watchdog: BUG: soft lockup - CPU#1 stuck for 113s! [syz.0.14527:3158] Modules linked in: irq event stamp: 11446223 hardirqs last enabled at (11446222): [] irqentry_exit+0x59e/0x620 kernel/entry/common.c:242 hardirqs last disabled at (11446223): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1056 softirqs last enabled at (11417302): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (11417302): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (11417302): [] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 softirqs last disabled at (11417305): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (11417305): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (11417305): [] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 CPU: 1 UID: 0 PID: 3158 Comm: syz.0.14527 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:unwind_next_frame+0x48c/0x23c0 arch/x86/kernel/unwind_orc.c:520 Code: 89 15 b8 83 ab 11 48 85 d2 0f 84 40 02 00 00 4c 8d 62 04 4c 8d 6a 05 4c 89 e0 48 c1 e8 03 0f b6 04 28 84 c0 0f 85 66 18 00 00 <4c> 89 e8 48 c1 e8 03 0f b6 04 28 84 c0 0f 85 79 18 00 00 41 0f b6 RSP: 0018:ffffc90000a086b8 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffffffff9032fc0c RCX: ffffffff9032fc10 RDX: ffffffff90b3a678 RSI: ffffffff90b3a62a RDI: ffffffff8c27a420 RBP: dffffc0000000000 R08: 000000000000000e R09: ffffffff8e7602e0 R10: ffffc90000a08440 R11: ffffffffa02019d4 R12: ffffffff90b3a67c R13: ffffffff90b3a67d R14: ffffc90000a08788 R15: ffffffff9032fc0c FS: 00007fb6418556c0(0000) GS:ffff888125566000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f8240ee632f CR3: 00000000b3bfc000 CR4: 00000000003526f0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:78 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:584 poison_slab_object mm/kasan/common.c:253 [inline] __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:285 kasan_slab_free include/linux/kasan.h:235 [inline] slab_free_hook mm/slub.c:2687 [inline] slab_free mm/slub.c:6124 [inline] kmem_cache_free+0x187/0x630 mm/slub.c:6254 skb_kfree_head net/core/skbuff.c:1087 [inline] skb_free_head net/core/skbuff.c:1101 [inline] skb_release_data+0x6c3/0x940 net/core/skbuff.c:1128 skb_release_all net/core/skbuff.c:1203 [inline] __kfree_skb+0x5d/0x210 net/core/skbuff.c:1217 mac80211_hwsim_beacon_tx+0x3e8/0x870 drivers/net/wireless/virtual/mac80211_hwsim.c:2365 __iterate_interfaces+0x2ab/0x590 net/mac80211/util.c:760 ieee80211_iterate_active_interfaces_atomic+0xdb/0x180 net/mac80211/util.c:796 mac80211_hwsim_beacon+0xbb/0x180 drivers/net/wireless/virtual/mac80211_hwsim.c:2395 __run_hrtimer kernel/time/hrtimer.c:1785 [inline] __hrtimer_run_queues+0x53a/0xcc0 kernel/time/hrtimer.c:1849 hrtimer_run_softirq+0x182/0x5a0 kernel/time/hrtimer.c:1866 handle_softirqs+0x22a/0x870 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0x5f/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:trace_sched_entry_tp include/trace/events/sched.h:882 [inline] RIP: 0010:__schedule+0xdd/0x5340 kernel/sched/core.c:6777 Code: 6d 07 83 f8 08 0f 83 d8 15 00 00 89 c3 c1 e8 06 48 8d 3c c5 b0 72 11 90 be 08 00 00 00 e8 2b c6 81 f6 48 0f a3 1d 73 86 63 04 <73> 0d e8 3c b9 fc f5 84 c0 0f 84 d3 19 00 00 e8 4f 40 ff ff 48 63 RSP: 0018:ffffc90006716760 EFLAGS: 00000257 RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffffff8badec35 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff901172b0 RBP: ffffc90006716960 R08: ffffffff901172b7 R09: 1ffffffff2022e56 R10: dffffc0000000000 R11: fffffbfff2022e57 R12: 0000000000000000 R13: 0000000000000001 R14: dffffc0000000000 R15: 0000000000000000 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7234 irqentry_exit+0x599/0x620 kernel/entry/common.c:239 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:lock_is_held_type+0x45/0x150 kernel/locking/lockdep.c:-1 Code: 84 e4 00 00 00 65 8b 05 c9 d0 6e 07 85 c0 0f 85 d5 00 00 00 65 4c 8b 2d 11 8b 6e 07 41 83 bd 14 0b 00 00 00 0f 85 bf 00 00 00 <89> f5 49 89 fe 9c 41 5c fa 48 c7 c7 e3 b0 f0 8d e8 a6 18 00 00 65 RSP: 0018:ffffc90006716a90 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 00000000ffffffff RCX: 0000000080000001 RDX: ffffc90010e13000 RSI: 00000000ffffffff RDI: ffffffff8e7602e0 RBP: ffffc90006716c48 R08: ffffffff823a0ada R09: ffffffff8e7602e0 R10: ffffc900067168a0 R11: ffffffffa02019d4 