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: 29134 Comm: syz-executor.1 Not tainted 5.8.0-rc3-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 c0 58 fd 88 e8 27 0f 1d 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 a9 77 6a fb
RSP: 0018:ffffc90008367bf8 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff88805a11c000 RCX: ffffffff86f87bbb
RDX: 0000000000000080 RSI: ffffffff89bc10c0 RDI: 0000000000000400
RBP: 0000000000000000 R08: 0000000000000001 R09: ffff8880a3a721a3
R10: 0000000000000000 R11: 0000000000000000 R12: 00000000fffffff4
R13: ffff88806d63b410 R14: ffff8880a32ea000 R15: ffff888063723678
FS:  0000000000000000(0000) GS:ffff8880ae700000(0063) knlGS:00000000f7fc9b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 0000000020000040 CR3: 000000006e40d000 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:403
 __do_fast_syscall_32 arch/x86/entry/common.c:448 [inline]
 do_fast_syscall_32+0x7f/0x120 arch/x86/entry/common.c:474
 entry_SYSENTER_compat+0x6d/0x7c arch/x86/entry/entry_64_compat.S:138
RIP: 0023:0xf7fef569
Code: Bad RIP value.
RSP: 002b:00000000f7fc90cc EFLAGS: 00000296 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 13664b1be8aacfe8 ]---
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 c0 58 fd 88 e8 27 0f 1d 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 a9 77 6a fb
RSP: 0018:ffffc90008367bf8 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff88805a11c000 RCX: ffffffff86f87bbb
RDX: 0000000000000080 RSI: ffffffff89bc10c0 RDI: 0000000000000400
RBP: 0000000000000000 R08: 0000000000000001 R09: ffff8880a3a721a3
R10: 0000000000000000 R11: 0000000000000000 R12: 00000000fffffff4
R13: ffff88806d63b410 R14: ffff8880a32ea000 R15: ffff888063723678
FS:  0000000000000000(0000) GS:ffff8880ae700000(0063) knlGS:00000000f7fc9b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 000000000819b000 CR3: 000000006e40d000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400