syzbot

watchdog: BUG: soft lockup - CPU#0 stuck for 116s! [syz.0.7777:4559]
Modules linked in:
irq event stamp: 18040469
hardirqs last  enabled at (18040468): [<ffffffff8baebf2e>] irqentry_exit+0x59e/0x620 kernel/entry/common.c:242
hardirqs last disabled at (18040469): [<ffffffff8baea93e>] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1056
softirqs last  enabled at (17616470): [<ffffffff8188041f>] __do_softirq kernel/softirq.c:656 [inline]
softirqs last  enabled at (17616470): [<ffffffff8188041f>] invoke_softirq kernel/softirq.c:496 [inline]
softirqs last  enabled at (17616470): [<ffffffff8188041f>] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723
softirqs last disabled at (17616473): [<ffffffff8188041f>] __do_softirq kernel/softirq.c:656 [inline]
softirqs last disabled at (17616473): [<ffffffff8188041f>] invoke_softirq kernel/softirq.c:496 [inline]
softirqs last disabled at (17616473): [<ffffffff8188041f>] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723
CPU: 0 UID: 0 PID: 4559 Comm: syz.0.7777 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:__skb_flow_dissect+0xf1/0x6d20 net/core/flow_dissector.c:1062
Code: 74 38 20 48 be f8 f8 f8 f2 f2 f2 f2 f2 4a 89 74 38 28 4a 89 74 38 30 48 83 c2 06 4a 89 54 38 38 48 ba f8 f8 f2 f2 f8 f8 f8 f8 <48> 8d ba 0a f9 05 00 4a 89 7c 38 40 4a 89 74 38 48 48 8d be 00 00
RSP: 0018:ffffc90000006ee0 EFLAGS: 00000282
RAX: 1ffff92000000e0c RBX: 0000000000000000 RCX: f2f8f2f2f2f2f2f8
RDX: f8f8f8f8f2f2f8f8 RSI: f2f2f2f2f2f8f8f8 RDI: 0000000000000000
RBP: ffffc900000074f8 R08: 0000000000000000 R09: 0000000000000000
R10: ffffc90000007580 R11: fffff52000000eba R12: 0000000000000000
R13: ffff888050248b40 R14: ffffffff901229d0 R15: dffffc0000000000
FS:  00007f86d6fb46c0(0000) GS:ffff88812545d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007faff4901700 CR3: 00000000aaab0000 CR4: 00000000003526f0
DR0: 0000000000000008 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 __skb_get_hash_net+0xe6/0x2e0 net/core/flow_dissector.c:1898
 skb_get_hash include/linux/skbuff.h:1662 [inline]
 skb_tx_hash net/core/dev.c:3540 [inline]
 netdev_pick_tx+0x46c/0xf30 net/core/dev.c:4681
 netdev_core_pick_tx+0x132/0x350 net/core/dev.c:4713
 __dev_queue_xmit+0x576/0x3890 net/core/dev.c:4796
 dev_queue_xmit include/linux/netdevice.h:3385 [inline]
 hsr_xmit net/hsr/hsr_forward.c:440 [inline]
 hsr_forward_do net/hsr/hsr_forward.c:581 [inline]
 hsr_forward_skb+0x157b/0x2860 net/hsr/hsr_forward.c:743
 send_hsr_supervision_frame+0x731/0xcb0 net/hsr/hsr_device.c:364
 hsr_announce+0x1db/0x370 net/hsr/hsr_device.c:421
 call_timer_fn+0x192/0x640 kernel/time/timer.c:1748
 expire_timers kernel/time/timer.c:1799 [inline]
 __run_timers kernel/time/timer.c:2373 [inline]
 __run_timer_base+0x652/0x8b0 kernel/time/timer.c:2385
 run_timer_base kernel/time/timer.c:2394 [inline]
 run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2404
 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
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:perf_tp_event+0x244/0x2a90 kernel/events/core.c:-1
Code: c8 75 0a e8 ee ac cc ff e9 e1 04 00 00 48 8b 44 24 38 4c 8d b8 88 00 00 00 48 8d 84 24 c0 00 00 00 48 8d 48 08 48 89 4c 24 40 <48> 83 c0 50 48 89 44 24 20 4c 89 7c 24 08 4c 8d a3 f8 01 00 00 4c
RSP: 0018:ffffc9000cfdf500 EFLAGS: 00000202
RAX: ffffc9000cfdf5c0 RBX: ffff888088630648 RCX: ffffc9000cfdf5c8
RDX: ffff8880333adb80 RSI: 0000000000000002 RDI: ffffe8ffffcd3004
RBP: ffffc9000cfdf7c8 R08: ffffc9000cfdf70f R09: 0000000000000000
R10: ffffc9000cfdf700 R11: fffff520019fbee2 R12: ffffe8ffffcd3000
R13: dffffc0000000000 R14: 00000000000000eb R15: ffff8880b8633418
 perf_trace_run_bpf_submit+0xee/0x170 kernel/events/core.c:11334
 do_perf_trace_lock_acquire include/trace/events/lock.h:24 [inline]
 perf_trace_lock_acquire+0x345/0x440 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+0x2a4/0x2e0 kernel/locking/lockdep.c:5831
 rcu_lock_acquire include/linux/rcupdate.h:312 [inline]
 rcu_read_lock include/linux/rcupdate.h:850 [inline]
 percpu_ref_put_many include/linux/percpu-refcount.h:330 [inline]
 percpu_ref_put+0x35/0x180 include/linux/percpu-refcount.h:351
 refill_obj_stock+0x25b/0xa80 mm/memcontrol.c:3098
 obj_cgroup_charge_account+0x116/0x650 mm/memcontrol.c:3162
