kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] SMP KASAN
CPU: 0 PID: 28464 Comm: syz-executor5 Not tainted 4.17.0+ #86
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:open_fs_devices+0x7e8/0xc60 fs/btrfs/volumes.c:1124
Code: 48 8b 85 e0 fe ff ff 41 c7 87 14 01 00 00 01 00 00 00 48 8d b8 a0 00 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 01 04 00 00 48 8b 85 e0 fe ff ff 49 8d 7f 50 48 
RSP: 0018:ffff8801acaa71d8 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 0000000000000001 RCX: ffffc90001a6e000
RDX: 0000000000000014 RSI: ffffffff82c386bd RDI: 00000000000000a0
RBP: ffff8801acaa7348 R08: ffff88017cb443c0 R09: ffffed003668b148
R10: ffffed003668b148 R11: ffff8801b3458a43 R12: ffff88017acb4118
R13: ffff8801acaa72a0 R14: dffffc0000000000 R15: ffff88017acb4040
FS:  00007f6193e70700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fed7be95db8 CR3: 00000001b425f000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 btrfs_open_devices+0xc0/0xd0 fs/btrfs/volumes.c:1155
 btrfs_mount_root+0x91f/0x1e70 fs/btrfs/super.c:1568
 mount_fs+0xae/0x328 fs/super.c:1277
 vfs_kern_mount.part.34+0xd4/0x4d0 fs/namespace.c:1037
 vfs_kern_mount+0x40/0x60 fs/namespace.c:1027
 btrfs_mount+0x4a1/0x213e fs/btrfs/super.c:1661
 mount_fs+0xae/0x328 fs/super.c:1277
 vfs_kern_mount.part.34+0xd4/0x4d0 fs/namespace.c:1037
 vfs_kern_mount fs/namespace.c:1027 [inline]
 do_new_mount fs/namespace.c:2518 [inline]
 do_mount+0x564/0x30b0 fs/namespace.c:2848
 ksys_mount+0x12d/0x140 fs/namespace.c:3064
 __do_sys_mount fs/namespace.c:3078 [inline]
 __se_sys_mount fs/namespace.c:3075 [inline]
 __x64_sys_mount+0xbe/0x150 fs/namespace.c:3075
 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45843a
Code: b8 a6 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 dd 8f fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 ba 8f fb ff c3 66 0f 1f 84 00 00 00 00 00 
RSP: 002b:00007f6193e6fba8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000020000080 RCX: 000000000045843a
RDX: 0000000020000080 RSI: 0000000020000100 RDI: 00007f6193e6fbf0
RBP: 0000000000000001 R08: 0000000020000240 R09: 0000000020000080
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000014
R13: 0000000000000001 R14: 0000000000700008 R15: 0000000000000000
Modules linked in:
Dumping ftrace buffer:
   (ftrace buffer empty)
---[ end trace 13bccf82ebf0ed6e ]---
RIP: 0010:open_fs_devices+0x7e8/0xc60 fs/btrfs/volumes.c:1124
Code: 48 8b 85 e0 fe ff ff 41 c7 87 14 01 00 00 01 00 00 00 48 8d b8 a0 00 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 01 04 00 00 48 8b 85 e0 fe ff ff 49 8d 7f 50 48 
RSP: 0018:ffff8801acaa71d8 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 0000000000000001 RCX: ffffc90001a6e000
RDX: 0000000000000014 RSI: ffffffff82c386bd RDI: 00000000000000a0
RBP: ffff8801acaa7348 R08: ffff88017cb443c0 R09: ffffed003668b148
R10: ffffed003668b148 R11: ffff8801b3458a43 R12: ffff88017acb4118
R13: ffff8801acaa72a0 R14: dffffc0000000000 R15: ffff88017acb4040
FS:  00007f6193e70700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fed7be95db8 CR3: 00000001b425f000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400