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: 1 PID: 17290 Comm: syz-executor556 Not tainted 5.8.0-rc5-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 c6 fd 88 e8 a7 37 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 59 b0 69 fb RSP: 0018:ffffc900080e7bf8 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffff88809f4ee000 RCX: ffffffff86f9877b RDX: 0000000000000080 RSI: ffffffff89bc1100 RDI: 0000000000000400 RBP: 0000000000000000 R08: 0000000000000001 R09: ffff88809589e5e3 R10: 0000000000000000 R11: 0000000000000000 R12: 00000000fffffff4 R13: ffff8880973c4410 R14: ffff8880a8d4f800 R15: ffff8880985f74f8 FS: 0000000000000000(0000) GS:ffff8880ae700000(0063) knlGS:00000000f7f4fb40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 0000000020000180 CR3: 0000000092424000 CR4: 00000000001406e0 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 unshare_nsproxy_namespaces+0xbd/0x1f0 kernel/nsproxy.c:231 ksys_unshare+0x36c/0x9a0 kernel/fork.c:2983 __do_sys_unshare kernel/fork.c:3051 [inline] __se_sys_unshare kernel/fork.c:3049 [inline] __ia32_sys_unshare+0x2c/0x40 kernel/fork.c:3049 do_syscall_32_irqs_on+0x3f/0x60 arch/x86/entry/common.c:428 __do_fast_syscall_32 arch/x86/entry/common.c:475 [inline] do_fast_syscall_32+0x7f/0x120 arch/x86/entry/common.c:503 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c RIP: 0023:0xf7f54569 Code: Bad RIP value. RSP: 002b:00000000f7f4f12c EFLAGS: 00000292 ORIG_RAX: 0000000000000136 RAX: ffffffffffffffda RBX: 0000000040000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace cbca041b1b163dbf ]--- 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 c6 fd 88 e8 a7 37 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 59 b0 69 fb RSP: 0018:ffffc900080e7bf8 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffff88809f4ee000 RCX: ffffffff86f9877b RDX: 0000000000000080 RSI: ffffffff89bc1100 RDI: 0000000000000400 RBP: 0000000000000000 R08: 0000000000000001 R09: ffff88809589e5e3 R10: 0000000000000000 R11: 0000000000000000 R12: 00000000fffffff4 R13: ffff8880973c4410 R14: ffff8880a8d4f800 R15: ffff8880985f74f8 FS: 0000000000000000(0000) GS:ffff8880ae600000(0063) knlGS:00000000f7f4fb40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 0000000020000180 CR3: 0000000092424000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400