watchdog: BUG: soft lockup - CPU#0 stuck for 143s! [syz.2.44:6054] Modules linked in: irq event stamp: 13267151 hardirqs last enabled at (13267150): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:310 hardirqs last disabled at (13267151): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1050 softirqs last enabled at (1870): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (1870): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (1870): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 softirqs last disabled at (3187): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (3187): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (3187): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 CPU: 0 UID: 0 PID: 6054 Comm: syz.2.44 Not tainted 6.15.0-syzkaller-gcd2e103d57e5 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:trace_call_bpf+0x76/0x850 kernel/trace/bpf_trace.c:114 Code: fb 8e b4 8d 48 c7 44 24 70 a0 5d cb 81 4c 8d 6c 24 60 49 c1 ed 03 48 b8 f1 f1 f1 f1 00 00 f3 f3 49 89 44 0d 00 e8 ca dc f4 ff <48> c7 c7 60 51 90 8b be 72 00 00 00 31 d2 e8 c7 03 c7 ff 48 c7 c7 RSP: 0018:ffffc900000070e0 EFLAGS: 00000246 RAX: ffffffff81cb5e16 RBX: 0000000000000001 RCX: ffff88802aa4bc00 RDX: 0000000000000100 RSI: ffffe8ffffc82000 RDI: ffffffff8e00bfe0 RBP: ffffc900000071d8 R08: 0000000000000001 R09: ffff8880b8632a08 R10: dffffc0000000000 R11: fffff91ffff90405 R12: ffffe8ffffc82000 R13: 1ffff92000000e28 R14: ffff8880b8632a08 R15: ffffffff8e00bfe0 FS: 00007ff5da4316c0(0000) GS:ffff888125c5f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b30016ff8 CR3: 000000007db4c000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: perf_trace_run_bpf_submit+0x78/0x170 kernel/events/core.c:10866 do_perf_trace_lock_acquire include/trace/events/lock.h:24 [inline] perf_trace_lock_acquire+0x335/0x410 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:5834 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 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:2380 [inline] slab_free mm/slub.c:4642 [inline] kmem_cache_free+0x18f/0x400 mm/slub.c:4744 kfree_skb_reason include/linux/skbuff.h:1275 [inline] kfree_skb include/linux/skbuff.h:1284 [inline] hsr_forward_skb+0x1ac6/0x2860 net/hsr/hsr_forward.c:-1 send_hsr_supervision_frame+0x612/0xb30 net/hsr/hsr_device.c:358 hsr_announce+0x1d5/0x360 net/hsr/hsr_device.c:415 call_timer_fn+0x17b/0x5f0 kernel/time/timer.c:1747 expire_timers kernel/time/timer.c:1798 [inline] __run_timers kernel/time/timer.c:2372 [inline] __run_timer_base+0x61a/0x860 kernel/time/timer.c:2384 run_timer_base kernel/time/timer.c:2393 [inline] run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2403 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:1050 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1050 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:preempt_schedule_thunk+0x16/0x30 arch/x86/entry/thunk.S:12 Code: cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 48 89 e5 57 56 52 51 50 41 50 41 51 41 52 41 53 e8 2a 21 32 0a <41> 5b 41 5a 41 59 41 58 58 59 5a 5e 5f 5d e9 c7 d3 33 0a 90 90 90 RSP: 0018:ffffc900054a79e8 EFLAGS: 00000246 RAX: 8758d022ea265d00 RBX: 0000000000000246 RCX: 8758d022ea265d00 RDX: 0000000000000000 RSI: ffffffff8be26f20 RDI: ffffffff8be26ee0 RBP: ffffc900054a7a30 R08: ffffffff8fa0bcf7 R09: 1ffffffff1f4179e R10: dffffc0000000000 R11: fffffbfff1f4179f R12: dffffc0000000000 R13: ffffffff8e142480 R14: ffffffff8e142440 R15: 1ffff92000a94f48 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] _raw_spin_unlock_irqrestore+0xfd/0x110 kernel/locking/spinlock.c:194 rcu_preempt_deferred_qs_irqrestore+0x851/0xc40 kernel/rcu/tree_plugin.h:-1 rcu_read_unlock_special+0x3fe/0x4c0 