------------[ cut here ]------------ DEBUG_LOCKS_WARN_ON(1) WARNING: CPU: 0 PID: 8769 at kernel/locking/lockdep.c:231 hlock_class kernel/locking/lockdep.c:231 [inline] WARNING: CPU: 0 PID: 8769 at kernel/locking/lockdep.c:231 check_wait_context kernel/locking/lockdep.c:4772 [inline] WARNING: CPU: 0 PID: 8769 at kernel/locking/lockdep.c:231 __lock_acquire+0x58c/0x2040 kernel/locking/lockdep.c:5092 Modules linked in: CPU: 0 UID: 0 PID: 8769 Comm: syz-executor Not tainted 6.11.0-rc1-syzkaller-00233-g948752d2e010 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 RIP: 0010:hlock_class kernel/locking/lockdep.c:231 [inline] RIP: 0010:check_wait_context kernel/locking/lockdep.c:4772 [inline] RIP: 0010:__lock_acquire+0x58c/0x2040 kernel/locking/lockdep.c:5092 Code: 00 00 83 3d 85 26 a8 0e 00 75 23 90 48 c7 c7 80 d3 0a 8c 48 c7 c6 20 d6 0a 8c e8 bf d9 e5 ff 48 ba 00 00 00 00 00 fc ff df 90 <0f> 0b 90 90 90 31 db 48 81 c3 c4 00 00 00 48 89 d8 48 c1 e8 03 0f RSP: 0018:ffffc900000079d0 EFLAGS: 00010046 RAX: 7e3d0c3035268400 RBX: 0000000000001c20 RCX: ffff888062afda00 RDX: dffffc0000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 000000000000000a R08: ffffffff815592f2 R09: 1ffff1101724519a R10: dffffc0000000000 R11: ffffed101724519b R12: ffff888062afda00 R13: 0000000000001c20 R14: 1ffff1100c55fcaa R15: ffff888062afe550 FS: 0000555583b8e500(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007efc824f6d58 CR3: 0000000051f6e000 CR4: 0000000000350ef0 Call Trace: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5759 _raw_spin_lock_nested+0x31/0x40 kernel/locking/spinlock.c:378 raw_spin_rq_lock_nested+0xb0/0x140 kernel/sched/core.c:568 raw_spin_rq_lock kernel/sched/sched.h:1415 [inline] rq_lock kernel/sched/sched.h:1714 [inline] sched_tick+0x72/0x610 kernel/sched/core.c:5458 update_process_times+0x202/0x230 kernel/time/timer.c:2490 tick_sched_handle kernel/time/tick-sched.c:276 [inline] tick_nohz_handler+0x37c/0x500 kernel/time/tick-sched.c:297 __run_hrtimer kernel/time/hrtimer.c:1689 [inline] __hrtimer_run_queues+0x553/0xd50 kernel/time/hrtimer.c:1753 hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1815 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline] __sysvec_apic_timer_interrupt+0x112/0x3f0 arch/x86/kernel/apic/apic.c:1049 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:finish_task_switch+0x1ea/0x870 kernel/sched/core.c:5062 Code: c9 50 e8 19 b6 0b 00 48 83 c4 08 4c 89 f7 e8 7d 38 00 00 e9 de 04 00 00 4c 89 f7 e8 60 b9 5b 0a e8 8b d6 36 00 fb 48 8b 5d c0 <48> 8d bb f8 15 00 00 48 89 f8 48 c1 e8 03 49 be 00 00 00 00 00 fc RSP: 0018:ffffc900040b7148 EFLAGS: 00000286 RAX: 7e3d0c3035268400 RBX: ffff888062afda00 RCX: ffffffff81701e2a RDX: dffffc0000000000 RSI: ffffffff8c0ad4e0 RDI: ffffffff8c605b80 RBP: ffffc900040b7190 R08: ffffffff9372a80f R09: 1ffffffff26e5501 R10: dffffc0000000000 R11: fffffbfff26e5502 R12: 1ffff11017247ef3 R13: dffffc0000000000 R14: ffff8880b923ea00 R15: ffff8880b923f798 context_switch kernel/sched/core.c:5191 [inline] __schedule+0x1808/0x4a60 kernel/sched/core.c:6529 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:6851 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354 asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:707 RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:26 [inline] RIP: 0010:resched_offsets_ok kernel/sched/core.c:8384 [inline] RIP: 