watchdog: BUG: soft lockup - CPU#0 stuck for 122s! [syz.4.5:5933] Modules linked in: irq event stamp: 14989921 hardirqs last enabled at (14989920): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:357 hardirqs last disabled at (14989921): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1049 softirqs last enabled at (14740482): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (14740482): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (14740482): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 softirqs last disabled at (14740485): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (14740485): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (14740485): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 CPU: 0 UID: 0 PID: 5933 Comm: syz.4.5 Not tainted 6.15.0-rc4-syzkaller-g079e5c56a5c4 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:__asan_memset+0xd/0x50 mm/kasan/shadow.c:83 Code: ff 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 41 56 53 48 89 d3 89 f5 <49> 89 fe 48 8b 4c 24 18 48 89 d6 ba 01 00 00 00 e8 de e5 ff ff 84 RSP: 0018:ffffc90000007340 EFLAGS: 00000246 RAX: 000000000000002c RBX: 0000000000000008 RCX: ffff888029c89e00 RDX: 0000000000000008 RSI: 0000000000000000 RDI: ffffe8ffffc8e024 RBP: 0000000000000000 R08: ffffc90000007950 R09: 0000000000000000 R10: ffffc90000007638 R11: fffff52000000ec9 R12: ffffffff8d96ec10 R13: dffffc0000000000 R14: ffffe8ffffc8e000 R15: ffffffff8d96ec10 FS: 00007f0f0bff66c0(0000) GS:ffff8881260c9000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005634f3c01168 CR3: 0000000024248000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: perf_trace_buf_alloc+0x1d5/0x2a0 kernel/trace/trace_event_perf.c:419 do_perf_trace_lock include/trace/events/lock.h:50 [inline] perf_trace_lock+0x18d/0x3b0 include/trace/events/lock.h:50 __do_trace_lock_release include/trace/events/lock.h:69 [inline] trace_lock_release include/trace/events/lock.h:69 [inline] lock_release+0x3b2/0x3e0 kernel/locking/lockdep.c:5877 rcu_lock_release include/linux/rcupdate.h:341 [inline] rcu_read_unlock include/linux/rcupdate.h:871 [inline] class_rcu_destructor include/linux/rcupdate.h:1155 [inline] unwind_next_frame+0x19a9/0x2390 arch/x86/kernel/unwind_orc.c:680 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_slab_alloc+0x6c/0x80 mm/kasan/common.c:345 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4161 [inline] slab_alloc_node mm/slub.c:4210 [inline] kmem_cache_alloc_node_noprof+0x1bb/0x3c0 mm/slub.c:4262 __alloc_skb+0x112/0x2d0 net/core/skbuff.c:658 alloc_skb include/linux/skbuff.h:1340 [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:1370 call_timer_fn+0x17b/0x5f0 kernel/time/timer.c:1789 expire_timers kernel/time/timer.c:1840 [inline] __run_timers kernel/time/timer.c:2414 [inline] __run_timer_base+0x61a/0x860 kernel/time/timer.c:2426 run_timer_base kernel/time/timer.c:2435 [inline] run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2445 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_irq_work arch/x86/kernel/irq_work.c:17 [inline] sysvec_irq_work+0xa3/0xc0 arch/x86/kernel/irq_work.c:17 asm_sysvec_irq_work+0x1a/0x20 arch/x86/include/asm/idtentry.h:738 RIP: 0010:lock_is_held_type+0x137/0x190 kernel/locking/lockdep.c:5943 Code: 01 75 44 48 c7 04 24 00 00 00 00 9c 8f 04 24 f7 04 24 00 02 00 00 75 4c 41 f7 c4 00 02 00 00 74 01 fb 65 48 8b 05 89 54 1f 07 <48> 3b 44 24 08 75 43 89 d8 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f