watchdog: BUG: soft lockup - CPU#1 stuck for 143s! [syz.5.2411:23880] Modules linked in: irq event stamp: 13531409 hardirqs last enabled at (13531408): [] irqentry_exit+0x59e/0x620 kernel/entry/common.c:242 hardirqs last disabled at (13531409): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1056 softirqs last enabled at (3026400): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (3026400): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (3026400): [] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 softirqs last disabled at (3026403): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (3026403): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (3026403): [] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 CPU: 1 UID: 0 PID: 23880 Comm: syz.5.2411 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026 RIP: 0010:strlen+0x3f/0x70 lib/string.c:420 Code: 00 00 00 00 fc ff df 48 89 fb 49 89 c7 48 89 d8 48 c1 e8 03 42 0f b6 04 30 84 c0 75 11 48 ff c3 49 8d 47 01 42 80 7c 3f 01 00 <75> de eb 19 89 d9 80 e1 07 38 c1 7c e6 49 89 fc 48 89 df e8 29 8d RSP: 0018:ffffc90000a078d8 EFLAGS: 00000206 RAX: 0000000000000000 RBX: ffffffff8bae0cc1 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8e55df20 RDI: ffffffff8bae0cc0 RBP: ffffc90000a079f8 R08: 0000000000000002 R09: 0000000000000000 R10: ffffc90000a07bd8 R11: ffffffff81af96f0 R12: ffffffff8e429e60 R13: ffffffff8e55df20 R14: dffffc0000000000 R15: ffffffffffffffff FS: 00007f07e5edd6c0(0000) GS:ffff8881257c8000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000100000001 CR3: 0000000092d5a000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000200000000300 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: __fortify_strlen include/linux/fortify-string.h:266 [inline] trace_event_get_offsets_lock_acquire include/trace/events/lock.h:24 [inline] do_perf_trace_lock_acquire include/trace/events/lock.h:24 [inline] perf_trace_lock_acquire+0xd7/0x420 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+0x2ea/0x330 kernel/locking/lockdep.c:5831 rcu_lock_acquire include/linux/rcupdate.h:312 [inline] rcu_read_lock include/linux/rcupdate.h:850 [inline] class_rcu_constructor include/linux/rcupdate.h:1193 [inline] unwind_next_frame+0xc2/0x23c0 arch/x86/kernel/unwind_orc.c:495 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 poison_kmalloc_redzone mm/kasan/common.c:398 [inline] __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:415 kasan_kmalloc include/linux/kasan.h:263 [inline] __do_kmalloc_node mm/slub.c:5657 [inline] __kmalloc_noprof+0x40c/0x7e0 mm/slub.c:5669 kmalloc_noprof include/linux/slab.h:962 [inline] kzalloc_noprof include/linux/slab.h:1200 [inline] ieee802_11_parse_elems_full+0x159/0x2ab0 net/mac80211/parse.c:1031 ieee802_11_parse_elems net/mac80211/ieee80211_i.h:2467 [inline] ieee80211_inform_bss+0x161/0x1160 net/mac80211/scan.c:79 rdev_inform_bss net/wireless/rdev-ops.h:418 [inline] cfg80211_inform_single_bss_data+0xcf9/0x1ab0 net/wireless/scan.c:2373 cfg80211_inform_bss_data+0x23f/0x3c20 net/wireless/scan.c:3228 cfg80211_inform_bss_frame_data+0x3c7/0x710 net/wireless/scan.c:3319 