IPVS: ftp: loaded support on port[0] = 21 general protection fault, probably for non-canonical address 0xdffffc0000000080: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000400-0x0000000000000407] CPU: 0 PID: 20100 Comm: syz-executor.1 Not tainted 5.8.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:netif_free_tx_queues net/core/dev.c:9357 [inline] RIP: 0010:free_netdev+0x41/0x480 net/core/dev.c:10028 Code: d2 be 2b 27 00 00 48 c7 c7 e0 ca fd 88 e8 17 18 1c fb 48 8d bd 00 04 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 f4 03 00 00 48 8b bd 00 04 00 00 e8 39 93 69 fb RSP: 0018:ffffc90016d77930 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffff88804ff92000 RCX: ffffc90004281000 RDX: 0000000000000080 RSI: ffffffff89bc1100 RDI: 0000000000000400 RBP: 0000000000000000 R08: 0000000000000001 R09: ffffffff8a7b8ac7 R10: 0000000000000000 R11: 0000000000000000 R12: 00000000fffffff4 R13: ffff888096ec9410 R14: ffff8880876db800 R15: ffff88804972d478 FS: 00007fbc47677700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005581b6de1ad0 CR3: 0000000055b10000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ip6gre_init_net+0x546/0x610 net/ipv6/ip6_gre.c:1595 ops_init+0xaf/0x470 net/core/net_namespace.c:151 setup_net+0x2d8/0x850 net/core/net_namespace.c:341 copy_net_ns+0x2cf/0x5e0 net/core/net_namespace.c:482 create_new_namespaces+0x3f6/0xb10 kernel/nsproxy.c:110 copy_namespaces+0x385/0x470 kernel/nsproxy.c:179 copy_process+0x2b0b/0x6d90 kernel/fork.c:2101 _do_fork+0x12c/0xa70 kernel/fork.c:2443 __do_sys_clone+0xef/0x150 kernel/fork.c:2599 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:384 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45c369 Code: Bad RIP value. RSP: 002b:00007fbc47676c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 0000000000001f00 RCX: 000000000045c369 RDX: 9999999999999999 RSI: 0000000000000000 RDI: 00000000e1004d7c RBP: 000000000078bf50 R08: ffffffffffffffff R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000078bf0c R13: 0000000000c9fb6f R14: 00007fbc476779c0 R15: 000000000078bf0c Modules linked in: ---[ end trace 65866575cbbc557b ]--- RIP: 0010:netif_free_tx_queues net/core/dev.c:9357 [inline] RIP: 0010:free_netdev+0x41/0x480 net/core/dev.c:10028 Code: d2 be 2b 27 00 00 48 c7 c7 e0 ca fd 88 e8 17 18 1c fb 48 8d bd 00 04 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 f4 03 00 00 48 8b bd 00 04 00 00 e8 39 93 69 fb RSP: 0018:ffffc90016d77930 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffff88804ff92000 RCX: ffffc90004281000 RDX: 0000000000000080 RSI: ffffffff89bc1100 RDI: 0000000000000400 RBP: 0000000000000000 R08: 0000000000000001 R09: ffffffff8a7b8ac7 R10: 0000000000000000 R11: 0000000000000000 R12: 00000000fffffff4 R13: ffff888096ec9410 R14: ffff8880876db800 R15: ffff88804972d478 FS: 00007fbc47677700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f56bc8bc000 CR3: 0000000055b10000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400