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: 11110 Comm: syz-executor0 Not tainted 4.19.0-rc3-next-20180912+ #72
kobject: 'kvm' (00000000056e89f7): kobject_uevent_env
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:mqueue_get_tree+0xdd/0x2e0 ipc/mqueue.c:362
Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 e3 01 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 6d 08 49 8d 7d 68 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 b6 01 00 00 4d 8b 6d 68 4d 85 ed 74 11 e8 1b 44
kobject: 'kvm' (00000000056e89f7): fill_kobj_path: path = '/devices/virtual/misc/kvm'
RSP: 0018:ffff88015f557928 EFLAGS: 00010a02
RAX: dffffc0000000000 RBX: ffff8801cc08b340 RCX: ffffc90002051000
RDX: 1bd5a9d5a000000d RSI: ffffffff833deb15 RDI: dead4ead00000068
RBP: ffff88015f557948 R08: fffffbfff13555fd R09: fffffbfff13555fc
R10: fffffbfff13555fc R11: ffffffff89aaafe3 R12: ffff8801cb399dc0
R13: dead4ead00000000 R14: ffff8801cc08b3d8 R15: ffff8801cc08b3d8
FS:  00007f0b6924e700(0000) GS:ffff8801dad00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0b6924ddb8 CR3: 00000001d2163000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 vfs_get_tree+0x1cb/0x5c0 fs/super.c:1787
 mq_create_mount+0xe3/0x190 ipc/mqueue.c:415
 mq_init_ns+0x15a/0x210 ipc/mqueue.c:1621
 create_ipc_ns ipc/namespace.c:58 [inline]
 copy_ipcs+0x3d2/0x580 ipc/namespace.c:84
 create_new_namespaces+0x376/0x900 kernel/nsproxy.c:87
 unshare_nsproxy_namespaces+0xc3/0x1f0 kernel/nsproxy.c:206
 ksys_unshare+0x79c/0x10b0 kernel/fork.c:2535
 __do_sys_unshare kernel/fork.c:2603 [inline]
 __se_sys_unshare kernel/fork.c:2601 [inline]
 __x64_sys_unshare+0x31/0x40 kernel/fork.c:2601
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4572d9
Code: fd b4 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 b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f0b6924dc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 00007f0b6924e6d4 RCX: 00000000004572d9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000008020000
RBP: 0000000000930140 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004d7c40 R14: 00000000004caa82 R15: 0000000000000001
Modules linked in:
---[ end trace 246b3070a8194121 ]---
RIP: 0010:mqueue_get_tree+0xdd/0x2e0 ipc/mqueue.c:362
Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 e3 01 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 6d 08 49 8d 7d 68 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 b6 01 00 00 4d 8b 6d 68 4d 85 ed 74 11 e8 1b 44
RSP: 0018:ffff88015f557928 EFLAGS: 00010a02
RAX: dffffc0000000000 RBX: ffff8801cc08b340 RCX: ffffc90002051000
RDX: 1bd5a9d5a000000d RSI: ffffffff833deb15 RDI: dead4ead00000068
RBP: ffff88015f557948 R08: fffffbfff13555fd R09: fffffbfff13555fc
R10: fffffbfff13555fc R11: ffffffff89aaafe3 R12: ffff8801cb399dc0
kobject: 'loop4' (00000000e67a5d7f): kobject_uevent_env
R13: dead4ead00000000 R14: ffff8801cc08b3d8 R15: ffff8801cc08b3d8
FS:  00007f0b6924e700(0000) GS:ffff8801dad00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
kobject: 'loop4' (00000000e67a5d7f): fill_kobj_path: path = '/devices/virtual/block/loop4'
CR2: 00007f0b6924ddb8 CR3: 00000001d2163000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400