------------[ cut here ]------------
WARNING: net/ipv4/route.c:1275 at ip_rt_bug+0x2d/0x150 net/ipv4/route.c:1275, CPU#0: syz.4.4642/24381
Modules linked in:
CPU: 0 UID: 0 PID: 24381 Comm: syz.4.4642 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:ip_rt_bug+0x2d/0x150 net/ipv4/route.c:1275
Code: fa 55 41 57 41 56 41 55 41 54 53 48 89 d3 e8 9a f5 fd f7 66 90 e8 93 f5 fd f7 31 ff 48 89 de ba 02 00 00 00 e8 14 e9 6d ff 90 <0f> 0b 90 31 c0 5b 41 5c 41 5d 41 5e 41 5f 5d e9 bf de 9a 01 cc f3
RSP: 0018:ffffc90000007618 EFLAGS: 00010292
RAX: 2ccee81fa6ddbd00 RBX: ffff8880538d18c0 RCX: 2ccee81fa6ddbd00
RDX: 0000000000000002 RSI: ffffffff8d7922ac RDI: ffffffff8bc08360
RBP: 0000000000000001 R08: ffffffff8f821f77 R09: 1ffffffff1f043ee
R10: dffffc0000000000 R11: fffffbfff1f043ef R12: dffffc0000000000
R13: dffffc0000000000 R14: ffff8880538d18c0 R15: ffff888020eb9e00
FS: 00007f27e217a6c0(0000) GS:ffff888125e35000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c31e362 CR3: 0000000031316000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
ip_local_out net/ipv4/ip_output.c:131 [inline]
ip_send_skb net/ipv4/ip_output.c:1508 [inline]
ip_push_pending_frames+0xbe/0x150 net/ipv4/ip_output.c:1528
__icmp_send+0x101e/0x13c0 net/ipv4/icmp.c:972
ipv4_send_dest_unreach net/ipv4/route.c:1255 [inline]
ipv4_link_failure+0x65e/0xa50 net/ipv4/route.c:1262
dst_link_failure include/net/dst.h:432 [inline]
arp_error_report+0x118/0x160 net/ipv4/arp.c:296
neigh_invalidate+0x235/0x460 net/core/neighbour.c:1081
neigh_timer_handler+0x949/0x1130 net/core/neighbour.c:1172
call_timer_fn+0x16e/0x590 kernel/time/timer.c:1748
expire_timers kernel/time/timer.c:1799 [inline]
__run_timers kernel/time/timer.c:2373 [inline]
__run_timer_base+0x61a/0x860 kernel/time/timer.c:2385
run_timer_base kernel/time/timer.c:2394 [inline]
run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2404
handle_softirqs+0x27d/0x850 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723
irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1056
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:lock_acquire+0x16c/0x340 kernel/locking/lockdep.c:5872
Code: 00 00 00 00 9c 8f 44 24 30 f7 44 24 30 00 02 00 00 0f 85 cd 00 00 00 f7 44 24 08 00 02 00 00 74 01 fb 65 48 8b 05 d4 38 e0 10 <48> 3b 44 24 58 0f 85 e5 00 00 00 48 83 c4 60 5b 41 5c 41 5d 41 5e
RSP: 0018:ffffc90003ebf760 EFLAGS: 00000206
RAX: 2ccee81fa6ddbd00 RBX: 0000000000000000 RCX: 2ccee81fa6ddbd00
RDX: 000000005a44979c RSI: ffffffff8d978ff2 RDI: ffffffff8bc08360
RBP: ffffffff81ac186d R08: ffffffff81ac186d R09: ffffffff8df41a20
R10: ffffc90003ebf8d8 R11: ffffffff81ada120 R12: 0000000000000002
R13: ffffffff8df41a20 R14: 0000000000000000 R15: 0000000000000246
rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
rcu_read_lock include/linux/rcupdate.h:867 [inline]
class_rcu_constructor include/linux/rcupdate.h:1195 [inline]
is_module_text_address+0x39/0x1e0 kernel/module/main.c:3856
kernel_text_address+0x94/0xe0 kernel/extable.c:119
__kernel_text_address+0xd/0x40 kernel/extable.c:79
unwind_get_return_address+0x4d/0x90 arch/x86/kernel/unwind_orc.c:385
arch_stack_walk+0xfc/0x150 arch/x86/kernel/stacktrace.c:26
stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:56 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:77
poison_kmalloc_redzone mm/kasan/common.c:397 [inline]
__kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:414
kasan_kmalloc include/linux/kasan.h:262 [inline]
__do_kmalloc_node mm/slub.c:5657 [inline]
__kmalloc_noprof+0x41d/0x800 mm/slub.c:5669
kmalloc_noprof include/linux/slab.h:961 [inline]
kzalloc_noprof include/linux/slab.h:1094 [inline]
lsm_blob_alloc security/security.c:192 [inline]
lsm_sock_alloc security/security.c:4375 [inline]
security_sk_alloc+0x52/0x390 security/security.c:4391
sk_prot_alloc+0x101/0x220 net/core/sock.c:2248
sk_alloc+0x3a/0x390 net/core/sock.c:2301
__netlink_create+0x65/0x260 net/netlink/af_netlink.c:626
netlink_create+0x3ca/0x590 net/netlink/af_netlink.c:684
__sock_create+0x4b3/0x9d0 net/socket.c:1605
sock_create net/socket.c:1663 [inline]
__sys_socket_create net/socket.c:1700 [inline]
__sys_socket+0xd7/0x1b0 net/socket.c:1747
__do_sys_socket net/socket.c:1761 [inline]
__se_sys_socket net/socket.c:1759 [inline]
__x64_sys_socket+0x7a/0x90 net/socket.c:1759
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f27e138f749
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:00007f27e217a038 EFLAGS: 00000246 ORIG_RAX: 0000000000000029
RAX: ffffffffffffffda RBX: 00007f27e15e5fa0 RCX: 00007f27e138f749
RDX: 0000000000000004 RSI: 0000000000000003 RDI: 0000000000000010
RBP: 00007f27e1413f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f27e15e6038 R14: 00007f27e15e5fa0 R15: 00007ffeb0087558
----------------
Code disassembly (best guess):
0: 00 00 add %al,(%rax)
2: 00 00 add %al,(%rax)
4: 9c pushf
5: 8f 44 24 30 pop 0x30(%rsp)
9: f7 44 24 30 00 02 00 testl $0x200,0x30(%rsp)
10: 00
11: 0f 85 cd 00 00 00 jne 0xe4
17: f7 44 24 08 00 02 00 testl $0x200,0x8(%rsp)
1e: 00
1f: 74 01 je 0x22
21: fb sti
22: 65 48 8b 05 d4 38 e0 mov %gs:0x10e038d4(%rip),%rax # 0x10e038fe
29: 10
* 2a: 48 3b 44 24 58 cmp 0x58(%rsp),%rax <-- trapping instruction
2f: 0f 85 e5 00 00 00 jne 0x11a
35: 48 83 c4 60 add $0x60,%rsp
39: 5b pop %rbx
3a: 41 5c pop %r12
3c: 41 5d pop %r13
3e: 41 5e pop %r14