R12: 0000000000031303 R13: ffff888058eadac0 R14: ffff88813fef10d0 R15: 0000000000001000 lookup_page_ext mm/page_ext.c:258 [inline] page_ext_lookup+0xe7/0x180 mm/page_ext.c:513 page_ext_iter_begin include/linux/page_ext.h:133 [inline] __update_page_owner_handle+0x12f/0x570 mm/page_owner.c:256 __set_page_owner+0x10a/0x4c0 mm/page_owner.c:342 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x231/0x280 mm/page_alloc.c:1889 prep_new_page mm/page_alloc.c:1897 [inline] get_page_from_freelist+0x24dc/0x2580 mm/page_alloc.c:3962 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5250 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2485 alloc_frozen_pages_noprof mm/mempolicy.c:2556 [inline] alloc_pages_noprof+0xa8/0x190 mm/mempolicy.c:2576 get_free_pages_noprof+0xf/0x80 mm/page_alloc.c:5309 __kasan_populate_vmalloc_do mm/kasan/shadow.c:364 [inline] __kasan_populate_vmalloc+0x38/0x1d0 mm/kasan/shadow.c:424 kasan_populate_vmalloc include/linux/kasan.h:580 [inline] alloc_vmap_area+0xd73/0x14b0 mm/vmalloc.c:2129 __get_vm_area_node+0x1f8/0x300 mm/vmalloc.c:3232 __vmalloc_node_range_noprof+0x372/0x1730 mm/vmalloc.c:4024 __vmalloc_node_noprof mm/vmalloc.c:4124 [inline] vmalloc_noprof+0xb2/0xe0 mm/vmalloc.c:4159 bpf_prog_calc_tag+0x4c/0x370 kernel/bpf/core.c:308 resolve_pseudo_ldimm64+0xbd/0xc90 kernel/bpf/verifier.c:21647 bpf_check+0x1d83/0x1ce00 kernel/bpf/verifier.c:25903 bpf_prog_load+0x1484/0x1ae0 kernel/bpf/syscall.c:3089 __sys_bpf+0x618/0x950 kernel/bpf/syscall.c:6229 __do_sys_bpf kernel/bpf/syscall.c:6342 [inline] __se_sys_bpf kernel/bpf/syscall.c:6340 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:6340 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fb64099c629 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fb641855028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007fb640c15fa0 RCX: 00007fb64099c629 RDX: 0000000000000080 RSI: 0000200000000100 RDI: 0000000000000005 RBP: 00007fb640a32b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fb640c16038 R14: 00007fb640c15fa0 R15: 00007ffcea9abfe8 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 383 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:csd_lock_wait kernel/smp.c:342 [inline] RIP: 0010:smp_call_function_many_cond+0xce5/0x12c0 kernel/smp.c:877 Code: 45 8b 2c 24 44 89 ee 83 e6 01 31 ff e8 24 e3 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 cf de 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 b3 de RSP: 0000:ffffc9000697f820 EFLAGS: 00000293 RAX: ffffffff81b9addd RBX: 1ffff110170e812d RCX: ffff88802b620000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc9000697f950 R08: ffffffff901172b7 R09: 1ffffffff2022e56 R10: dffffc0000000000 R11: fffffbfff2022e57 R12: ffff8880b8740968 R13: dffffc0000000000 R14: ffff8880b863bf80 R15: 0000000000000001 FS: 000055555b565500(0000) GS:ffff888125466000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055555b580a28 CR3: 000000005490c000 CR4: 00000000003526f0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1043 __flush_tlb_multi arch/x86/include/asm/paravirt.h:57 [inline] flush_tlb_multi arch/x86/mm/tlb.c:1382 [inline] flush_tlb_mm_range+0x5c3/0x10c0 arch/x86/mm/tlb.c:1472 flush_tlb_page arch/x86/include/asm/tlbflush.h:323 [inline] ptep_clear_flush+0x120/0x170 mm/pgtable-generic.c:103 wp_page_copy mm/memory.c:3846 [inline] do_wp_page+0x4129/0x5a00 mm/memory.c:4241 handle_pte_fault mm/memory.c:6332 [inline] __handle_mm_fault mm/memory.c:6454 [inline] handle_mm_fault+0x1520/0x3310 mm/memory.c:6623 do_user_addr_fault+0xa73/0x1340 arch/x86/mm/fault.c:1334 handle_page_fault arch/x86/mm/fault.c:1474 [inline] exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1527 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 RIP: 0033:0x7fb640961220 Code: ac 28 00 48 8d 0c 1e 49 39 d0 49 89 48 60 0f 95 c2 48 29 d8 0f b6 d2 48 83 c8 01 48 c1 e2 02 48 09 da 48 83 ca 01 48 89 56 08 <48> 89 41 08 48 8d 4e 10 eb b0 48 8d 0d 5f df 0c 00 ba 9e 10 00 00 RSP: 002b:00007ffcea9ac1f0 EFLAGS: 00010206 RAX: 00000000000185e1 RBX: 0000000000008040 RCX: 000055555b580a20 RDX: 0000000000008041 RSI: 000055555b5789e0 RDI: 0000000000000004 RBP: 0000000000000802 R08: 00007fb640bebe20 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000008030 R13: 0000000000000000 R14: 00007fb640bebe80 R15: 0000000000000000