RSP: 0018:ffffc9000444f258 EFLAGS: 00000206 RAX: 1973888a82980600 RBX: 0000000000000000 RCX: 1973888a82980600 RDX: 0000000000000000 RSI: ffffffff8d935ea9 RDI: ffffffff8bc1d460 RBP: 00000000ffffffff R08: ffffffff8f7ed377 R09: 1ffffffff1efda6e R10: dffffc0000000000 R11: fffffbfff1efda6f R12: 0000000000000246 R13: ffff888029c89e00 R14: ffffffff8df3b8c0 R15: 0000000000000001 lock_is_held include/linux/lockdep.h:249 [inline] schedule_debug kernel/sched/core.c:5968 [inline] __schedule+0x225/0x4cd0 kernel/sched/core.c:6666 preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7090 irqentry_exit+0x6f/0x90 kernel/entry/common.c:354 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:_compound_head include/linux/page-flags.h:282 [inline] RIP: 0010:virt_to_folio include/linux/mm.h:1404 [inline] RIP: 0010:virt_to_slab mm/slab.h:211 [inline] RIP: 0010:qlink_to_cache mm/kasan/quarantine.c:131 [inline] RIP: 0010:qlist_free_all+0x4a/0x140 mm/kasan/quarantine.c:176 Code: 00 00 00 00 00 ea ff ff 31 ed 49 89 df 4d 89 f4 4d 85 f6 75 38 4c 89 ff e8 43 21 51 ff 48 c1 e8 06 48 83 e0 c0 4a 8b 4c 28 08 c1 01 0f 85 ad 00 00 00 4c 01 e8 66 90 0f b6 48 33 c1 e1 18 81 RSP: 0018:ffffc9000444f620 EFLAGS: 00000202 RAX: 0000000001f8a940 RBX: ffff88807e2a5500 RCX: ffffea0001f8a801 RDX: ffffc9000d9ae000 RSI: 00000000000053b0 RDI: 00000000000053b1 RBP: 0000000000000000 R08: 0000000000000018 R09: ffff8880277fdf80 R10: 0000000000000000 R11: fffffbfff1efda6f R12: 0000000000000000 R13: ffffea0000000000 R14: 0000000000000000 R15: ffff88807e2a5500 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4161 [inline] slab_alloc_node mm/slub.c:4210 [inline] __kmalloc_cache_node_noprof+0x1c0/0x3d0 mm/slub.c:4380 kmalloc_node_noprof include/linux/slab.h:928 [inline] page_pool_create_percpu+0x76/0xba0 net/core/page_pool.c:344 xdp_test_run_setup net/bpf/test_run.c:182 [inline] bpf_test_run_xdp_live+0x1cd/0x1aa0 net/bpf/test_run.c:383 bpf_prog_test_run_xdp+0x713/0xf90 net/bpf/test_run.c:1322 bpf_prog_test_run+0x2a9/0x340 kernel/bpf/syscall.c:4429 __sys_bpf+0x4a4/0x860 kernel/bpf/syscall.c:5854 __do_sys_bpf kernel/bpf/syscall.c:5943 [inline] __se_sys_bpf kernel/bpf/syscall.c:5941 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5941 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: 0033:0x7f0f0e18e969 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:00007f0f0bff6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f0f0e3b6080 RCX: 00007f0f0e18e969 RDX: 0000000000000050 RSI: 0000200000000600 RDI: 000000000000000a RBP: 00007f0f0e210ab1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f0f0e3b6080 R15: 00007ffdfd2690e8 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 5955 Comm: kworker/u8:13 Not tainted 6.15.0-rc4-syzkaller-g079e5c56a5c4 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 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:ffffc9000453f700 EFLAGS: 00000293 RAX: ffffffff81b45620 RBX: ffff8880b893ad40 RCX: ffff888064a3da00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc9000453f860 R08: ffffffff8f7ed377 R09: 1ffffffff1efda6e R10: dffffc0000000000 R11: fffffbfff1efda6f R12: 1ffff11017108245 R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8880b8841228 FS: 0000000000000000(0000) GS:ffff8881261c9000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005634f3c26fb0 CR3: 000000000dd36000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 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