------------[ cut here ]------------
WARNING: CPU: 0 PID: 5656 at net/ipv4/route.c:1241 ip_rt_bug+0x2c/0x110 net/ipv4/route.c:1241
Modules linked in:
CPU: 0 UID: 0 PID: 5656 Comm: syz.1.89 Not tainted 6.11.0-rc1-syzkaller-00266-g45160cebd6ac #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
RIP: 0010:ip_rt_bug+0x2c/0x110 net/ipv4/route.c:1241
Code: 1e fa 41 57 41 56 41 55 41 54 53 48 89 d3 e8 cb ef 82 f7 66 90 e8 c4 ef 82 f7 31 ff 48 89 de ba 02 00 00 00 e8 f5 a5 6b ff 90 <0f> 0b 90 31 c0 5b 41 5c 41 5d 41 5e 41 5f c3 cc cc cc cc f3 0f 1e
RSP: 0018:ffffc90000007680 EFLAGS: 00010286
RAX: cecccc1b58d94b00 RBX: ffff88801c3a5280 RCX: ffffffff81701e2a
RDX: dffffc0000000000 RSI: ffffffff8c0ad560 RDI: ffffffff8c605c00
RBP: 0000000000000001 R08: ffffffff9372989f R09: 1ffffffff26e5313
R10: dffffc0000000000 R11: fffffbfff26e5314 R12: dffffc0000000000
R13: dffffc0000000000 R14: ffff888024203b80 R15: ffff888017b19a00
FS: 00007f09513d66c0(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000007c30a000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
ip_local_out net/ipv4/ip_output.c:129 [inline]
ip_send_skb net/ipv4/ip_output.c:1495 [inline]
ip_push_pending_frames+0xbf/0x150 net/ipv4/ip_output.c:1515
__icmp_send+0xf89/0x14e0 net/ipv4/icmp.c:777
ipv4_send_dest_unreach net/ipv4/route.c:1221 [inline]
ipv4_link_failure+0x62f/0xa10 net/ipv4/route.c:1228
dst_link_failure include/net/dst.h:429 [inline]
arp_error_report+0x114/0x160 net/ipv4/arp.c:296
neigh_invalidate+0x244/0x470 net/core/neighbour.c:1061
neigh_timer_handler+0x8a5/0xfd0 net/core/neighbour.c:1148
call_timer_fn+0x18e/0x650 kernel/time/timer.c:1792
expire_timers kernel/time/timer.c:1843 [inline]
__run_timers kernel/time/timer.c:2417 [inline]
__run_timer_base+0x66a/0x8e0 kernel/time/timer.c:2428
run_timer_base kernel/time/timer.c:2437 [inline]
run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2447
handle_softirqs+0x2c4/0x970 kernel/softirq.c:554
__do_softirq kernel/softirq.c:588 [inline]
invoke_softirq kernel/softirq.c:428 [inline]
__irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637
irq_exit_rcu+0x9/0x30 kernel/softirq.c:649
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1043
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:get_current arch/x86/include/asm/current.h:49 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x8/0x70 kernel/kcov.c:206
Code: 8b 3d 9c cc 95 0c 48 89 de 5b e9 73 87 5b 00 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 <65> 48 8b 0c 25 40 d7 03 00 65 8b 15 c0 70 70 7e f7 c2 00 01 ff 00
RSP: 0018:ffffc900092cf488 EFLAGS: 00000282
RAX: ffffffff82350bba RBX: ffffc900092cf564 RCX: ffff888022e0da00
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000001
RBP: 0000000000000000 R08: ffffffff8eaae9a3 R09: 1ffffffff1d55d34
R10: dffffc0000000000 R11: fffffbfff1d55d35 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff88805d601580 R15: ffff88805d601500
sysctl_mkdir_p fs/proc/proc_sysctl.c:1287 [inline]
__register_sysctl_table+0x128a/0x1550 fs/proc/proc_sysctl.c:1379
__devinet_sysctl_register+0x1dc/0x2a0 net/ipv4/devinet.c:2602
devinet_sysctl_register+0x17e/0x1f0 net/ipv4/devinet.c:2642
inetdev_init+0x296/0x4d0 net/ipv4/devinet.c:291
inetdev_event+0x338/0x15c0 net/ipv4/devinet.c:1565
notifier_call_chain+0x19f/0x3e0 kernel/notifier.c:93
call_netdevice_notifiers_extack net/core/dev.c:2032 [inline]
call_netdevice_notifiers net/core/dev.c:2046 [inline]
register_netdevice+0x167f/0x1b00 net/core/dev.c:10469
__ip_tunnel_create+0x2b4/0x380 net/ipv4/ip_tunnel.c:266
ip_tunnel_init_net+0x21c/0x710 net/ipv4/ip_tunnel.c:1159
ops_init+0x31e/0x590 net/core/net_namespace.c:139
setup_net+0x287/0x9e0 net/core/net_namespace.c:356
copy_net_ns+0x33f/0x560 net/core/net_namespace.c:494
create_new_namespaces+0x425/0x7b0 kernel/nsproxy.c:110
unshare_nsproxy_namespaces+0x124/0x180 kernel/nsproxy.c:228
ksys_unshare+0x619/0xc10 kernel/fork.c:3309
__do_sys_unshare kernel/fork.c:3380 [inline]
__se_sys_unshare kernel/fork.c:3378 [inline]
__x64_sys_unshare+0x38/0x40 kernel/fork.c:3378
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f09505779f9
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:00007f09513d6048 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 00007f0950705f80 RCX: 00007f09505779f9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000062040200
RBP: 00007f09505e58ee R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f0950705f80 R15: 00007fffdfb6b298
----------------
Code disassembly (best guess):
0: 8b 3d 9c cc 95 0c mov 0xc95cc9c(%rip),%edi # 0xc95cca2
6: 48 89 de mov %rbx,%rsi
9: 5b pop %rbx
a: e9 73 87 5b 00 jmp 0x5b8782
f: 0f 1f 00 nopl (%rax)
12: 90 nop
13: 90 nop
14: 90 nop
15: 90 nop
16: 90 nop
17: 90 nop
18: 90 nop
19: 90 nop
1a: 90 nop
1b: 90 nop
1c: 90 nop
1d: 90 nop
1e: 90 nop
1f: 90 nop
20: 90 nop
21: 90 nop
22: f3 0f 1e fa endbr64
26: 48 8b 04 24 mov (%rsp),%rax
* 2a: 65 48 8b 0c 25 40 d7 mov %gs:0x3d740,%rcx <-- trapping instruction
31: 03 00
33: 65 8b 15 c0 70 70 7e mov %gs:0x7e7070c0(%rip),%edx # 0x7e7070fa
3a: f7 c2 00 01 ff 00 test $0xff0100,%edx