net/hsr/hsr_forward.c:366: Malformed frame (port_src hsr0) ------------[ cut here ]------------ WARNING: CPU: 0 PID: 9757 at net/hsr/hsr_forward.c:365 hsr_forward_skb.cold+0xa7/0xef net/hsr/hsr_forward.c:365 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 9757 Comm: syz-executor.0 Not tainted 4.14.290-syzkaller #0 batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3d) already exists on: batadv_slave_0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 panic+0x1f9/0x42d kernel/panic.c:183 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! __warn.cold+0x20/0x44 kernel/panic.c:547 report_bug+0x208/0x250 lib/bug.c:183 fixup_bug arch/x86/kernel/traps.c:177 [inline] fixup_bug arch/x86/kernel/traps.c:172 [inline] do_error_trap+0x195/0x2d0 arch/x86/kernel/traps.c:295 batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3d) already exists on: batadv_slave_0 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:964 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! RIP: 0010:hsr_forward_skb.cold+0xa7/0xef net/hsr/hsr_forward.c:365 RSP: 0018:ffff8880a2b37890 EFLAGS: 00010282 RAX: 000000000000003a RBX: 0000000000000000 RCX: 0000000000000000 RDX: 000000000000ee64 RSI: ffffffff814430d0 RDI: ffffed1014566f08 RBP: ffff88809acc2b80 R08: 000000000000003a R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880b47f4bc0 R13: ffff888093fbb400 R14: ffff888093fbb410 R15: ffff88809acc2c50 hsr_dev_xmit+0x6b/0xa0 net/hsr/hsr_device.c:242 batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3d) already exists on: batadv_slave_0 __netdev_start_xmit include/linux/netdevice.h:4054 [inline] netdev_start_xmit include/linux/netdevice.h:4063 [inline] packet_direct_xmit+0x410/0x610 net/packet/af_packet.c:269 packet_snd+0x13aa/0x26f0 net/packet/af_packet.c:3032 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! packet_sendmsg+0x12ed/0x33a0 net/packet/af_packet.c:3061 batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3d) already exists on: batadv_slave_0 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xb5/0x100 net/socket.c:656 SYSC_sendto net/socket.c:1763 [inline] SyS_sendto+0x1c7/0x2c0 net/socket.c:1731 batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3d) already exists on: batadv_slave_0 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7f86fe8d5279 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! RSP: 002b:00007f86fd24a168 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f86fe9e7f80 RCX: 00007f86fe8d5279 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00007f86fe92f189 R08: 00000000200000c0 R09: 0000000000000014 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc3a792bdf R14: 00007f86fd24a300 R15: 0000000000022000 Kernel Offset: disabled Rebooting in 86400 seconds..