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
kobject: 'ip6tnl0' (00000000906e0cd4): kobject_add_internal: parent: 'net', set: 'devices'
CPU: 0 PID: 13352 Comm: syz-executor5 Not tainted 4.20.0-rc4+ #323
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__skb_unlink include/linux/skbuff.h:1914 [inline]
RIP: 0010:skb_unlink+0xc1/0x160 net/core/skbuff.c:2984
Code: 00 00 49 8d 7d 08 4c 8b 63 08 48 ba 00 00 00 00 00 fc ff df 48 c7 43 08 00 00 00 00 48 89 f9 48 c7 03 00 00 00 00 48 c1 e9 03 <80> 3c 11 00 75 5b 4c 89 e1 4d 89 65 08 48 ba 00 00 00 00 00 fc ff
kobject: 'ip6tnl0' (00000000906e0cd4): kobject_uevent_env
RSP: 0018:ffff8881971376f0 EFLAGS: 00010002
kobject: 'ip6tnl0' (00000000906e0cd4): fill_kobj_path: path = '/devices/virtual/net/ip6tnl0'
RAX: 0000000000000282 RBX: ffff8881cf3b5500 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: 0000000000000004 RDI: 0000000000000008
RBP: ffff888197137718 R08: ffffed1032e26ecb R09: ffffed1032e26eca
R10: ffffed1032e26eca R11: 0000000000000003 R12: 0000000000000000
R13: 0000000000000000 R14: ffff88819655da20 R15: ffff888197137ce8
FS:  00007f3815fa9700(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000
kobject: 'queues' (00000000a309e7c0): kobject_add_internal: parent: 'ip6tnl0', set: '<NULL>'
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2f127000 CR3: 00000001d75aa000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 kcm_recvmsg+0x4a6/0x5b0 net/kcm/kcmsock.c:1160
kobject: 'queues' (00000000a309e7c0): kobject_uevent_env
kobject: 'queues' (00000000a309e7c0): kobject_uevent_env: filter function caused the event to drop!
kobject: 'loop3' (000000003a7e144c): kobject_uevent_env
kobject: 'loop3' (000000003a7e144c): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'rx-0' (00000000fda30485): kobject_add_internal: parent: 'queues', set: 'queues'
 sock_recvmsg_nosec net/socket.c:794 [inline]
 sock_recvmsg+0xd0/0x110 net/socket.c:801
kobject: 'loop1' (00000000874ad8a4): kobject_uevent_env
 ___sys_recvmsg+0x2b6/0x680 net/socket.c:2278
kobject: 'loop1' (00000000874ad8a4): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'rx-0' (00000000fda30485): kobject_uevent_env
kobject: 'rx-0' (00000000fda30485): fill_kobj_path: path = '/devices/virtual/net/ip6tnl0/queues/rx-0'
 __sys_recvmmsg+0x303/0xb90 net/socket.c:2390
kobject: 'tx-0' (000000004722c2a5): kobject_add_internal: parent: 'queues', set: 'queues'
kobject: 'tx-0' (000000004722c2a5): kobject_uevent_env
kobject: 'tx-0' (000000004722c2a5): fill_kobj_path: path = '/devices/virtual/net/ip6tnl0/queues/tx-0'
kobject: 'ip6gre0' (00000000b1fd45e7): kobject_add_internal: parent: 'net', set: 'devices'
kobject: 'ip6gre0' (00000000b1fd45e7): kobject_uevent_env
kobject: 'ip6gre0' (00000000b1fd45e7): fill_kobj_path: path = '/devices/virtual/net/ip6gre0'
 do_sys_recvmmsg+0xe3/0x190 net/socket.c:2470
kobject: 'queues' (00000000c1ffd9a3): kobject_add_internal: parent: 'ip6gre0', set: '<NULL>'
 __do_sys_recvmmsg net/socket.c:2482 [inline]
 __se_sys_recvmmsg net/socket.c:2478 [inline]
 __x64_sys_recvmmsg+0xbe/0x150 net/socket.c:2478
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457569
Code: fd b3 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 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f3815fa8c78 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000457569
RDX: 0000000000000007 RSI: 0000000020007d80 RDI: 0000000000000006
RBP: 000000000072bf00 R08: 0000000020004c00 R09: 0000000000000000
R10: 0000000000002100 R11: 0000000000000246 R12: 00007f3815fa96d4
R13: 00000000004c3996 R14: 00000000004d5f20 R15: 00000000ffffffff
Modules linked in:
---[ end trace 1c3e72a0606184dd ]---
RIP: 0010:__skb_unlink include/linux/skbuff.h:1914 [inline]
RIP: 0010:skb_unlink+0xc1/0x160 net/core/skbuff.c:2984
Code: 00 00 49 8d 7d 08 4c 8b 63 08 48 ba 00 00 00 00 00 fc ff df 48 c7 43 08 00 00 00 00 48 89 f9 48 c7 03 00 00 00 00 48 c1 e9 03 <80> 3c 11 00 75 5b 4c 89 e1 4d 89 65 08 48 ba 00 00 00 00 00 fc ff
RSP: 0018:ffff8881971376f0 EFLAGS: 00010002
RAX: 0000000000000282 RBX: ffff8881cf3b5500 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: 0000000000000004 RDI: 0000000000000008
RBP: ffff888197137718 R08: ffffed1032e26ecb R09: ffffed1032e26eca
R10: ffffed1032e26eca R11: 0000000000000003 R12: 0000000000000000
R13: 0000000000000000 R14: ffff88819655da20 R15: ffff888197137ce8
FS:  00007f3815fa9700(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2f127000 CR3: 00000001d75aa000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400