------------[ cut here ]------------
WARNING: CPU: 0 PID: 27876 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 0 PID: 27876 Comm: syz.3.6546 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Code: 24 45 31 f6 31 ff 89 de e8 3d f7 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 c0 f3 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:ffffc90000006d48 EFLAGS: 00010006
RAX: ffffffff819ed760 RBX: 0000000000000008 RCX: ffff8880406b3b80
RDX: 0000000000010100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff8eed1008 R09: ffffffff8eed1018
R10: ffffffff8eed1010 R11: ffffffff8eed1003 R12: ffff8880406b5308
R13: dffffc0000000000 R14: ffffc90000006da8 R15: ffffffff83000002
FS: 00007f341e7a86c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001340 CR3: 0000000055d6b000 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_8fba032c6732d8fd+0x3d/0xce0
bpf_dispatcher_nop_func include/linux/bpf.h:888 [inline]
__bpf_prog_run include/linux/filter.h:621 [inline]
bpf_prog_run include/linux/filter.h:635 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:1878 [inline]
bpf_trace_run5+0x2b8/0x370 kernel/trace/bpf_trace.c:1918
trace_signal_generate+0x16b/0x1c0 include/trace/events/signal.h:50
__send_signal+0x5d0/0xdb0 kernel/signal.c:1184
do_send_sig_info kernel/signal.c:1294 [inline]
group_send_sig_info+0x1c6/0x220 kernel/signal.c:1442
do_bpf_send_signal+0x7b/0x150 kernel/trace/bpf_trace.c:779
irq_work_single kernel/irq_work.c:155 [inline]
irq_work_run_list+0x1bb/0x330 kernel/irq_work.c:177
irq_work_run+0x63/0xe0 kernel/irq_work.c:186
__sysvec_irq_work+0x98/0x240 arch/x86/kernel/irq_work.c:22
instr_sysvec_irq_work arch/x86/kernel/irq_work.c:17 [inline]
sysvec_irq_work+0x4a/0xc0 arch/x86/kernel/irq_work.c:17
asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:713
RIP: 0010:arch_static_branch arch/x86/include/asm/jump_label.h:27 [inline]
RIP: 0010:static_key_false include/linux/jump_label.h:212 [inline]
RIP: 0010:native_write_msr arch/x86/include/asm/msr.h:156 [inline]
RIP: 0010:wrmsr arch/x86/include/asm/msr.h:263 [inline]
RIP: 0010:native_apic_msr_write+0x35/0x50 arch/x86/include/asm/apic.h:208
Code: 74 2a 83 ff 30 74 25 eb 10 81 ff d0 00 00 00 74 1b 81 ff e0 00 00 00 74 13 c1 ef 04 81 c7 00 08 00 00 89 f9 89 f0 31 d2 0f 30 <66> 90 c3 89 f6 31 d2 e9 ff b6 c7 02 66 2e 0f 1f 84 00 00 00 00 00
RSP: 0018:ffffc90000007190 EFLAGS: 00000246
RAX: 00000000000000f6 RBX: ffffffff8bbc2a20 RCX: 000000000000083f
RDX: 0000000000000000 RSI: 00000000000000f6 RDI: 000000000000083f
RBP: 0000000000000000 R08: dffffc0000000000 R09: ffffed10172067af
R10: ffffed10172067af R11: 1ffff110172067ae R12: ffff8880b9033b01
R13: dffffc0000000000 R14: dffffc0000000000 R15: 0000000000000020
arch_irq_work_raise+0x82/0xd0 arch/x86/kernel/irq_work.c:31
irq_work_queue+0x95/0x140 kernel/irq_work.c:75
bpf_send_signal_common+0x2b2/0x420 kernel/trace/bpf_trace.c:820
____bpf_send_signal_thread kernel/trace/bpf_trace.c:841 [inline]
bpf_send_signal_thread+0x12/0x20 kernel/trace/bpf_trace.c:839
bpf_prog_5197b192823fa451+0x1a/0x6ec
bpf_dispatcher_nop_func include/linux/bpf.h:888 [inline]
__bpf_prog_run include/linux/filter.h:621 [inline]
bpf_prog_run include/linux/filter.h:635 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:1878 [inline]
bpf_trace_run4+0x27e/0x330 kernel/trace/bpf_trace.c:1917
trace_fib6_table_lookup+0x159/0x1b0 include/trace/events/fib6.h:13
