x185 lib/smp_processor_id.c:56 Code: c0 94 89 e8 10 27 17 fe e9 e3 fe ff ff 48 c7 c7 84 56 89 8a e8 ef 26 17 fe eb 87 0f 1f 00 66 2e 0f 1f 84 00 00 00 00 00 41 54 <53> e8 88 46 d9 fd 65 44 8b 25 f0 c3 67 7c 65 8b 1d 51 2f 68 7c 81 RSP: 0018:ffffc90001077970 EFLAGS: 00000082 RAX: 0000000000000007 RBX: 0000000000038740 RCX: 1ffffffff1512ad0 RDX: 0000000000000000 RSI: ffffc90001077f58 RDI: 00007ff242423840 RBP: 00007ff242423840 R08: ffffffff8b6c998e R09: ffffffff8b6c9992 R10: 0000000000156d2a R11: 000000000007001f R12: ffffc90001077aa0 R13: 0000000000000000 R14: ffff888093454280 R15: 0000000000000000 FS: 00007ff242e938c0(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff23ed7a000 CR3: 0000000093547000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_dynticks_curr_cpu_in_eqs+0x12/0xb0 kernel/rcu/tree.c:300 rcu_is_watching+0xc/0x20 kernel/rcu/tree.c:929 kernel_text_address+0x56/0xe0 kernel/extable.c:139 __kernel_text_address+0x9/0x30 kernel/extable.c:105 unwind_get_return_address arch/x86/kernel/unwind_orc.c:317 [inline] unwind_get_return_address+0x5a/0xa0 arch/x86/kernel/unwind_orc.c:312 profile_setup.cold+0xc1/0xc1 arch_stack_walk+0x97/0xf0 arch/x86/kernel/stacktrace.c:26 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:123 stack_trace_consume_entry+0x160/0x160 kernel/stacktrace.c:93 trace_hardirqs_off+0x50/0x220 kernel/trace/trace_preemptirq.c:45 mark_held_locks+0xe0/0xe0 kernel/locking/lockdep.c:3620 save_stack+0x1b/0x40 mm/kasan/common.c:49 save_stack+0x1b/0x40 mm/kasan/common.c:49 set_track mm/kasan/common.c:57 [inline] kasan_set_free_info mm/kasan/common.c:317 [inline] __kasan_slab_free+0xf7/0x140 mm/kasan/common.c:456 __cache_free mm/slab.c:3426 [inline] kmem_cache_free+0x7f/0x320 mm/slab.c:3694 putname+0xe1/0x120 fs/namei.c:259 do_sys_openat2+0x467/0x7d0 fs/open.c:1157 do_sys_open+0xc3/0x140 fs/open.c:1164 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 lock_acquire+0x1f2/0x8f0 kernel/locking/lockdep.c:4934 __debug_check_no_obj_freed lib/debugobjects.c:955 [inline] debug_check_no_obj_freed+0xc8/0x449 lib/debugobjects.c:998 do_filp_open+0x1b0/0x260 fs/namei.c:3378 lock_downgrade+0x840/0x840 kernel/locking/lockdep.c:4579 lock_acquire+0x1f2/0x8f0 kernel/locking/lockdep.c:4934 spin_lock include/linux/spinlock.h:353 [inline] put_unused_fd+0x4b/0x70 fs/file.c:565 trace_hardirqs_off+0x50/0x220 kernel/trace/trace_preemptirq.c:45 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline] _raw_spin_unlock_irqrestore+0x9b/0xe0 kernel/locking/spinlock.c:191 __debug_check_no_obj_freed lib/debugobjects.c:977 [inline] debug_check_no_obj_freed+0x213/0x449 lib/debugobjects.c:998 __phys_addr+0x9a/0x110 arch/x86/mm/physaddr.c:31 putname+0xe1/0x120 fs/namei.c:259 set_track mm/kasan/common.c:57 [inline] kasan_set_free_info mm/kasan/common.c:317 [inline] __kasan_slab_free+0xf7/0x140 mm/kasan/common.c:456 putname+0xe1/0x120 fs/namei.c:259 __cache_free mm/slab.c:3426 [inline] kmem_cache_free+0x7f/0x320 mm/slab.c:3694 putname+0xe1/0x120 fs/namei.c:259 do_sys_openat2+0x467/0x7d0 fs/open.c:1157 file_open_root+0x400/0x400 fs/open.c:1129 __secure_computing+0x104/0x360 kernel/seccomp.c:950 syscall_trace_enter+0x41d/0xd10 arch/x86/entry/common.c:130 do_sys_open+0xc3/0x140 fs/open.c:1164 filp_open+0x70/0x70 fs/open.c:1117 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: 0033:0x7ff242423840 Code: 73 01 c3 48 8b 0d 68 77 20 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d 89 bb 20 00 00 75 10 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 1e f6 ff ff 48 89 04 24 RSP: 002b:00007ffe1ebf3bd8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007ffe1ebf3ee0 RCX: 00007ff242423840 RDX: 00000000000001a0 RSI: 0000000000080042 RDI: 00005619fa0e5bd0 RBP: 000000000000000d R08: 000000000000c0c1 R09: 00000000ffffffff R10: 0000000000000069 R11: 0000000000000246 R12: 00000000ffffffff R13: 00005619fa0e0040 R14: 00007ffe1ebf3ea0 R15: 00005619fa0e5c20