EXT4-fs (loop1): mounted filesystem without journal. Opts: bsdgroups,nodiscard,noblock_validity,grpjquota=,grpjquota=,noquota,auto_da_alloc,noload,nodiscard,,errors=continue general protection fault, probably for non-canonical address 0xdffffc000000005c: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x00000000000002e0-0x00000000000002e7] CPU: 1 PID: 2311 Comm: syz.1.477 Not tainted 5.10.234-syzkaller-00033-g094fc3778d6b #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:__in6_dev_get include/net/addrconf.h:343 [inline] RIP: 0010:ip6_ignore_linkdown include/net/addrconf.h:434 [inline] RIP: 0010:find_match+0xaa/0xd70 net/ipv6/route.c:739 Code: 00 00 00 00 00 fc ff df 43 80 7c 25 00 00 74 08 48 89 df e8 18 7d 7c fd 48 89 d8 bb e0 02 00 00 48 03 18 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 f7 7c 7c fd 4c 8b 23 4d 85 e4 0f RSP: 0018:ffffc90001526b98 EFLAGS: 00010206 RAX: 000000000000005c RBX: 00000000000002e0 RCX: 0000000000080000 RDX: ffff88811886e2c0 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90001526c18 R08: ffffffff842be13f R09: ffffc90001526f70 R10: ffffc90001526f60 R11: dffffc0000000001 R12: dffffc0000000000 R13: 1ffff110222cd104 R14: 0000000000000000 R15: 0000000000000003 FS: 00007f2b95f9f6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff84d0395a0 CR3: 0000000109a94000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rt6_nh_find_match+0xdd/0x140 net/ipv6/route.c:779 nexthop_for_each_fib6_nh+0x113/0x210 net/ipv4/nexthop.c:602 __find_rr_leaf+0x658/0xb70 net/ipv6/route.c:820 find_rr_leaf net/ipv6/route.c:848 [inline] rt6_select net/ipv6/route.c:892 [inline] fib6_table_lookup+0x338/0xaf0 net/ipv6/route.c:2190 ip6_pol_route+0x151/0x14b0 net/ipv6/route.c:2226 ip6_pol_route_output+0x50/0x80 net/ipv6/route.c:2475 pol_lookup_func include/net/ip6_fib.h:594 [inline] fib6_rule_lookup+0x371/0x620 net/ipv6/fib6_rules.c:120 ip6_route_output_flags_noref+0x252/0x2f0 net/ipv6/route.c:2507 ip6_route_output_flags+0x3f/0x220 net/ipv6/route.c:2520 ip6_route_output include/net/ip6_route.h:98 [inline] ip6_dst_lookup_tail+0x6be/0x1290 net/ipv6/ip6_output.c:1089 ip6_dst_lookup_flow+0xb5/0x170 net/ipv6/ip6_output.c:1219 rawv6_sendmsg+0x1104/0x2110 net/ipv6/raw.c:933 inet_sendmsg+0xa1/0xc0 net/ipv4/af_inet.c:830 sock_sendmsg_nosec net/socket.c:652 [inline] __sock_sendmsg net/socket.c:664 [inline] ____sys_sendmsg+0x59e/0x8f0 net/socket.c:2376 ___sys_sendmsg+0x252/0x2e0 net/socket.c:2430 __sys_sendmmsg+0x2c3/0x510 net/socket.c:2516 __do_sys_sendmmsg net/socket.c:2545 [inline] __se_sys_sendmmsg net/socket.c:2542 [inline] __x64_sys_sendmmsg+0xa0/0xb0 net/socket.c:2542 do_syscall_64+0x34/0x70 arch/x86/entry/common.c:-1 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f2b97977169 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:00007f2b95f9f038 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 00007f2b97b90160 RCX: 00007f2b97977169 RDX: 0000000000000001 RSI: 0000200000001b00 RDI: 0000000000000008 RBP: 00007f2b979f82a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f2b97b90160 R15: 00007ffe02cfec08 Modules linked in: ---[ end trace ddb895156dfe510e ]--- RIP: 0010:__in6_dev_get include/net/addrconf.h:343 [inline] RIP: 0010:ip6_ignore_linkdown include/net/addrconf.h:434 [inline] RIP: 0010:find_match+0xaa/0xd70 net/ipv6/route.c:739 Code: 00 00 00 00 00 fc ff df 43 80 7c 25 00 00 74 08 48 89 df e8 18 7d 7c fd 48 89 d8 bb e0 02 00 00 48 03 18 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 f7 7c 7c fd 4c 8b 23 4d 85 e4 0f RSP: 0018:ffffc90001526b98 EFLAGS: 00010206 RAX: 000000000000005c RBX: 00000000000002e0 RCX: 0000000000080000 RDX: ffff88811886e2c0 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90001526c18 R08: ffffffff842be13f R09: ffffc90001526f70 R10: ffffc90001526f60 R11: dffffc0000000001 R12: dffffc0000000000 R13: 1ffff110222cd104 R14: 0000000000000000 R15: 0000000000000003 FS: 00007f2b95f9f6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff84d0395a0 CR3: 0000000109a94000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 7 bytes skipped: 0: df 43 80 filds -0x80(%rbx) 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 18 7d 7c fd call 0xfd7c7d29 11: 48 89 d8 mov %rbx,%rax 14: bb e0 02 00 00 mov $0x2e0,%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 f7 7c 7c fd call 0xfd7c7d29 32: 4c 8b 23 mov (%rbx),%r12 35: 4d 85 e4 test %r12,%r12 38: 0f .byte 0xf