INFO: task syz-executor.5:22887 blocked for more than 143 seconds. Not tainted 5.3.0-rc3+ #92 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D29560 22887 10511 0x20024004 Call Trace: context_switch kernel/sched/core.c:3254 [inline] __schedule+0x755/0x1580 kernel/sched/core.c:3880 schedule+0xa8/0x270 kernel/sched/core.c:3944 exp_funnel_lock kernel/rcu/tree_exp.h:308 [inline] synchronize_rcu_expedited+0x544/0x5b0 kernel/rcu/tree_exp.h:816 synchronize_net+0x3b/0x60 net/core/dev.c:9259 packet_release+0x9cf/0xcb0 net/packet/af_packet.c:3033 __sock_release+0xce/0x280 net/socket.c:590 sock_close+0x1e/0x30 net/socket.c:1268 __fput+0x2ff/0x890 fs/file_table.c:280 ____fput+0x16/0x20 fs/file_table.c:313 task_work_run+0x145/0x1c0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x316/0x380 arch/x86/entry/common.c:163 prepare_exit_to_usermode arch/x86/entry/common.c:194 [inline] syscall_return_slowpath arch/x86/entry/common.c:274 [inline] do_syscall_32_irqs_on arch/x86/entry/common.c:347 [inline] do_fast_syscall_32+0xb87/0xdb3 arch/x86/entry/common.c:403 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139 RIP: 0023:0xf7ffaa29 Code: Bad RIP value. RSP: 002b:00000000f5dd50cc EFLAGS: 00000296 ORIG_RAX: 000000000000016e RAX: fffffffffffffff0 RBX: 0000000000000003 RCX: 0000000000000107 RDX: 000000000000000e RSI: 0000000020000100 RDI: 0000000000000004 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 INFO: lockdep is turned off. NMI backtrace for cpu 0 CPU: 0 PID: 1057 Comm: khungtaskd Not tainted 5.3.0-rc3+ #92 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+0x70/0xb2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x23b/0x28b 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:205 [inline] watchdog+0x9d0/0xef0 kernel/hung_task.c:289 kthread+0x361/0x430 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.3.0-rc3+ #92 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:apic_timer_interrupt+0x0/0x20 arch/x86/entry/entry_64.S:828 Code: 31 ff fc e8 b2 4f c0 f9 48 89 e7 e8 ca 91 c0 f9 e8 85 4f c0 f9 e9 e5 f2 ff ff c3 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <68> 13 ff ff ff e8 96 f1 ff ff e8 e1 2d 00 00 e9 8b f2 ff ff 66 90 RSP: 0018:ffff8880a98dfd38 EFLAGS: 00000086 RAX: 1ffffffff11a5e45 RBX: ffff8880a98c6340 RCX: 1ffffffff134b44e RDX: dffffc0000000000 RSI: ffffffff817805de RDI: ffffffff873d6a3c RBP: ffff8880a98dfd98 R08: ffff8880a98c6340 R09: ffffed1015318c69 R10: ffffed1015318c68 R11: ffff8880a98c6347 R12: dffffc0000000000 R13: ffffffff89a57078 R14: 0000000000000000 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 000000009cb0e000 CR4: 00000000001406e0 Call Trace: arch_cpu_idle+0xa/0x10 arch/x86/kernel/process.c:571 default_idle_call+0x84/0xb0 kernel/sched/idle.c:94 cpuidle_idle_call kernel/sched/idle.c:154 [inline] do_idle+0x413/0x760 kernel/sched/idle.c:263 cpu_startup_entry+0x1b/0x20 kernel/sched/idle.c:354 start_secondary+0x315/0x430 arch/x86/kernel/smpboot.c:264 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:241