INFO: task syz-executor.2:10515 blocked for more than 144 seconds. Not tainted 6.0.0-syzkaller-07994-ge8bc52cb8df8 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:28736 pid:10515 ppid: 3635 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5183 [inline] __schedule+0xadf/0x52b0 kernel/sched/core.c:6495 schedule+0xda/0x1b0 kernel/sched/core.c:6571 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1911 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common+0x1be/0x530 kernel/sched/completion.c:106 __flush_work+0x58d/0xae0 kernel/workqueue.c:3073 __cancel_work_timer+0x3f9/0x570 kernel/workqueue.c:3160 p9_conn_destroy net/9p/trans_fd.c:885 [inline] p9_fd_close+0x29c/0x580 net/9p/trans_fd.c:920 p9_client_create+0x97a/0x1070 net/9p/client.c:1001 v9fs_session_init+0x1e2/0x1810 fs/9p/v9fs.c:408 v9fs_mount+0xba/0xc90 fs/9p/vfs_super.c:126 legacy_get_tree+0x105/0x220 fs/fs_context.c:610 vfs_get_tree+0x89/0x2f0 fs/super.c:1530 do_new_mount fs/namespace.c:3040 [inline] path_mount+0x1326/0x1e20 fs/namespace.c:3370 do_mount fs/namespace.c:3383 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount fs/namespace.c:3568 [inline] __x64_sys_mount+0x27f/0x300 fs/namespace.c:3568 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fe7a388a5a9 RSP: 002b:00007fe7a496f168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fe7a39ac050 RCX: 00007fe7a388a5a9 RDX: 00000000200001c0 RSI: 0000000020000180 RDI: 0000000000000000 RBP: 00007fe7a38e5580 R08: 0000000020000200 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff06ace9ff R14: 00007fe7a496f300 R15: 0000000000022000 INFO: lockdep is turned off. NMI backtrace for cpu 1 CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.0.0-syzkaller-07994-ge8bc52cb8df8 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 nmi_cpu_backtrace.cold+0x46/0x14f lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x206/0x250 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline] watchdog+0xc18/0xf50 kernel/hung_task.c:369 kthread+0x2e4/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 3909 Comm: kworker/u4:7 Not tainted 6.0.0-syzkaller-07994-ge8bc52cb8df8 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:native_apic_mem_read arch/x86/include/asm/apic.h:112 [inline] RIP: 0010:__xapic_wait_icr_idle arch/x86/kernel/apic/ipi.c:107 [inline] RIP: 0010:__default_send_IPI_dest_field+0x2e/0x130 arch/x86/kernel/apic/ipi.c:156 Code: fc 55 53 89 d3 48 83 ec 08 83 fe 02 74 73 a0 60 f8 eb ff ff fb ff ff 84 c0 74 08 3c 03 0f 8e a8 00 00 00 8b 04 25 00 c3 5f ff <48> bd 60 f8 eb ff ff fb ff ff f6 c4 10 74 1e f3 90 0f b6 45 00 84 RSP: 0018:ffffc900057df898 EFLAGS: 00000046 RAX: 00000000000008fb RBX: 0000000000000800 RCX: 0000000000000000 RDX: 0000000000000800 RSI: 00000000000000fb RDI: 0000000000000002 RBP: 1ffff92000afbf1c R08: 0000000000000005 R09: 0000000000000001 R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000002 R13: ffffc900057df900 R14: 0000000000000008 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2e94e000 CR3: 000000000bc8e000 CR4: 0000000000350ef0 Call Trace: _flat_send_IPI_mask+0x4e/0x60 arch/x86/kernel/apic/apic_flat_64.c:56 arch_send_call_function_single_ipi arch/x86/include/asm/smp.h:109 [inline] send_call_function_single_ipi+0x1b5/0x320 kernel/sched/core.c:3757 smp_call_function_many_cond+0x111e/0x1420 kernel/smp.c:967 on_each_cpu_cond_mask+0x56/0xa0 kernel/smp.c:1153 on_each_cpu include/linux/smp.h:71 [inline] text_poke_sync arch/x86/kernel/alternative.c:1311 [inline] text_poke_bp_batch+0x3f1/0x6b0 arch/x86/kernel/alternative.c:1555 text_poke_flush arch/x86/kernel/alternative.c:1670 [inline] text_poke_flush arch/x86/kernel/alternative.c:1667 [inline] text_poke_finish+0x16/0x30 arch/x86/kernel/alternative.c:1677 arch_jump_label_transform_apply+0x13/0x20 arch/x86/kernel/jump_label.c:146 jump_label_update+0x32f/0x410 kernel/jump_label.c:801 static_key_enable_cpuslocked+0x1b1/0x260 kernel/jump_label.c:177 static_key_enable+0x16/0x20 kernel/jump_label.c:190 toggle_allocation_gate mm/kfence/core.c:811 [inline] toggle_allocation_gate+0x100/0x390 mm/kfence/core.c:803 process_one_work+0x991/0x1610 kernel/workqueue.c:2289 worker_thread+0x665/0x1080 kernel/workqueue.c:2436 kthread+0x2e4/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306