------------[ cut here ]------------
WARNING: CPU: 1 PID: 4601 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 1 PID: 4601 Comm: kworker/u4:22 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Workqueue: bat_events batadv_nc_worker
RIP: 0010:copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Code: 24 45 31 f6 31 ff 89 de e8 0d f6 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 90 f2 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:ffffc90000dcfa48 EFLAGS: 00010246
RAX: ffffffff819ed980 RBX: 0000000000000000 RCX: ffff88807d929dc0
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: dffffc0000000000 R09: ffffc90000dcfe44
R10: fffff520001b9fcf R11: 1ffff920001b9fc8 R12: ffff88807d92b548
R13: ffffc90001139030 R14: ffffc90000dcfaa8 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000005e69b000 CR4: 00000000003506e0
DR0: 0000200000000300 DR1: 0000200000000300 DR2: 0000200000000300
DR3: 0000200000000300 DR6: 00000000ffff0ff1 DR7: 0000000000000600
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+0x32/0x948
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+0x79f/0x5af0 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+0xb4/0x220 net/core/flow_dissector.c:1648
skb_get_hash include/linux/skbuff.h:1432 [inline]
udp_flow_src_port include/net/udp.h:230 [inline]
geneve6_xmit_skb drivers/net/geneve.c:1031 [inline]
geneve_xmit+0x883/0x3070 drivers/net/geneve.c:1116
__netdev_start_xmit include/linux/netdevice.h:5036 [inline]
netdev_start_xmit include/linux/netdevice.h:5050 [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
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 85 59 08 65 66 8b 05 8a 25 bb 7e 66 85 c0 75 54 bf 01 00 00 00 e8 ab fe 08 00 e8 66 76 35 00 fb 65 8b 05 36 fc b9 7e <85> c0 75 05 e8 45 07 b8 ff 48 c7 04 24 0e 36 e0 45 4b c7 04 37 00
RSP: 0018:ffffc9000350faa0 EFLAGS: 00000286
RAX: 0000000080000000 RBX: 0000000000000201 RCX: 4e61b3680db37900
RDX: dffffc0000000000 RSI: ffffffff8a0b1be0 RDI: ffffffff8a59e800
RBP: ffffc9000350fb38 R08: dffffc0000000000 R09: fffffbfff1ff5437
R10: fffffbfff1ff5437 R11: 1ffffffff1ff5436 R12: ffffffff89779786
R13: dffffc0000000000 R14: dffffc0000000000 R15: 1ffff920006a1f54
spin_unlock_bh include/linux/spinlock.h:409 [inline]
batadv_nc_purge_paths+0x316/0x3b0 net/batman-adv/network-coding.c:475
batadv_nc_worker+0x2e7/0x5c0 net/batman-adv/network-coding.c:724
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 85 59 08 65 66 add 0x66650859(%rbp),%al
8: 8b 05 8a 25 bb 7e mov 0x7ebb258a(%rip),%eax # 0x7ebb2598
e: 66 85 c0 test %ax,%ax
11: 75 54 jne 0x67
13: bf 01 00 00 00 mov $0x1,%edi
18: e8 ab fe 08 00 call 0x8fec8
1d: e8 66 76 35 00 call 0x357688
22: fb sti
23: 65 8b 05 36 fc b9 7e mov %gs:0x7eb9fc36(%rip),%eax # 0x7eb9fc60
* 2a: 85 c0 test %eax,%eax <-- trapping instruction
2c: 75 05 jne 0x33
2e: e8 45 07 b8 ff call 0xffb80778
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