general protection fault, probably for non-canonical address 0xdffffc000000006c: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000360-0x0000000000000367] CPU: 1 PID: 7578 Comm: syz.1.1031 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 RIP: 0010:__in6_dev_get include/net/addrconf.h:321 [inline] RIP: 0010:ip6_ignore_linkdown include/net/addrconf.h:412 [inline] RIP: 0010:find_match+0xa3/0xc30 net/ipv6/route.c:744 Code: 00 00 00 00 00 fc ff df 42 80 7c 25 00 00 74 08 48 89 df e8 7f f2 2a f9 48 89 d8 bb 60 03 00 00 48 03 18 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 5e f2 2a f9 48 8b 1b e8 36 b3 17 RSP: 0018:ffffc90003c37218 EFLAGS: 00010206 RAX: 000000000000006c RBX: 0000000000000360 RCX: ffff88802a303b80 RDX: 0000000000000002 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 1ffff11004f20a44 R08: ffffc90003c375a0 R09: ffffc90003c375b0 R10: fffff52000786e82 R11: 1ffff92000786e80 R12: dffffc0000000000 R13: 0000000000000040 R14: 1ffff11004f20a45 R15: ffff88802790522f FS: 00007f8f081ea6c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b31d2421c CR3: 0000000053502000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rt6_nh_find_match+0xd5/0x140 net/ipv6/route.c:784 nexthop_for_each_fib6_nh+0x1be/0x3e0 net/ipv4/nexthop.c:1242 __find_rr_leaf+0x45e/0x6c0 net/ipv6/route.c:825 find_rr_leaf net/ipv6/route.c:853 [inline] rt6_select net/ipv6/route.c:897 [inline] fib6_table_lookup+0x39c/0xa70 net/ipv6/route.c:2183 ip6_nh_lookup_table net/ipv6/route.c:3342 [inline] ip6_route_check_nh_onlink net/ipv6/route.c:3360 [inline] ip6_validate_gw net/ipv6/route.c:3467 [inline] fib6_nh_init+0x121f/0x1e00 net/ipv6/route.c:3585 ip6_route_info_create+0x952/0x1210 net/ipv6/route.c:3821 ip6_route_add+0x24/0x130 net/ipv6/route.c:3865 ipv6_route_ioctl+0x37a/0x4a0 net/ipv6/route.c:4492 inet6_ioctl+0x1e9/0x240 net/ipv6/af_inet6.c:585 sock_do_ioctl+0xd3/0x2f0 net/socket.c:1140 sock_ioctl+0x4ed/0x6e0 net/socket.c:1257 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl+0xfa/0x170 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f8f09f82ec9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f8f081ea038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f8f0a1d9fa0 RCX: 00007f8f09f82ec9 RDX: 0000200000000540 RSI: 000000000000890b RDI: 0000000000000003 RBP: 00007f8f0a005f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f8f0a1da038 R14: 00007f8f0a1d9fa0 R15: 00007ffcfb1e4018 Modules linked in: ---[ end trace ef2abf6b7e499a0d ]--- RIP: 0010:__in6_dev_get include/net/addrconf.h:321 [inline] RIP: 0010:ip6_ignore_linkdown include/net/addrconf.h:412 [inline] RIP: 0010:find_match+0xa3/0xc30 net/ipv6/route.c:744 Code: 00 00 00 00 00 fc ff df 42 80 7c 25 00 00 74 08 48 89 df e8 7f f2 2a f9 48 89 d8 bb 60 03 00 00 48 03 18 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 5e f2 2a f9 48 8b 1b e8 36 b3 17 RSP: 0018:ffffc90003c37218 EFLAGS: 00010206 RAX: 000000000000006c RBX: 0000000000000360 RCX: ffff88802a303b80 RDX: 0000000000000002 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 1ffff11004f20a44 R08: ffffc90003c375a0 R09: ffffc90003c375b0 R10: fffff52000786e82 R11: 1ffff92000786e80 R12: dffffc0000000000 R13: 0000000000000040 R14: 1ffff11004f20a45 R15: ffff88802790522f FS: 00007f8f081ea6c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f8f081c8f98 CR3: 0000000053502000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 7 bytes skipped: 0: df 42 80 filds -0x80(%rdx) 3: 7c 25 jl 0x2a 5: 00 00 add %al,(%rax) 7: 74 08 je 0x11 9: 48 89 df mov %rbx,%rdi c: e8 7f f2 2a f9 call 0xf92af290 11: 48 89 d8 mov %rbx,%rax 14: bb 60 03 00 00 mov $0x360,%ebx 19: 48 03 18 add (%rax),%rbx 1c: 48 89 d8 mov %rbx,%rax 1f: 48 c1 e8 03 shr $0x3,%rax * 23: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1) <-- trapping instruction 28: 74 08 je 0x32 2a: 48 89 df mov %rbx,%rdi 2d: e8 5e f2 2a f9 call 0xf92af290 32: 48 8b 1b mov (%rbx),%rbx 35: e8 .byte 0xe8 36: 36 b3 17 ss mov $0x17,%bl