watchdog: BUG: soft lockup - CPU#0 stuck for 114s! [syz.9.6536:26435] Modules linked in: irq event stamp: 11250253 hardirqs last enabled at (11250252): [] irqentry_exit+0x5e8/0x670 kernel/entry/common.c:219 hardirqs last disabled at (11250253): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1056 softirqs last enabled at (5129558): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (5129558): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (5129558): [] __irq_exit_rcu+0x60/0x150 kernel/softirq.c:723 softirqs last disabled at (5129561): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (5129561): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (5129561): [] __irq_exit_rcu+0x60/0x150 kernel/softirq.c:723 CPU: 0 UID: 0 PID: 26435 Comm: syz.9.6536 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:rcu_lock_acquire include/linux/rcupdate.h:331 [inline] RIP: 0010:rcu_read_lock include/linux/rcupdate.h:867 [inline] RIP: 0010:class_rcu_constructor include/linux/rcupdate.h:1195 [inline] RIP: 0010:unwind_next_frame+0xc2/0x23d0 arch/x86/kernel/unwind_orc.c:495 Code: 00 e8 72 b1 33 00 4c 8d 3d 00 00 00 00 48 c7 c7 a0 1a f4 8d 31 f6 31 d2 b9 02 00 00 00 45 31 c0 45 31 c9 41 57 e8 9e f0 29 00 <48> 83 c4 08 e8 95 28 e6 09 85 c0 74 3a e8 ac ff 32 00 84 c0 75 31 RSP: 0018:ffffc900000075b0 EFLAGS: 00000286 RAX: 1bff952f3d9d9600 RBX: ffffffff8b5b5088 RCX: 0000000000000101 RDX: 0000000054904df0 RSI: ffffffff8d97773b RDI: ffffffff8bc08a60 RBP: dffffc0000000000 R08: ffffffff8173fdd5 R09: ffffffff8df41aa0 R10: ffffc90000007360 R11: ffffffff81acf4b0 R12: 1ffff92000000ed1 R13: ffffc900000076c0 R14: ffffc90000007688 R15: ffffffff8173fdd5 FS: 00007fb457ecf6c0(0000) GS:ffff888125e1e000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000559f8fc7d048 CR3: 0000000077394000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000200000000300 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: 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:57 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:78 unpoison_slab_object mm/kasan/common.c:340 [inline] __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:366 kasan_slab_alloc include/linux/kasan.h:253 [inline] slab_post_alloc_hook mm/slub.c:4953 [inline] slab_alloc_node mm/slub.c:5263 [inline] kmem_cache_alloc_node_noprof+0x43c/0x720 mm/slub.c:5315 kmalloc_reserve+0xbd/0x290 net/core/skbuff.c:586 __alloc_skb+0x204/0x3a0 net/core/skbuff.c:690 alloc_skb include/linux/skbuff.h:1383 [inline] new_skb+0x2f/0x2b0 drivers/block/aoe/aoecmd.c:66 aoecmd_cfg_pkts drivers/block/aoe/aoecmd.c:430 [inline] aoecmd_cfg+0x28b/0x7c0 drivers/block/aoe/aoecmd.c:1374 call_timer_fn+0x16e/0x590 kernel/time/timer.c:1748 expire_timers kernel/time/timer.c:1799 [inline] __run_timers kernel/time/timer.c:2373 [inline] __run_timer_base+0x61a/0x860 kernel/time/timer.c:2385 run_timer_base kernel/time/timer.c:2394 [inline] run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2404 handle_softirqs+0x22b/0x7c0 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0x60/0x150 kernel/softirq.c:723 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1056 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:preempt_schedule_irq+0x48/0xa0 kernel/sched/core.c:7190 Code: 49 be 00 00 00 00 00 fc ff df eb 09 48 f7 03 10 00 00 00 74 54 bf 01 00 00 00 e8 53 5b 35 f6 e8 3e 71 6d f6 fb bf 01 00 00 00 c3 a9 ff ff 9c 58 fa a9 00 02 00 00 74 05 e8 c4 72 6d f6 bf 01 RSP: 0018:ffffc9000410ebf8 EFLAGS: 00000206 RAX: 0000000000140c3f RBX: 0000000000000000 RCX: 0000000000000001 RDX: 0000000000000007 RSI: ffffffff8d793871 RDI: 0000000000000001 RBP: 0000000000000000 R08: ffffffff8f822a77 R09: 1ffffffff1f0454e R10: dffffc0000000000 R11: fffffbfff1f0454f R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000 irqentry_exit+0x5e3/0x670 kernel/entry/common.c:216 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:orc_ip arch/x86/kernel/unwind_orc.c:81 [inline] RIP: 0010:__orc_find arch/x86/kernel/unwind_orc.c:103 [inline] RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:238 [inline] RIP: 0010:unwind_next_frame+0x513/0x23d0 arch/x86/kernel/unwind_orc.c:510 