Oops: general protection fault, probably for non-canonical address 0xdffffc000000000c: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000060-0x0000000000000067] CPU: 1 UID: 0 PID: 20537 Comm: syz.5.3646 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:fib6_nh_get_excptn_bucket net/ipv6/route.c:1662 [inline] RIP: 0010:rt6_find_cached_rt+0xb9/0x270 net/ipv6/route.c:1860 Code: 48 c1 e8 03 48 89 44 24 08 48 8b 44 24 08 80 3c 18 00 74 08 4c 89 f7 e8 35 58 2c f8 49 8b 2e 48 83 c5 60 48 89 e8 48 c1 e8 03 <80> 3c 18 00 74 08 48 89 ef e8 19 58 2c f8 4c 8b 6d 00 e8 a0 3b 4d RSP: 0018:ffffc900032d68c0 EFLAGS: 00010206 RAX: 000000000000000c RBX: dffffc0000000000 RCX: 0000000000000002 RDX: ffff8880255e9e40 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000060 R08: ffff8880261aac33 R09: 1ffff11004c35586 R10: dffffc0000000000 R11: ffffed1004c35587 R12: ffffc900032d6998 R13: 0000000000000000 R14: ffffc900032d6990 R15: 0000000000000000 FS: 00007f558fc856c0(0000) GS:ffff888126239000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000020000025a030 CR3: 0000000075b14000 CR4: 00000000003526f0 DR0: 00000000ffffa75b DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Call Trace: ip6_pol_route+0x28d/0x1180 net/ipv6/route.c:2276 pol_lookup_func include/net/ip6_fib.h:617 [inline] __fib6_rule_action net/ipv6/fib6_rules.c:237 [inline] fib6_rule_action+0x206/0x7d0 net/ipv6/fib6_rules.c:275 fib_rules_lookup+0x767/0xe90 net/core/fib_rules.c:339 fib6_rule_lookup+0x18e/0x6f0 net/ipv6/fib6_rules.c:112 ip6_route_output_flags_noref net/ipv6/route.c:2684 [inline] ip6_route_output_flags+0x364/0x5d0 net/ipv6/route.c:2696 ip6_dst_lookup_tail+0x299/0x1510 net/ipv6/ip6_output.c:1169 ip6_dst_lookup_flow+0x47/0xe0 net/ipv6/ip6_output.c:1272 tipc_udp_xmit+0x315/0xb60 net/tipc/udp_media.c:210 tipc_bearer_xmit_skb+0x2b3/0x400 net/tipc/bearer.c:575 tipc_enable_bearer net/tipc/bearer.c:366 [inline] __tipc_nl_bearer_enable+0x1044/0x13f0 net/tipc/bearer.c:1047 tipc_nl_bearer_enable+0x22/0x40 net/tipc/bearer.c:1056 genl_family_rcv_msg_doit+0x215/0x300 net/netlink/genetlink.c:1115 genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline] genl_rcv_msg+0x60e/0x790 net/netlink/genetlink.c:1210 netlink_rcv_skb+0x208/0x470 net/netlink/af_netlink.c:2552 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219 netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline] netlink_unicast+0x82f/0x9e0 net/netlink/af_netlink.c:1346 netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1896 sock_sendmsg_nosec net/socket.c:727 [inline] __sock_sendmsg+0x21c/0x270 net/socket.c:742 ____sys_sendmsg+0x505/0x830 net/socket.c:2630 ___sys_sendmsg+0x21f/0x2a0 net/socket.c:2684 __sys_sendmsg net/socket.c:2716 [inline] __do_sys_sendmsg net/socket.c:2721 [inline] __se_sys_sendmsg net/socket.c:2719 [inline] __x64_sys_sendmsg+0x19b/0x260 net/socket.c:2719 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f558ed8f749 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:00007f558fc85038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f558efe6090 RCX: 00007f558ed8f749 RDX: 0000000000000000 RSI: 00002000000010c0 RDI: 0000000000000009 RBP: 00007f558ee13f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f558efe6128 R14: 00007f558efe6090 R15: 00007f558f10fa28 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:fib6_nh_get_excptn_bucket net/ipv6/route.c:1662 [inline] RIP: 0010:rt6_find_cached_rt+0xb9/0x270 net/ipv6/route.c:1860 Code: 48 c1 e8 03 48 89 44 24 08 48 8b 44 24 08 80 3c 18 00 74 08 4c 89 f7 e8 35 58 2c f8 49 8b 2e 48 83 c5 60 48 89 e8 48 c1 e8 03 <80> 3c 18 00 74 08 48 89 ef e8 19 58 2c f8 4c 8b 6d 00 e8 a0 3b 4d RSP: 0018:ffffc900032d68c0 EFLAGS: 00010206 RAX: 000000000000000c RBX: dffffc0000000000 RCX: 0000000000000002 RDX: ffff8880255e9e40 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000060 R08: ffff8880261aac33 R09: 1ffff11004c35586 R10: dffffc0000000000 R11: ffffed1004c35587 R12: ffffc900032d6998 R13: 0000000000000000 R14: ffffc900032d6990 R15: 0000000000000000 FS: 00007f558fc856c0(0000) GS:ffff888126239000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000020000025a030 CR3: 0000000075b14000 CR4: 00000000003526f0 DR0: 00000000ffffa75b DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 48 c1 e8 03 shr $0x3,%rax 4: 48 89 44 24 08 mov %rax,0x8(%rsp) 9: 48 8b 44 24 08 mov 0x8(%rsp),%rax e: 80 3c 18 00 cmpb $0x0,(%rax,%rbx,1) 12: 74 08 je 0x1c 14: 4c 89 f7 mov %r14,%rdi 17: e8 35 58 2c f8 call 0xf82c5851 1c: 49 8b 2e mov (%r14),%rbp 1f: 48 83 c5 60 add $0x60,%rbp 23: 48 89 e8 mov %rbp,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 80 3c 18 00 cmpb $0x0,(%rax,%rbx,1) <-- trapping instruction 2e: 74 08 je 0x38 30: 48 89 ef mov %rbp,%rdi 33: e8 19 58 2c f8 call 0xf82c5851 38: 4c 8b 6d 00 mov 0x0(%rbp),%r13 3c: e8 .byte 0xe8 3d: a0 .byte 0xa0 3e: 3b .byte 0x3b 3f: 4d rex.WRB