------------[ cut here ]------------
WARNING: CPU: 1 PID: 438 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 1 PID: 438 Comm: kworker/u4:3 Not tainted 5.15.189-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Workqueue: netns cleanup_net
RIP: 0010:copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Code: 24 45 31 f6 31 ff 89 de e8 ed f7 d8 ff 85 db 48 c7 c0 f2 ff ff ff 49 0f 44 c6 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 70 f4 d8 ff <0f> 0b e9 1c ff ff ff 44 89 e1 80 e1 07 80 c1 03 38 c1 0f 8c ea fe
RSP: 0018:ffffc90000dcf878 EFLAGS: 00010246
RAX: ffffffff819ecfb0 RBX: 0000000000000002 RCX: ffff88801e9f5940
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: dffffc0000000000 R09: ffffed1003d3eb29
R10: ffffed1003d3eb29 R11: 1ffff11003d3eb28 R12: ffff88801e9f70c8
R13: 00007ffffffff000 R14: ffffc90000dcf8e8 R15: 0000000000000900
FS: 0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b31f63fff CR3: 0000000070a2d000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
bpf_probe_read_user_common kernel/trace/bpf_trace.c:157 [inline]
____bpf_probe_read_compat kernel/trace/bpf_trace.c:281 [inline]
bpf_probe_read_compat+0xdd/0x170 kernel/trace/bpf_trace.c:277
bpf_prog_1878750df62aa1fb+0x40/0x33c
bpf_dispatcher_nop_func include/linux/bpf.h:790 [inline]
__bpf_prog_run include/linux/filter.h:628 [inline]
bpf_prog_run include/linux/filter.h:635 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:1878 [inline]
bpf_trace_run4+0x188/0x330 kernel/trace/bpf_trace.c:1917
__bpf_trace_mm_page_alloc+0xbf/0xf0 include/trace/events/kmem.h:201
__traceiter_mm_page_alloc+0x35/0x50 include/trace/events/kmem.h:201
trace_mm_page_alloc include/trace/events/kmem.h:201 [inline]
__alloc_pages+0x449/0x470 mm/page_alloc.c:5496
stack_depot_save+0x342/0x440 lib/stackdepot.c:302
save_stack+0x101/0x1e0 mm/page_owner.c:120
__set_page_owner+0x41/0x2d0 mm/page_owner.c:181
prep_new_page mm/page_alloc.c:2426 [inline]
get_page_from_freelist+0x1b77/0x1c60 mm/page_alloc.c:4192
__alloc_pages+0x1e1/0x470 mm/page_alloc.c:5474
stack_depot_save+0x342/0x440 lib/stackdepot.c:302
kasan_save_stack mm/kasan/common.c:40 [inline]
kasan_set_track+0x62/0x70 mm/kasan/common.c:46
kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:360
____kasan_slab_free+0xd5/0x110 mm/kasan/common.c:366
kasan_slab_free include/linux/kasan.h:230 [inline]
slab_free_hook mm/slub.c:1705 [inline]
slab_free_freelist_hook+0xea/0x170 mm/slub.c:1731
slab_free mm/slub.c:3499 [inline]
kfree+0xef/0x2a0 mm/slub.c:4559
skb_free_head net/core/skbuff.c:655 [inline]
skb_release_data+0x6fe/0x850 net/core/skbuff.c:677
skb_release_all net/core/skbuff.c:742 [inline]
__kfree_skb net/core/skbuff.c:756 [inline]
consume_skb+0xa2/0x100 net/core/skbuff.c:914
netlink_broadcast_filtered+0x107a/0x1170 net/netlink/af_netlink.c:1534
netlink_broadcast net/netlink/af_netlink.c:1556 [inline]
nlmsg_multicast include/net/netlink.h:1033 [inline]
nlmsg_notify+0xec/0x1a0 net/netlink/af_netlink.c:2550
__neigh_notify+0x191/0x2e0 net/core/neighbour.c:3390
neigh_cleanup_and_release+0x9d/0x250 net/core/neighbour.c:101
neigh_del net/core/neighbour.c:197 [inline]
