kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 8888 Comm: syz-executor.4 Not tainted 4.19.133-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 c0 8b 2a 88 e8 17 2a 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 39 62 d8 fb
RSP: 0018:ffff888043b5fc28 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000001
RDX: 0000000000000080 RSI: 00000000ffffffff RDI: 0000000000000400
RBP: ffff8880505be9c0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000000 R12: 00000000fffffff4
R13: ffff8880505bedd0 R14: ffff88808de7bb00 R15: ffff888044631f48
FS:  00007facdf4a0700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc900dd358 CR3: 00000000a8901000 CR4: 00000000001426f0
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
 unshare_nsproxy_namespaces+0xbd/0x1f0 kernel/nsproxy.c:206
 ksys_unshare+0x36c/0x9a0 kernel/fork.c:2530
 __do_sys_unshare kernel/fork.c:2598 [inline]
 __se_sys_unshare kernel/fork.c:2596 [inline]
 __x64_sys_unshare+0x2d/0x40 kernel/fork.c:2596
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45c1d9
Code: 8d b6 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 5b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007facdf49fc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 0000000000034280 RCX: 000000000045c1d9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000000
RBP: 000000000078bf30 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000078bf0c
R13: 00007ffd4a815f1f R14: 00007facdf4a09c0 R15: 000000000078bf0c
Modules linked in:
---[ end trace 048cc7e329946268 ]---
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 c0 8b 2a 88 e8 17 2a 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 39 62 d8 fb
can: request_module (can-proto-0) failed.
RSP: 0018:ffff888043b5fc28 EFLAGS: 00010202
base_sock_release(000000001ca3aa9f) sk=00000000f9292433
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000001
base_sock_release(0000000090a7641d) sk=000000008eee3392
can: request_module (can-proto-0) failed.
RDX: 0000000000000080 RSI: 00000000ffffffff RDI: 0000000000000400
base_sock_release(00000000ba6b5e80) sk=000000003bec130f
RBP: ffff8880505be9c0 R08: 0000000000000001 R09: 0000000000000000
base_sock_release(0000000037437229) sk=00000000d14270bf
base_sock_release(0000000092b4b117) sk=00000000569d436f
R10: 0000000000000005 R11: 0000000000000000 R12: 00000000fffffff4
base_sock_release(00000000b8a8d52a) sk=000000004e04d135
R13: ffff8880505bedd0 R14: ffff88808de7bb00 R15: ffff888044631f48
FS:  00007facdf4a0700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007feb43531000 CR3: 00000000a8901000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400