Code: c1 e8 3f 48 01 c8 48 83 e0 fe 4c 8d 3c 45 00 00 00 00 49 01 ef 4c 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 <84> c0 75 27 49 63 07 4c 01 f8 49 8d 4f 04 4c 39 e0 48 0f 46 e9 49 RSP: 0018:ffffc9000410ed18 EFLAGS: 00000a02 RAX: 0000000000000000 RBX: ffffffff8f994620 RCX: dffffc0000000000 RDX: ffffffff8f994620 RSI: ffffffff9014e0be RDI: ffffffff8bc08a00 RBP: ffffffff8f994620 R08: 0000000000000001 R09: ffffffff8df41aa0 R10: ffffc9000410eac0 R11: ffffffffa0203c54 R12: ffffffff816a9eb3 R13: ffffffff8f994620 R14: ffffc9000410ee48 R15: ffffffff8f994620 __unwind_start+0x5b9/0x760 arch/x86/kernel/unwind_orc.c:773 unwind_start arch/x86/include/asm/unwind.h:64 [inline] arch_stack_walk+0xe4/0x150 arch/x86/kernel/stacktrace.c:24 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122 save_stack+0xf5/0x1f0 mm/page_owner.c:165 __reset_page_owner+0x71/0x1f0 mm/page_owner.c:320 reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1406 [inline] __free_frozen_pages+0xbc8/0xd30 mm/page_alloc.c:2943 discard_slab mm/slub.c:3346 [inline] __put_partials+0x146/0x170 mm/slub.c:3886 __slab_free+0x294/0x320 mm/slub.c:5952 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x97/0x100 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:350 kasan_slab_alloc include/linux/kasan.h:253 [inline] slab_post_alloc_hook mm/slub.c:4953 [inline] slab_alloc_node mm/slub.c:5263 [inline] __kmalloc_cache_node_noprof+0x409/0x700 mm/slub.c:5784 kmalloc_node_noprof include/linux/slab.h:983 [inline] __get_vm_area_node+0x13f/0x300 mm/vmalloc.c:3208 __vmalloc_node_range_noprof+0x371/0x16a0 mm/vmalloc.c:4011 __vmalloc_node_noprof mm/vmalloc.c:4111 [inline] vzalloc_noprof+0xb2/0xf0 mm/vmalloc.c:4189 bpf_check+0x19b/0x1c300 kernel/bpf/verifier.c:25189 bpf_prog_load+0x13ba/0x1a10 kernel/bpf/syscall.c:3086 __sys_bpf+0x5c3/0x8a0 kernel/bpf/syscall.c:6205 __do_sys_bpf kernel/bpf/syscall.c:6318 [inline] __se_sys_bpf kernel/bpf/syscall.c:6316 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:6316 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fb456f8f749 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:00007fb457ecf038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007fb4571e6180 RCX: 00007fb456f8f749 RDX: 0000000000000094 RSI: 00002000000000c0 RDI: 0000000000000005 RBP: 00007fb457013f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fb4571e6218 R14: 00007fb4571e6180 R15: 00007ffeb1e29eb8 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 11065 Comm: kworker/u8:18 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:csd_lock_wait kernel/smp.c:342 [inline] RIP: 0010:smp_call_function_many_cond+0xcc5/0x1260 kernel/smp.c:877 Code: 45 8b 2c 24 44 89 ee 83 e6 01 31 ff e8 d4 97 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 7f 93 0b 00 eb 38 f3 90 <42> 0f b6 04 2b 84 c0 75 11 41 f7 04 24 01 00 00 00 74 1e e8 63 93 RSP: 0018:ffffc90003f6f6a0 EFLAGS: 00000293 RAX: ffffffff81b5652d RBX: 1ffff110170c856d RCX: ffff88802677bd00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90003f6f7e0 R08: ffffffff8f822a77 R09: 1ffffffff1f0454e R10: dffffc0000000000 R11: fffffbfff1f0454f R12: ffff8880b8642b68 R13: dffffc0000000000 R14: ffff8880b873bb00 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff888125f1e000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffcf4c843c0 CR3: 000000000dd3a000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1043 on_each_cpu include/linux/smp.h:71 [inline] smp_text_poke_sync_each_cpu arch/x86/kernel/alternative.c:2711 [inline] smp_text_poke_batch_finish+0x5f9/0x1130 arch/x86/kernel/alternative.c:2921 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146 static_key_enable_cpuslocked+0x128/0x240 kernel/jump_label.c:210 static_key_enable+0x1a/0x20 kernel/jump_label.c:223 toggle_allocation_gate+0xad/0x240 mm/kfence/core.c:874 process_one_work kernel/workqueue.c:3257 [inline] process_scheduled_works+0xad1/0x1770 kernel/workqueue.c:3340 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3421 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x510/0xa50 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246