IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready list_add double add: new=ffff88804a058160, prev=ffff88804bb10050, next=ffff88804a058160. ------------[ cut here ]------------ kernel BUG at lib/list_debug.c:29! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 6342 Comm: syz-executor.1 Not tainted 5.15.0-syzkaller #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014 RIP: 0010:__list_add_valid.cold+0x26/0x3c lib/list_debug.c:29 Code: 6d cd d8 fa 4c 89 e1 48 c7 c7 20 7e e4 89 e8 00 7f f1 ff 0f 0b 48 89 f2 4c 89 e1 48 89 ee 48 c7 c7 60 7f e4 89 e8 e9 7e f1 ff <0f> 0b 48 89 f1 48 c7 c7 e0 7e e4 89 4c 89 e6 e8 d5 7e f1 ff 0f 0b RSP: 0018:ffffc900029f6b48 EFLAGS: 00010286 RAX: 0000000000000058 RBX: 0000000000000040 RCX: 0000000000000000 RDX: 0000000000040000 RSI: ffffffff815f3b48 RDI: fffff5200053ed5b RBP: ffff88804a058160 R08: 0000000000000058 R09: 0000000000000000 R10: ffffffff815ed92e R11: 0000000000000000 R12: ffff88804a058160 R13: ffff88804a058000 R14: ffff88804a058160 R15: ffff88804a058160 FS: 0000000000000000(0000) GS:ffff88802cb00000(0063) knlGS:00000000f44c5b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 0000000031f29000 CR3: 0000000070f30000 CR4: 0000000000150ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __list_add_rcu include/linux/rculist.h:79 [inline] list_add_rcu include/linux/rculist.h:106 [inline] netif_napi_add+0x3fd/0x9c0 net/core/dev.c:6913 veth_enable_xdp_range+0x1b1/0x300 drivers/net/veth.c:1009 veth_enable_xdp+0x2a5/0x620 drivers/net/veth.c:1063 veth_xdp_set drivers/net/veth.c:1483 [inline] veth_xdp+0x4d4/0x780 drivers/net/veth.c:1523 dev_xdp_install+0xd5/0x270 net/core/dev.c:9384 dev_xdp_attach+0x83d/0x1010 net/core/dev.c:9532 dev_change_xdp_fd+0x246/0x300 net/core/dev.c:9772 do_setlink+0x2fb4/0x3970 net/core/rtnetlink.c:2931 rtnl_group_changelink net/core/rtnetlink.c:3242 [inline] __rtnl_newlink+0xc06/0x1750 net/core/rtnetlink.c:3396 rtnl_newlink+0x64/0xa0 net/core/rtnetlink.c:3506 rtnetlink_rcv_msg+0x413/0xb80 net/core/rtnetlink.c:5571 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2491 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1345 netlink_sendmsg+0x86d/0xda0 net/netlink/af_netlink.c:1916 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:724 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2409 ___sys_sendmsg+0xf3/0x170 net/socket.c:2463 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2492 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c RIP: 0023:0xf6ecb549 Code: 03 74 c0 01 10 05 03 74 b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f44c55fc EFLAGS: 00000296 ORIG_RAX: 0000000000000172 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020000140 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace fa4611ddb22e635e ]--- RIP: 0010:__list_add_valid.cold+0x26/0x3c lib/list_debug.c:29 Code: 6d cd d8 fa 4c 89 e1 48 c7 c7 20 7e e4 89 e8 00 7f f1 ff 0f 0b 48 89 f2 4c 89 e1 48 89 ee 48 c7 c7 60 7f e4 89 e8 e9 7e f1 ff <0f> 0b 48 89 f1 48 c7 c7 e0 7e e4 89 4c 89 e6 e8 d5 7e f1 ff 0f 0b RSP: 0018:ffffc900029f6b48 EFLAGS: 00010286 RAX: 0000000000000058 RBX: 0000000000000040 RCX: 0000000000000000 RDX: 0000000000040000 RSI: ffffffff815f3b48 RDI: fffff5200053ed5b RBP: ffff88804a058160 R08: 0000000000000058 R09: 0000000000000000 R10: ffffffff815ed92e R11: 0000000000000000 R12: ffff88804a058160 R13: ffff88804a058000 R14: ffff88804a058160 R15: ffff88804a058160 FS: 0000000000000000(0000) GS:ffff88802cb00000(0063) knlGS:00000000f44c5b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 0000000031f29000 CR3: 0000000070f30000 CR4: 0000000000150ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 03 74 c0 01 add 0x1(%rax,%rax,8),%esi 4: 10 05 03 74 b8 01 adc %al,0x1b87403(%rip) # 0x1b8740d a: 10 06 adc %al,(%rsi) c: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi 10: 10 07 adc %al,(%rdi) 12: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi 16: 10 08 adc %cl,(%rax) 18: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi 1c: 00 00 add %al,(%rax) 1e: 00 00 add %al,(%rax) 20: 00 51 52 add %dl,0x52(%rcx) 23: 55 push %rbp 24: 89 e5 mov %esp,%ebp 26: 0f 34 sysenter 28: cd 80 int $0x80 * 2a: 5d pop %rbp <-- trapping instruction 2b: 5a pop %rdx 2c: 59 pop %rcx 2d: c3 retq 2e: 90 nop 2f: 90 nop 30: 90 nop 31: 90 nop 32: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 39: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi