------------[ cut here ]------------
WARNING: CPU: 0 PID: 30930 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 0 PID: 30930 Comm: kworker/u4:2 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
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 7d 90 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 00 8d 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:ffffc90000006288 EFLAGS: 00010246
RAX: ffffffff81a0a790 RBX: 0000000000000000 RCX: ffff8880234a1dc0
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffc900000066b7 R09: ffffc90000006684
R10: dffffc0000000000 R11: fffff52000000cd7 R12: ffff8880234a3548
R13: ffffc90000cc0030 R14: ffffc900000062e8 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc66324e4c0 CR3: 0000000061948000 CR4: 00000000003506f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 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+0x32/0x124
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
__bond_start_xmit drivers/net/bonding/bond_main.c:-1 [inline]
bond_start_xmit+0x1230/0x1ad0 drivers/net/bonding/bond_main.c:5180
__netdev_start_xmit include/linux/netdevice.h:5036 [inline]
netdev_start_xmit include/linux/netdevice.h:5050 [inline]
xmit_one net/core/dev.c:3662 [inline]
dev_hard_start_xmit+0x2a5/0x7e0 net/core/dev.c:3678
__dev_queue_xmit+0x1a9b/0x2f80 net/core/dev.c:4305
NF_HOOK+0x2fe/0x380 include/linux/netfilter.h:302
arp_xmit+0x142/0x230 net/ipv4/arp.c:643
arp_solicit+0xba5/0xde0 net/ipv4/arp.c:391
neigh_probe net/core/neighbour.c:1017 [inline]
__neigh_event_send+0xede/0x1470 net/core/neighbour.c:1178
neigh_event_send include/net/neighbour.h:438 [inline]
neigh_resolve_output+0x1b3/0x6a0 net/core/neighbour.c:1488
neigh_output include/net/neighbour.h:509 [inline]
ip_finish_output2+0xcbf/0x10a0 net/ipv4/ip_output.c:228
NF_HOOK_COND include/linux/netfilter.h:291 [inline]
ip_output+0x2c0/0x3e0 net/ipv4/ip_output.c:434
dst_output include/net/dst.h:452 [inline]
ip_local_out net/ipv4/ip_output.c:126 [inline]
__ip_queue_xmit+0x11c1/0x1c00 net/ipv4/ip_output.c:538
__tcp_transmit_skb+0x1d11/0x3200 net/ipv4/tcp_output.c:1404
tcp_transmit_skb net/ipv4/tcp_output.c:1422 [inline]
__tcp_retransmit_skb+0x92c/0x1290 net/ipv4/tcp_output.c:3278
tcp_retransmit_skb+0x2e/0x350 net/ipv4/tcp_output.c:3301
tcp_xmit_retransmit_queue+0x605/0xc60 net/ipv4/tcp_output.c:3383
tcp_tsq_write+0x1c7/0x320 net/ipv4/tcp_output.c:1018
tcp_tsq_handler+0x11e/0x1f0 net/ipv4/tcp_output.c:1030
tcp_tasklet_func+0x3f2/0x480 net/ipv4/tcp_output.c:1062
tasklet_action_common+0x2ad/0x410 kernel/softirq.c:806
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:lock_acquire+0x208/0x400 kernel/locking/lockdep.c:5627
Code: f7 84 24 80 00 00 00 00 02 00 00 43 c6 44 3d 04 f8 0f 85 f1 00 00 00 41 f7 c6 00 02 00 00 74 01 fb 48 c7 44 24 60 0e 36 e0 45 <4b> c7 44 3d 00 00 00 00 00 43 c7 44 3d 08 00 00 00 00 65 48 8b 04
RSP: 0018:ffffc9000347faa0 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 0000000000000000 RCX: 4fe44d402b1a8b00
RDX: 0000000000000000 RSI: ffffffff8a2b3aa0 RDI: ffffffff8a79fe40
RBP: ffffc9000347fbc0 R08: dffffc0000000000 R09: 1ffffffff203aa18
R10: dffffc0000000000 R11: fffffbfff203aa19 R12: ffffffff8c31eb20
R13: 1ffff9200068ff60 R14: 0000000000000246 R15: dffffc0000000000
rcu_lock_acquire+0x2a/0x30 include/linux/rcupdate.h:313
rcu_read_lock include/linux/rcupdate.h:740 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:412 [inline]
batadv_nc_worker+0xc9/0x5c0 net/batman-adv/network-coding.c:723
process_one_work+0x85f/0x1010 kernel/workqueue.c:2310
worker_thread+0xaa6/0x1290 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: f7 84 24 80 00 00 00 testl $0x200,0x80(%rsp)
7: 00 02 00 00
b: 43 c6 44 3d 04 f8 movb $0xf8,0x4(%r13,%r15,1)
11: 0f 85 f1 00 00 00 jne 0x108
17: 41 f7 c6 00 02 00 00 test $0x200,%r14d
1e: 74 01 je 0x21
20: fb sti
21: 48 c7 44 24 60 0e 36 movq $0x45e0360e,0x60(%rsp)
28: e0 45
* 2a: 4b c7 44 3d 00 00 00 movq $0x0,0x0(%r13,%r15,1) <-- trapping instruction
31: 00 00
33: 43 c7 44 3d 08 00 00 movl $0x0,0x8(%r13,%r15,1)
3a: 00 00
3c: 65 gs
3d: 48 rex.W
3e: 8b .byte 0x8b
3f: 04 .byte 0x4