general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 1 PID: 13936 Comm: syz.1.3127 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026 RIP: 0010:__ip_vs_route_output_v6+0x23d/0x320 net/netfilter/ipvs/ip_vs_xmit.c:465 Code: 4d 89 f5 49 81 c5 c0 00 00 00 4c 89 e8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ef e8 ee 2a 21 f9 4d 8b 6d 00 4c 89 e8 48 c1 e8 03 <80> 3c 18 00 49 bf f1 f1 f1 f1 f8 f8 f8 f8 74 08 4c 89 ef e8 cb 2a RSP: 0018:ffffc90005347380 EFLAGS: 00010246 RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffff888028c35a00 RDX: 0000000000000002 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc900053474a0 R08: ffffffff8f22416f R09: 1ffffffff1e4482d R10: dffffc0000000000 R11: fffffbfff1e4482e R12: 1ffff92000a68e74 R13: 0000000000000000 R14: ffff888075a5b280 R15: 0000000000000000 FS: 00007f37ad73a6c0(0000) GS:ffff8880b8d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b3011eff8 CR3: 00000000600d9000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __ip_vs_get_out_rt_v6+0x31d/0xd00 net/netfilter/ipvs/ip_vs_xmit.c:516 ip_vs_dr_xmit_v6+0x96/0x370 net/netfilter/ipvs/ip_vs_xmit.c:1505 ip_vs_in_hook+0xd5d/0x1b70 net/netfilter/ipvs/ip_vs_core.c:2082 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline] nf_hook_slow+0xb5/0x200 net/netfilter/core.c:614 nf_hook include/linux/netfilter.h:269 [inline] __ip6_local_out+0x780/0x8a0 net/ipv6/output_core.c:149 ip6_local_out+0x26/0x120 net/ipv6/output_core.c:159 ip6_send_skb+0x1c9/0x370 net/ipv6/ip6_output.c:1952 udp_v6_send_skb+0xb99/0x1850 net/ipv6/udp.c:1352 udpv6_sendmsg+0x1b9e/0x22c0 net/ipv6/udp.c:1647 sock_sendmsg_nosec net/socket.c:718 [inline] __sock_sendmsg net/socket.c:730 [inline] __sys_sendto+0x497/0x650 net/socket.c:2153 __do_sys_sendto net/socket.c:2165 [inline] __se_sys_sendto net/socket.c:2161 [inline] __x64_sys_sendto+0xda/0xf0 net/socket.c:2161 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f37ac79fb19 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 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 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f37ad73a028 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f37aca25fa0 RCX: 00007f37ac79fb19 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 00007f37ac837af8 R08: 0000200000000c00 R09: 000000000000001c R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f37aca26038 R14: 00007f37aca25fa0 R15: 00007ffc7cd88788 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__ip_vs_route_output_v6+0x23d/0x320 net/netfilter/ipvs/ip_vs_xmit.c:465 Code: 4d 89 f5 49 81 c5 c0 00 00 00 4c 89 e8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ef e8 ee 2a 21 f9 4d 8b 6d 00 4c 89 e8 48 c1 e8 03 <80> 3c 18 00 49 bf f1 f1 f1 f1 f8 f8 f8 f8 74 08 4c 89 ef e8 cb 2a RSP: 0018:ffffc90005347380 EFLAGS: 00010246 RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffff888028c35a00 RDX: 0000000000000002 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc900053474a0 R08: ffffffff8f22416f R09: 1ffffffff1e4482d R10: dffffc0000000000 R11: fffffbfff1e4482e R12: 1ffff92000a68e74 R13: 0000000000000000 R14: ffff888075a5b280 R15: 0000000000000000 FS: 00007f37ad73a6c0(0000) GS:ffff8880b8d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b3011eff8 CR3: 00000000600d9000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 4d 89 f5 mov %r14,%r13 3: 49 81 c5 c0 00 00 00 add $0xc0,%r13 a: 4c 89 e8 mov %r13,%rax d: 48 c1 e8 03 shr $0x3,%rax 11: 80 3c 18 00 cmpb $0x0,(%rax,%rbx,1) 15: 74 08 je 0x1f 17: 4c 89 ef mov %r13,%rdi 1a: e8 ee 2a 21 f9 call 0xf9212b0d 1f: 4d 8b 6d 00 mov 0x0(%r13),%r13 23: 4c 89 e8 mov %r13,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 80 3c 18 00 cmpb $0x0,(%rax,%rbx,1) <-- trapping instruction 2e: 49 bf f1 f1 f1 f1 f8 movabs $0xf8f8f8f8f1f1f1f1,%r15 35: f8 f8 f8 38: 74 08 je 0x42 3a: 4c 89 ef mov %r13,%rdi 3d: e8 .byte 0xe8 3e: cb lret 3f: 2a .byte 0x2a