------------[ cut here ]------------
WARNING: CPU: 1 PID: 4188 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 1 PID: 4188 Comm: syz-executor Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Code: 24 45 31 f6 31 ff 89 de e8 fd 94 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 80 91 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:ffffc90000dcfd28 EFLAGS: 00010246
RAX: ffffffff81a08f90 RBX: 0000000000000000 RCX: ffff88807abd5940
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffc90000dd0157 R09: ffffc90000dd0124
R10: dffffc0000000000 R11: fffff520001ba02b R12: ffff88807abd70c8
R13: ffffc900012ca030 R14: ffffc90000dcfd88 R15: 0000000000000000
FS: 000055556248e500(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f36ff0ee158 CR3: 000000006521b000 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_user kernel/trace/bpf_trace.c:166 [inline]
bpf_probe_read_user+0x26/0x70 kernel/trace/bpf_trace.c:163
bpf_prog_f2594087b0f175cc+0x32/0xca4
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_prog_run_pin_on_cpu include/linux/filter.h:652 [inline]
bpf_flow_dissect+0x12b/0x3f0 net/core/flow_dissector.c:896
__skb_flow_dissect+0x792/0x60b0 net/core/flow_dissector.c:1024
skb_flow_dissect_flow_keys include/linux/skbuff.h:1390 [inline]
___skb_get_hash+0x55/0x680 net/core/flow_dissector.c:1583
__skb_get_hash+0xd2/0x270 net/core/flow_dissector.c:1648
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+0x12e/0x2e0 net/core/dev.c:4186
__dev_queue_xmit+0x756/0x2f80 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+0x1051/0x1510 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+0xc2a/0x1500 net/ipv6/ndisc.c:513
addrconf_rs_timer+0x2d1/0x630 net/ipv6/addrconf.c:3956
call_timer_fn+0x17b/0x540 kernel/time/timer.c:1648
expire_timers kernel/time/timer.c:1699 [inline]
__run_timers+0x53e/0x800 kernel/time/timer.c:1970
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1983
handle_softirqs+0x339/0x830 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+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:__seqprop_sequence include/linux/seqlock.h:261 [inline]
RIP: 0010:get_counters net/ipv4/netfilter/arp_tables.c:617 [inline]
RIP: 0010:alloc_counters+0x3ae/0x760 net/ipv4/netfilter/arp_tables.c:664
Code: 21 c6 0f 85 db 00 00 00 e8 7f 80 c6 f8 4c 8b 74 24 60 48 85 db 75 07 e8 70 80 c6 f8 eb 06 e8 69 80 c6 f8 fb 43 0f b6 44 3d 00 <84> c0 0f 85 c0 00 00 00 41 8b 1c 24 89 de 83 e6 01 31 ff e8 aa 83
RSP: 0018:ffffc90002e6f380 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000200 RCX: ffff88807abd5940
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90002e6f4b0 R08: ffffffff901d4157 R09: 1ffffffff203a82a
R10: dffffc0000000000 R11: fffffbfff203a82b R12: ffff8880b91393d0
R13: 1ffff1101722727a R14: ffffe8ffffda3038 R15: dffffc0000000000
copy_entries_to_user net/ipv6/netfilter/ip6_tables.c:839 [inline]
get_entries net/ipv6/netfilter/ip6_tables.c:1041 [inline]
do_ip6t_get_ctl+0xa36/0x1120 net/ipv6/netfilter/ip6_tables.c:1679
nf_getsockopt+0x25e/0x280 net/netfilter/nf_sockopt.c:116
ipv6_getsockopt+0x473/0x2470 net/ipv6/ipv6_sockglue.c:1492
tcp_getsockopt+0x200/0x25a0 net/ipv4/tcp.c:4322
__sys_getsockopt+0x1b0/0x230 net/socket.c:2256
__do_sys_getsockopt net/socket.c:2271 [inline]
__se_sys_getsockopt net/socket.c:2268 [inline]
__x64_sys_getsockopt+0xb1/0xc0 net/socket.c:2268
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f36feea4f6a
Code: 48 83 ec 10 89 d2 48 63 ff 45 31 c9 6a 2a 45 31 c0 31 c9 e8 d8 99 fb ff 48 83 c4 18 c3 0f 1f 00 49 89 ca b8 37 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 06 c3 0f 1f 44 00 00 48 c7 c2 e8 ff ff ff f7
RSP: 002b:00007ffd85c22498 EFLAGS: 00000216 ORIG_RAX: 0000000000000037
RAX: ffffffffffffffda RBX: 00007ffd85c22520 RCX: 00007f36feea4f6a
RDX: 0000000000000041 RSI: 0000000000000029 RDI: 0000000000000003
RBP: 0000000000000003 R08: 00007ffd85c224bc R09: 0000000000000000
R10: 00007ffd85c22520 R11: 0000000000000216 R12: 00007f36ff0ef4c0
R13: 00007ffd85c224bc R14: 0000000000000000 R15: 00007f36ff0f0fc0
----------------
Code disassembly (best guess):
0: 21 c6 and %eax,%esi
2: 0f 85 db 00 00 00 jne 0xe3
8: e8 7f 80 c6 f8 call 0xf8c6808c
d: 4c 8b 74 24 60 mov 0x60(%rsp),%r14
12: 48 85 db test %rbx,%rbx
15: 75 07 jne 0x1e
17: e8 70 80 c6 f8 call 0xf8c6808c
1c: eb 06 jmp 0x24
1e: e8 69 80 c6 f8 call 0xf8c6808c
23: fb sti
24: 43 0f b6 44 3d 00 movzbl 0x0(%r13,%r15,1),%eax
* 2a: 84 c0 test %al,%al <-- trapping instruction
2c: 0f 85 c0 00 00 00 jne 0xf2
32: 41 8b 1c 24 mov (%r12),%ebx
36: 89 de mov %ebx,%esi
38: 83 e6 01 and $0x1,%esi
3b: 31 ff xor %edi,%edi
3d: e8 .byte 0xe8
3e: aa stos %al,%es:(%rdi)
3f: 83 .byte 0x83