Oops: general protection fault, probably for non-canonical address 0xdffffc0000000018: 0000 [#1] SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x00000000000000c0-0x00000000000000c7] CPU: 3 UID: 0 PID: 11793 Comm: syz.6.1816 Not tainted 6.15.0-rc3-syzkaller-00076-ge72e9e693307 #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:__in6_dev_get include/net/addrconf.h:347 [inline] RIP: 0010:ip6_ignore_linkdown include/net/addrconf.h:443 [inline] RIP: 0010:find_match+0x136/0x15d0 net/ipv6/route.c:781 Code: 48 c1 ea 03 80 3c 02 00 0f 85 ac 11 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 7d 00 49 8d bf c0 00 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 93 11 00 00 4d 8b bf c0 00 00 00 e8 74 9e 54 01 RSP: 0018:ffffc900037cf058 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: 0000000000000003 RCX: ffffc90027ee1000 RDX: 0000000000000018 RSI: ffffffff8a1a679f RDI: 00000000000000c0 RBP: ffffc900037cf160 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff88806911d837 R13: ffff88806911d820 R14: 1ffff920006f9e1a R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff888097abf000(0063) knlGS:00000000f502eb40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000000068b5a000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 000000000000000e DR6: 00000000ffff0ff0 DR7: 0000000000000400 Call Trace: rt6_nh_find_match+0xfa/0x1a0 net/ipv6/route.c:821 nexthop_for_each_fib6_nh+0x165/0x4a0 net/ipv4/nexthop.c:1515 __find_rr_leaf+0x6e5/0xe00 net/ipv6/route.c:862 find_rr_leaf net/ipv6/route.c:890 [inline] rt6_select net/ipv6/route.c:934 [inline] fib6_table_lookup+0x57c/0xa30 net/ipv6/route.c:2230 ip6_pol_route+0x1cc/0x1230 net/ipv6/route.c:2266 pol_lookup_func include/net/ip6_fib.h:616 [inline] __fib6_rule_action net/ipv6/fib6_rules.c:237 [inline] fib6_rule_action+0x283/0x910 net/ipv6/fib6_rules.c:275 fib_rules_lookup+0x459/0x1030 net/core/fib_rules.c:339 fib6_rule_lookup+0x18b/0x720 net/ipv6/fib6_rules.c:112 ip6_route_output_flags_noref net/ipv6/route.c:2674 [inline] ip6_route_output_flags+0x1d0/0x640 net/ipv6/route.c:2686 ip6_route_output include/net/ip6_route.h:93 [inline] ip6_dst_lookup_tail.constprop.0+0xa52/0x2140 net/ipv6/ip6_output.c:1128 ip6_dst_lookup_flow+0x99/0x1d0 net/ipv6/ip6_output.c:1259 tcp_v6_connect+0xe11/0x2150 net/ipv6/tcp_ipv6.c:277 mptcp_connect+0x579/0xfe0 net/mptcp/protocol.c:3683 __inet_stream_connect+0x3c5/0x1020 net/ipv4/af_inet.c:677 inet_stream_connect+0x57/0xa0 net/ipv4/af_inet.c:748 __sys_connect_file+0x13e/0x1a0 net/socket.c:2038 __sys_connect+0x14d/0x170 net/socket.c:2057 __do_sys_connect net/socket.c:2063 [inline] __se_sys_connect net/socket.c:2060 [inline] __ia32_sys_connect+0x71/0xb0 net/socket.c:2060 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline] __do_fast_syscall_32+0x73/0x120 arch/x86/entry/syscall_32.c:306 do_fast_syscall_32+0x32/0x80 arch/x86/entry/syscall_32.c:331 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf703e579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f502e55c EFLAGS: 00000296 ORIG_RAX: 000000000000016a RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000080000040 RDX: 000000000000001c RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000296 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__in6_dev_get include/net/addrconf.h:347 [inline] RIP: 0010:ip6_ignore_linkdown include/net/addrconf.h:443 [inline] RIP: 0010:find_match+0x136/0x15d0 net/ipv6/route.c:781 Code: 48 c1 ea 03 80 3c 02 00 0f 85 ac 11 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 7d 00 49 8d bf c0 00 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 93 11 00 00 4d 8b bf c0 00 00 00 e8 74 9e 54 01 RSP: 0018:ffffc900037cf058 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: 0000000000000003 RCX: ffffc90027ee1000 RDX: 0000000000000018 RSI: ffffffff8a1a679f RDI: 00000000000000c0 RBP: ffffc900037cf160 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff88806911d837 R13: ffff88806911d820 R14: 1ffff920006f9e1a R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880979bf000(0063) knlGS:00000000f502eb40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000000068b5a000 CR4: 0000000000352ef0 DR0: 0000000000000007 DR1: 000000000000000b DR2: 0000000000000002 DR3: 0000000000000009 DR6: 00000000ffff0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 48 c1 ea 03 shr $0x3,%rdx 4: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) 8: 0f 85 ac 11 00 00 jne 0x11ba e: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 15: fc ff df 18: 4d 8b 7d 00 mov 0x0(%r13),%r15 1c: 49 8d bf c0 00 00 00 lea 0xc0(%r15),%rdi 23: 48 89 fa mov %rdi,%rdx 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2e: 0f 85 93 11 00 00 jne 0x11c7 34: 4d 8b bf c0 00 00 00 mov 0xc0(%r15),%r15 3b: e8 74 9e 54 01 call 0x1549eb4