bond0: enslaved VLAN challenged slave hsr1. Adding VLANs will be blocked as long as hsr1 is part of bond bond0 bond0: The slave device specified does not support setting the MAC address kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 10917 Comm: syz-executor.2 Not tainted 4.19.163-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:hsr_dev_change_mtu+0xa2/0xd0 net/hsr/hsr_device.c:149 Code: 89 e0 5b 5d 41 5c 41 5d c3 e8 6a f5 8e f9 eb e1 e8 63 ca 58 f9 49 8d 7d 10 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 1d 49 8b 7d 10 ba 06 00 00 00 48 c7 c6 60 45 70 89 RSP: 0018:ffff888041ab6a28 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 00000000000005dc RCX: ffffc9000a45d000 RDX: 0000000000000002 RSI: ffffffff880c05ad RDI: 0000000000000010 RBP: ffff88804ce38e40 R08: 0000000000000000 R09: 00000000000005d6 R10: 0000000000000004 R11: 0000000000000000 R12: 00000000000005d6 R13: 0000000000000000 R14: ffff88804ce39088 R15: 0000000000000001 FS: 00007fc0b6a78700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffe3338fc30 CR3: 00000000a921d000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __dev_set_mtu net/core/dev.c:7755 [inline] dev_set_mtu_ext+0x339/0x580 net/core/dev.c:7808 dev_set_mtu+0x95/0x120 net/core/dev.c:7832 bond_enslave+0x70c/0x5230 drivers/net/bonding/bond_main.c:1530 do_set_master+0x1c8/0x220 net/core/rtnetlink.c:2321 do_setlink+0x7ec/0x3540 net/core/rtnetlink.c:2455 rtnl_newlink+0xda0/0x15b0 net/core/rtnetlink.c:3077 rtnetlink_rcv_msg+0x453/0xb80 net/core/rtnetlink.c:4778 netlink_rcv_skb+0x160/0x440 net/netlink/af_netlink.c:2455 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x4d5/0x690 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x6bb/0xc40 net/netlink/af_netlink.c:1909 sock_sendmsg_nosec net/socket.c:622 [inline] sock_sendmsg+0xc3/0x120 net/socket.c:632 ___sys_sendmsg+0x7bb/0x8e0 net/socket.c:2115 __sys_sendmsg net/socket.c:2153 [inline] __do_sys_sendmsg net/socket.c:2162 [inline] __se_sys_sendmsg net/socket.c:2160 [inline] __x64_sys_sendmsg+0x132/0x220 net/socket.c:2160 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45e149 Code: 0d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fc0b6a77c68 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045e149 RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000005 RBP: 000000000119c110 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119c0dc R13: 00007ffe39ecd00f R14: 00007fc0b6a789c0 R15: 000000000119c0dc Modules linked in: ---[ end trace 6ac36c903ec30c1d ]--- RIP: 0010:hsr_dev_change_mtu+0xa2/0xd0 net/hsr/hsr_device.c:149 Code: 89 e0 5b 5d 41 5c 41 5d c3 e8 6a f5 8e f9 eb e1 e8 63 ca 58 f9 49 8d 7d 10 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 1d 49 8b 7d 10 ba 06 00 00 00 48 c7 c6 60 45 70 89 RSP: 0018:ffff888041ab6a28 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 00000000000005dc RCX: ffffc9000a45d000 RDX: 0000000000000002 RSI: ffffffff880c05ad RDI: 0000000000000010 RBP: ffff88804ce38e40 R08: 0000000000000000 R09: 00000000000005d6 R10: 0000000000000004 R11: 0000000000000000 R12: 00000000000005d6 R13: 0000000000000000 R14: ffff88804ce39088 R15: 0000000000000001 FS: 00007fc0b6a78700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b3172b000 CR3: 00000000a921d000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400