syzbot

 kthread+0x421/0x510 kernel/kthread.c:337
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:299
 </TASK>
watchdog: BUG: soft lockup - CPU#0 stuck for 225s! [kworker/u4:3:321]
Modules linked in:
CPU: 0 PID: 321 Comm: kworker/u4:3 Not tainted 5.15.153-syzkaller-00623-gda92e689a0c3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:__sanitizer_cov_trace_pc+0x1/0x60 kernel/kcov.c:190
Code: 00 00 0f 0b 0f 1f 44 00 00 55 48 89 e5 53 48 89 fb e8 13 00 00 00 48 8b 3d f4 1a b9 05 48 89 de e8 24 7c 41 00 5b 5d c3 cc 55 <48> 89 e5 48 8b 45 08 65 48 8b 0d 90 22 92 7e 65 8b 15 91 22 92 7e
RSP: 0018:ffffc90005657830 EFLAGS: 00000202
RAX: 0000000000000000 RBX: 1ffff1103ee2784d RCX: ffff88810c17cf00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90005657958 R08: ffffffff8165a59a R09: ffffed103ee071d3
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000001
R13: ffff8881f713c268 R14: ffff8881f7038e80 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000100000000 CR3: 0000000006a0f000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 on_each_cpu_cond_mask+0x40/0x80 kernel/smp.c:1135
 on_each_cpu include/linux/smp.h:71 [inline]
 text_poke_sync arch/x86/kernel/alternative.c:1207 [inline]
 text_poke_bp_batch+0x1db/0x720 arch/x86/kernel/alternative.c:1407
 text_poke_flush arch/x86/kernel/alternative.c:1598 [inline]
 text_poke_finish+0x1a/0x30 arch/x86/kernel/alternative.c:1605
 arch_jump_label_transform_apply+0x15/0x30 arch/x86/kernel/jump_label.c:146
 __jump_label_update+0x36a/0x380 kernel/jump_label.c:459
 jump_label_update+0x3af/0x450 kernel/jump_label.c:830
 static_key_enable_cpuslocked+0x12f/0x250 kernel/jump_label.c:177
 static_key_enable+0x1a/0x30 kernel/jump_label.c:190
 toggle_allocation_gate+0xbf/0x460 mm/kfence/core.c:729
 process_one_work+0x6bb/0xc10 kernel/workqueue.c:2325
 worker_thread+0xad5/0x12a0 kernel/workqueue.c:2472
 kthread+0x421/0x510 kernel/kthread.c:337
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:299
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 386 Comm: syz.2.25 Not tainted 5.15.153-syzkaller-00623-gda92e689a0c3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
RIP: 0010:native_halt arch/x86/include/asm/irqflags.h:57 [inline]
RIP: 0010:halt arch/x86/include/asm/irqflags.h:98 [inline]
RIP: 0010:kvm_wait+0x117/0x180 arch/x86/kernel/kvm.c:912
Code: 48 c1 e8 03 42 0f b6 04 20 84 c0 44 8b 74 24 1c 75 53 41 0f b6 45 00 44 38 f0 0f 85 63 ff ff ff 66 90 0f 00 2d ea fc 12 04 f4 <e9> 54 ff ff ff fa 4c 89 e8 48 c1 e8 03 42 0f b6 04 20 84 c0 44 8b
RSP: 0018:ffffc900001d09a0 EFLAGS: 00000046
RAX: 0000000000000003 RBX: 1ffff9200003a138 RCX: ffffffff81550ddf
RDX: dffffc0000000000 RSI: 0000000000000003 RDI: ffff888119506040
RBP: ffffc900001d0a50 R08: dffffc0000000000 R09: ffffed10232a0c09
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff888119506040 R14: 0000000000000003 R15: 1ffff9200003a13c
FS:  0000555556293500(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000100000002 CR3: 000000010e45d000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 pv_wait arch/x86/include/asm/paravirt.h:597 [inline]
 pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:470 [inline]
 __pv_queued_spin_lock_slowpath+0x6bc/0xc40 kernel/locking/qspinlock.c:508
 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_flags include/linux/spinlock.h:199 [inline]