ieee80211_bss_info_update+0x794/0xa40 net/mac80211/scan.c:230 ieee80211_scan_rx+0x552/0xa40 net/mac80211/scan.c:364 __ieee80211_rx_handle_packet net/mac80211/rx.c:5287 [inline] ieee80211_rx_list+0x2508/0x3050 net/mac80211/rx.c:5544 ieee80211_rx_napi+0x1b1/0x3e0 net/mac80211/rx.c:5567 ieee80211_rx include/net/mac80211.h:5216 [inline] ieee80211_handle_queued_frames+0xe8/0x1e0 net/mac80211/main.c:452 tasklet_action_common+0x2da/0x4b0 kernel/softirq.c:925 handle_softirqs+0x22a/0x7c0 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:__schedule+0x1572/0x5260 kernel/sched/core.c:6864 Code: c1 e8 03 42 80 3c 30 00 74 08 48 89 df e8 56 44 91 f6 4c 89 2b 4c 89 e7 4c 89 ee e8 28 10 97 f5 48 89 c7 e8 30 98 f7 f5 31 ff <4d> 39 ec 40 0f 95 c7 e8 52 a1 f7 f5 48 8b 84 24 d8 00 00 00 66 42 RSP: 0018:ffffc9001175fa60 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffff8880b873a9d8 RCX: 0000000080000001 RDX: 0000000000000000 RSI: ffffffff8dcd201e RDI: 0000000000000000 RBP: ffffc9001175fc50 R08: ffffffff8ff01677 R09: 1ffffffff1fe02ce R10: dffffc0000000000 R11: fffffbfff1fe02cf R12: ffff888057f69e40 R13: ffff88807a279e40 R14: dffffc0000000000 R15: 1ffff110170e769c 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:check_kcov_mode kernel/kcov.c:185 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x30/0x70 kernel/kcov.c:217 Code: 04 24 65 48 8b 0d 08 08 31 11 65 8b 15 29 08 31 11 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 44 16 00 00 00 74 2c <8b> 91 20 16 00 00 83 fa 02 75 21 48 8b 91 28 16 00 00 48 8b 32 48 RSP: 0018:ffffc9001175fd80 EFLAGS: 00000246 RAX: ffffffff84600792 RBX: ffff88802ee5c550 RCX: ffff888057f69e40 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: dffffc0000000000 R11: ffffed100f5832db R12: dffffc0000000000 R13: ffff88802c7a2ec0 R14: ffff88802c7a2e00 R15: ffff88802e023a80 cred_label security/apparmor/include/cred.h:26 [inline] aa_cred_raw_label security/apparmor/include/cred.h:49 [inline] aa_current_raw_label security/apparmor/include/cred.h:96 [inline] aa_get_current_label security/apparmor/include/cred.h:110 [inline] apparmor_socket_post_create+0x102/0x480 security/apparmor/lsm.c:1309 security_socket_post_create+0xac/0x330 security/security.c:4113 __sock_create+0x555/0x9d0 net/socket.c:1628 sock_create net/socket.c:1663 [inline] __sys_socket_create net/socket.c:1700 [inline] __sys_socket+0xd6/0x1b0 net/socket.c:1747 __do_sys_socket net/socket.c:1761 [inline] __se_sys_socket net/socket.c:1759 [inline] __x64_sys_socket+0x7a/0x90 net/socket.c:1759 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: 0033:0x7f07e4f9bf79 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:00007f07e5edd028 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffda RBX: 00007f07e5215fa0 RCX: 00007f07e4f9bf79 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000010 RBP: 00007f07e50327e0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f07e5216038 R14: 00007f07e5215fa0 R15: 00007ffd37aca1d8 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 23831 Comm: syz.0.2400 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026 RIP: 0010:arch_irqs_disabled_flags