------------[ cut here ]------------ WARNING: CPU: 0 PID: 4341 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226 Modules linked in: CPU: 0 PID: 4341 Comm: syz.0.14 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026 RIP: 0010:copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226 Code: 24 45 31 f6 31 ff 89 de e8 4d 7a 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 d0 76 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:ffffc90002e8ec28 EFLAGS: 00010246 RAX: ffffffff81a0ac90 RBX: 0000000000000000 RCX: ffff88802a83bb80 RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffffc90002e8f057 R09: ffffc90002e8f024 R10: dffffc0000000000 R11: fffff520005d1e0b R12: ffff88802a83d328 R13: ffffc900011aa030 R14: ffffc90002e8ec88 R15: 0000000000000000 FS: 00007fd9598c56c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd951900000 CR3: 000000007e32e000 CR4: 00000000003506f0 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_user kernel/trace/bpf_trace.c:166 [inline] bpf_probe_read_user+0x26/0x70 kernel/trace/bpf_trace.c:163 bpf_prog_f2594087b0f175cc+0x32/0xba8 bpf_dispatcher_nop_func include/linux/bpf.h:890 [inline] __bpf_prog_run include/linux/filter.h:628 [inline] bpf_prog_run include/linux/filter.h:635 [inline] bpf_prog_run_pin_on_cpu include/linux/filter.h:652 [inline] bpf_flow_dissect+0x12b/0x3e0 net/core/flow_dissector.c:896 __skb_flow_dissect+0x7cc/0x6180 net/core/flow_dissector.c:1029 skb_flow_dissect_flow_keys include/linux/skbuff.h:1390 [inline] ___skb_get_hash+0x55/0x680 net/core/flow_dissector.c:1638 __skb_get_hash+0xd2/0x270 net/core/flow_dissector.c:1703 skb_get_hash include/linux/skbuff.h:1432 [inline] skb_tx_hash net/core/dev.c:3256 [inline] netdev_pick_tx+0x335/0xad0 net/core/dev.c:4153 netdev_core_pick_tx+0x141/0x300 net/core/dev.c:4186 __dev_queue_xmit+0x797/0x2e50 net/core/dev.c:4261 neigh_hh_output include/net/neighbour.h:493 [inline] neigh_output include/net/neighbour.h:507 [inline] ip6_finish_output2+0x1134/0x1640 net/ipv6/ip6_output.c:132 dst_output include/net/dst.h:452 [inline] NF_HOOK include/linux/netfilter.h:302 [inline] ndisc_send_skb+0xb7c/0x1410 net/ipv6/ndisc.c:513 addrconf_rs_timer+0x367/0x640 net/ipv6/addrconf.c:3974 call_timer_fn+0x17b/0x540 kernel/time/timer.c:1648 expire_timers kernel/time/timer.c:1699 [inline] __run_timers+0x56c/0x810 kernel/time/timer.c:1970 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1983 handle_softirqs+0x336/0x830 kernel/softirq.c:576 __do_softirq kernel/softirq.c:610 [inline] invoke_softirq kernel/softirq.c:450 [inline] __irq_exit_rcu+0x13b/0x230 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+0x52/0xc0 arch/x86/kernel/apic/apic.c:1108 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676 RIP: 0033:0x7fd95b52428b Code: cd 48 01 c1 49 39 4f 08 72 54 8d 4d ff 85 ed 74 3b 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 RSP: 002b:00007fd9598c4470 EFLAGS: 00000202 RAX: 000000000045b868 RBX: 00007fd9598c4530 RCX: 0000000000000081 RDX: 0000000000000055 RSI: 0000000000000001 RDI: 00007fd9598c45d0 RBP: 0000000000000102 R08: 00007fd9514a5000 R09: 000000000045b868 R10: 0000000000000000 R11: 00007fd9598c4540 R12: 0000000000000001 R13: 00007fd95b7249e0 R14: 0000000000000000 R15: 00007fd9598c45d0