------------[ cut here ]------------
WARNING: CPU: 1 PID: 4264 at net/ipv4/route.c:1253 kfree_skb include/linux/skbuff.h:1220 [inline]
WARNING: CPU: 1 PID: 4264 at net/ipv4/route.c:1253 ip_rt_bug+0x25/0xf0 net/ipv4/route.c:1252
Modules linked in:
CPU: 1 PID: 4264 Comm: syz-executor Not tainted 6.1.126-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:ip_rt_bug+0x25/0xf0 net/ipv4/route.c:1253
Code: ff ff 0f 1f 00 41 57 41 56 41 55 41 54 53 48 89 d3 e8 ef 96 60 f8 66 90 e8 e8 96 60 f8 48 89 df be 01 00 00 00 e8 cb 24 76 ff <0f> 0b 31 c0 5b 41 5c 41 5d 41 5e 41 5f c3 49 bd 00 00 00 00 00 fc
RSP: 0018:ffffc900001e0638 EFLAGS: 00010296
RAX: bbd1a7a97e086001 RBX: ffff88802f559000 RCX: ffffffff816b126a
RDX: dffffc0000000000 RSI: ffffffff8b0c0340 RDI: ffffffff8b5e67c0
RBP: dffffc0000000000 R08: dffffc0000000000 R09: fffffbfff2249c5f
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88802f559000
R13: ffff88802f559058 R14: ffff88807322b880 R15: ffff88801fa99380
FS: 000055558725a500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb4ff2a56c0 CR3: 000000005c470000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
dst_output include/net/dst.h:444 [inline]
ip_local_out net/ipv4/ip_output.c:126 [inline]
ip_send_skb+0x113/0x1a0 net/ipv4/ip_output.c:1599
__icmp_send+0xf9e/0x15a0 net/ipv4/icmp.c:780
ipv4_send_dest_unreach net/ipv4/route.c:1233 [inline]
ipv4_link_failure+0x638/0xa10 net/ipv4/route.c:1240
dst_link_failure include/net/dst.h:423 [inline]
arp_error_report+0x112/0x160 net/ipv4/arp.c:296
neigh_invalidate+0x240/0x460 net/core/neighbour.c:1059
neigh_timer_handler+0x8a1/0x1010 net/core/neighbour.c:1146
call_timer_fn+0x1ad/0x6b0 kernel/time/timer.c:1504
expire_timers kernel/time/timer.c:1549 [inline]
__run_timers+0x67c/0x890 kernel/time/timer.c:1820
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1833
handle_softirqs+0x2ee/0xa40 kernel/softirq.c:571
__do_softirq kernel/softirq.c:605 [inline]
invoke_softirq kernel/softirq.c:445 [inline]
__irq_exit_rcu+0x157/0x240 kernel/softirq.c:654
irq_exit_rcu+0x5/0x20 kernel/softirq.c:666
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:rcu_is_watching+0x63/0xb0 kernel/rcu/tree.c:722
Code: 89 f7 e8 30 a7 6e 00 48 c7 c3 a8 56 03 00 49 03 1e 48 89 d8 48 c1 e8 03 42 0f b6 04 38 84 c0 75 1e 8b 03 65 ff 0d 85 e7 8e 7e <74> 0c 83 e0 04 c1 e8 02 5b 41 5e 41 5f c3 e8 42 0b 8d ff eb ed 89
RSP: 0018:ffffc90003d27420 EFLAGS: 00000286
RAX: 000000000001fe44 RBX: ffff8880b8f356a8 RCX: ffff888026b95940
RDX: ffff888026b95940 RSI: ffffffff8b5e67a0 RDI: ffffffff8b5e6760
RBP: 0000000000000001 R08: ffffffff81ed0c57 R09: fffffbfff2249c4d
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 000000000004c7ae R14: ffffffff8cda6978 R15: dffffc0000000000
rcu_read_lock_sched include/linux/rcupdate.h:884 [inline]
pfn_valid+0x130/0x440 include/linux/mmzone.h:1857
page_table_check_set+0x25/0x6d0 mm/page_table_check.c:108
page_table_check_pte_set include/linux/page_table_check.h:83 [inline]
set_pte_at arch/x86/include/asm/pgtable.h:1009 [inline]
copy_present_pte mm/memory.c:1000 [inline]
copy_pte_range mm/memory.c:1091 [inline]
copy_pmd_range mm/memory.c:1177 [inline]
copy_pud_range mm/memory.c:1214 [inline]
copy_p4d_range mm/memory.c:1238 [inline]
copy_page_range+0x2d50/0x4660 mm/memory.c:1336
dup_mmap kernel/fork.c:697 [inline]
dup_mm kernel/fork.c:1541 [inline]
copy_mm+0xf42/0x1990 kernel/fork.c:1590
copy_process+0x19d5/0x4060 kernel/fork.c:2266
kernel_clone+0x222/0x920 kernel/fork.c:2681
__do_sys_clone kernel/fork.c:2822 [inline]
__se_sys_clone kernel/fork.c:2806 [inline]
__x64_sys_clone+0x231/0x280 kernel/fork.c:2806
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fb4fe57c593
Code: 1f 84 00 00 00 00 00 64 48 8b 04 25 10 00 00 00 45 31 c0 31 d2 31 f6 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 89 c2 85 c0 75 2c 64 48 8b 04 25 10 00 00
RSP: 002b:00007fff536a2be8 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fb4fe57c593
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001
R10: 000055558725a7d0 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000027114 R14: 00007fff536a2d70 R15: 000000000000007c
----------------
Code disassembly (best guess):
0: 89 f7 mov %esi,%edi
2: e8 30 a7 6e 00 call 0x6ea737
7: 48 c7 c3 a8 56 03 00 mov $0x356a8,%rbx
e: 49 03 1e add (%r14),%rbx
11: 48 89 d8 mov %rbx,%rax
14: 48 c1 e8 03 shr $0x3,%rax
18: 42 0f b6 04 38 movzbl (%rax,%r15,1),%eax
1d: 84 c0 test %al,%al
1f: 75 1e jne 0x3f
21: 8b 03 mov (%rbx),%eax
23: 65 ff 0d 85 e7 8e 7e decl %gs:0x7e8ee785(%rip) # 0x7e8ee7af
* 2a: 74 0c je 0x38 <-- trapping instruction
2c: 83 e0 04 and $0x4,%eax
2f: c1 e8 02 shr $0x2,%eax
32: 5b pop %rbx
33: 41 5e pop %r14
35: 41 5f pop %r15
37: c3 ret
38: e8 42 0b 8d ff call 0xff8d0b7f
3d: eb ed jmp 0x2c
3f: 89 .byte 0x89