IPVS: ftp: loaded support on port[0] = 21
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 20640 Comm: syz-executor.0 Not tainted 4.19.131-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:8568 [inline]
RIP: 0010:free_netdev+0x41/0x410 net/core/dev.c:9227
Code: d2 be 0a 24 00 00 48 c7 c7 80 2d 2a 88 e8 57 aa 92 fb 48 8d bb 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 86 03 00 00 48 8b bb 00 04 00 00 e8 49 e0 d8 fb
RSP: 0018:ffff8880928ef9b8 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000001
RDX: 0000000000000080 RSI: 00000000ffffffff RDI: 0000000000000400
RBP: ffff88808ba06b40 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000000 R12: 00000000fffffff4
R13: ffff88808ba06f50 R14: ffff888096a16040 R15: ffff8880a8996c48
FS:  00007f1b1054b700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2cc31000 CR3: 00000000826bc000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 ip6gre_init_net+0x54b/0x620 net/ipv6/ip6_gre.c:1613
 ops_init+0xb3/0x410 net/core/net_namespace.c:129
 setup_net+0x2c2/0x720 net/core/net_namespace.c:315
 copy_net_ns+0x1f7/0x335 net/core/net_namespace.c:438
 create_new_namespaces+0x3f6/0x7b0 kernel/nsproxy.c:107
 copy_namespaces+0x325/0x3c0 kernel/nsproxy.c:165
 copy_process.part.0+0x3e13/0x7f40 kernel/fork.c:1900
 copy_process kernel/fork.c:1694 [inline]
 _do_fork+0x22f/0xf30 kernel/fork.c:2207
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45cb29
Code: 0d b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 db b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f1b1054ac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00000000004db560 RCX: 000000000045cb29
RDX: 9999999999999999 RSI: 0000000000000000 RDI: 0c75e43cfae22dd4
RBP: 000000000078bf00 R08: ffffffffffffffff R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 000000000000007c R14: 00000000004c34ba R15: 00007f1b1054b6d4
Modules linked in:
IPVS: ftp: loaded support on port[0] = 21
IPVS: ftp: loaded support on port[0] = 21
IPVS: ftp: loaded support on port[0] = 21
---[ end trace 43481fc8cdeb0b28 ]---
RIP: 0010:netif_free_tx_queues net/core/dev.c:8568 [inline]
RIP: 0010:free_netdev+0x41/0x410 net/core/dev.c:9227
Code: d2 be 0a 24 00 00 48 c7 c7 80 2d 2a 88 e8 57 aa 92 fb 48 8d bb 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 86 03 00 00 48 8b bb 00 04 00 00 e8 49 e0 d8 fb
RSP: 0018:ffff8880928ef9b8 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000001
RDX: 0000000000000080 RSI: 00000000ffffffff RDI: 0000000000000400
RBP: ffff88808ba06b40 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000000 R12: 00000000fffffff4
R13: ffff88808ba06f50 R14: ffff888096a16040 R15: ffff8880a8996c48
FS:  00007f1b1054b700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fdb53ff6000 CR3: 00000000826bc000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400