------------[ cut here ]------------
WARNING: ./include/linux/skbuff.h:1165 at skb_dst_check_unset include/linux/skbuff.h:1164 [inline], CPU#0: syz.1.2459/18164
WARNING: ./include/linux/skbuff.h:1165 at skb_dst_set include/linux/skbuff.h:1211 [inline], CPU#0: syz.1.2459/18164
WARNING: ./include/linux/skbuff.h:1165 at nf_reject_fill_skb_dst+0x2a4/0x330 net/ipv4/netfilter/nf_reject_ipv4.c:234, CPU#0: syz.1.2459/18164
Modules linked in:
CPU: 0 UID: 0 PID: 18164 Comm: syz.1.2459 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:ffffc90000007260 EFLAGS: 00010246
RAX: ffffffff8a19d773 RBX: ffff88805f39fc70 RCX: ffff88801cba3c00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000007390 R08: ffff888031f99f43 R09: 1ffff110063f33e8
R10: dffffc0000000000 R11: ffffed10063f33e9 R12: ffff88807f1dc101
R13: dffffc0000000001 R14: 1ffff92000000e50 R15: 0000000000000000
FS: 00007f4619e7b6c0(0000) GS:ffff8881259ff000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4619e7af98 CR3: 0000000047a7a000 CR4: 00000000003526f0
Call Trace:
nf_send_reset+0x10b/0x1480 net/ipv4/netfilter/nf_reject_ipv4.c:251
nft_reject_inet_eval+0x3b2/0x690 net/netfilter/nft_reject_inet.c:31
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:its_return_thunk+0x0/0x10 arch/x86/lib/retpoline.S:412
Code: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 e9 eb f8 b1 f5 cc
RSP: 0018:ffffc90011d67ad8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 1ffff920023acf64 RCX: 0000000000000002
RDX: 0000000000000000 RSI: 0000000000000ba1 RDI: ffffffff8cb33660
RBP: ffffc90011d67bf8 R08: ffffc90011d67667 R09: 1ffff920023acecc
R10: dffffc0000000000 R11: fffff520023acecd R12: dffffc0000000000
R13: dffffc0000000000 R14: ffffffff8cb33660 R15: 0000000000000000
__might_resched+0x91/0x610 kernel/sched/core.c:8919
__might_fault+0x77/0x130 mm/memory.c:7084
do_recvmmsg+0x330/0x770 net/socket.c:2977
__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: 0033:0x7f4618f8ebe9
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:00007f4619e7b038 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007f46191b6180 RCX: 00007f4618f8ebe9
RDX: 0000000000010106 RSI: 00002000000000c0 RDI: 0000000000000003
RBP: 00007f4619011e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f46191b6218 R14: 00007f46191b6180 R15: 00007fff55ad31d8
----------------
Code disassembly (best guess):
0: cc int3
1: cc int3
2: cc int3
3: cc int3
4: cc int3
5: cc int3
6: cc int3
7: cc int3
8: cc int3
9: cc int3
a: cc int3
b: cc int3
c: cc int3
d: cc int3
e: cc int3
f: cc int3
10: cc int3
11: cc int3
12: cc int3
13: cc int3
14: cc int3
15: cc int3
16: cc int3
17: cc int3
18: cc int3
19: cc int3
1a: cc int3
1b: cc int3
1c: cc int3
1d: cc int3
1e: cc int3
1f: cc int3
20: cc int3
21: cc int3
22: cc int3
23: cc int3
24: cc int3
25: cc int3
26: cc int3
27: cc int3
28: cc int3
29: cc int3
* 2a: c3 ret <-- trapping instruction
2b: cc int3
2c: 90 nop
2d: 90 nop
2e: 90 nop
2f: 90 nop
30: 90 nop
31: 90 nop
32: 90 nop
33: 90 nop
34: 90 nop
35: 90 nop
36: 90 nop
37: 90 nop
38: 90 nop
39: 90 nop
3a: e9 eb f8 b1 f5 jmp 0xf5b1f92a
3f: cc int3