Oops: general protection fault, probably for non-canonical address 0xdffffc0000000018: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x00000000000000c0-0x00000000000000c7]
CPU: 0 UID: 0 PID: 8712 Comm: syz.4.730 Not tainted 6.15.0-rc5-syzkaller-00022-g01f95500a162 #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/29/2025
RIP: 0010:__in6_dev_get include/net/addrconf.h:347 [inline]
RIP: 0010:ip6_ignore_linkdown include/net/addrconf.h:443 [inline]
RIP: 0010:find_match+0x136/0x15d0 net/ipv6/route.c:781
Code: 48 c1 ea 03 80 3c 02 00 0f 85 ac 11 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 7d 00 49 8d bf c0 00 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 93 11 00 00 4d 8b bf c0 00 00 00 e8 f4 13 50 01
RSP: 0018:ffffc90000006940 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 0000000000000002 RCX: ffffffff8a1cb20c
RDX: 0000000000000018 RSI: ffffffff8a1cb24f RDI: 00000000000000c0
RBP: ffffc90000006a48 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff888029709c37
R13: ffff888029709c20 R14: 1ffff92000000d37 R15: 0000000000000000
FS: 00007f28cfe0a6c0(0000) GS:ffff8881249df000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f28cfde9d58 CR3: 000000001f7f2000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
rt6_nh_find_match+0xfa/0x1a0 net/ipv6/route.c:821
nexthop_for_each_fib6_nh+0x165/0x4a0 net/ipv4/nexthop.c:1515
__find_rr_leaf+0x6e5/0xe00 net/ipv6/route.c:862
find_rr_leaf net/ipv6/route.c:890 [inline]
rt6_select net/ipv6/route.c:934 [inline]
fib6_table_lookup+0x57c/0xa30 net/ipv6/route.c:2230
ip6_pol_route+0x1cc/0x1230 net/ipv6/route.c:2266
pol_lookup_func include/net/ip6_fib.h:616 [inline]
fib6_rule_lookup+0x386/0x720 net/ipv6/fib6_rules.c:125
ip6_route_output_flags_noref net/ipv6/route.c:2674 [inline]
ip6_route_output_flags+0x1d0/0x640 net/ipv6/route.c:2686
ip6_route_output include/net/ip6_route.h:93 [inline]
ip6_dst_lookup_tail.constprop.0+0xa52/0x2140 net/ipv6/ip6_output.c:1128
ip6_dst_lookup_flow+0x99/0x1d0 net/ipv6/ip6_output.c:1259
udp_tunnel6_dst_lookup+0x2cd/0x4b0 net/ipv6/ip6_udp_tunnel.c:165
geneve6_xmit_skb drivers/net/geneve.c:957 [inline]
geneve_xmit+0x96e/0x5610 drivers/net/geneve.c:1043
__netdev_start_xmit include/linux/netdevice.h:5203 [inline]
netdev_start_xmit include/linux/netdevice.h:5212 [inline]
xmit_one net/core/dev.c:3776 [inline]
dev_hard_start_xmit+0x93/0x740 net/core/dev.c:3792
__dev_queue_xmit+0x7eb/0x43e0 net/core/dev.c:4629
dev_queue_xmit include/linux/netdevice.h:3350 [inline]
neigh_resolve_output net/core/neighbour.c:1512 [inline]
neigh_resolve_output+0x53a/0x940 net/core/neighbour.c:1492
neigh_output include/net/neighbour.h:539 [inline]
ip6_finish_output2+0xaeb/0x2020 net/ipv6/ip6_output.c:141
__ip6_finish_output net/ipv6/ip6_output.c:215 [inline]
ip6_finish_output+0x3f9/0x1360 net/ipv6/ip6_output.c:226
NF_HOOK_COND include/linux/netfilter.h:303 [inline]
ip6_output+0x1f9/0x540 net/ipv6/ip6_output.c:247
dst_output include/net/dst.h:459 [inline]
NF_HOOK include/linux/netfilter.h:314 [inline]
ndisc_send_skb+0xa91/0x1e40 net/ipv6/ndisc.c:513
ndisc_send_rs+0x129/0x670 net/ipv6/ndisc.c:723
addrconf_rs_timer+0x40d/0x840 net/ipv6/addrconf.c:4038
call_timer_fn+0x197/0x620 kernel/time/timer.c:1789
expire_timers kernel/time/timer.c:1840 [inline]
