general protection fault in __vxlan_dev_create

[syzbot]

Hello,

syzbot found the following crash on:

HEAD commit: b3a99fd3 Linux 4.19.129
git tree: linux-4.19.y
console output: https://syzkaller.appspot.com/x/log.txt?x=12266d0d100000
kernel config: https://syzkaller.appspot.com/x/.config?x=afe60417c22a7f7a
dashboard link: https://syzkaller.appspot.com/bug?extid=156b1f82cf1a810f216a
compiler: gcc (GCC) 10.1.0-syz 20200507

Unfortunately, I don't have any reproducer for this crash yet.

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+156b1f...@syzkaller.appspotmail.com

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: 1 PID: 22793 Comm: syz-executor.0 Not tainted 4.19.129-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__write_once_size include/linux/compiler.h:220 [inline]
RIP: 0010:__hlist_del include/linux/list.h:679 [inline]
RIP: 0010:hlist_del_rcu include/linux/rculist.h:457 [inline]
RIP: 0010:vxlan_fdb_destroy drivers/net/vxlan.c:788 [inline]
RIP: 0010:__vxlan_dev_create+0x6cb/0xad0 drivers/net/vxlan.c:3270
Code: 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 6a 03 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 75 08 4c 89 f2 48 c1 ea 03 <80> 3c 02 00 0f 85 3e 03 00 00 49 89 2e 4d 8d 7d 10 48 85 ed 0f 84
RSP: 0018:ffff888049246db8 EFLAGS: 00010a02
RAX: dffffc0000000000 RBX: 1ffff11009248db9 RCX: ffffc90005ccf000
RDX: 1bd5a00000000040 RSI: ffffffff84649c09 RDI: ffff88809aa88288
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000000 R12: 00000000fffffff0
R13: ffff88809aa88280 R14: dead000000000200 R15: ffff8880a4dd4fc0
FS: 00007f24ff3d3700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000401ca0 CR3: 000000004e90d000 CR4: 00000000001406e0
DR0: 0000000000000007 DR1: 0000000000000007 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
vxlan_newlink+0xc0/0x120 drivers/net/vxlan.c:3497
rtnl_newlink+0x1027/0x15a0 net/core/rtnetlink.c:3141
rtnetlink_rcv_msg+0x453/0xb80 net/core/rtnetlink.c:4777
netlink_rcv_skb+0x160/0x440 net/netlink/af_netlink.c:2455
netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
netlink_unicast+0x4d5/0x690 net/netlink/af_netlink.c:1344
netlink_sendmsg+0x6bb/0xc40 net/netlink/af_netlink.c:1909
sock_sendmsg_nosec net/socket.c:622 [inline]
sock_sendmsg+0xc3/0x120 net/socket.c:632
sock_no_sendpage+0xf5/0x140 net/core/sock.c:2645
kernel_sendpage net/socket.c:3378 [inline]
sock_sendpage+0xdf/0x140 net/socket.c:847
pipe_to_sendpage+0x268/0x330 fs/splice.c:452
splice_from_pipe_feed fs/splice.c:503 [inline]
__splice_from_pipe+0x389/0x800 fs/splice.c:627
splice_from_pipe fs/splice.c:662 [inline]
generic_splice_sendpage+0xd4/0x140 fs/splice.c:833
do_splice_from fs/splice.c:852 [inline]
do_splice fs/splice.c:1154 [inline]
__do_sys_splice fs/splice.c:1428 [inline]
__se_sys_splice+0xfe7/0x16d0 fs/splice.c:1408
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45ca59
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:00007f24ff3d2c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000113
RAX: ffffffffffffffda RBX: 00000000005086e0 RCX: 000000000045ca59
RDX: 0000000000000005 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 000000000078bfa0 R08: 000000000004ffe2 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000bd1 R14: 00000000004cece6 R15: 00007f24ff3d36d4
Modules linked in:
---[ end trace d8c5ba1803a83c59 ]---
RIP: 0010:__write_once_size include/linux/compiler.h:220 [inline]
RIP: 0010:__hlist_del include/linux/list.h:679 [inline]
RIP: 0010:hlist_del_rcu include/linux/rculist.h:457 [inline]
RIP: 0010:vxlan_fdb_destroy drivers/net/vxlan.c:788 [inline]
RIP: 0010:__vxlan_dev_create+0x6cb/0xad0 drivers/net/vxlan.c:3270
Code: 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 6a 03 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 75 08 4c 89 f2 48 c1 ea 03 <80> 3c 02 00 0f 85 3e 03 00 00 49 89 2e 4d 8d 7d 10 48 85 ed 0f 84
RSP: 0018:ffff888049246db8 EFLAGS: 00010a02
RAX: dffffc0000000000 RBX: 1ffff11009248db9 RCX: ffffc90005ccf000
RDX: 1bd5a00000000040 RSI: ffffffff84649c09 RDI: ffff88809aa88288
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000000 R12: 00000000fffffff0
R13: ffff88809aa88280 R14: dead000000000200 R15: ffff8880a4dd4fc0
FS: 00007f24ff3d3700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002060057f CR3: 000000004e90d000 CR4: 00000000001406e0
DR0: 0000000000000007 DR1: 0000000000000007 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600


---
This bug is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.

syzbot will keep track of this bug report. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.

