------------[ cut here ]------------
WARNING: ./include/linux/skbuff.h:1165 at skb_dst_check_unset include/linux/skbuff.h:1164 [inline], CPU#1: syz.8.5130/26470
WARNING: ./include/linux/skbuff.h:1165 at skb_dst_set include/linux/skbuff.h:1211 [inline], CPU#1: syz.8.5130/26470
WARNING: ./include/linux/skbuff.h:1165 at nf_reject_fill_skb_dst+0x2a4/0x330 net/ipv4/netfilter/nf_reject_ipv4.c:234, CPU#1: syz.8.5130/26470
Modules linked in:
CPU: 1 UID: 0 PID: 26470 Comm: syz.8.5130 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:skb_dst_check_unset include/linux/skbuff.h:1164 [inline]
RIP: 0010:skb_dst_set include/linux/skbuff.h:1211 [inline]
RIP: 0010:nf_reject_fill_skb_dst+0x2a4/0x330 net/ipv4/netfilter/nf_reject_ipv4.c:234
Code: 8b 0d d0 38 a8 08 48 3b 8c 24 e0 00 00 00 75 5d 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc e8 5d b7 a6 f7 90 <0f> 0b 90 e9 38 ff ff ff 44 89 f9 80 e1 07 fe c1 38 c1 0f 8c 2b fe
RSP: 0018:ffffc90000a082c0 EFLAGS: 00010246
RAX: ffffffff8a19d773 RBX: ffff888036988780 RCX: ffff88805bc08000
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000a083f0 R08: ffffffff8fc40337 R09: 1ffffffff1f88066
R10: dffffc0000000000 R11: fffffbfff1f88067 R12: ffff8880345d4101
R13: dffffc0000000001 R14: 1ffff9200014105c R15: 0000000000000000
FS: 00007f3a4e7f16c0(0000) GS:ffff888125aff000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000071030 CR3: 000000003edfc000 CR4: 00000000003526f0
Call Trace:
nf_send_unreach+0x17b/0x6e0 net/ipv4/netfilter/nf_reject_ipv4.c:325
nft_reject_inet_eval+0x4bc/0x690 net/netfilter/nft_reject_inet.c:27
expr_call_ops_eval net/netfilter/nf_tables_core.c:237 [inline]
nft_do_chain+0x40c/0x1920 net/netfilter/nf_tables_core.c:285
nft_do_chain_inet+0x25d/0x340 net/netfilter/nft_chain_filter.c:161
nf_hook_entry_hookfn include/linux/netfilter.h:158 [inline]
nf_hook_slow+0xc5/0x220 net/netfilter/core.c:623
nf_hook include/linux/netfilter.h:273 [inline]
NF_HOOK+0x206/0x3a0 include/linux/netfilter.h:316
__netif_receive_skb_one_core net/core/dev.c:5991 [inline]
__netif_receive_skb+0x143/0x380 net/core/dev.c:6104
process_backlog+0x60e/0x14f0 net/core/dev.c:6456
__napi_poll+0xc4/0x360 net/core/dev.c:7506
napi_poll net/core/dev.c:7569 [inline]
net_rx_action+0x707/0xe30 net/core/dev.c:7696
handle_softirqs+0x283/0x870 kernel/softirq.c:579
__do_softirq kernel/softirq.c:613 [inline]
invoke_softirq kernel/softirq.c:453 [inline]
__irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680
irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1050
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xa8/0x110 kernel/locking/spinlock.c:194
Code: 74 05 e8 3b 01 47 f6 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f6 44 24 21 02 75 4f f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 b3 ad 0f f6 65 8b 05 bc d7 40 07 85 c0 74 40 48 c7 04 24 0e 36
RSP: 0018:ffffc9000ec4f5e0 EFLAGS: 00000206
RAX: 3e47c149c1c0b900 RBX: 0000000000000a02 RCX: 3e47c149c1c0b900
RDX: 0000000000000000 RSI: ffffffff8c035860 RDI: 0000000000000001
RBP: ffffc9000ec4f670 R08: ffffffff8fc40337 R09: 1ffffffff1f88066
R10: dffffc0000000000 R11: fffffbfff1f88067 R12: dffffc0000000000
R13: ffff8880378df5c0 R14: ffff8880378df580 R15: 1ffff92001d89ebc
spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
__wake_up_common_lock+0x190/0x1f0 kernel/sched/wait.c:127
__unix_dgram_recvmsg+0x486/0xd60 net/unix/af_unix.c:2626
sock_recvmsg_nosec+0x183/0x1c0 net/socket.c:1065
____sys_recvmsg+0x3aa/0x460 net/socket.c:2832
___sys_recvmsg+0x1b5/0x510 net/socket.c:2876
do_recvmmsg+0x307/0x770 net/socket.c:2971
__sys_recvmmsg net/socket.c:3045 [inline]
__do_sys_recvmmsg net/socket.c:3068 [inline]
__se_sys_recvmmsg net/socket.c:3061 [inline]
__x64_sys_recvmmsg+0x190/0x240 net/socket.c:3061
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3a4d98ebe9
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:00007f3a4e7f1038 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007f3a4dbb6090 RCX: 00007f3a4d98ebe9
RDX: 0000000000010106 RSI: 00002000000000c0 RDI: 0000000000000005
RBP: 00007f3a4da11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3a4dbb6128 R14: 00007f3a4dbb6090 R15: 00007ffc40f5a428
----------------
Code disassembly (best guess):
0: 74 05 je 0x7
2: e8 3b 01 47 f6 call 0xf6470142
7: 48 c7 44 24 20 00 00 movq $0x0,0x20(%rsp)
e: 00 00
10: 9c pushf
11: 8f 44 24 20 pop 0x20(%rsp)
15: f6 44 24 21 02 testb $0x2,0x21(%rsp)
1a: 75 4f jne 0x6b
1c: f7 c3 00 02 00 00 test $0x200,%ebx
22: 74 01 je 0x25
24: fb sti
25: bf 01 00 00 00 mov $0x1,%edi
* 2a: e8 b3 ad 0f f6 call 0xf60fade2 <-- trapping instruction
2f: 65 8b 05 bc d7 40 07 mov %gs:0x740d7bc(%rip),%eax # 0x740d7f2
36: 85 c0 test %eax,%eax
38: 74 40 je 0x7a
3a: 48 rex.W
3b: c7 .byte 0xc7
3c: 04 24 add $0x24,%al
3e: 0e (bad)
3f: 36 ss