TR:   sel=0x0000, attr=0x0008b, limit=0x0000ffff, base=0x0000000000000000
EFER =     0x0000000000000000  PAT = 0x0007040600070406
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
DebugCtl = 0x0000000000000000  DebugExceptions = 0x0000000000000000
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 20399 Comm: syz-executor.2 Not tainted 4.19.132-syzkaller #0
Interruptibility = 00000000  ActivityState = 00000000
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 85 2a 88 e8 57 3a 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 70 d8 fb
*** Host State ***
RSP: 0018:ffff888048597c28 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000001
RDX: 0000000000000080 RSI: 00000000ffffffff RDI: 0000000000000400
RBP: ffff8880a3ea61c0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000000 R12: 00000000fffffff4
R13: ffff8880a3ea65d0 R14: ffff8880a894c940 R15: ffff88804079e608
FS:  00007f35957a3700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
RIP = 0xffffffff811aff8f  RSP = 0xffff88800e1b78c0
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000073f138 CR3: 000000004f0e8000 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
CS=0010 SS=0018 DS=0000 ES=0000 FS=0000 GS=0000 TR=0040
 ops_init+0xb3/0x410 net/core/net_namespace.c:129
 setup_net+0x2c2/0x720 net/core/net_namespace.c:315
FSBase=00007f70d7faa700 GSBase=ffff8880ae600000 TRBase=fffffe0000034000
 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
GDTBase=fffffe0000032000 IDTBase=fffffe0000000000
CR0=0000000080050033 CR3=000000003ff55000 CR4=00000000001426f0
 __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
Sysenter RSP=fffffe0000033200 CS:RIP=0010:ffffffff874013e0
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45cba9
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:00007f35957a2c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
EFER = 0x0000000000000d01  PAT = 0x0407050600070106
RAX: ffffffffffffffda RBX: 000000000050d7e0 RCX: 000000000045cba9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000044000600
RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000cdb R14: 00000000004cf241 R15: 00007f35957a36d4
*** Control State ***
Modules linked in:
PinBased=0000003f CPUBased=b5a06dfa SecondaryExec=000000e3
EntryControls=0000d1ff ExitControls=002fefff
ExceptionBitmap=00060042 PFECmask=00000000 PFECmatch=00000000
VMEntry: intr_info=80000027 errcode=00000000 ilen=00000000
VMExit: intr_info=00000000 errcode=00000000 ilen=00000000
        reason=80000021 qualification=0000000000000000
IDTVectoring: info=00000000 errcode=00000000
---[ end trace 70fd1340e45ead81 ]---
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 85 2a 88 e8 57 3a 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 70 d8 fb
TSC Offset = 0xfffffaa0b53a032c
RSP: 0018:ffff888048597c28 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000001
TPR Threshold = 0x00
EPT pointer = 0x000000003fd0c01e
RDX: 0000000000000080 RSI: 00000000ffffffff RDI: 0000000000000400
Virtual processor ID = 0x0001
RBP: ffff8880a3ea61c0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000000 R12: 00000000fffffff4
R13: ffff8880a3ea65d0 R14: ffff8880a894c940 R15: ffff88804079e608
FS:  00007f35957a3700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc26df8ac8 CR3: 000000004f0e8000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400