[syzbot]

syzbot has found a reproducer for the following crash on:

HEAD commit: dce0f886 Linux 4.19.132
git tree: linux-4.19.y
console output: https://syzkaller.appspot.com/x/log.txt?x=170f2577100000
kernel config: https://syzkaller.appspot.com/x/.config?x=ea24367973479f36

dashboard link: https://syzkaller.appspot.com/bug?extid=156b1f82cf1a810f216a
compiler: gcc (GCC) 10.1.0-syz 20200507

syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16135f33100000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10bde95d100000

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+156b1f...@syzkaller.appspotmail.com

audit: type=1400 audit(1594669936.700:8): avc: denied { execmem } for pid=6459 comm="syz-executor345" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1
netlink: 24 bytes leftover after parsing attributes in process `syz-executor345'.

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: 1 PID: 6474 Comm: syz-executor345 Not tainted 4.19.132-syzkaller #0

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__write_once_size include/linux/compiler.h:220 [inline]
RIP: 0010:__hlist_del include/linux/list.h:679 [inline]
RIP: 0010:hlist_del_rcu include/linux/rculist.h:457 [inline]
RIP: 0010:vxlan_fdb_destroy drivers/net/vxlan.c:788 [inline]
RIP: 0010:__vxlan_dev_create+0x6cb/0xad0 drivers/net/vxlan.c:3270
Code: 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 6a 03 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 75 08 4c 89 f2 48 c1 ea 03 <80> 3c 02 00 0f 85 3e 03 00 00 49 89 2e 4d 8d 7d 10 48 85 ed 0f 84

RSP: 0018:ffff888089ff6db8 EFLAGS: 00010a02
RAX: dffffc0000000000 RBX: 1ffff110113fedb9 RCX: ffffffff8464b02f
RDX: 1bd5a00000000040 RSI: ffffffff8464b219 RDI: ffff88808aec2188

RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000000 R12: 00000000fffffff0

R13: ffff88808aec2180 R14: dead000000000200 R15: ffff8880a74716c0
FS: 00007f4041d76700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000

CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033

CR2: 0000559a3b8d0920 CR3: 0000000090215000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Call Trace:
vxlan_newlink+0xc0/0x120 drivers/net/vxlan.c:3497
rtnl_newlink+0x1027/0x15a0 net/core/rtnetlink.c:3141
rtnetlink_rcv_msg+0x453/0xb80 net/core/rtnetlink.c:4777
netlink_rcv_skb+0x160/0x440 net/netlink/af_netlink.c:2455
netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
netlink_unicast+0x4d5/0x690 net/netlink/af_netlink.c:1344
netlink_sendmsg+0x6bb/0xc40 net/netlink/af_netlink.c:1909
sock_sendmsg_nosec net/socket.c:622 [inline]
sock_sendmsg+0xc3/0x120 net/socket.c:632

sock_no_sendpage+0xf5/0x140 net/core/sock.c:2647

kernel_sendpage net/socket.c:3378 [inline]
sock_sendpage+0xdf/0x140 net/socket.c:847
pipe_to_sendpage+0x268/0x330 fs/splice.c:452
splice_from_pipe_feed fs/splice.c:503 [inline]
__splice_from_pipe+0x389/0x800 fs/splice.c:627
splice_from_pipe fs/splice.c:662 [inline]
generic_splice_sendpage+0xd4/0x140 fs/splice.c:833
do_splice_from fs/splice.c:852 [inline]
do_splice fs/splice.c:1154 [inline]
__do_sys_splice fs/splice.c:1428 [inline]
__se_sys_splice+0xfe7/0x16d0 fs/splice.c:1408
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe

RIP: 0033:0x445b59
Code: e8 bc b7 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 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 ab 11 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f4041d75d88 EFLAGS: 00000246 ORIG_RAX: 0000000000000113
RAX: ffffffffffffffda RBX: 00000000006dac58 RCX: 0000000000445b59
RDX: 0000000000000006 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 00000000006dac50 R08: 000000000004ffe2 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dac5c
R13: 000000000000525a R14: 0000000000000000 R15: 0705001000000048
Modules linked in:
---[ end trace bf97bbdc364257ee ]---

