------------[ cut here ]------------
WARNING: CPU: 1 PID: 6593 at net/ipv4/route.c:1274 kfree_skb include/linux/skbuff.h:1220 [inline]
WARNING: CPU: 1 PID: 6593 at net/ipv4/route.c:1274 ip_rt_bug+0x25/0xf0 net/ipv4/route.c:1273
Modules linked in:
CPU: 1 PID: 6593 Comm: syz.8.584 Not tainted 6.1.138-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
RIP: 0010:ip_rt_bug+0x25/0xf0 net/ipv4/route.c:1274
Code: 41 ff ff ff 90 41 57 41 56 41 55 41 54 53 48 89 d3 e8 af 74 eb f8 66 90 e8 a8 74 eb f8 48 89 df be 01 00 00 00 e8 9b b1 7e 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: 00010292
RAX: ae51304b1f9a3300 RBX: ffff888024209280 RCX: ae51304b1f9a3300
RDX: dffffc0000000000 RSI: ffffffff8a6bfe00 RDI: ffffffff8abf0da0
RBP: ffff88806561f200 R08: dffffc0000000000 R09: fffffbfff211705b
R10: fffffbfff211705b R11: 1ffffffff211705a R12: ffff88806561f230
R13: ffff8880242092d8 R14: ffff888024209280 R15: ffff888145a81380
FS: 0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b33f10ff8 CR3: 000000005ca03000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000097 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
dst_output include/net/dst.h:453 [inline]
ip_local_out net/ipv4/ip_output.c:126 [inline]
ip_send_skb+0x129/0x1c0 net/ipv4/ip_output.c:1599
__icmp_send+0xfbb/0x1320 net/ipv4/icmp.c:785
ipv4_send_dest_unreach net/ipv4/route.c:1254 [inline]
ipv4_link_failure+0x65c/0xa10 net/ipv4/route.c:1261
dst_link_failure include/net/dst.h:423 [inline]
arp_error_report+0x10e/0x160 net/ipv4/arp.c:296
neigh_invalidate+0x22c/0x450 net/core/neighbour.c:1059
neigh_timer_handler+0x911/0x1080 net/core/neighbour.c:1146
call_timer_fn+0x1a0/0x670 kernel/time/timer.c:1504
expire_timers kernel/time/timer.c:1549 [inline]
__run_timers+0x525/0x7c0 kernel/time/timer.c:1820
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1833
handle_softirqs+0x2a1/0x920 kernel/softirq.c:578
__do_softirq kernel/softirq.c:612 [inline]
invoke_softirq kernel/softirq.c:452 [inline]
__irq_exit_rcu+0x12f/0x220 kernel/softirq.c:661
irq_exit_rcu+0x5/0x20 kernel/softirq.c:673
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:instrument_atomic_read include/linux/instrumented.h:72 [inline]
RIP: 0010:_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
RIP: 0010:folio_test_referenced include/linux/page-flags.h:476 [inline]
RIP: 0010:folio_inc_refs mm/swap.c:431 [inline]
RIP: 0010:folio_mark_accessed+0x168/0x1440 mm/swap.c:470
Code: 01 31 ff e8 9a 2d d1 ff 49 83 e7 01 0f 85 91 03 00 00 4c 89 24 24 0f 1f 44 00 00 e8 a2 29 d1 ff 49 bf 00 00 00 00 00 fc ff df <4c> 89 e7 be 08 00 00 00 e8 7b 9e 22 00 43 80 7c 3d 00 00 74 08 4c
RSP: 0018:ffffc90003687720 EFLAGS: 00000293
RAX: ffffffff81afaa0e RBX: 1ffffd40002f5f11 RCX: ffff88801d243b80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900036877d0 R08: dffffc0000000000 R09: fffff940002f5f11
R10: fffff940002f5f11 R11: 1ffffd40002f5f10 R12: ffffea00017af880
R13: 1ffffd40002f5f10 R14: ffffea00017af888 R15: dffffc0000000000
zap_pte_range mm/memory.c:1450 [inline]
zap_pmd_range mm/memory.c:1574 [inline]
zap_pud_range mm/memory.c:1603 [inline]
zap_p4d_range mm/memory.c:1624 [inline]
unmap_page_range+0x109a/0x2500 mm/memory.c:1645
unmap_vmas+0x22c/0x330 mm/memory.c:1730
exit_mmap+0x1cc/0x8e0 mm/mmap.c:3238
__mmput+0x118/0x3c0 kernel/fork.c:1200
exit_mm+0x1e6/0x2c0 kernel/exit.c:565
do_exit+0x8b9/0x2400 kernel/exit.c:858
do_group_exit+0x217/0x2d0 kernel/exit.c:1021
__do_sys_exit_group kernel/exit.c:1032 [inline]
__se_sys_exit_group kernel/exit.c:1030 [inline]
__x64_sys_exit_group+0x3b/0x40 kernel/exit.c:1030
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fe30f18e969
Code: Unable to access opcode bytes at 0x7fe30f18e93f.
RSP: 002b:00007ffc36f1e3d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fe30f18e969
RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffc36f1e43c R08: 0000000936f1e4cf R09: 00000000000927c0
R10: 000000000000ac2c R11: 0000000000000246 R12: 0000000000000034
R13: 00000000000927c0 R14: 0000000000031d4d R15: 00007ffc36f1e490
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 31 ff xor %edi,%edi
2: e8 9a 2d d1 ff call 0xffd12da1
7: 49 83 e7 01 and $0x1,%r15
b: 0f 85 91 03 00 00 jne 0x3a2
11: 4c 89 24 24 mov %r12,(%rsp)
15: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
1a: e8 a2 29 d1 ff call 0xffd129c1
1f: 49 bf 00 00 00 00 00 movabs $0xdffffc0000000000,%r15
26: fc ff df
* 29: 4c 89 e7 mov %r12,%rdi <-- trapping instruction
2c: be 08 00 00 00 mov $0x8,%esi
31: e8 7b 9e 22 00 call 0x229eb1
36: 43 80 7c 3d 00 00 cmpb $0x0,0x0(%r13,%r15,1)
3c: 74 08 je 0x46
3e: 4c rex.WR