IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready
BUG: unable to handle kernel NULL pointer dereference at 0000000000000000
kobject: 'loop2' (000000006ec3ab40): kobject_uevent_env
PGD 1b9a4f067 P4D 1b9a4f067 PUD 1c9e3f067 PMD 0 
Oops: 0010 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 5243 Comm: syz-executor3 Not tainted 4.20.0-rc5+ #265
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
kobject: 'loop2' (000000006ec3ab40): fill_kobj_path: path = '/devices/virtual/block/loop2'
RIP: 0010:          (null)
Code: Bad RIP value.
RSP: 0018:ffff8881daf07868 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff862fd814
kobject: 'tx-3' (00000000a8774c2e): kobject_add_internal: parent: 'queues', set: 'queues'
RDX: 0000000000000100 RSI: 0000000000000000 RDI: ffff88818d7a1058
RBP: ffff8881daf07df8 R08: ffff8881bd61c400 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001
R13: dffffc0000000000 R14: ffff8881daf07dd0 R15: ffff88818d7a1058
FS:  0000000000000000(0000) GS:ffff8881daf00000(0063) knlGS:00000000f5f84b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001c6423000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
kobject: 'tx-3' (00000000a8774c2e): kobject_uevent_env
 __do_softirq+0x308/0xb7e kernel/softirq.c:292
kobject: 'tx-3' (00000000a8774c2e): fill_kobj_path: path = '/devices/virtual/net/vet/queues/tx-3'
 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1023
 </IRQ>
 do_softirq.part.14+0x126/0x160 kernel/softirq.c:337
 do_softirq kernel/softirq.c:329 [inline]
 __local_bh_enable_ip+0x21d/0x260 kernel/softirq.c:189
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 tun_get_user+0x1c0b/0x4250 drivers/net/tun.c:1967
kobject: 'rx-3' (000000006dbd7f98): kobject_add_internal: parent: 'queues', set: 'queues'
kobject: 'rx-3' (000000006dbd7f98): kobject_uevent_env
kobject: 'rx-3' (000000006dbd7f98): fill_kobj_path: path = '/devices/virtual/net/vet/queues/rx-3'
 tun_chr_write_iter+0xb9/0x160 drivers/net/tun.c:1997
 call_write_iter include/linux/fs.h:1857 [inline]
 new_sync_write fs/read_write.c:474 [inline]
 __vfs_write+0x6b8/0x9f0 fs/read_write.c:487
 vfs_write+0x1fc/0x560 fs/read_write.c:549
 ksys_write+0x101/0x260 fs/read_write.c:598
 __do_sys_write fs/read_write.c:610 [inline]
 __se_sys_write fs/read_write.c:607 [inline]
 __ia32_sys_write+0x71/0xb0 fs/read_write.c:607
 do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline]
 do_fast_syscall_32+0x34d/0xfb2 arch/x86/entry/common.c:397
IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready
 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139
RIP: 0023:0xf7fcaa29
Code: 85 d2 74 02 89 0a 5b 5d c3 8b 04 24 c3 8b 14 24 c3 8b 3c 24 c3 90 90 90 90 90 90 90 90 90 90 90 90 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 002b:00000000f5f840cc EFLAGS: 00000296 ORIG_RAX: 0000000000000004
RAX: ffffffffffffffda RBX: 0000000000000007 RCX: 00000000200004c0
RDX: 0000000000000066 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Modules linked in:
CR2: 0000000000000000
---[ end trace ba21464053af9e51 ]---
RIP: 0010:          (null)
Code: Bad RIP value.
kobject: 'loop1' (000000009f11b32a): kobject_uevent_env
RSP: 0018:ffff8881daf07868 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff862fd814
RDX: 0000000000000100 RSI: 0000000000000000 RDI: ffff88818d7a1058
RBP: ffff8881daf07df8 R08: ffff8881bd61c400 R09: 0000000000000000
kobject: 'loop1' (000000009f11b32a): fill_kobj_path: path = '/devices/virtual/block/loop1'
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001
R13: dffffc0000000000 R14: ffff8881daf07dd0 R15: ffff88818d7a1058
FS:  0000000000000000(0000) GS:ffff8881daf00000(0063) knlGS:00000000f5f84b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001c6423000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400