------------[ cut here ]------------
WARNING: CPU: 0 PID: 4344 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 0 PID: 4344 Comm: syz.4.8 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Code: 24 45 31 f6 31 ff 89 de e8 6d 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 f0 f3 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: 0000:ffffc900000071a8 EFLAGS: 00010246
RAX: ffffffff819ed660 RBX: 0000000000000000 RCX: ffff88802abc0000
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: dffffc0000000000 R09: fffffbfff1ff7a19
R10: fffffbfff1ff7a19 R11: 1ffffffff1ff7a18 R12: ffff88802abc1788
R13: 1ffff92000000e44 R14: ffffc90000007208 R15: 0000000000000000
FS:  00007fcf1a77b6c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcf1307c000 CR3: 0000000075057000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 bpf_probe_read_user_common kernel/trace/bpf_trace.c:157 [inline]
 ____bpf_probe_read_user kernel/trace/bpf_trace.c:166 [inline]
 bpf_probe_read_user+0x26/0x70 kernel/trace/bpf_trace.c:163
 bpf_prog_690f12e098ef46de+0x32/0x7b4
 bpf_dispatcher_nop_func include/linux/bpf.h:888 [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_run3+0x17e/0x320 kernel/trace/bpf_trace.c:1916
 __bpf_trace_kmem_cache_free+0x99/0xc0 include/trace/events/kmem.h:138
 trace_kmem_cache_free include/trace/events/kmem.h:138 [inline]
 kmem_cache_free+0x1e7/0x210 mm/slub.c:3521
 kfree_skb include/linux/skbuff.h:1118 [inline]
 batadv_interface_tx+0x82a/0x1410 net/batman-adv/soft-interface.c:388
 __netdev_start_xmit include/linux/netdevice.h:5027 [inline]
 netdev_start_xmit include/linux/netdevice.h:5041 [inline]
 xmit_one net/core/dev.c:3649 [inline]
 dev_hard_start_xmit+0x2a5/0x7e0 net/core/dev.c:3665
 __dev_queue_xmit+0x19df/0x2ed0 net/core/dev.c:4288
 neigh_hh_output include/net/neighbour.h:493 [inline]
 neigh_output include/net/neighbour.h:507 [inline]
 ip6_finish_output2+0x1035/0x1500 net/ipv6/ip6_output.c:130
 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:3956
 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
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:debug_lockdep_rcu_enabled+0x0/0x30 kernel/rcu/update.c:279
Code: 95 c0 03 00 75 e8 48 c7 c7 c0 16 0b 8a 48 c7 c6 40 3b 0b 8a e8 c1 33 f5 ff 0f 0b eb d1 00 00 cc cc 00 00 cc cc 00 00 cc cc 00 <31> c0 83 3d 7b 62 c0 03 00 74 1d 83 3d f2 94 c0 03 00 74 14 65 48
RSP: 0000:ffffc90003527bf8 EFLAGS: 00000287
RAX: ffffffff81ac477c RBX: 0000000000000000 RCX: 0000000000080000
RDX: ffffc9000f5ef000 RSI: 000000000004dabd RDI: 000000000004dabe
RBP: ffffc90003527cb0 R08: dffffc0000000000 R09: fffffbfff1ff7a1f
R10: fffffbfff1ff7a1f R11: 1ffffffff1ff7a1e R12: dffffc0000000000
R13: 1ffff920006a4f80 R14: ffff88805fa7c000 R15: 0000000000000200
 rcu_read_unlock include/linux/rcupdate.h:768 [inline]
 count_memcg_event_mm+0x292/0x360 include/linux/memcontrol.h:1082
 handle_mm_fault+0x12d/0x43c0 mm/memory.c:4863
 do_user_addr_fault+0x489/0xc80 arch/x86/mm/fault.c:1357
 handle_page_fault arch/x86/mm/fault.c:1445 [inline]
 exc_page_fault+0x60/0x100 arch/x86/mm/fault.c:1501
 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:606
RIP: 0033:0x7fcf1c417ca6
Code: f0 72 6e 48 63 cd 48 01 c1 49 39 4f 08 72 4c 8d 4d ff 85 ed 74 33 66 0f 1f 44 00 00 48 39 f0 72 1b 4d 8b 07 49 89 c1 49 29 f1 <47> 0f b6 0c 08 45 84 c9 74 08 45 88 0c 00 49 8b 47 10 48 83 c0 01
RSP: 002b:00007fcf1a77a4a0 EFLAGS: 00010206
RAX: 0000000000d21001 RBX: 00007fcf1a77a540 RCX: 000000000000009f
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 00007fcf1a77a5e0
RBP: 0000000000000102 R08: 00007fcf1235b000 R09: 0000000000d21000
R10: 0000000000000000 R11: 00007fcf1a77a550 R12: 0000000000000001
R13: 00007fcf1c5f4b80 R14: 0000000000000000 R15: 00007fcf1a77a5e0
 </TASK>