neigh_remove_one+0x4e8/0x5f0 net/core/neighbour.c:218
neigh_forced_gc net/core/neighbour.c:251 [inline]
neigh_alloc net/core/neighbour.c:429 [inline]
___neigh_create+0x468/0x2250 net/core/neighbour.c:591
ip6_finish_output2+0xa01/0x1500 net/ipv6/ip6_output.c:127
dst_output include/net/dst.h:452 [inline]
NF_HOOK include/linux/netfilter.h:302 [inline]
ndisc_send_skb+0xbea/0x14a0 net/ipv6/ndisc.c:513
addrconf_rs_timer+0x2b8/0x600 net/ipv6/addrconf.c:3957
call_timer_fn+0x16c/0x530 kernel/time/timer.c:1451
expire_timers kernel/time/timer.c:1496 [inline]
__run_timers+0x525/0x7c0 kernel/time/timer.c:1767
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1780
handle_softirqs+0x328/0x820 kernel/softirq.c:576
__do_softirq kernel/softirq.c:610 [inline]
invoke_softirq kernel/softirq.c:450 [inline]
__irq_exit_rcu+0x12f/0x220 kernel/softirq.c:659
irq_exit_rcu+0x5/0x20 kernel/softirq.c:671
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1108
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:should_resched arch/x86/include/asm/preempt.h:103 [inline]
RIP: 0010:__local_bh_enable_ip+0x132/0x1b0 kernel/softirq.c:408
Code: 8a e8 02 cd 5f 08 65 66 8b 05 1a 27 bb 7e 66 85 c0 75 54 bf 01 00 00 00 e8 6b fe 08 00 e8 76 70 35 00 fb 65 8b 05 06 fe b9 7e <85> c0 75 05 e8 b5 08 b8 ff 48 c7 04 24 0e 36 e0 45 4b c7 04 37 00
RSP: 0018:ffffc9000333f600 EFLAGS: 00000286
RAX: 0000000080000000 RBX: 0000000000000201 RCX: 07b5b99ea0636000
RDX: dffffc0000000000 RSI: ffffffff8a0b15c0 RDI: ffffffff8a599340
RBP: ffffc9000333f690 R08: dffffc0000000000 R09: fffffbfff1ff6e1a
R10: fffffbfff1ff6e1a R11: 1ffffffff1ff6e19 R12: ffffffff888c639f
R13: dffffc0000000000 R14: dffffc0000000000 R15: 1ffff92000667ec0
spin_unlock_bh include/linux/spinlock.h:408 [inline]
addrconf_ifdown+0x60f/0x1970 net/ipv6/addrconf.c:3830
addrconf_notify+0x445/0xf00 net/ipv6/addrconf.c:-1
notifier_call_chain kernel/notifier.c:83 [inline]
raw_notifier_call_chain+0xcb/0x160 kernel/notifier.c:391
call_netdevice_notifiers_extack net/core/dev.c:2061 [inline]
call_netdevice_notifiers net/core/dev.c:2075 [inline]
unregister_netdevice_many+0xf57/0x18f0 net/core/dev.c:11134
default_device_exit_batch+0x336/0x390 net/core/dev.c:11667
ops_exit_list net/core/net_namespace.c:177 [inline]
cleanup_net+0x77b/0xb80 net/core/net_namespace.c:635
process_one_work+0x863/0x1000 kernel/workqueue.c:2310
worker_thread+0xaa8/0x12a0 kernel/workqueue.c:2457
kthread+0x436/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
----------------
Code disassembly (best guess):
0: 8a e8 mov %al,%ch
2: 02 cd add %ch,%cl
4: 5f pop %rdi
5: 08 65 66 or %ah,0x66(%rbp)
8: 8b 05 1a 27 bb 7e mov 0x7ebb271a(%rip),%eax # 0x7ebb2728
e: 66 85 c0 test %ax,%ax
11: 75 54 jne 0x67
13: bf 01 00 00 00 mov $0x1,%edi
18: e8 6b fe 08 00 call 0x8fe88
1d: e8 76 70 35 00 call 0x357098
22: fb sti
23: 65 8b 05 06 fe b9 7e mov %gs:0x7eb9fe06(%rip),%eax # 0x7eb9fe30
* 2a: 85 c0 test %eax,%eax <-- trapping instruction
2c: 75 05 jne 0x33
2e: e8 b5 08 b8 ff call 0xffb808e8
33: 48 c7 04 24 0e 36 e0 movq $0x45e0360e,(%rsp)
3a: 45
3b: 4b rex.WXB
3c: c7 .byte 0xc7
3d: 04 37 add $0x37,%al