BUG: unable to handle kernel NULL pointer dereference at 0000000000000010
IP: [<ffffffffa029ebbb>] decrypt_scatterlist+0x54/0xeb [ecryptfs]
PGD 1b89b067 PUD 1db47067 PMD 0 
Oops: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC
CPU 0 
Modules linked in: ecryptfs cryptd aes_x86_64 aes_generic sha256_generic encrypted ecryptfs_format trusted nfs nfsd lockd nfs_acl auth_rpcgss sunrpc virtio_console virtio_net virtio_balloon ext4 mbcache jbd2 virtio_blk virtio_pci virtio_ring virtio [last unloaded: ecryptfs]

Pid: 10635, comm: python Tainted: G        W   3.0.0+ #27 Bochs Bochs
RIP: 0010:[<ffffffffa029ebbb>]  [<ffffffffa029ebbb>] decrypt_scatterlist+0x54/0xeb [ecryptfs]
RSP: 0018:ffff88001d94daf8  EFLAGS: 00010296
RAX: 0000000000000000 RBX: 0000000000001000 RCX: 0000000000000003
RDX: 0000000000000010 RSI: ffff880003118eb0 RDI: 0000000000000000
RBP: ffff88001d94db48 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffa029ebac R11: ffff880003119030 R12: ffff88001d94db78
R13: ffff880003118e40 R14: ffff880003118fb8 R15: ffff88001d94dba0
FS:  00007f3759ff1720(0000) GS:ffff88003ca00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000010 CR3: 000000001aed0000 CR4: 00000000000006b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process python (pid: 10635, threadinfo ffff88001d94c000, task ffff880003240000)
Stack:
0000000000000000 0000000000000000 ffff88001d94dbc8 0000000000000200
1c464254d604cf97 ffff880003118e40 ffffea0000d2fd88 0000000000000000
0000000000000000 0000000000001000 ffff88001d94dc08 ffffffffa029f3f7
Call Trace:
[<ffffffffa029f3f7>] ecryptfs_decrypt_extent+0x17d/0x23d [ecryptfs]
[<ffffffffa029fc2d>] ecryptfs_decrypt_page+0x123/0x18c [ecryptfs]
[<ffffffffa029dc54>] ecryptfs_readpage+0xb5/0x111 [ecryptfs]
[<ffffffff810bb9ff>] do_generic_file_read.constprop.15+0x298/0x3c0
[<ffffffff810bc507>] generic_file_aio_read+0x1d8/0x23d
[<ffffffffa029b1b6>] ecryptfs_read_update_atime+0x1c/0x58 [ecryptfs]
[<ffffffff8105cc5d>] ? local_clock+0x14/0x4c
[<ffffffff810ef3e2>] do_sync_read+0xbf/0xff
[<ffffffff8115c9ef>] ? security_file_permission+0x2e/0x33
[<ffffffff810ef727>] ? rw_verify_area+0xb6/0xd3
[<ffffffff810efab4>] vfs_read+0xac/0xf3
[<ffffffff810f0f8b>] ? fget_light+0x3a/0xa1
[<ffffffff810efb48>] sys_read+0x4d/0x74
[<ffffffff810dacf7>] ? vma_adjust+0x1cb/0x34a
[<ffffffff8131ac42>] system_call_fastpath+0x16/0x1b
Code: 49 89 d4 89 cb 4c 89 f7 48 89 45 b8 4c 89 45 c0 c7 45 c8 00 02 00 00 e8 75 44 07 e1 49 8b 45 40 49 8b 55 20 49 8d 75 70 48 89 c7 <ff> 50 10 85 c0 74 27 89 c2 48 c7 c6 a0 69 2a a0 48 c7 c7 6d 8f 
RIP  [<ffffffffa029ebbb>] decrypt_scatterlist+0x54/0xeb [ecryptfs]
RSP <ffff88001d94daf8>
CR2: 0000000000000010
---[ end trace f51d8b8dc850fa89 ]---