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:119 [inline]
 _raw_spin_lock_irqsave+0x1a0/0x210 kernel/locking/spinlock.c:162
 __lock_task_sighand kernel/signal.c:1413 [inline]
 lock_task_sighand include/linux/sched/signal.h:710 [inline]
 do_send_sig_info+0x7e/0x230 kernel/signal.c:1302
 group_send_sig_info+0x113/0x460 kernel/signal.c:1451
 do_bpf_send_signal+0x8c/0x150 kernel/trace/bpf_trace.c:779
 irq_work_single kernel/irq_work.c:155 [inline]
 irq_work_run_list+0x1c2/0x290 kernel/irq_work.c:177
 irq_work_run+0x69/0xf0 kernel/irq_work.c:186
 __sysvec_irq_work+0x63/0x1b0 arch/x86/kernel/irq_work.c:22
 sysvec_irq_work+0x41/0xb0 arch/x86/kernel/irq_work.c:17
 asm_sysvec_irq_work+0x1b/0x20 arch/x86/include/asm/idtentry.h:664
RIP: 0010:ffs arch/x86/include/asm/bitops.h:297 [inline]
RIP: 0010:__do_softirq+0x10e/0x5bf kernel/softirq.c:553
Code: a0 23 48 85 e8 73 6f bf ff 65 66 c7 05 09 6f e3 7a 00 00 48 c7 c7 a0 23 48 85 e8 5d 6f bf ff 65 89 1d ee 70 e2 7a fb 89 5d b8 <b8> ff ff ff ff 0f bc 45 b8 41 89 c4 41 ff c4 0f 85 c5 00 00 00 48
RSP: 0018:ffffc900001d0f70 EFLAGS: 00000286
RAX: 0000000000000001 RBX: 0000000000000200 RCX: ffff88810eb2bb40
RDX: 1ffffffff0e99608 RSI: ffffffff854823a0 RDI: ffffffff85a31680
RBP: ffffc900001d0fe8 R08: ffffffff874cb040 R09: ffffffff874cb048
R10: ffffffff874cb058 R11: ffffffff874cb050 R12: ffff88810eb2bb40
R13: dffffc0000000000 R14: 0000000000400040 R15: dffffc0000000000
 do_softirq+0xf6/0x150 kernel/softirq.c:452
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0x75/0x80 kernel/softirq.c:379
 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:176 [inline]
 _raw_spin_unlock_bh+0x51/0x60 kernel/locking/spinlock.c:210
 sock_hash_delete_elem+0x2a2/0x2f0 net/core/sock_map.c:945
 bpf_prog_586ab708469db861+0x41/0x924
 bpf_dispatcher_nop_func include/linux/bpf.h:785 [inline]
 __bpf_prog_run include/linux/filter.h:628 [inline]
 bpf_prog_run include/linux/filter.h:635 [inline]
 __bpf_trace_run kernel/trace/bpf_trace.c:1880 [inline]
 bpf_trace_run3+0x11e/0x250 kernel/trace/bpf_trace.c:1918
 __bpf_trace_kmem_cache_free+0x99/0xc0 include/trace/events/kmem.h:138
 __traceiter_kmem_cache_free+0x32/0x50 include/trace/events/kmem.h:138
 trace_kmem_cache_free include/trace/events/kmem.h:138 [inline]
 kmem_cache_free+0x2c3/0x2e0 mm/slub.c:3536
 __sigqueue_free kernel/signal.c:462 [inline]
 collect_signal kernel/signal.c:601 [inline]
 __dequeue_signal+0x4f8/0x600 kernel/signal.c:623
 dequeue_signal+0x10c/0x520 kernel/signal.c:643
 get_signal+0x7cf/0x1630 kernel/signal.c:2777
 arch_do_signal_or_restart+0xbd/0x1680 arch/x86/kernel/signal.c:867
 handle_signal_work kernel/entry/common.c:154 [inline]
 exit_to_user_mode_loop+0xa0/0xe0 kernel/entry/common.c:178
 exit_to_user_mode_prepare+0x5a/0xa0 kernel/entry/common.c:214
 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
 syscall_exit_to_user_mode+0x26/0x160 kernel/entry/common.c:307
 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7fe0327b0e79
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffe124a9d08 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 00007fe03294ea80 RCX: 00007fe0327b0e79
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007fe03294ea80 R08: 0000000000000006 R09: 00007ffe124a9fef
R10: 00000000005ef1b8 R11: 0000000000000246 R12: 000000000000611d
R13: 00007ffe124a9e00 R14: 00007ffe124a9e20 R15: ffffffffffffffff
 </TASK>