watchdog: BUG: soft lockup - CPU#1 stuck for 143s! [syz.2.250:7735] Modules linked in: irq event stamp: 10872289 hardirqs last enabled at (10872288): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:357 hardirqs last disabled at (10872289): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1049 softirqs last enabled at (6993096): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (6993096): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (6993096): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 softirqs last disabled at (6993099): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (6993099): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (6993099): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 CPU: 1 UID: 0 PID: 7735 Comm: syz.2.250 Not tainted 6.15.0-rc3-syzkaller-g91dbac407653 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 RIP: 0010:perf_trace_buf_alloc+0x21/0x2a0 kernel/trace/trace_event_perf.c:405 Code: 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 41 57 41 56 41 55 41 54 53 50 49 89 d7 49 89 f6 89 fb e8 14 a3 f6 ff bf 00 20 00 00 <89> de e8 48 a7 f6 ff 81 fb 01 20 00 00 7c 1a 80 3d 9b 99 9f 0d 01 RSP: 0018:ffffc90000a08000 EFLAGS: 00000246 RAX: ffffffff81c91a6c RBX: 000000000000002c RCX: ffff888024d65a00 RDX: 0000000000000100 RSI: ffffc90000a080a0 RDI: 0000000000002000 RBP: ffffc90000a08138 R08: 0000000000000002 R09: 0000000000000000 R10: 0000000000000000 R11: ffffffff81aca920 R12: 1ffff92000141010 R13: 000000000000000d R14: ffffc90000a080a0 R15: ffffc90000a080c0 FS: 00007f501b2696c0(0000) GS:ffff8881261d0000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000004 CR3: 000000007cf32000 CR4: 00000000003526f0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: do_perf_trace_lock_acquire include/trace/events/lock.h:24 [inline] perf_trace_lock_acquire+0x196/0x410 include/trace/events/lock.h:24 __do_trace_lock_acquire include/trace/events/lock.h:24 [inline] trace_lock_acquire include/trace/events/lock.h:24 [inline] lock_acquire+0x311/0x360 kernel/locking/lockdep.c:5829 rcu_lock_acquire include/linux/rcupdate.h:331 [inline] rcu_read_lock include/linux/rcupdate.h:841 [inline] class_rcu_constructor include/linux/rcupdate.h:1155 [inline] unwind_next_frame+0xc2/0x2390 arch/x86/kernel/unwind_orc.c:479 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:319 [inline] __kasan_mempool_unpoison_object+0xa5/0x170 mm/kasan/common.c:547 kasan_mempool_unpoison_object include/linux/kasan.h:388 [inline] napi_skb_cache_get+0x37b/0x6d0 net/core/skbuff.c:293 __alloc_skb+0x11e/0x2d0 net/core/skbuff.c:656 napi_alloc_skb+0x84/0x7d0 net/core/skbuff.c:810 page_to_skb+0x233/0x8d0 drivers/net/virtio_net.c:840 receive_mergeable drivers/net/virtio_net.c:2430 [inline] receive_buf+0x302/0x1580 drivers/net/virtio_net.c:2568 virtnet_receive_packets drivers/net/virtio_net.c:2926 [inline] virtnet_receive drivers/net/virtio_net.c:2950 [inline] virtnet_poll+0x1f9b/0x2d70 drivers/net/virtio_net.c:3045 __napi_poll+0xc4/0x480 net/core/dev.c:7324 napi_poll net/core/dev.c:7388 [inline] net_rx_action+0x6ea/0xdf0 net/core/dev.c:7510 handle_softirqs+0x283/0x870 kernel/softirq.c:579 __do_softirq kernel/softirq.c:613 [inline] invoke_softirq kernel/softirq.c:453 [inline] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:schedule_debug kernel/sched/core.c:5948 [inline] RIP: 0010:__schedule+0x1a7/0x4cd0 kernel/sched/core.c:6666 Code: 74 08 48 89 df e8 89 b8 cb f6 48 8b 1b 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 70 b8 cb f6 48 81 3b 9d 6e ac 57 <0f> 85 10 18 00 00 83 7c 24 68 00 7f 42 49 8d 5e 18 48 89 d8 48 c1 RSP: 0018:ffffc9000bac7340 EFLAGS: 00000246 RAX: 1ffff92001758000 RBX: ffffc9000bac0000 RCX: 6435a315b7de6700 RDX: 0000000000000000 RSI: ffffffff8bc1c780 RDI: ffffffff8bc1c740 RBP: