Oops: general protection fault, probably for non-canonical address 0xdffffc0000000004: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000020-0x0000000000000027] CPU: 0 UID: 0 PID: 31629 Comm: syz.4.8241 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 RIP: 0010:kernel_sock_shutdown+0x2a/0x70 net/socket.c:3785 Code: f3 0f 1e fa 41 57 41 56 41 54 53 89 f3 49 89 fe 49 bc 00 00 00 00 00 fc ff df e8 21 67 52 f8 4d 8d 7e 20 4c 89 f8 48 c1 e8 03 <42> 80 3c 20 00 74 08 4c 89 ff e8 67 a7 bd f8 4d 8b 3f 49 83 c7 68 RSP: 0018:ffffc9000cf5f0b0 EFLAGS: 00010202 RAX: 0000000000000004 RBX: 0000000000000002 RCX: ffff88807ed0dc40 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffff88802b238083 R09: 1ffff11005647010 R10: dffffc0000000000 R11: ffffed1005647011 R12: dffffc0000000000 R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000020 FS: 00007fdbdf4766c0(0000) GS:ffff888125276000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000001a40 CR3: 00000000871ec000 CR4: 00000000003526f0 Call Trace: udp_tunnel_sock_release+0x6d/0x80 net/ipv4/udp_tunnel_core.c:197 rxe_release_udp_tunnel drivers/infiniband/sw/rxe/rxe_net.c:294 [inline] rxe_sock_put drivers/infiniband/sw/rxe/rxe_net.c:639 [inline] rxe_net_del+0xfb/0x280 drivers/infiniband/sw/rxe/rxe_net.c:660 rxe_dellink+0x15/0x20 drivers/infiniband/sw/rxe/rxe.c:254 nldev_dellink+0x304/0x3d0 drivers/infiniband/core/nldev.c:1849 rdma_nl_rcv_msg drivers/infiniband/core/netlink.c:-1 [inline] rdma_nl_rcv_skb drivers/infiniband/core/netlink.c:239 [inline] rdma_nl_rcv+0x6d1/0xa10 drivers/infiniband/core/netlink.c:259 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline] netlink_unicast+0x75c/0x8e0 net/netlink/af_netlink.c:1345 netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1895 sock_sendmsg_nosec net/socket.c:787 [inline] __sock_sendmsg net/socket.c:802 [inline] ____sys_sendmsg+0x972/0x9f0 net/socket.c:2698 ___sys_sendmsg+0x2a5/0x360 net/socket.c:2752 __sys_sendmsg net/socket.c:2784 [inline] __do_sys_sendmsg net/socket.c:2789 [inline] __se_sys_sendmsg net/socket.c:2787 [inline] __x64_sys_sendmsg+0x1bd/0x2a0 net/socket.c:2787 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fdbde59ce59 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:00007fdbdf476028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fdbde815fa0 RCX: 00007fdbde59ce59 RDX: 0000000000000004 RSI: 00002000000002c0 RDI: 000000000000000f RBP: 00007fdbde632d6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fdbde816038 R14: 00007fdbde815fa0 R15: 00007ffcb74f1aa8 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:kernel_sock_shutdown+0x2a/0x70 net/socket.c:3785 Code: f3 0f 1e fa 41 57 41 56 41 54 53 89 f3 49 89 fe 49 bc 00 00 00 00 00 fc ff df e8 21 67 52 f8 4d 8d 7e 20 4c 89 f8 48 c1 e8 03 <42> 80 3c 20 00 74 08 4c 89 ff e8 67 a7 bd f8 4d 8b 3f 49 83 c7 68 RSP: 0018:ffffc9000cf5f0b0 EFLAGS: 00010202 RAX: 0000000000000004 RBX: 0000000000000002 RCX: ffff88807ed0dc40 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffff88802b238083 R09: 1ffff11005647010 R10: dffffc0000000000 R11: ffffed1005647011 R12: dffffc0000000000 R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000020 FS: 00007fdbdf4766c0(0000) GS:ffff888125376000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe6d9023e9c CR3: 00000000871ec000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess): 0: f3 0f 1e fa endbr64 4: 41 57 push %r15 6: 41 56 push %r14 8: 41 54 push %r12 a: 53 push %rbx b: 89 f3 mov %esi,%ebx d: 49 89 fe mov %rdi,%r14 10: 49 bc 00 00 00 00 00 movabs $0xdffffc0000000000,%r12 17: fc ff df 1a: e8 21 67 52 f8 call 0xf8526740 1f: 4d 8d 7e 20 lea 0x20(%r14),%r15 23: 4c 89 f8 mov %r15,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1) <-- trapping instruction 2f: 74 08 je 0x39 31: 4c 89 ff mov %r15,%rdi 34: e8 67 a7 bd f8 call 0xf8bda7a0 39: 4d 8b 3f mov (%r15),%r15 3c: 49 83 c7 68 add $0x68,%r15