__run_timers+0x6ef/0x960 kernel/time/timer.c:2414
__run_timer_base kernel/time/timer.c:2426 [inline]
__run_timer_base kernel/time/timer.c:2418 [inline]
run_timer_base+0x114/0x190 kernel/time/timer.c:2435
run_timer_softirq+0x1a/0x40 kernel/time/timer.c:2445
handle_softirqs+0x216/0x8e0 kernel/softirq.c:579
__do_softirq kernel/softirq.c:613 [inline]
invoke_softirq kernel/softirq.c:453 [inline]
__irq_exit_rcu+0x109/0x170 kernel/softirq.c:680
irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x31/0x80 kernel/locking/spinlock.c:194
Code: f5 53 48 8b 74 24 10 48 89 fb 48 83 c7 18 e8 e6 9e 28 f6 48 89 df e8 8e f2 28 f6 f7 c5 00 02 00 00 75 23 9c 58 f6 c4 02 75 37 01 00 00 00 e8 e5 5e 19 f6 65 8b 05 1e a4 34 08 85 c0 74 16 5b
RSP: 0018:ffffc9000e4cf818 EFLAGS: 00000246
RAX: 0000000000000006 RBX: ffff88805ebcfa80 RCX: 0000000000000006
RDX: 0000000000000000 RSI: ffffffff8dbe124f RDI: ffffffff8bf482e0
RBP: 0000000000000282 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff90850517 R11: 0000000000000000 R12: 0000000000000002
R13: ffff88805ebcf8f0 R14: ffff88805ebcfac0 R15: ffff88805ebcf468
__unix_dgram_recvmsg+0x326/0xee0 net/unix/af_unix.c:2447
unix_dgram_recvmsg+0xd0/0x110 net/unix/af_unix.c:2522
sock_recvmsg_nosec net/socket.c:1017 [inline]
____sys_recvmsg+0x5f6/0x6b0 net/socket.c:2784
___sys_recvmsg+0x114/0x1a0 net/socket.c:2828
do_recvmmsg+0x2fe/0x740 net/socket.c:2923
__sys_recvmmsg net/socket.c:2997 [inline]
__do_sys_recvmmsg net/socket.c:3020 [inline]
__se_sys_recvmmsg net/socket.c:3013 [inline]
__x64_sys_recvmmsg+0x22a/0x280 net/socket.c:3013
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f28cef8e969
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:00007f28cfe0a038 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007f28cf1b6080 RCX: 00007f28cef8e969
RDX: 0000000000010106 RSI: 00002000000000c0 RDI: 0000000000000003
RBP: 00007f28cf010ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f28cf1b6080 R15: 00007ffeeccd7eb8
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__in6_dev_get include/net/addrconf.h:347 [inline]
RIP: 0010:ip6_ignore_linkdown include/net/addrconf.h:443 [inline]
RIP: 0010:find_match+0x136/0x15d0 net/ipv6/route.c:781
Code: 48 c1 ea 03 80 3c 02 00 0f 85 ac 11 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 7d 00 49 8d bf c0 00 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 93 11 00 00 4d 8b bf c0 00 00 00 e8 f4 13 50 01
RSP: 0018:ffffc90000006940 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 0000000000000002 RCX: ffffffff8a1cb20c
RDX: 0000000000000018 RSI: ffffffff8a1cb24f RDI: 00000000000000c0
RBP: ffffc90000006a48 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff888029709c37
R13: ffff888029709c20 R14: 1ffff92000000d37 R15: 0000000000000000
FS: 00007f28cfe0a6c0(0000) GS:ffff8881249df000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f28cfde9d58 CR3: 000000001f7f2000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 48 c1 ea 03 shr $0x3,%rdx
4: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1)
8: 0f 85 ac 11 00 00 jne 0x11ba
e: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
15: fc ff df
18: 4d 8b 7d 00 mov 0x0(%r13),%r15
1c: 49 8d bf c0 00 00 00 lea 0xc0(%r15),%rdi
23: 48 89 fa mov %rdi,%rdx
26: 48 c1 ea 03 shr $0x3,%rdx
* 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction
2e: 0f 85 93 11 00 00 jne 0x11c7
34: 4d 8b bf c0 00 00 00 mov 0xc0(%r15),%r15
3b: e8 f4 13 50 01 call 0x1501434