watchdog: BUG: soft lockup - CPU#0 stuck for 143s! [syz.6.4756:23650] Modules linked in: irq event stamp: 13741453 hardirqs last enabled at (13741452): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:214 hardirqs last disabled at (13741453): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1052 softirqs last enabled at (4048800): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (4048800): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (4048800): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 softirqs last disabled at (4048803): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (4048803): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (4048803): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 CPU: 0 UID: 0 PID: 23650 Comm: syz.6.4756 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline] RIP: 0010:rcu_is_watching+0x31/0xb0 kernel/rcu/tree.c:751 Code: 56 53 65 ff 05 10 21 c8 10 e8 db 6b a0 09 89 c3 83 f8 08 73 65 49 bf 00 00 00 00 00 fc ff df 4c 8d 34 dd d0 dd 92 8d 4c 89 f0 <48> c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 2c 76 7f 00 48 c7 c3 RSP: 0018:ffffc900000068d8 EFLAGS: 00000293 RAX: ffffffff8d92ddd0 RBX: 0000000000000000 RCX: 8afdeb22f364ff00 RDX: 0000000000000000 RSI: ffffffff8bbf08c0 RDI: ffffffff8bbf0880 RBP: ffffffff81738c45 R08: 0000000000000000 R09: 0000000000000000 R10: ffffc900000065c8 R11: ffffffff81ac2e10 R12: 0000000000000002 R13: ffffffff8df3d6e0 R14: ffffffff8d92ddd0 R15: dffffc0000000000 FS: 00007f855f7d56c0(0000) GS:ffff888126139000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7327fcde9c CR3: 000000004e460000 CR4: 00000000003526f0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: trace_lock_acquire include/trace/events/lock.h:24 [inline] lock_acquire+0x5f/0x360 kernel/locking/lockdep.c:5831 rcu_lock_acquire include/linux/rcupdate.h:331 [inline] rcu_read_lock include/linux/rcupdate.h:867 [inline] class_rcu_constructor include/linux/rcupdate.h:1195 [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:56 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:77 poison_kmalloc_redzone mm/kasan/common.c:400 [inline] __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:417 kasan_kmalloc include/linux/kasan.h:262 [inline] __do_kmalloc_node mm/slub.c:5650 [inline] __kmalloc_noprof+0x411/0x7f0 mm/slub.c:5662 kmalloc_noprof include/linux/slab.h:961 [inline] kzalloc_noprof include/linux/slab.h:1094 [inline] ieee802_11_parse_elems_full+0x152/0x2ab0 net/mac80211/parse.c:1011 ieee802_11_parse_elems_crc net/mac80211/ieee80211_i.h:2470 [inline] ieee802_11_parse_elems net/mac80211/ieee80211_i.h:2477 [inline] ieee80211_inform_bss+0x10c/0x10a0 net/mac80211/scan.c:79 rdev_inform_bss net/wireless/rdev-ops.h:418 [inline] cfg80211_inform_single_bss_data+0xd05/0x1ac0 net/wireless/scan.c:2385 cfg80211_inform_bss_data+0x203/0x3b40 net/wireless/scan.c:3240 cfg80211_inform_bss_frame_data+0x3d7/0x730 net/wireless/scan.c:3331 ieee80211_bss_info_update+0x749/0x9e0 net/mac80211/scan.c:226 ieee80211_scan_rx+0x593/0xa20 net/mac80211/scan.c:355 __ieee80211_rx_handle_packet net/mac80211/rx.c:5194 [inline] ieee80211_rx_list+0x2192/0x2c10 net/mac80211/rx.c:5451 ieee80211_rx_napi+0x1a8/0x3d0 net/mac80211/rx.c:5474 ieee80211_rx include/net/mac80211.h:5214 [inline] ieee80211_handle_queued_frames+0xe8/0x1f0 net/mac80211/main.c:453 tasklet_action_common+0x36c/0x580 kernel/softirq.c:925 handle_softirqs+0x286/0x870 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1052 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1052 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:rcu_preempt_read_exit kernel/rcu/tree_plugin.h:398 [inline] RIP: 