kernel/rcu/tree_plugin.h:693 __rcu_read_unlock+0x84/0xe0 kernel/rcu/tree_plugin.h:438 rcu_read_unlock include/linux/rcupdate.h:873 [inline] class_rcu_destructor include/linux/rcupdate.h:1155 [inline] sched_mm_cid_remote_clear_old kernel/sched/core.c:10561 [inline] task_mm_cid_work+0x46e/0x760 kernel/sched/core.c:10621 task_work_run+0x1d4/0x260 kernel/task_work.c:227 resume_user_mode_work+0x5e/0x80 include/linux/resume_user_mode.h:50 exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline] irqentry_exit_to_user_mode+0x90/0x120 kernel/entry/common.c:184 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0033:0x7ff5d945e76c Code: 8b 04 25 00 00 00 00 48 8d b8 c8 fe ff ff e8 5b c1 0c 00 85 c0 0f 84 a3 01 00 00 64 f0 83 2c 25 90 ff ff ff 01 e8 a4 9b 0b 00 <48> 8b 0c 24 8b 00 48 83 b9 88 00 00 00 ff 89 81 90 00 00 00 75 04 RSP: 002b:00007ff5da431060 EFLAGS: 00000203 RAX: 00007ff5da431668 RBX: 00007ff5d97b6160 RCX: 00007ff5d9610ab1 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000180 RBP: 00007ff5d9610ab1 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007ff5d97b6160 R15: 00007ffce392b958 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 5820 Comm: syz-executor Not tainted 6.15.0-syzkaller-gcd2e103d57e5 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:csd_lock_wait kernel/smp.c:340 [inline] RIP: 0010:smp_call_function_many_cond+0xf69/0x12d0 kernel/smp.c:885 Code: 00 45 8b 2f 44 89 ee 83 e6 01 31 ff e8 60 78 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 0b 74 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 f0 73 0b RSP: 0018:ffffc9000448f360 EFLAGS: 00000293 RAX: ffffffff81b4c6f0 RBX: ffff8880b873cb40 RCX: ffff88802c978000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc9000448f4c0 R08: ffffffff8fa0bcf7 R09: 1ffffffff1f4179e R10: dffffc0000000000 R11: fffffbfff1f4179f R12: 1ffff110170c86b5 R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8880b86435a8 FS: 0000000000000000(0000) GS:ffff888125d5f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffe4258a230 CR3: 000000000df36000 CR4: 00000000003526f0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1052 __flush_tlb_multi arch/x86/include/asm/paravirt.h:91 [inline] flush_tlb_multi arch/x86/mm/tlb.c:1361 [inline] flush_tlb_mm_range+0x6b1/0x12c0 arch/x86/mm/tlb.c:1451 tlb_flush arch/x86/include/asm/tlb.h:23 [inline] tlb_flush_mmu_tlbonly include/asm-generic/tlb.h:480 [inline] tlb_flush_mmu+0x1a7/0x680 mm/mmu_gather.c:403 tlb_finish_mmu+0xc3/0x1d0 mm/mmu_gather.c:496 free_ldt_pgtables+0x17b/0x320 arch/x86/kernel/ldt.c:411 arch_exit_mmap arch/x86/include/asm/mmu_context.h:234 [inline] exit_mmap+0x17c/0xb50 mm/mmap.c:1270 __mmput+0x118/0x420 kernel/fork.c:1121 exit_mm+0x1da/0x2c0 kernel/exit.c:581 do_exit+0x640/0x22e0 kernel/exit.c:943 do_group_exit+0x21c/0x2d0 kernel/exit.c:1104 get_signal+0x1286/0x1340 kernel/signal.c:3034 arch_do_signal_or_restart+0x9a/0x750 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop+0x75/0x110 kernel/entry/common.c:111 exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline] syscall_exit_to_user_mode_work include/linux/entry-common.h:414 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:449 [inline] do_syscall_64+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fb389f84b93 Code: Unable to access opcode bytes at 0x7fb389f84b69. RSP: 002b:00007ffd99b86228 EFLAGS: 00000202 ORIG_RAX: 000000000000003d RAX: fffffffffffffe00 RBX: 00000000000016c1 RCX: 00007fb389f84b93 RDX: 0000000040000000 RSI: 00007ffd99b8623c RDI: 00000000ffffffff RBP: 00007ffd99b8623c R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000008 R13: 0000000000000003 R14: 0000000000000009 R15: 0000000000000000