fib6_table_lookup+0xa20/0xa70 net/ipv6/route.c:2196
ip6_pol_route+0x209/0x1290 net/ipv6/route.c:2219
pol_lookup_func include/net/ip6_fib.h:582 [inline]
fib6_rule_lookup+0x1d3/0x570 net/ipv6/fib6_rules.c:115
ip6_route_input_lookup net/ipv6/route.c:2289 [inline]
ip6_route_input+0x6bf/0xa40 net/ipv6/route.c:2585
ip6_rcv_finish+0x136/0x240 net/ipv6/ip6_input.c:77
NF_HOOK+0x2d6/0x360 include/linux/netfilter.h:302
__netif_receive_skb_one_core net/core/dev.c:5525 [inline]
__netif_receive_skb+0xcc/0x290 net/core/dev.c:5639
process_backlog+0x364/0x780 net/core/dev.c:6516
__napi_poll+0xc0/0x430 net/core/dev.c:7075
napi_poll net/core/dev.c:7142 [inline]
net_rx_action+0x4a8/0x9c0 net/core/dev.c:7232
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:console_unlock+0xd90/0x1200 kernel/printk/printk.c:2749
Code: 00 48 83 7c 24 28 00 75 19 e8 1c 95 18 00 eb 18 e8 15 95 18 00 e8 50 b8 49 08 48 83 7c 24 28 00 74 e7 e8 03 95 18 00 fb 31 ff <89> de e8 59 98 18 00 85 db 0f 94 c0 22 44 24 17 3c 01 75 1f e8 e7
RSP: 0018:ffffc9000329e840 EFLAGS: 00000246
RAX: ffffffff815f361d RBX: 0000000000000000 RCX: ffff8880406b3b80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000329eab0 R08: dffffc0000000000 R09: fffffbfff1ff7819
R10: fffffbfff1ff7819 R11: 1ffffffff1ff7818 R12: 1ffffffff194c6ad
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffffffff194c6a6
vprintk_emit+0xc0/0x150 kernel/printk/printk.c:2274
_printk+0xcc/0x110 kernel/printk/printk.c:2299
__nla_validate_parse+0x1f2d/0x2750 lib/nlattr.c:603
__nla_parse+0x3c/0x50 lib/nlattr.c:688
__nlmsg_parse include/net/netlink.h:733 [inline]
nlmsg_parse_deprecated include/net/netlink.h:772 [inline]
__rtnl_newlink net/core/rtnetlink.c:3329 [inline]
rtnl_newlink+0x272/0x17d0 net/core/rtnetlink.c:3572
rtnetlink_rcv_msg+0x9b9/0xe60 net/core/rtnetlink.c:5650
netlink_rcv_skb+0x1e0/0x430 net/netlink/af_netlink.c:2507
netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
netlink_unicast+0x774/0x920 net/netlink/af_netlink.c:1344
netlink_sendmsg+0x8ab/0xbc0 net/netlink/af_netlink.c:1918
sock_sendmsg_nosec net/socket.c:704 [inline]
__sock_sendmsg net/socket.c:716 [inline]
____sys_sendmsg+0x5a2/0x8c0 net/socket.c:2436
___sys_sendmsg+0x1f0/0x260 net/socket.c:2490
__sys_sendmsg net/socket.c:2519 [inline]
__do_sys_sendmsg net/socket.c:2528 [inline]
__se_sys_sendmsg+0x190/0x250 net/socket.c:2526
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: 0033:0x7f3420561ba9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f341e7a8038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f34207a9090 RCX: 00007f3420561ba9
RDX: 0000000000000000 RSI: 0000200000000040 RDI: 000000000000000d
RBP: 00007f34205e4e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f34207a9128 R14: 00007f34207a9090 R15: 00007ffedac201f8
----------------
Code disassembly (best guess):
0: 74 2a je 0x2c
2: 83 ff 30 cmp $0x30,%edi
5: 74 25 je 0x2c
7: eb 10 jmp 0x19
9: 81 ff d0 00 00 00 cmp $0xd0,%edi
f: 74 1b je 0x2c
11: 81 ff e0 00 00 00 cmp $0xe0,%edi
17: 74 13 je 0x2c
19: c1 ef 04 shr $0x4,%edi
1c: 81 c7 00 08 00 00 add $0x800,%edi
22: 89 f9 mov %edi,%ecx
24: 89 f0 mov %esi,%eax
26: 31 d2 xor %edx,%edx
28: 0f 30 wrmsr
* 2a: 66 90 xchg %ax,%ax <-- trapping instruction
2c: c3 ret
2d: 89 f6 mov %esi,%esi
2f: 31 d2 xor %edx,%edx
31: e9 ff b6 c7 02 jmp 0x2c7b735
36: 66 2e 0f 1f 84 00 00 cs nopw 0x0(%rax,%rax,1)
3d: 00 00 00