Hello, syzbot found the following issue on: HEAD commit: 15cec633fc7b net: fec: tx processing does not call XDP API.. git tree: net console output: https://syzkaller.appspot.com/x/log.txt?x=17fbd745a80000 kernel config: https://syzkaller.appspot.com/x/.config?x=77b9a3cf8f44c6da dashboard link: https://syzkaller.appspot.com/bug?extid=ff6e85a2812073da0a36 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/cfb97ef3ebf9/disk-15cec633.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/2e8df2be69d2/vmlinux-15cec633.xz kernel image: https://storage.googleapis.com/syzbot-assets/2bdf17720191/bzImage-15cec633.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+ff6e85a2812073da0a36@xxxxxxxxxxxxxxxxxxxxxxxxx ------------[ cut here ]------------ WARNING: CPU: 1 PID: 12 at net/netfilter/nf_conntrack_core.c:1198 __nf_conntrack_confirm+0x867/0x12c0 net/netfilter/nf_conntrack_core.c:1198 Modules linked in: CPU: 1 PID: 12 Comm: kworker/u4:1 Not tainted 6.5.0-rc2-syzkaller-00231-g15cec633fc7b #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023 Workqueue: events_unbound macvlan_process_broadcast RIP: 0010:__nf_conntrack_confirm+0x867/0x12c0 net/netfilter/nf_conntrack_core.c:1198 Code: df e8 5d 64 ff ff 31 ff 41 89 c4 89 c6 e8 91 b5 1c f9 45 84 e4 0f 84 7a ff ff ff 44 8b 7c 24 18 e9 3b fe ff ff e8 49 ba 1c f9 <0f> 0b 48 8b 7c 24 20 e8 bd f6 cb 01 44 8b 74 24 44 8b 5c 24 38 44 RSP: 0018:ffffc900001e08b0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff888077a75bc0 RCX: 0000000000000100 RDX: ffff888015265940 RSI: ffffffff8869b667 RDI: 0000000000000001 RBP: 000000000001e698 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000004f10 R12: ffff888077a75b00 R13: 0000000000000001 R14: 000000000001e698 R15: 00000000000038d1 FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fea3059d988 CR3: 000000004f78b000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <IRQ> nf_conntrack_confirm include/net/netfilter/nf_conntrack_core.h:62 [inline] nf_confirm+0xfae/0x1200 net/netfilter/nf_conntrack_proto.c:155 nf_hook_entry_hookfn include/linux/netfilter.h:143 [inline] nf_hook_slow+0xbf/0x1e0 net/netfilter/core.c:626 nf_hook include/linux/netfilter.h:258 [inline] NF_HOOK include/linux/netfilter.h:301 [inline] ip_local_deliver+0x2f1/0x540 net/ipv4/ip_input.c:254 dst_input include/net/dst.h:468 [inline] ip_rcv_finish+0x1c4/0x2e0 net/ipv4/ip_input.c:449 NF_HOOK include/linux/netfilter.h:303 [inline] NF_HOOK include/linux/netfilter.h:297 [inline] ip_rcv+0xc8/0x410 net/ipv4/ip_input.c:569 __netif_receive_skb_one_core+0x115/0x180 net/core/dev.c:5452 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5566 process_backlog+0x101/0x6c0 net/core/dev.c:5894 __napi_poll.constprop.0+0xb4/0x530 net/core/dev.c:6460 napi_poll net/core/dev.c:6527 [inline] net_rx_action+0x956/0xe90 net/core/dev.c:6660 __do_softirq+0x218/0x965 kernel/softirq.c:553 do_softirq kernel/softirq.c:454 [inline] do_softirq+0xaa/0xe0 kernel/softirq.c:441 </IRQ> <TASK> __local_bh_enable_ip+0xf8/0x120 kernel/softirq.c:381 local_bh_enable include/linux/bottom_half.h:33 [inline] netif_rx net/core/dev.c:4972 [inline] netif_rx+0x332/0x420 net/core/dev.c:4961 macvlan_broadcast+0x37d/0x680 drivers/net/macvlan.c:290 macvlan_multicast_rx drivers/net/macvlan.c:302 [inline] macvlan_multicast_rx+0xd6/0x100 drivers/net/macvlan.c:296 macvlan_process_broadcast+0x225/0x690 drivers/net/macvlan.c:338 process_one_work+0xaa2/0x16f0 kernel/workqueue.c:2597 worker_thread+0x687/0x1110 kernel/workqueue.c:2748 kthread+0x33a/0x430 kernel/kthread.c:389 ret_from_fork+0x2c/0x70 arch/x86/kernel/process.c:145 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:296 RIP: 0000:0x0 Code: Unable to access opcode bytes at 0xffffffffffffffd6. RSP: 0000:0000000000000000 EFLAGS: 00000000 ORIG_RAX: 0000000000000000 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 </TASK> --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. 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