 __memcg_slab_post_alloc_hook+0x5f8/0xa80 mm/memcontrol.c:3249
 memcg_slab_post_alloc_hook mm/slub.c:2457 [inline]
 slab_post_alloc_hook mm/slub.c:4549 [inline]
 slab_alloc_node mm/slub.c:4866 [inline]
 kmem_cache_alloc_noprof+0x347/0x650 mm/slub.c:4873
 sk_prot_alloc+0x57/0x210 net/core/sock.c:2239
 sk_alloc+0x3a/0x390 net/core/sock.c:2301
 tipc_sk_create+0x10a/0x27a0 net/tipc/socket.c:486
 __sock_create+0x4b2/0x9d0 net/socket.c:1605
 sock_create net/socket.c:1663 [inline]
 __sys_socketpair+0x239/0x560 net/socket.c:1814
 __do_sys_socketpair net/socket.c:1863 [inline]
 __se_sys_socketpair net/socket.c:1860 [inline]
 __x64_sys_socketpair+0x9b/0xb0 net/socket.c:1860
 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: 0033:0x7f86d619c799
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:00007f86d6fb4028 EFLAGS: 00000246 ORIG_RAX: 0000000000000035
RAX: ffffffffffffffda RBX: 00007f86d6415fa0 RCX: 00007f86d619c799
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 000000000000001e
RBP: 00007f86d6232c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000200000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f86d6416038 R14: 00007f86d6415fa0 R15: 00007ffc00dd1ba8
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 20823 Comm: kworker/u8:28 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:kasan_check_range+0x9/0x2c0 mm/kasan/generic.c:199
Code: c6 c9 ae 16 8e e8 57 47 f8 fe 90 0f 0b cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 40 d6 55 41 57 41 56 <41> 55 41 54 53 b0 01 48 85 f6 0f 84 ae 01 00 00 4c 8d 04 37 49 39
RSP: 0018:ffffc90000a08518 EFLAGS: 00000246
RAX: ffffc9000cc5ff48 RBX: 0000000000000010 RCX: ffffffff81768c9e
RDX: 0000000000000001 RSI: 0000000000000010 RDI: ffffc90000a08678
RBP: 0000000000000000 R08: 0000000000000003 R09: ffffffff8e75e5e0
R10: ffffc90000a08678 R11: ffffffff81b0c390 R12: ffffc90000a08678
R13: 1ffff920001410c7 R14: ffffc90000a08678 R15: ffffc90000a08670
FS:  0000000000000000(0000) GS:ffff88812555d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0d74de92f8 CR3: 000000000e54c000 CR4: 00000000003526f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 __asan_memset+0x22/0x50 mm/kasan/shadow.c:84
 unwind_next_frame+0xeae/0x23c0 arch/x86/kernel/unwind_orc.c:607
 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:4538 [inline]
 slab_alloc_node mm/slub.c:4866 [inline]
 kmem_cache_alloc_node_noprof+0x384/0x690 mm/slub.c:4918
 kmalloc_reserve net/core/skbuff.c:613 [inline]
 __alloc_skb+0x27d/0x7d0 net/core/skbuff.c:713
 __netdev_alloc_skb+0xc1/0x810 net/core/skbuff.c:775
 netdev_alloc_skb include/linux/skbuff.h:3485 [inline]
 dev_alloc_skb include/linux/skbuff.h:3498 [inline]
 __ieee80211_beacon_get+0xc06/0x1880 net/mac80211/tx.c:5658
 ieee80211_beacon_get_tim+0xbd/0x2c0 net/mac80211/tx.c:5780
 ieee80211_beacon_get include/net/mac80211.h:5720 [inline]
 mac80211_hwsim_beacon_tx+0x3c5/0x870 drivers/net/wireless/virtual/mac80211_hwsim.c:2361
 __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
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
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 b4 e6 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 5f e2 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 43 e2
RSP: 0018:ffffc9000cc5f700 EFLAGS: 00000293
RAX: ffffffff81b9bfed RBX: 1ffff110170c8525 RCX: ffff888067f68000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000cc5f840 R08: ffffffff9011b2b7 R09: 1ffffffff2023656
R10: dffffc0000000000 R11: fffffbfff2023657 R12: ffff8880b8642928
R13: dffffc0000000000 R14: ffff8880b873c000 R15: 0000000000000000
 on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1043
 on_each_cpu include/linux/smp.h:72 [inline]
 smp_text_poke_sync_each_cpu arch/x86/kernel/alternative.c:2761 [inline]
 smp_text_poke_batch_finish+0x5f5/0x1160 arch/x86/kernel/alternative.c:2971
 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146
 static_key_enable_cpuslocked+0x128/0x240 kernel/jump_label.c:210
 static_key_enable+0x1a/0x20 kernel/jump_label.c:223
 toggle_allocation_gate+0xab/0x290 mm/kfence/core.c:900
 process_one_work kernel/workqueue.c:3276 [inline]
 process_scheduled_works+0xb6e/0x18c0 kernel/workqueue.c:3359
 worker_thread+0xa53/0xfc0 kernel/workqueue.c:3440
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>