syzbot

bridge0: received packet on syz_tun with own address as source address (addr:aa:aa:aa:aa:aa:aa, vlan:0)
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WARNING: CPU: 1 PID: 8848 at net/bridge/br_netfilter_hooks.c:634 br_nf_local_in+0x479/0x4c0 net/bridge/br_netfilter_hooks.c:634
Modules linked in:
CPU: 1 PID: 8848 Comm: syz.2.647 Not tainted 5.15.185-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:br_nf_local_in+0x479/0x4c0 net/bridge/br_netfilter_hooks.c:634
Code: e9 50 fc ff ff e8 d7 07 c7 f8 0f 0b 4c 89 f7 e8 5d 2b 00 00 e9 17 fd ff ff e8 c3 07 c7 f8 0f 0b e9 d8 fd ff ff e8 b7 07 c7 f8 <0f> 0b e9 3f ff ff ff 44 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c 55 fd
RSP: 0018:ffffc90002e1eea8 EFLAGS: 00010293
RAX: ffffffff88b0ba69 RBX: 0000000000000000 RCX: ffff88802a3c3b80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffffff8b0369e8 R08: dffffc0000000000 R09: ffffed100bf6d1c9
R10: ffffed100bf6d1c9 R11: 1ffff1100bf6d1c8 R12: ffff88805fb68e40
R13: ffff88805a61ce28 R14: 0000000000000000 R15: 0000000000000000
FS:  00007fc120f0b6c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc120f0af98 CR3: 0000000065dcf000 CR4: 00000000003526e0
Call Trace:
 <TASK>
 nf_hook_entry_hookfn include/linux/netfilter.h:142 [inline]
 nf_hook_slow+0xb9/0x200 net/netfilter/core.c:584
 nf_hook include/linux/netfilter.h:257 [inline]
 NF_HOOK+0x21d/0x340 include/linux/netfilter.h:300
 br_handle_frame_finish+0x1035/0x12c0 net/bridge/br_input.c:186
 br_nf_hook_thresh+0x3b2/0x480 net/bridge/br_netfilter_hooks.c:1158
 br_nf_pre_routing_finish_ipv6+0x903/0xc80 net/bridge/br_netfilter_ipv6.c:-1
 NF_HOOK include/linux/netfilter.h:302 [inline]
 br_nf_pre_routing_ipv6+0x359/0x650 net/bridge/br_netfilter_ipv6.c:237
 nf_hook_entry_hookfn include/linux/netfilter.h:142 [inline]
 nf_hook_bridge_pre net/bridge/br_input.c:242 [inline]
 br_handle_frame+0x89b/0x1180 net/bridge/br_input.c:384
 __netif_receive_skb_core+0xfb0/0x35d0 net/core/dev.c:5419
 __netif_receive_skb_one_core net/core/dev.c:5523 [inline]
 __netif_receive_skb+0x74/0x290 net/core/dev.c:5639
 netif_receive_skb_internal net/core/dev.c:5725 [inline]
 netif_receive_skb+0x19e/0x6c0 net/core/dev.c:5784
 tun_rx_batched+0x5a1/0x6d0 drivers/net/tun.c:-1
 tun_get_user+0x23f0/0x38d0 drivers/net/tun.c:1989
 tun_chr_write_iter+0x112/0x1e0 drivers/net/tun.c:2019
 call_write_iter include/linux/fs.h:2172 [inline]
 new_sync_write fs/read_write.c:507 [inline]
 vfs_write+0x712/0xd00 fs/read_write.c:594
 ksys_write+0x14d/0x250 fs/read_write.c:647
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fc1230a23df
Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 f9 92 02 00 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 4c 93 02 00 48
RSP: 002b:00007fc120f0b000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fc1232cafa0 RCX: 00007fc1230a23df
RDX: 000000000000004a RSI: 00002000000004c0 RDI: 00000000000000c8
RBP: 00007fc123125b39 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000004a R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fc1232cafa0 R15: 00007fff095fa2f8
 </TASK>