Oops: general protection fault, probably for non-canonical address 0xdffffc000000000d: 0000 [#1] SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000068-0x000000000000006f] CPU: 3 UID: 0 PID: 12652 Comm: syz.7.1709 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 RIP: 0010:kernel_sock_shutdown+0x47/0x70 net/socket.c:3785 Code: fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 33 48 b8 00 00 00 00 00 fc ff df 4c 8b 63 20 49 8d 7c 24 68 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 1a 49 8b 44 24 68 89 ee 48 89 df 5b 5d 41 5c e9 46 RSP: 0018:ffffc9000566f180 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffff888058587240 RCX: 0000000000000000 RDX: 000000000000000d RSI: ffffffff895ced12 RDI: 0000000000000068 RBP: 0000000000000002 R08: 0000000000000001 R09: ffffed1006d98945 R10: ffff888036cc4a2b R11: 0000003683c25c00 R12: 0000000000000000 R13: ffff88805c998000 R14: 0000000000000002 R15: 0000000000000018 FS: 00007f1306d976c0(0000) GS:ffff8880d65db000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1306d97d58 CR3: 00000000404f1000 CR4: 0000000000352ef0 DR0: ffffffffffffffff DR1: 00000000000001f8 DR2: 0000000000000002 DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Call Trace: udp_tunnel_sock_release+0x68/0x80 net/ipv4/udp_tunnel_core.c:202 rxe_release_udp_tunnel drivers/infiniband/sw/rxe/rxe_net.c:294 [inline] rxe_sock_put+0xae/0x130 drivers/infiniband/sw/rxe/rxe_net.c:639 rxe_net_del+0x83/0x120 drivers/infiniband/sw/rxe/rxe_net.c:660 rxe_dellink+0x15/0x20 drivers/infiniband/sw/rxe/rxe.c:254 nldev_dellink+0x289/0x3c0 drivers/infiniband/core/nldev.c:1849 rdma_nl_rcv_msg+0x392/0x6f0 drivers/infiniband/core/netlink.c:195 rdma_nl_rcv_skb.constprop.0.isra.0+0x2cb/0x410 drivers/infiniband/core/netlink.c:239 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x585/0x850 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x8b0/0xda0 net/netlink/af_netlink.c:1894 sock_sendmsg_nosec net/socket.c:787 [inline] __sock_sendmsg net/socket.c:802 [inline] ____sys_sendmsg+0x9e1/0xb70 net/socket.c:2698 ___sys_sendmsg+0x190/0x1e0 net/socket.c:2752 __sys_sendmsg+0x170/0x220 net/socket.c:2784 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x10b/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f1305f9c819 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:00007f1306d97028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f1306216090 RCX: 00007f1305f9c819 RDX: 0000000000000000 RSI: 00002000000002c0 RDI: 0000000000000003 RBP: 00007f1306032c91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f1306216128 R14: 00007f1306216090 R15: 00007ffd8ecad288 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:kernel_sock_shutdown+0x47/0x70 net/socket.c:3785 Code: fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 33 48 b8 00 00 00 00 00 fc ff df 4c 8b 63 20 49 8d 7c 24 68 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 1a 49 8b 44 24 68 89 ee 48 89 df 5b 5d 41 5c e9 46 RSP: 0018:ffffc9000566f180 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffff888058587240 RCX: 0000000000000000 RDX: 000000000000000d RSI: ffffffff895ced12 RDI: 0000000000000068 RBP: 0000000000000002 R08: 0000000000000001 R09: ffffed1006d98945 R10: ffff888036cc4a2b R11: 0000003683c25c00 R12: 0000000000000000 R13: ffff88805c998000 R14: 0000000000000002 R15: 0000000000000018 FS: 00007f1306d976c0(0000) GS:ffff8880d64db000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000317000 CR3: 00000000404f1000 CR4: 0000000000352ef0 DR0: ffffffffffffffff DR1: 00000000000001f8 DR2: 0000000000000002 DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: fc cld 1: ff lcall (bad) 2: df 48 89 fisttps -0x77(%rax) 5: fa cli 6: 48 c1 ea 03 shr $0x3,%rdx a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) e: 75 33 jne 0x43 10: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 17: fc ff df 1a: 4c 8b 63 20 mov 0x20(%rbx),%r12 1e: 49 8d 7c 24 68 lea 0x68(%r12),%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: 75 1a jne 0x4a 30: 49 8b 44 24 68 mov 0x68(%r12),%rax 35: 89 ee mov %ebp,%esi 37: 48 89 df mov %rbx,%rdi 3a: 5b pop %rbx 3b: 5d pop %rbp 3c: 41 5c pop %r12 3e: e9 .byte 0xe9 3f: 46 rex.RX