------------[ cut here ]------------
WARNING: CPU: 1 PID: 6827 at net/ipv4/route.c:1241 ip_rt_bug+0x2c/0x110 net/ipv4/route.c:1241
Modules linked in:
CPU: 1 UID: 0 PID: 6827 Comm: syz.0.387 Not tainted 6.12.0-syzkaller-00971-g158f238aa69d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
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 4b 3a 7a f7 66 90 e8 44 3a 7a f7 31 ff 48 89 de ba 02 00 00 00 e8 65 b4 6a 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:ffffc90000a18680 EFLAGS: 00010286
RAX: 1554fab55d469600 RBX: ffff8880270178c0 RCX: ffffffff8170d17a
RDX: dffffc0000000000 RSI: ffffffff8c0acc00 RDI: ffffffff8c604a60
RBP: 0000000000000001 R08: ffffffff942a88af R09: ffffffff8a1ab74b
R10: dffffc0000000000 R11: fffffbfff2855116 R12: dffffc0000000000
R13: ffffc90000a188f8 R14: ffff88807b0b3b00 R15: ffff88801bb821c0
FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055559301c5c8 CR3: 000000000e736000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
ip_local_out net/ipv4/ip_output.c:130 [inline]
ip_send_skb net/ipv4/ip_output.c:1496 [inline]
ip_push_pending_frames+0xbf/0x150 net/ipv4/ip_output.c:1516
__icmp_send+0x1017/0x15c0 net/ipv4/icmp.c:780
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+0x8a5/0xfe0 net/core/neighbour.c:1148
call_timer_fn+0x18e/0x650 kernel/time/timer.c:1794
expire_timers kernel/time/timer.c:1845 [inline]
__run_timers kernel/time/timer.c:2419 [inline]
__run_timer_base+0x66a/0x8e0 kernel/time/timer.c:2430
run_timer_base kernel/time/timer.c:2439 [inline]
run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2449
handle_softirqs+0x2c5/0x980 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:1049 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_release+0x658/0xa30 kernel/locking/lockdep.c:5850
Code: 3c 3b 00 74 08 4c 89 f7 e8 75 31 8b 00 f6 84 24 91 00 00 00 02 75 77 41 f7 c5 00 02 00 00 74 01 fb 48 c7 44 24 60 0e 36 e0 45 <4b> c7 04 27 00 00 00 00 4b c7 44 27 08 00 00 00 00 65 48 8b 04 25
RSP: 0018:ffffc90003def140 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff920007bde3a RCX: ffffc90003def103
RDX: 0000000000000003 RSI: ffffffff8c0add80 RDI: ffffffff8c604a60
RBP: ffffc90003def278 R08: ffffffff901c52af R09: 1ffffffff2038a55
R10: dffffc0000000000 R11: fffffbfff2038a56 R12: 1ffff920007bde34
R13: 0000000000000246 R14: ffffc90003def1d0 R15: dffffc0000000000
rcu_lock_release include/linux/rcupdate.h:347 [inline]
rcu_read_unlock_sched include/linux/rcupdate.h:962 [inline]
pfn_valid+0x3eb/0x450 include/linux/mmzone.h:2053
page_table_check_clear+0x1e/0x550 mm/page_table_check.c:70
get_and_clear_full_ptes include/linux/pgtable.h:684 [inline]
zap_present_folio_ptes mm/memory.c:1496 [inline]
zap_present_ptes mm/memory.c:1579 [inline]
zap_pte_range mm/memory.c:1621 [inline]
zap_pmd_range mm/memory.c:1739 [inline]
zap_pud_range mm/memory.c:1768 [inline]
zap_p4d_range mm/memory.c:1789 [inline]
unmap_page_range+0x2a13/0x40e0 mm/memory.c:1810
unmap_vmas+0x3cc/0x5f0 mm/memory.c:1900
exit_mmap+0x275/0xc40 mm/mmap.c:1923
__mmput+0x115/0x380 kernel/fork.c:1348
exit_mm+0x220/0x310 kernel/exit.c:570
do_exit+0x9b2/0x28e0 kernel/exit.c:925
do_group_exit+0x207/0x2c0 kernel/exit.c:1087
get_signal+0x16a3/0x1740 kernel/signal.c:2918
arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0xc9/0x370 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f36e2f7e759
Code: Unable to access opcode bytes at 0x7f36e2f7e72f.
RSP: 002b:00007f36e3cbd038 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: 0000000000010106 RBX: 00007f36e3136058 RCX: 00007f36e2f7e759
RDX: 0000000000010106 RSI: 00000000200000c0 RDI: 0000000000000003
RBP: 00007f36e2ff175e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f36e3136058 R15: 00007ffd8b5bdbe8
----------------
Code disassembly (best guess):
0: 3c 3b cmp $0x3b,%al
2: 00 74 08 4c add %dh,0x4c(%rax,%rcx,1)
6: 89 f7 mov %esi,%edi
8: e8 75 31 8b 00 call 0x8b3182
d: f6 84 24 91 00 00 00 testb $0x2,0x91(%rsp)
14: 02
15: 75 77 jne 0x8e
17: 41 f7 c5 00 02 00 00 test $0x200,%r13d
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 04 27 00 00 00 movq $0x0,(%r15,%r12,1) <-- trapping instruction
31: 00
32: 4b c7 44 27 08 00 00 movq $0x0,0x8(%r15,%r12,1)
39: 00 00
3b: 65 gs
3c: 48 rex.W
3d: 8b .byte 0x8b
3e: 04 25 add $0x25,%al