arch/x86/include/asm/irqflags.h:146 [inline] RIP: 0010:arch_irqs_disabled arch/x86/include/asm/irqflags.h:153 [inline] RIP: 0010:lock_acquire+0x12e/0x330 kernel/locking/lockdep.c:5871 Code: 00 00 48 83 c4 28 48 c7 c7 67 f9 f3 8d e8 ea 12 fb 09 b8 ff ff ff ff 65 0f c1 05 cd 4a 55 11 83 f8 01 0f 85 ae 00 00 00 9c 58 00 02 00 00 0f 85 c1 00 00 00 f7 44 24 08 00 02 00 00 0f 85 c6 RSP: 0018:ffffc90000006eb0 EFLAGS: 00000046 RAX: 0000000000000046 RBX: 0000000000000000 RCX: 0000000080010106 RDX: 0000000028290900 RSI: ffffffff8df3f967 RDI: ffffffff8c076280 RBP: ffffffff81b14992 R08: ffffffff81b14992 R09: ffff8880b8628298 R10: dffffc0000000000 R11: fffffbfff1fe02cf R12: 0000000000000000 R13: ffff8880b8628298 R14: 0000000000000001 R15: 0000000000000046 FS: 00007efd50bb36c0(0000) GS:ffff8881256c8000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f20165ffdfc CR3: 000000007d584000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0100000000000000 DR2: 0000200000000300 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: __raw_spin_lock_irq include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock_irq+0x3d/0x50 kernel/locking/spinlock.c:170 __run_hrtimer kernel/time/hrtimer.c:1789 [inline] __hrtimer_run_queues+0x5f2/0xc30 kernel/time/hrtimer.c:1849 hrtimer_interrupt+0x42b/0x1010 kernel/time/hrtimer.c:1911 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1045 [inline] __sysvec_apic_timer_interrupt+0x102/0x3d0 arch/x86/kernel/apic/apic.c:1062 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline] sysvec_apic_timer_interrupt+0x52/0xc0 arch/x86/kernel/apic/apic.c:1056 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:strlen+0x2e/0x70 lib/string.c:420 Code: 41 57 41 56 41 54 53 48 c7 c0 ff ff ff ff 49 be 00 00 00 00 00 fc ff df 48 89 fb 49 89 c7 48 89 d8 48 c1 e8 03 42 0f b6 04 30 <84> c0 75 11 48 ff c3 49 8d 47 01 42 80 7c 3f 01 00 75 de eb 19 89 RSP: 0018:ffffc900000072f8 EFLAGS: 00000a07 RAX: 0000000000000006 RBX: ffffffff8bae0ccc RCX: 000000008bae0c03 RDX: ffffffff8175b275 RSI: ffffffff8e55df20 RDI: ffffffff8bae0cc0 RBP: ffffc90000007420 R08: ffffc900114af0e8 R09: 0000000000000000 R10: ffffc900000075b8 R11: fffff52000000eb9 R12: dffffc0000000000 R13: ffffffff8175b275 R14: dffffc0000000000 R15: 000000000000000b __fortify_strlen include/linux/fortify-string.h:266 [inline] trace_event_get_offsets_lock include/trace/events/lock.h:50 [inline] do_perf_trace_lock include/trace/events/lock.h:50 [inline] perf_trace_lock+0xce/0x3f0 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+0x379/0x3a0 kernel/locking/lockdep.c:5879 rcu_lock_release include/linux/rcupdate.h:322 [inline] rcu_read_unlock include/linux/rcupdate.h:881 [inline] class_rcu_destructor include/linux/rcupdate.h:1193 [inline] unwind_next_frame+0x1aaa/0x23c0 arch/x86/kernel/unwind_orc.c:695 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 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+0x427/0x6f0 mm/slub.c:5315 __alloc_skb+0x1d7/0x390 net/core/skbuff.c:679 skb_copy+0x188/0x800 net/core/skbuff.c:2163 mac80211_hwsim_tx_frame_no_nl+0xd00/0x11f0 drivers/net/wireless/virtual/mac80211_hwsim.c:1891 