RIP: 0010:__write_once_size include/linux/compiler.h:220 [inline]
RIP: 0010:__hlist_del include/linux/list.h:679 [inline]
RIP: 0010:hlist_del_rcu include/linux/rculist.h:457 [inline]
RIP: 0010:vxlan_fdb_destroy drivers/net/vxlan.c:788 [inline]
RIP: 0010:__vxlan_dev_create+0x6cb/0xad0 drivers/net/vxlan.c:3270
Code: 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 6a 03 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 75 08 4c 89 f2 48 c1 ea 03 <80> 3c 02 00 0f 85 3e 03 00 00 49 89 2e 4d 8d 7d 10 48 85 ed 0f 84

RSP: 0018:ffff888089ff6db8 EFLAGS: 00010a02
RAX: dffffc0000000000 RBX: 1ffff110113fedb9 RCX: ffffffff8464b02f
RDX: 1bd5a00000000040 RSI: ffffffff8464b219 RDI: ffff88808aec2188

RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000000 R12: 00000000fffffff0

R13: ffff88808aec2180 R14: dead000000000200 R15: ffff8880a74716c0
FS: 00007f4041d76700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000

CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033

CR2: 00007f088b775740 CR3: 0000000090215000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 69b94dd6 Linux 4.14.189
git tree: linux-4.14.y
console output: https://syzkaller.appspot.com/x/log.txt?x=1672aad8900000
kernel config: https://syzkaller.appspot.com/x/.config?x=80d63ff414fa81b0
dashboard link: https://syzkaller.appspot.com/bug?extid=9068a12c7c348a940af2

compiler: gcc (GCC) 10.1.0-syz 20200507

Unfortunately, I don't have any reproducer for this issue yet.

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+9068a1...@syzkaller.appspotmail.com

kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN

Modules linked in:
CPU: 0 PID: 10880 Comm: syz-executor.2 Not tainted 4.14.189-syzkaller #0

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011

task: ffff8881e07de680 task.stack: ffff888208330000
RIP: 0010:__write_once_size include/linux/compiler.h:210 [inline]

RIP: 0010:__hlist_del include/linux/list.h:679 [inline]

RIP: 0010:hlist_del_rcu include/linux/rculist.h:427 [inline]
RIP: 0010:vxlan_fdb_destroy drivers/net/vxlan.c:787 [inline]
RIP: 0010:__vxlan_dev_create+0x5d6/0x970 drivers/net/vxlan.c:3274
RSP: 0018:ffff888208337178 EFLAGS: 00010a02
RAX: dffffc0000000000 RBX: 1ffff11041066e31 RCX: ffffc9000af24000
RDX: 1bd5a00000000040 RSI: ffffffff83e95344 RDI: ffff88808bf2b508
RBP: 0000000000000000 R08: ffffffff8a06dfa0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 00000000fffffff0
R13: ffff88808bf2b500 R14: dead000000000200 R15: ffff88808ec92800
FS: 00007fe4036bf700(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000

CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033

CR2: 0000001b31829000 CR3: 00000001ef3fc000 CR4: 00000000001426f0

DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:

vxlan_newlink+0xa3/0xe0 drivers/net/vxlan.c:3495
rtnl_newlink+0xf88/0x1810 net/core/rtnetlink.c:2728
rtnetlink_rcv_msg+0x3be/0xb10 net/core/rtnetlink.c:4315
netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2433
netlink_unicast_kernel net/netlink/af_netlink.c:1287 [inline]
netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1313
netlink_sendmsg+0x62e/0xb80 net/netlink/af_netlink.c:1878
sock_sendmsg_nosec net/socket.c:646 [inline]
sock_sendmsg+0xb5/0x100 net/socket.c:656
sock_no_sendpage+0xe2/0x110 net/core/sock.c:2574
kernel_sendpage net/socket.c:3407 [inline]
sock_sendpage+0xdf/0x140 net/socket.c:871
pipe_to_sendpage+0x226/0x2d0 fs/splice.c:451
splice_from_pipe_feed fs/splice.c:502 [inline]
__splice_from_pipe+0x326/0x7a0 fs/splice.c:626
splice_from_pipe fs/splice.c:661 [inline]
generic_splice_sendpage+0xc1/0x110 fs/splice.c:832
do_splice_from fs/splice.c:851 [inline]
do_splice fs/splice.c:1147 [inline]
SYSC_splice fs/splice.c:1402 [inline]
SyS_splice+0xd59/0x1380 fs/splice.c:1382
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x45c1f9
RSP: 002b:00007fe4036bec78 EFLAGS: 00000246 ORIG_RAX: 0000000000000113
RAX: ffffffffffffffda RBX: 00000000000320c0 RCX: 000000000045c1f9
RDX: 000000000000000a RSI: 0000000000000000 RDI: 0000000000000004
RBP: 000000000078bff8 R08: 000000008ffffffc R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000078bfac
R13: 00007ffc2f11fb1f R14: 00007fe4036bf9c0 R15: 000000000078bfac
Code: 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 09 03 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 75 08 4c 89 f2 48 c1 ea 03 <80> 3c 02 00 0f 85 dd 02 00 00 49 89 2e 4d 8d 7d 10 48 85 ed 0f
RIP: __write_once_size include/linux/compiler.h:210 [inline] RSP: ffff888208337178
RIP: __hlist_del include/linux/list.h:679 [inline] RSP: ffff888208337178
RIP: hlist_del_rcu include/linux/rculist.h:427 [inline] RSP: ffff888208337178
RIP: vxlan_fdb_destroy drivers/net/vxlan.c:787 [inline] RSP: ffff888208337178
RIP: __vxlan_dev_create+0x5d6/0x970 drivers/net/vxlan.c:3274 RSP: ffff888208337178
---[ end trace 54af3481f230884c ]---


