Kernels v4.9+ cause short reads of block devices

[Doug Nazar]

The following commits cause short reads of block devices, however writes 
are still allowed.

c2a9737f45e2 ("vfs,mm: fix a dead loop in truncate_inode_pages_range()")
d05c5f7ba164 ("vfs,mm: fix return value of read() at s_maxbytes")

When e2fsck sees this, it thinks it's a bad sector and tries to write a 
block of nulls which overwrites the valid data.

Device is LVM over 2 x RAID-5 on an old 32bit desktop.

RO    RA   SSZ   BSZ   StartSec            Size   Device
rw  4096   512  4096          0   9748044840960 /dev/Storage/Main

Doug