------------[ cut here ]------------
WARNING: CPU: 1 PID: 4340 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 1 PID: 4340 Comm: syz.3.25 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Code: 24 45 31 f6 31 ff 89 de e8 dd 99 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 60 96 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:ffffc90000dcfce8 EFLAGS: 00010246
RAX: ffffffff81a05c40 RBX: 0000000000000000 RCX: ffff88807b508000
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffc90000dd0117 R09: ffffc90000dd00e4
R10: dffffc0000000000 R11: fffff520001ba023 R12: ffff88807b509788
R13: ffffc900011b8030 R14: ffffc90000dcfd48 R15: 0000000000000000
FS: 00007f15ded916c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f15ded90ff8 CR3: 0000000029e53000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 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+0x32/0x7f4
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/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+0x1052/0x1530 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+0xb7a/0x1410 net/ipv6/ndisc.c:513
addrconf_rs_timer+0x367/0x640 net/ipv6/addrconf.c:3959
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+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:console_unlock+0xc90/0x10f0 kernel/printk/printk.c:2749
Code: 75 11 e8 83 d7 18 00 4d 85 e4 75 16 e8 79 d7 18 00 eb 15 e8 72 d7 18 00 e8 4d bb 59 08 4d 85 e4 74 ea e8 63 d7 18 00 fb 31 ff <89> de e8 b9 da 18 00 85 db 0f 94 c0 22 44 24 1f 3c 01 75 1f e8 47
RSP: 0018:ffffc9000329fa80 EFLAGS: 00000246
RAX: ffffffff81601b3d RBX: 0000000000000000 RCX: 0000000000080000
RDX: ffffc9000f4dc000 RSI: 000000000000129d RDI: 0000000000000000
RBP: ffffc9000329fcf0 R08: ffffffff901cb0c7 R09: 1ffffffff2039618
R10: dffffc0000000000 R11: fffffbfff2039619 R12: 0000000000000200
R13: 0000000000000044 R14: 0000000000000000 R15: dffffc0000000000
vprintk_emit+0xc0/0x150 kernel/printk/printk.c:2274
_printk+0xda/0x130 kernel/printk/printk.c:2299
__sock_create+0x849/0x910 net/socket.c:1446
sock_create net/socket.c:1552 [inline]
__sys_socket+0xe2/0x170 net/socket.c:1594
__do_sys_socket net/socket.c:1603 [inline]
__se_sys_socket net/socket.c:1601 [inline]
__x64_sys_socket+0x76/0x80 net/socket.c:1601
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: 0033:0x7f15e0b58e59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f15ded91028 EFLAGS: 00000246 ORIG_RAX: 0000000000000029
RAX: ffffffffffffffda RBX: 00007f15e0dd2090 RCX: 00007f15e0b58e59
RDX: 0000000000000002 RSI: 000000000000000a RDI: 0000000000000002
RBP: 00007f15e0beee6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f15e0dd2128 R14: 00007f15e0dd2090 R15: 00007ffec89280a8
----------------
Code disassembly (best guess):
0: 75 11 jne 0x13
2: e8 83 d7 18 00 call 0x18d78a
7: 4d 85 e4 test %r12,%r12
a: 75 16 jne 0x22
c: e8 79 d7 18 00 call 0x18d78a
11: eb 15 jmp 0x28
13: e8 72 d7 18 00 call 0x18d78a
18: e8 4d bb 59 08 call 0x859bb6a
1d: 4d 85 e4 test %r12,%r12
20: 74 ea je 0xc
22: e8 63 d7 18 00 call 0x18d78a
27: fb sti
28: 31 ff xor %edi,%edi
* 2a: 89 de mov %ebx,%esi <-- trapping instruction
2c: e8 b9 da 18 00 call 0x18daea
31: 85 db test %ebx,%ebx
33: 0f 94 c0 sete %al
36: 22 44 24 1f and 0x1f(%rsp),%al
3a: 3c 01 cmp $0x1,%al
3c: 75 1f jne 0x5d
3e: e8 .byte 0xe8
3f: 47 rex.RXB