---
This report is generated by a bot. It may contain errors.

See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.

syzbot will keep track of this issue. See:

[syzbot]

syzbot has found a reproducer for the following issue on:

HEAD commit: 69b94dd6 Linux 4.14.189
git tree: linux-4.14.y

console output: https://syzkaller.appspot.com/x/log.txt?x=15c83f5f100000

kernel config: https://syzkaller.appspot.com/x/.config?x=80d63ff414fa81b0
dashboard link: https://syzkaller.appspot.com/bug?extid=9068a12c7c348a940af2
compiler: gcc (GCC) 10.1.0-syz 20200507

syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1733d9a0900000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12d28964900000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+9068a1...@syzkaller.appspotmail.com

audit: type=1400 audit(1595571743.201:8): avc: denied { execmem } for pid=6341 comm="syz-executor300" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1
netlink: 24 bytes leftover after parsing attributes in process `syz-executor300'.
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
Modules linked in:

CPU: 1 PID: 6359 Comm: syz-executor300 Not tainted 4.14.189-syzkaller #0

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011

task: ffff88809b3fc180 task.stack: ffff888097ed8000

RIP: 0010:__write_once_size include/linux/compiler.h:210 [inline]
RIP: 0010:__hlist_del include/linux/list.h:679 [inline]
RIP: 0010:hlist_del_rcu include/linux/rculist.h:427 [inline]
RIP: 0010:vxlan_fdb_destroy drivers/net/vxlan.c:787 [inline]
RIP: 0010:__vxlan_dev_create+0x5d6/0x970 drivers/net/vxlan.c:3274

RSP: 0018:ffff888097edf178 EFLAGS: 00010a02
RAX: dffffc0000000000 RBX: 1ffff11012fdbe31 RCX: 1ffff11012fdbe20
RDX: 1bd5a00000000040 RSI: ffff88809b3fca30 RDI: ffff8880a7dab888
RBP: 0000000000000000 R08: ffffffff8a0979f8 R09: 0000000000000000

R10: 0000000000000000 R11: 0000000000000000 R12: 00000000fffffff0

R13: ffff8880a7dab880 R14: dead000000000200 R15: ffff88808605a200
FS: 00007efce5dca700(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000

CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033

CR2: 00007efce5dc9db8 CR3: 00000000a117c000 CR4: 00000000001406e0

RIP: 0033:0x44a179
RSP: 002b:00007efce5dc9cd8 EFLAGS: 00000246 ORIG_RAX: 0000000000000113
RAX: ffffffffffffffda RBX: 00000000006dbc58 RCX: 000000000044a179
RDX: 0000000000000008 RSI: 0000000000000000 RDI: 0000000000000006
RBP: 00000000006dbc50 R08: 000000000004ffe2 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc5c
R13: 00007ffff019aadf R14: 00007efce5dca9c0 R15: 20c49ba5e353f7cf

Code: 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 09 03 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 75 08 4c 89 f2 48 c1 ea 03 <80> 3c 02 00 0f 85 dd 02 00 00 49 89 2e 4d 8d 7d 10 48 85 ed 0f

RIP: __write_once_size include/linux/compiler.h:210 [inline] RSP: ffff888097edf178
RIP: __hlist_del include/linux/list.h:679 [inline] RSP: ffff888097edf178
RIP: hlist_del_rcu include/linux/rculist.h:427 [inline] RSP: ffff888097edf178
RIP: vxlan_fdb_destroy drivers/net/vxlan.c:787 [inline] RSP: ffff888097edf178
RIP: __vxlan_dev_create+0x5d6/0x970 drivers/net/vxlan.c:3274 RSP: ffff888097edf178
---[ end trace a21bf13a87774a16 ]---