Oops: general protection fault, probably for non-canonical address 0xdffffc0000000007: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000038-0x000000000000003f] CPU: 0 UID: 0 PID: 10335 Comm: syz.2.9694 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026 RIP: 0010:rt_cache_valid net/ipv4/route.c:1582 [inline] RIP: 0010:__mkroute_output net/ipv4/route.c:2650 [inline] RIP: 0010:ip_route_output_key_hash_rcu+0x12ba/0x25d0 net/ipv4/route.c:2875 Code: c3 31 ff 89 c6 e8 d6 1a ce f7 85 db 74 5b e8 8d 16 ce f7 eb 05 e8 86 16 ce f7 4d 85 ff 74 36 49 8d 5f 3a 48 89 d8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 0f 85 ff 10 00 00 0f b7 1b bf ff ff 00 00 89 RSP: 0018:ffffc90003d5f5e0 EFLAGS: 00010202 RAX: 0000000000000007 RBX: 0000000000000039 RCX: ffff888026f5bd00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: 0000000080000000 R08: ffff888026f5bd00 R09: 0000000000000003 R10: 0000000000000005 R11: 0000000000000000 R12: dffffc0000000000 R13: 0000000000000000 R14: ffff8880539bba58 R15: ffffffffffffffff FS: 00007f0eacb036c0(0000) GS:ffff8881256f5000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f714fbe0ad8 CR3: 00000000a3ea8000 CR4: 00000000003526f0 DR0: ffffffffffffffff DR1: 00000000000001f8 DR2: 0000000000000083 DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Call Trace: ip_route_output_key_hash+0x18d/0x2a0 net/ipv4/route.c:2705 __ip_route_output_key include/net/route.h:169 [inline] ip_route_output_flow+0x2a/0x150 net/ipv4/route.c:2932 ip_route_output_key include/net/route.h:179 [inline] sctp_v4_get_dst+0x3f8/0x12b0 net/sctp/protocol.c:455 sctp_transport_route+0x118/0x2f0 net/sctp/transport.c:448 sctp_assoc_add_peer+0x650/0x13b0 net/sctp/associola.c:663 sctp_connect_new_asoc+0x329/0x6b0 net/sctp/socket.c:1100 __sctp_connect+0x5cb/0xdc0 net/sctp/socket.c:1198 sctp_getsockopt_connectx3+0x227/0x360 net/sctp/socket.c:1422 sctp_getsockopt+0x984/0xb90 net/sctp/socket.c:8174 do_sock_getsockopt+0x2d3/0x3f0 net/socket.c:2383 __sys_getsockopt net/socket.c:2412 [inline] __do_sys_getsockopt net/socket.c:2419 [inline] __se_sys_getsockopt net/socket.c:2416 [inline] __x64_sys_getsockopt+0x1a4/0x240 net/socket.c:2416 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f0eabb9aeb9 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f0eacb03028 EFLAGS: 00000246 ORIG_RAX: 0000000000000037 RAX: ffffffffffffffda RBX: 00007f0eabe15fa0 RCX: 00007f0eabb9aeb9 RDX: 000000000000006f RSI: 0000000000000084 RDI: 0000000000000006 RBP: 00007f0eabc08c1f R08: 0000200000000140 R09: 0000000000000000 R10: 0000200000000200 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f0eabe16038 R14: 00007f0eabe15fa0 R15: 00007f0eabf3fa48 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:rt_cache_valid net/ipv4/route.c:1582 [inline] RIP: 0010:__mkroute_output net/ipv4/route.c:2650 [inline] RIP: 0010:ip_route_output_key_hash_rcu+0x12ba/0x25d0 net/ipv4/route.c:2875 Code: c3 31 ff 89 c6 e8 d6 1a ce f7 85 db 74 5b e8 8d 16 ce f7 eb 05 e8 86 16 ce f7 4d 85 ff 74 36 49 8d 5f 3a 48 89 d8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 0f 85 ff 10 00 00 0f b7 1b bf ff ff 00 00 89 RSP: 0018:ffffc90003d5f5e0 EFLAGS: 00010202 RAX: 0000000000000007 RBX: 0000000000000039 RCX: ffff888026f5bd00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: 0000000080000000 R08: ffff888026f5bd00 R09: 0000000000000003 R10: 0000000000000005 R11: 0000000000000000 R12: dffffc0000000000 R13: 0000000000000000 R14: ffff8880539bba58 R15: ffffffffffffffff FS: 00007f0eacb036c0(0000) GS:ffff8881256f5000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7150808ff8 CR3: 00000000a3ea8000 CR4: 00000000003526f0 DR0: ffffffffffffffff DR1: 00000000000001f8 DR2: 0000000000000083 DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: c3 ret 1: 31 ff xor %edi,%edi 3: 89 c6 mov %eax,%esi 5: e8 d6 1a ce f7 call 0xf7ce1ae0 a: 85 db test %ebx,%ebx c: 74 5b je 0x69 e: e8 8d 16 ce f7 call 0xf7ce16a0 13: eb 05 jmp 0x1a 15: e8 86 16 ce f7 call 0xf7ce16a0 1a: 4d 85 ff test %r15,%r15 1d: 74 36 je 0x55 1f: 49 8d 5f 3a lea 0x3a(%r15),%rbx 23: 48 89 d8 mov %rbx,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 0f b6 04 20 movzbl (%rax,%r12,1),%eax <-- trapping instruction 2f: 84 c0 test %al,%al 31: 0f 85 ff 10 00 00 jne 0x1136 37: 0f b7 1b movzwl (%rbx),%ebx 3a: bf ff ff 00 00 mov $0xffff,%edi 3f: 89 .byte 0x89