0010:__might_resched+0x130/0x780 kernel/sched/core.c:8401 Code: 0e 00 75 1f c6 05 3b db 9c 0e 01 48 c7 c7 00 5f 0a 8c be cf 20 00 00 48 c7 c2 80 67 0a 8c e8 c7 8b 0b 00 65 8b 1d 88 56 9f 7e <81> e3 ff ff ff 7f 65 48 8b 34 25 40 d7 03 00 4c 8d ae 44 04 00 00 RSP: 0018:ffffc900040b7520 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000080000000 RCX: ffff888062afda00 RDX: 0000000000000000 RSI: ffffffff8c0ae660 RDI: ffffffff8c605b80 RBP: ffffc900040b7638 R08: ffffffff9017acaf R09: 1ffffffff202f595 R10: dffffc0000000000 R11: fffffbfff202f596 R12: 0000000000000000 R13: 0000000002040dc0 R14: 0000000000000151 R15: 1ffff92000816eac might_alloc include/linux/sched/mm.h:337 [inline] slab_pre_alloc_hook mm/slub.c:3939 [inline] slab_alloc_node mm/slub.c:4017 [inline] __do_kmalloc_node mm/slub.c:4157 [inline] __kmalloc_node_noprof+0xd0/0x440 mm/slub.c:4164 kmalloc_array_node_noprof include/linux/slab.h:788 [inline] alloc_slab_obj_exts mm/slub.c:1976 [inline] account_slab mm/slub.c:2447 [inline] allocate_slab+0xb6/0x2f0 mm/slub.c:2502 new_slab mm/slub.c:2537 [inline] ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3723 __slab_alloc+0x58/0xa0 mm/slub.c:3813 __slab_alloc_node mm/slub.c:3866 [inline] slab_alloc_node mm/slub.c:4025 [inline] __kmalloc_cache_noprof+0x1d5/0x2c0 mm/slub.c:4184 kmalloc_noprof include/linux/slab.h:681 [inline] kzalloc_noprof include/linux/slab.h:807 [inline] ipv6_add_dev+0xf4/0x1220 net/ipv6/addrconf.c:384 addrconf_notify+0x6a7/0x1020 net/ipv6/addrconf.c:3653 notifier_call_chain+0x1a1/0x3e0 kernel/notifier.c:93 call_netdevice_notifiers_extack net/core/dev.c:2032 [inline] call_netdevice_notifiers net/core/dev.c:2046 [inline] register_netdevice+0x167f/0x1b00 net/core/dev.c:10469 register_netdev+0x3b/0x50 net/core/dev.c:10573 loopback_net_init+0x73/0x150 drivers/net/loopback.c:217 ops_init+0x35b/0x610 net/core/net_namespace.c:139 setup_net+0x515/0xca0 net/core/net_namespace.c:343 copy_net_ns+0x4e2/0x7b0 net/core/net_namespace.c:508 create_new_namespaces+0x425/0x7b0 kernel/nsproxy.c:110 unshare_nsproxy_namespaces+0x124/0x180 kernel/nsproxy.c:228 ksys_unshare+0x619/0xc10 kernel/fork.c:3309 __do_sys_unshare kernel/fork.c:3380 [inline] __se_sys_unshare kernel/fork.c:3378 [inline] __x64_sys_unshare+0x38/0x40 kernel/fork.c:3378 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc756f79157 Code: 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 10 01 00 00 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:00007ffd1ac39bd8 EFLAGS: 00000202 ORIG_RAX: 0000000000000110 RAX: ffffffffffffffda RBX: 00007fc757105f40 RCX: 00007fc756f79157 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000000 RBP: 00007fc757106a38 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 000000000000000c R13: 0000000000000003 R14: 0000000000000009 R15: 0000000000000009 ---------------- Code disassembly (best guess): 0: c9 leave 1: 50 push %rax 2: e8 19 b6 0b 00 call 0xbb620 7: 48 83 c4 08 add $0x8,%rsp b: 4c 89 f7 mov %r14,%rdi e: e8 7d 38 00 00 call 0x3890 13: e9 de 04 00 00 jmp 0x4f6 18: 4c 89 f7 mov %r14,%rdi 1b: e8 60 b9 5b 0a call 0xa5bb980 20: e8 8b d6 36 00 call 0x36d6b0 25: fb sti 26: 48 8b 5d c0 mov -0x40(%rbp),%rbx * 2a: 48 8d bb f8 15 00 00 lea 0x15f8(%rbx),%rdi <-- trapping instruction 31: 48 89 f8 mov %rdi,%rax 34: 48 c1 e8 03 shr $0x3,%rax 38: 49 rex.WB 39: be 00 00 00 00 mov $0x0,%esi 3e: 00 fc add %bh,%ah