RBP: 00007f9382e63493 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcb738fe3f R14: 00007f938298b300 R15: 0000000000022000 watchdog: BUG: soft lockup - CPU#0 stuck for 246s! [syz-executor.0:435] Modules linked in: CPU: 0 PID: 435 Comm: syz-executor.0 Not tainted 5.15.118-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 RIP: 0010:arch_safe_halt arch/x86/include/asm/irqflags.h:90 [inline] RIP: 0010:kvm_wait arch/x86/kernel/kvm.c:918 [inline] RIP: 0010:kvm_wait+0x3e/0x40 arch/x86/kernel/kvm.c:900 Code: 0b fa 0f b6 07 40 38 f0 74 15 fb c3 0f b6 07 40 38 c6 75 f7 66 90 0f 00 2d 7d 04 35 01 f4 c3 66 90 0f 00 2d 72 04 35 01 fb f4 90 8b 05 aa 39 f7 01 83 f8 ff 74 06 85 c0 0f 95 c0 c3 55 48 89 RSP: 0018:ffffc9000038b7b8 EFLAGS: 00000246 RAX: 0000000000000003 RBX: ffff888237c2b6c0 RCX: 0000000000000008 RDX: 0000000000000000 RSI: 0000000000000003 RDI: ffff8881081d94ac RBP: ffffc9000038b7f8 R08: ffff88823fff1d00 R09: 0000000000000000 R10: 0000000000000001 R11: ffff888237c2b6c0 R12: ffff8881081d94ac R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000100 FS: 00007f938298b700(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000080 CR3: 0000000101992000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:585 [inline] queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:51 [inline] queued_spin_lock include/asm-generic/qspinlock.h:85 [inline] do_raw_spin_lock include/linux/spinlock.h:187 [inline] __raw_spin_lock_bh include/linux/spinlock_api_smp.h:136 [inline] _raw_spin_lock_bh+0x39/0x40 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:368 [inline] get_dist_table+0x92/0xd0 net/sched/sch_netem.c:798 netem_change+0xf8/0x610 net/sched/sch_netem.c:988 netem_init+0x41/0x60 net/sched/sch_netem.c:1075 qdisc_create+0x13f/0x590 net/sched/sch_api.c:1264 tc_modify_qdisc+0x13c/0x9c0 net/sched/sch_api.c:1689 rtnetlink_rcv_msg+0x13e/0x380 net/core/rtnetlink.c:5593 netlink_rcv_skb+0x4e/0xf0 net/netlink/af_netlink.c:2504 rtnetlink_rcv+0x10/0x20 net/core/rtnetlink.c:5611 netlink_unicast_kernel net/netlink/af_netlink.c:1330 [inline] netlink_unicast+0x252/0x350 net/netlink/af_netlink.c:1356 netlink_sendmsg+0x241/0x490 net/netlink/af_netlink.c:1923 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg+0x35/0x40 net/socket.c:724 ____sys_sendmsg+0x23e/0x260 net/socket.c:2412 ___sys_sendmsg+0x74/0xc0 net/socket.c:2466 __sys_sendmsg+0x5d/0xb0 net/socket.c:2495 __do_sys_sendmsg net/socket.c:2504 [inline] __se_sys_sendmsg net/socket.c:2502 [inline] __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2502 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+0x61/0xcb RIP: 0033:0x7f9382e18389 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f938298b168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f9382f37f80 RCX: 00007f9382e18389 RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000003 RBP: 00007f9382e63493 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcb738fe3f R14: 00007f938298b300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 11 Comm: kworker/u4:1 Not tainted 5.15.118-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:csd_lock_wait kernel/smp.c:440 [inline] RIP: 0010:smp_call_function_many_cond+0xcc/0x260 kernel/smp.c:969 Code: 48 89 de e8 a6 34 47 00 3b 05 54 b0 03 02 89 c7 73 21 48 63 c7 49 8b 14 24 48 03 14 c5 80 18 d7 82 8b 42 08 a8 01 74 09 f3 90 <8b> 42 08 a8 01 75 f7 eb cd 48 83 c4 48 5b 41 5c 41 5d 41 5e 41 5f RSP: 0018:ffffc9000005fc68 EFLAGS: 00000202 RAX: 0000000000000011 RBX: ffff888237d2bb08 RCX: 0000000000000000 RDX: ffff888237c30360 RSI: ffff888237d2bb08 RDI: 0000000000000000 RBP: ffffc9000005fcd8 R08: 0000000000000000 R09: 8000000000000063 R10: 0000000000000000 R11: 0000000000000002 R12: ffff888237d2bb00 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa74bbdb7c0 CR3: 000000000300b000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: on_each_cpu_cond_mask+0x44/0x80 kernel/smp.c:1135 on_each_cpu include/linux/smp.h:71 [inline] text_poke_sync arch/x86/kernel/alternative.c:1183 [inline] text_poke_bp_batch+0xa0/0x1f0 arch/x86/kernel/alternative.c:1374 text_poke_flush arch/x86/kernel/alternative.c:1542 [inline] text_poke_finish+0x1a/0x30 arch/x86/kernel/alternative.c:1549 arch_jump_label_transform_apply+0x15/0x30 arch/x86/kernel/jump_label.c:146 __jump_label_update+0xe4/0xf0 kernel/jump_label.c:459 jump_label_update+0xd7/0x100 kernel/jump_label.c:830 static_key_disable_cpuslocked kernel/jump_label.c:207 [inline] static_key_disable_cpuslocked+0x54/0x60 kernel/jump_label.c:195 static_key_disable+0x16/0x30 kernel/jump_label.c:215 toggle_allocation_gate mm/kfence/core.c:743 [inline] toggle_allocation_gate+0x93/0x190 mm/kfence/core.c:721 process_one_work+0x199/0x340 kernel/workqueue.c:2307 worker_thread+0x4e/0x340 kernel/workqueue.c:2454 kthread+0x13a/0x160 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298