general protection fault, probably for non-canonical address 0xe80e732020000060: 0000 [#1] PREEMPT SMP KASAN KASAN: maybe wild-memory-access in range [0x4073b90100000300-0x4073b90100000307] CPU: 0 PID: 5445 Comm: syz-executor.4 Not tainted 6.6.0-next-20231106-syzkaller-16504-g3ff7a5781cee #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 RIP: 0010:neigh_flush_dev+0x195/0x8b0 net/core/neighbour.c:388 Code: 1c 24 48 85 db 0f 84 41 05 00 00 e8 55 6e 0e f9 48 83 3c 24 00 74 38 e8 49 6e 0e f9 48 8d bb 08 03 00 00 48 89 f8 48 c1 e8 03 <42> 80 3c 30 00 0f 85 58 06 00 00 48 8b 04 24 48 39 83 08 03 00 00 RSP: 0018:ffffc90004ea7100 EFLAGS: 00010207 RAX: 080e772020000060 RBX: 4073b900ffffffff RCX: ffffffff887a974b RDX: ffff88801dd8d940 RSI: ffffffff887a93c7 RDI: 4073b90100000307 RBP: ffffed10051d2fd0 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffff888063b96000 R13: ffff888028e97e80 R14: dffffc0000000000 R15: 0000000000000050 FS: 0000555555bbc480(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055f29b497131 CR3: 0000000026d72000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: neigh_changeaddr+0x2f/0x40 net/core/neighbour.c:430 ndisc_netdev_event+0xf0/0x570 net/ipv6/ndisc.c:1877 notifier_call_chain+0xb6/0x3c0 kernel/notifier.c:93 call_netdevice_notifiers_info+0xbe/0x130 net/core/dev.c:1965 call_netdevice_notifiers_extack net/core/dev.c:2003 [inline] call_netdevice_notifiers net/core/dev.c:2017 [inline] dev_set_mac_address+0x36f/0x4a0 net/core/dev.c:8866 dev_set_mac_address_user+0x30/0x50 net/core/dev.c:8880 do_setlink+0x6ee/0x3fa0 net/core/rtnetlink.c:2864 __rtnl_newlink+0xc1f/0x1930 net/core/rtnetlink.c:3707 rtnl_newlink+0x67/0xa0 net/core/rtnetlink.c:3754 rtnetlink_rcv_msg+0x3c7/0xe00 net/core/rtnetlink.c:6558 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2545 netlink_unicast_kernel net/netlink/af_netlink.c:1342 [inline] netlink_unicast+0x53b/0x810 net/netlink/af_netlink.c:1368 netlink_sendmsg+0x939/0xe40 net/netlink/af_netlink.c:1910 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0xd5/0x180 net/socket.c:745 __sys_sendto+0x255/0x340 net/socket.c:2190 __do_sys_sendto net/socket.c:2202 [inline] __se_sys_sendto net/socket.c:2198 [inline] __x64_sys_sendto+0xe0/0x1b0 net/socket.c:2198 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x62/0x6a RIP: 0033:0x7f6581c7e7dc Code: 1a 51 02 00 44 8b 4c 24 2c 4c 8b 44 24 20 89 c5 44 8b 54 24 28 48 8b 54 24 18 b8 2c 00 00 00 48 8b 74 24 10 8b 7c 24 08 0f 05 <48> 3d 00 f0 ff ff 77 34 89 ef 48 89 44 24 08 e8 60 51 02 00 48 8b RSP: 002b:00007ffd7a849060 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f65828c4620 RCX: 00007f6581c7e7dc RDX: 000000000000002c RSI: 00007f65828c4670 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007ffd7a8490b4 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000001 R13: 0000000000000000 R14: 00007f65828c4670 R15: 0000000000000000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:neigh_flush_dev+0x195/0x8b0 net/core/neighbour.c:388 Code: 1c 24 48 85 db 0f 84 41 05 00 00 e8 55 6e 0e f9 48 83 3c 24 00 74 38 e8 49 6e 0e f9 48 8d bb 08 03 00 00 48 89 f8 48 c1 e8 03 <42> 80 3c 30 00 0f 85 58 06 00 00 48 8b 04 24 48 39 83 08 03 00 00 RSP: 0018:ffffc90004ea7100 EFLAGS: 00010207 RAX: 080e772020000060 RBX: 4073b900ffffffff RCX: ffffffff887a974b RDX: ffff88801dd8d940 RSI: ffffffff887a93c7 RDI: 4073b90100000307 RBP: ffffed10051d2fd0 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffff888063b96000 R13: ffff888028e97e80 R14: dffffc0000000000 R15: 0000000000000050 FS: 0000555555bbc480(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055f29b497131 CR3: 0000000026d72000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 1c 24 sbb $0x24,%al 2: 48 85 db test %rbx,%rbx 5: 0f 84 41 05 00 00 je 0x54c b: e8 55 6e 0e f9 call 0xf90e6e65 10: 48 83 3c 24 00 cmpq $0x0,(%rsp) 15: 74 38 je 0x4f 17: e8 49 6e 0e f9 call 0xf90e6e65 1c: 48 8d bb 08 03 00 00 lea 0x308(%rbx),%rdi 23: 48 89 f8 mov %rdi,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 30 00 cmpb $0x0,(%rax,%r14,1) <-- trapping instruction 2f: 0f 85 58 06 00 00 jne 0x68d 35: 48 8b 04 24 mov (%rsp),%rax 39: 48 39 83 08 03 00 00 cmp %rax,0x308(%rbx)