0010:__rcu_read_unlock+0x37/0xe0 kernel/rcu/tree_plugin.h:435 Code: 49 bf 00 00 00 00 00 fc ff df 65 48 8b 3c 25 08 70 6e 92 48 8d 9f 84 04 00 00 49 89 dc 49 c1 ec 03 43 0f b6 04 3c 84 c0 75 4f 0b 75 1d 4c 8d b7 88 04 00 00 4c 89 f0 48 c1 e8 03 42 0f b6 04 RSP: 0018:ffffc9000ba1f9b8 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffff888044a022c4 RCX: 8afdeb22f364ff00 RDX: 0000000000000001 RSI: ffffffff8d8f55b7 RDI: ffff888044a01e40 RBP: 00000000fffffa00 R08: ffffc9000ba1f5d7 R09: 0000000000000000 R10: ffffc9000ba1f5c8 R11: fffff52001743ebb R12: 1ffff11008940458 R13: ffff8880b883b5c8 R14: ffff8880b883b580 R15: dffffc0000000000 drain_obj_stock+0x196/0x3c0 mm/memcontrol.c:2986 refill_obj_stock+0x247/0x850 mm/memcontrol.c:3040 obj_cgroup_charge_account+0x116/0x660 mm/memcontrol.c:3104 __memcg_slab_post_alloc_hook+0x3db/0x7d0 mm/memcontrol.c:3188 memcg_slab_post_alloc_hook mm/slub.c:2342 [inline] slab_post_alloc_hook mm/slub.c:4989 [inline] slab_alloc_node mm/slub.c:5288 [inline] __do_kmalloc_node mm/slub.c:5649 [inline] __kmalloc_node_noprof+0x5eb/0x800 mm/slub.c:5656 kmalloc_node_noprof include/linux/slab.h:987 [inline] __bpf_map_area_alloc kernel/bpf/syscall.c:395 [inline] bpf_map_area_alloc+0x64/0x180 kernel/bpf/syscall.c:408 ringbuf_map_alloc+0x178/0x2f0 kernel/bpf/ringbuf.c:202 map_create+0xaa6/0x1640 kernel/bpf/syscall.c:1512 __sys_bpf+0x5f0/0x860 kernel/bpf/syscall.c:6132 __do_sys_bpf kernel/bpf/syscall.c:6260 [inline] __se_sys_bpf kernel/bpf/syscall.c:6258 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:6258 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f856158f749 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:00007f855f7d5038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f85617e6090 RCX: 00007f856158f749 RDX: 0000000000000048 RSI: 00002000000007c0 RDI: 0000000000000000 RBP: 00007f8561613f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f85617e6128 R14: 00007f85617e6090 R15: 00007ffc15c61f68 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 23697 Comm: kworker/u8:4 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:get_current arch/x86/include/asm/current.h:25 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x8/0x70 kernel/kcov.c:216 Code: 8b 3d 54 e2 d2 0b 48 89 de 5b e9 83 8b 5a 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 <65> 48 8b 0c 25 08 70 6e 92 65 8b 15 58 6c ae 10 81 e2 00 01 ff 00 RSP: 0018:ffffc9000be27638 EFLAGS: 00000202 RAX: ffffffff81b4944b RBX: 1ffff11017108441 RCX: ffff88802f679e40 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc9000be277c0 R08: ffffffff8f7cef77 R09: 1ffffffff1ef9dee R10: dffffc0000000000 R11: fffffbfff1ef9def R12: ffff8880b8842208 R13: dffffc0000000000 R14: ffff8880b893b240 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff888126239000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f59c7915000 CR3: 000000000dd38000 CR4: 00000000003526f0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: csd_lock_wait kernel/smp.c:342 [inline] smp_call_function_many_cond+0xd4b/0x12d0 kernel/smp.c:877 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:2713 [inline] smp_text_poke_batch_finish+0x5f9/0x1130 arch/x86/kernel/alternative.c:2923 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146 static_key_enable_cpuslocked+0x128/0x250 kernel/jump_label.c:210 static_key_enable+0x1a/0x20 kernel/jump_label.c:223 toggle_allocation_gate+0xad/0x240 mm/kfence/core.c:852 process_one_work kernel/workqueue.c:3263 [inline] process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3346 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3427 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245