ffffc9000bac7550 R08: ffffffff8f7ebb77 R09: 1ffffffff1efd76e R10: dffffc0000000000 R11: fffffbfff1efd76f R12: ffff8880b893a640 R13: dffffc0000000000 R14: ffff888024d65a00 R15: ffff8881261d0000 preempt_schedule_notrace+0xd1/0x110 kernel/sched/core.c:7040 preempt_schedule_notrace_thunk+0x16/0x30 arch/x86/entry/thunk.S:13 class_preempt_notrace_destructor include/linux/preempt.h:482 [inline] __do_trace_lock_acquire include/trace/events/lock.h:24 [inline] trace_lock_acquire include/trace/events/lock.h:24 [inline] lock_acquire+0x347/0x360 kernel/locking/lockdep.c:5829 rcu_lock_acquire include/linux/rcupdate.h:331 [inline] rcu_read_lock include/linux/rcupdate.h:841 [inline] is_bpf_text_address+0x47/0x2b0 kernel/bpf/core.c:772 kernel_text_address+0xa5/0xe0 kernel/extable.c:125 __kernel_text_address+0xd/0x40 kernel/extable.c:79 unwind_get_return_address+0x4d/0x90 arch/x86/kernel/unwind_orc.c:369 arch_stack_walk+0xfc/0x150 arch/x86/kernel/stacktrace.c:26 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:576 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x62/0x70 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:233 [inline] slab_free_hook mm/slub.c:2398 [inline] slab_free mm/slub.c:4656 [inline] kfree+0x193/0x440 mm/slub.c:4855 tomoyo_realpath_from_path+0x598/0x5d0 security/tomoyo/realpath.c:286 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path_number_perm+0x1e8/0x5a0 security/tomoyo/file.c:723 security_file_ioctl+0xcb/0x2d0 security/security.c:2913 __do_sys_ioctl fs/ioctl.c:900 [inline] __se_sys_ioctl+0x47/0x170 fs/ioctl.c:892 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f501a38e969 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:00007f501b269038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f501a5b6080 RCX: 00007f501a38e969 RDX: 000000000000000b RSI: 0000000040042408 RDI: 000000000000000a RBP: 00007f501a410ab1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f501a5b6080 R15: 00007ffde1c41918 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 6320 Comm: kworker/u8:13 Not tainted 6.15.0-rc3-syzkaller-g91dbac407653 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:csd_lock_wait kernel/smp.c:340 [inline] RIP: 0010:smp_call_function_many_cond+0xe69/0x11c0 kernel/smp.c:885 Code: 00 45 8b 2f 44 89 ee 83 e6 01 31 ff e8 20 6d 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 cb 68 0b 00 eb 37 f3 90 <43> 0f b6 04 2c 84 c0 75 10 41 f7 07 01 00 00 00 74 1e e8 b0 68 0b RSP: 0018:ffffc9000331f700 EFLAGS: 00000293 RAX: ffffffff81b454d0 RBX: ffff8880b883ad40 RCX: ffff88807e19da00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc9000331f860 R08: ffffffff8f7ebb77 R09: 1ffffffff1efd76e R10: dffffc0000000000 R11: fffffbfff1efd76f R12: 1ffff11017127e99 R13: dffffc0000000000 R14: 0000000000000001 R15: ffff8880b893f4c8 FS: 0000000000000000(0000) GS:ffff8881260d0000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff86e32a020 CR3: 000000000dd36000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1052 on_each_cpu include/linux/smp.h:71 [inline] text_poke_sync arch/x86/kernel/alternative.c:2455 [inline] text_poke_bp_batch+0x319/0x940 arch/x86/kernel/alternative.c:2665 text_poke_flush arch/x86/kernel/alternative.c:2856 [inline] text_poke_finish+0x30/0x50 arch/x86/kernel/alternative.c:2863 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146 static_key_disable_cpuslocked+0xc5/0x1b0 kernel/jump_label.c:240 static_key_disable+0x1a/0x20 kernel/jump_label.c:248 toggle_allocation_gate+0x1a1/0x240 mm/kfence/core.c:855 process_one_work kernel/workqueue.c:3238 [inline] process_scheduled_works+0xadb/0x17a0 kernel/workqueue.c:3319 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400 kthread+0x70e/0x8a0 kernel/kthread.c:464 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245