RBP: 00007fa6546c847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007fa65479bf80 R15: 00007ffc02ba0b28 watchdog: BUG: soft lockup - CPU#0 stuck for 225s! [syz-executor.0:449] Modules linked in: CPU: 0 PID: 449 Comm: syz-executor.0 Not tainted 6.1.35-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023 RIP: 0010:native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline] RIP: 0010:arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline] RIP: 0010:kvm_wait+0x75/0x80 arch/x86/kernel/kvm.c:1066 Code: 75 14 0f b6 07 40 38 f0 75 ce 66 90 0f 00 2d 50 22 34 01 f4 eb c2 fa 0f b6 07 40 38 f0 75 0d 66 90 0f 00 2d 3b 22 34 01 fb f4 ac fb eb a9 e8 c1 7d e1 00 90 55 48 89 e5 53 48 63 c7 48 8b 04 RSP: 0018:ffffc90000787528 EFLAGS: 00000246 RAX: 0000000000000003 RBX: 0000000000040000 RCX: 0000000000000000 RDX: 0000000000000071 RSI: 0000000000000003 RDI: ffff88810c3872ac RBP: ffffc90000787538 R08: 0000000000000010 R09: ffff88810f3e1e20 R10: 0000000000000001 R11: 00000000ffffffff R12: ffff88823fff1740 R13: ffff88810c3872ac R14: ffff888237c20001 R15: ffff888237c2b600 FS: 00007fa6553fe6c0(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000200002c0 CR3: 0000000114c58000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: pv_wait arch/x86/include/asm/paravirt.h:603 [inline] pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:470 [inline] __pv_queued_spin_lock_slowpath+0x292/0x450 kernel/locking/qspinlock.c:511 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:591 [inline] queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:51 [inline] queued_spin_lock include/asm-generic/qspinlock.h:114 [inline] do_raw_spin_lock include/linux/spinlock.h:186 [inline] __raw_spin_lock_bh include/linux/spinlock_api_smp.h:127 [inline] _raw_spin_lock_bh+0x36/0x40 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:355 [inline] get_dist_table+0xa3/0xd0 net/sched/sch_netem.c:798 netem_change+0x377/0x7e0 net/sched/sch_netem.c:985 netem_init+0x36/0x60 net/sched/sch_netem.c:1072 qdisc_create+0x2f0/0x590 net/sched/sch_api.c:1314 tc_modify_qdisc+0x25e/0x7d0 rtnetlink_rcv_msg+0x2a6/0x460 net/core/rtnetlink.c:6097 netlink_rcv_skb+0xf4/0x120 net/netlink/af_netlink.c:2524 rtnetlink_rcv+0x10/0x20 net/core/rtnetlink.c:6115 netlink_unicast_kernel net/netlink/af_netlink.c:1328 [inline] netlink_unicast+0x288/0x380 net/netlink/af_netlink.c:1354 netlink_sendmsg+0x38b/0x420 net/netlink/af_netlink.c:1902 sock_sendmsg_nosec net/socket.c:716 [inline] sock_sendmsg net/socket.c:736 [inline] ____sys_sendmsg+0x181/0x220 net/socket.c:2482 ___sys_sendmsg+0x28f/0x2d0 net/socket.c:2536 __sys_sendmsg net/socket.c:2565 [inline] __do_sys_sendmsg net/socket.c:2574 [inline] __se_sys_sendmsg+0xf5/0x130 net/socket.c:2572 __x64_sys_sendmsg+0x18/0x20 net/socket.c:2572 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fa65467cae9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fa6553fe0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fa65479bf80 RCX: 00007fa65467cae9 RDX: 0000000000000000 RSI: 00000000200002c0 RDI: 0000000000000004 RBP: 00007fa6546c847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007fa65479bf80 R15: 00007ffc02ba0b28 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 451 Comm: kworker/u4:3 Not tainted 6.1.35-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:csd_lock_wait kernel/smp.c:442 [inline] RIP: 0010:smp_call_function_many_cond+0x2b9/0x2f0 kernel/smp.c:987 Code: 89 df e8 ca 27 47 00 39 05 1c 5d da 01 76 27 49 8b 0c 24 48 63 d0 48 8b 14 d5 00 28 cc 82 f7 44 0a 08 01 00 00 00 74 cb f3 90 <8b> 74 11 08 40 f6 c6 01 75 f4 eb bd 65 48 8b 04 25 28 00 00 00 48 RSP: 0018:ffffc9000078fc40 EFLAGS: 00000202 RAX: 0000000000000000 RBX: ffff888237d2ba08 RCX: 000000000002fe40 RDX: ffff888237c00000 RSI: 0000000000000011 RDI: ffff888237d2ba08 RBP: ffffc9000078fcc8 R08: 0000000000000000 R09: ffff888237d2ba10 R10: 0000000000000007 R11: 755f73746e657665 R12: ffff888237d2ba00 R13: 0000000000000001 R14: 0000000000000246 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fbd586c5000 CR3: 0000000002e0b000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: on_each_cpu_cond_mask+0x3b/0x70 kernel/smp.c:1155 on_each_cpu include/linux/smp.h:71 [inline] text_poke_sync arch/x86/kernel/alternative.c:1316 [inline] text_poke_bp_batch+0xab/0x270 arch/x86/kernel/alternative.c:1516 text_poke_flush arch/x86/kernel/alternative.c:1707 [inline] text_poke_finish+0x1a/0x30 arch/x86/kernel/alternative.c:1714 arch_jump_label_transform_apply+0x15/0x30 arch/x86/kernel/jump_label.c:146 __jump_label_update+0xc7/0xe0 kernel/jump_label.c:455 jump_label_update+0xd3/0xf0 kernel/jump_label.c:801 static_key_enable_cpuslocked kernel/jump_label.c:177 [inline] static_key_enable+0x3a/0x60 kernel/jump_label.c:190 toggle_allocation_gate+0x3d/0x220 mm/kfence/core.c:804 process_one_work+0x1b2/0x380 kernel/workqueue.c:2289 worker_thread+0x21f/0x380 kernel/workqueue.c:2436 kthread+0xda/0xf0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306