general protection fault, probably for non-canonical address 0xdffffc000000005e: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x00000000000002f0-0x00000000000002f7] CPU: 0 PID: 24002 Comm: syz.6.9998 Tainted: G W 5.15.185-syzkaller-00071-g79bd7c447241 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:__in6_dev_get include/net/addrconf.h:341 [inline] RIP: 0010:ip6_ignore_linkdown include/net/addrconf.h:432 [inline] RIP: 0010:find_match+0xb7/0xf20 net/ipv6/route.c:744 Code: 7c 05 00 00 74 08 48 89 df e8 65 36 87 fd 48 89 d8 bb f0 02 00 00 48 03 18 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 48 89 df e8 3b 36 87 fd 48 8b 1b 48 85 db 0f 84 RSP: 0018:ffffc90000ac6f20 EFLAGS: 00010202 RAX: 000000000000005e RBX: 00000000000002f0 RCX: dffffc0000000000 RDX: 0000000000000002 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90000ac6fd8 R08: ffffc90000ac7300 R09: ffffc90000ac7310 R10: fffff52000158e82 R11: 1ffff92000158e7e R12: 0000000000000201 R13: 1ffff110291387c4 R14: 0000000000000000 R15: 0000000000000003 FS: 00007fa0e07e86c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00002000000013c0 CR3: 0000000128d16000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rt6_nh_find_match+0xd9/0x140 net/ipv6/route.c:784 nexthop_for_each_fib6_nh+0xf6/0x1e0 net/ipv4/nexthop.c:1242 __find_rr_leaf+0x50f/0x900 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+0x2f4/0x9f0 net/ipv6/route.c:2189 ip6_pol_route+0x145/0x1110 net/ipv6/route.c:2225 ip6_pol_route_output+0x51/0x80 net/ipv6/route.c:2601 pol_lookup_func include/net/ip6_fib.h:592 [inline] __fib6_rule_action net/ipv6/fib6_rules.c:232 [inline] fib6_rule_action+0x1c7/0x710 net/ipv6/fib6_rules.c:270 fib_rules_lookup+0x489/0x8d0 net/core/fib_rules.c:318 fib6_rule_lookup+0x179/0x560 net/ipv6/fib6_rules.c:107 ip6_route_output_flags_noref+0x283/0x340 net/ipv6/route.c:2633 ip6_route_output_flags+0x3c/0x200 net/ipv6/route.c:2646 ip6_route_output include/net/ip6_route.h:98 [inline] ip6_dst_lookup_tail+0x139/0x1370 net/ipv6/ip6_output.c:1102 ip6_dst_lookup_flow+0x49/0xc0 net/ipv6/ip6_output.c:1232 tcp_v6_connect+0x8cf/0x1860 net/ipv6/tcp_ipv6.c:284 __inet_stream_connect+0x2a7/0xe10 net/ipv4/af_inet.c:669 inet_stream_connect+0x62/0xa0 net/ipv4/af_inet.c:733 __sys_connect_file net/socket.c:1923 [inline] __sys_connect+0x389/0x410 net/socket.c:1940 __do_sys_connect net/socket.c:1950 [inline] __se_sys_connect net/socket.c:1947 [inline] __x64_sys_connect+0x7a/0x90 net/socket.c:1947 x64_sys_call+0x7c/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:43 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: 0033:0x7fa0e217f929 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:00007fa0e07e8038 EFLAGS: 00000246 ORIG_RAX: 000000000000002a RAX: ffffffffffffffda RBX: 00007fa0e23a6fa0 RCX: 00007fa0e217f929 RDX: 000000000000001c RSI: 0000200000000e40 RDI: 0000000000000003 RBP: 00007fa0e2201b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fa0e23a6fa0 R15: 00007fffa3cda618 Modules linked in: ---[ end trace 72ab4f07eb93761e ]--- RIP: 0010:__in6_dev_get include/net/addrconf.h:341 [inline] RIP: 0010:ip6_ignore_linkdown include/net/addrconf.h:432 [inline] RIP: 0010:find_match+0xb7/0xf20 net/ipv6/route.c:744 Code: 7c 05 00 00 74 08 48 89 df e8 65 36 87 fd 48 89 d8 bb f0 02 00 00 48 03 18 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 48 89 df e8 3b 36 87 fd 48 8b 1b 48 85 db 0f 84 RSP: 0018:ffffc90000ac6f20 EFLAGS: 00010202 RAX: 000000000000005e RBX: 00000000000002f0 RCX: dffffc0000000000 RDX: 0000000000000002 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90000ac6fd8 R08: ffffc90000ac7300 R09: ffffc90000ac7310 R10: fffff52000158e82 R11: 1ffff92000158e7e R12: 0000000000000201 R13: 1ffff110291387c4 R14: 0000000000000000 R15: 0000000000000003 FS: 00007fa0e07e86c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2e51bff8 CR3: 0000000128d16000 CR4: 00000000003506a0 DR0: 0000000000000007 DR1: 0000000000000002 DR2: 0000000000000008 DR3: 1000000100000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 7c 05 jl 0x7 2: 00 00 add %al,(%rax) 4: 74 08 je 0xe 6: 48 89 df mov %rbx,%rdi 9: e8 65 36 87 fd call 0xfd873673 e: 48 89 d8 mov %rbx,%rax 11: bb f0 02 00 00 mov $0x2f0,%ebx 16: 48 03 18 add (%rax),%rbx 19: 48 89 d8 mov %rbx,%rax 1c: 48 c1 e8 03 shr $0x3,%rax 20: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx 27: fc ff df * 2a: 80 3c 08 00 cmpb $0x0,(%rax,%rcx,1) <-- trapping instruction 2e: 74 08 je 0x38 30: 48 89 df mov %rbx,%rdi 33: e8 3b 36 87 fd call 0xfd873673 38: 48 8b 1b mov (%rbx),%rbx 3b: 48 85 db test %rbx,%rbx 3e: 0f .byte 0xf 3f: 84 .byte 0x84