mac80211_hwsim_tx_frame+0x1b5/0x200 drivers/net/wireless/virtual/mac80211_hwsim.c:2264 mac80211_hwsim_beacon_tx+0x3e8/0x870 drivers/net/wireless/virtual/mac80211_hwsim.c:2365 __iterate_interfaces+0x2ab/0x590 net/mac80211/util.c:761 ieee80211_iterate_active_interfaces_atomic+0xdb/0x180 net/mac80211/util.c:797 mac80211_hwsim_beacon+0xbb/0x180 drivers/net/wireless/virtual/mac80211_hwsim.c:2395 __run_hrtimer kernel/time/hrtimer.c:1785 [inline] __hrtimer_run_queues+0x529/0xc30 kernel/time/hrtimer.c:1849 hrtimer_run_softirq+0x182/0x5a0 kernel/time/hrtimer.c:1866 handle_softirqs+0x22a/0x7c0 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:hlist_empty include/linux/list.h:984 [inline] RIP: 0010:do_perf_trace_lock_acquire include/trace/events/lock.h:24 [inline] RIP: 0010:perf_trace_lock_acquire+0x16a/0x420 include/trace/events/lock.h:24 Code: 48 c1 e8 03 42 80 3c 30 00 74 08 48 89 df e8 ad e0 8d 00 48 83 3b 00 75 25 48 8b 5c 24 08 48 89 d8 48 c1 e8 03 42 80 3c 30 00 <74> 08 48 89 df e8 8c e0 8d 00 48 83 3b 00 0f 84 c4 01 00 00 48 8d RSP: 0018:ffffc900114af1a0 EFLAGS: 00000246 RAX: 1ffffd1ffff8240b RBX: ffffe8ffffc12058 RCX: 0000000080000003 RDX: 0000000000000000 RSI: ffffffff8c076260 RDI: ffffffff8c076220 RBP: ffffc900114af298 R08: 0000000000000002 R09: 0000000000000000 R10: dffffc0000000000 R11: fffff94000ac5b79 R12: ffffffff8e429e60 R13: 0000000000000013 R14: dffffc0000000000 R15: 1ffff92002295e3c __do_trace_lock_acquire include/trace/events/lock.h:24 [inline] trace_lock_acquire include/trace/events/lock.h:24 [inline] lock_acquire+0x2ea/0x330 kernel/locking/lockdep.c:5831 rcu_lock_acquire include/linux/rcupdate.h:312 [inline] rcu_read_lock_sched include/linux/rcupdate.h:948 [inline] pfn_valid+0xd6/0x480 include/linux/mmzone.h:2184 page_table_check_clear+0x21/0x5f0 mm/page_table_check.c:70 ptep_get_and_clear_full arch/x86/include/asm/jump_label.h:-1 [inline] get_and_clear_full_ptes include/linux/pgtable.h:725 [inline] zap_present_folio_ptes mm/memory.c:1630 [inline] zap_present_ptes mm/memory.c:1712 [inline] do_zap_pte_range mm/memory.c:1814 [inline] zap_pte_range mm/memory.c:1858 [inline] zap_pmd_range mm/memory.c:1950 [inline] zap_pud_range mm/memory.c:1978 [inline] zap_p4d_range mm/memory.c:1999 [inline] unmap_page_range+0x3294/0x4030 mm/memory.c:2020 unmap_single_vma mm/memory.c:2062 [inline] unmap_vmas+0x3c0/0x5c0 mm/memory.c:2104 exit_mmap+0x251/0xb30 mm/mmap.c:1277 __mmput+0x118/0x430 kernel/fork.c:1174 copy_process+0x29a7/0x3cf0 kernel/fork.c:2503 kernel_clone+0x248/0x870 kernel/fork.c:2654 __do_sys_clone kernel/fork.c:2795 [inline] __se_sys_clone kernel/fork.c:2779 [inline] __x64_sys_clone+0x1b6/0x230 kernel/fork.c:2779 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: 0033:0x7efd4fd9bf79 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:00007efd50bb2fd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007efd50015fa0 RCX: 00007efd4fd9bf79 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000011 RBP: 00007efd4fe327e0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 00007efd50016038 R14: 00007efd50015fa0 R15: 00007ffd4ba41df8