------- Comment From [email protected] 2016-03-08 15:11 EDT-------
Script to trigger the problem
(from comments #35 #36)

# cat <<"EOF" >test-bz136788.sh
#!/bin/sh
set -ex

DEVICE="$1"
[ -n "$DEVICE" ]

parted -s $DEVICE mklabel msdos
parted -s -a optimal $DEVICE mkpart primary 0% 12%
parted -s -a optimal $DEVICE mkpart primary 12% 24%
parted -s -a optimal $DEVICE mkpart primary 24% 36%
parted -s -a optimal $DEVICE mkpart extended 36% 100%
parted -s -a optimal $DEVICE mkpart logical 36% 48%
parted -s -a optimal $DEVICE mkpart logical 48% 60%
parted -s -a optimal $DEVICE mkpart logical 60% 72%
parted -s -a optimal $DEVICE mkpart logical 72% 84%
parted -s -a optimal $DEVICE mkpart logical 84% 96%
parted -s $DEVICE print
EOF

# chmod +x test-bz136788.sh

# while true; do ./test-bz136788.sh /dev/sdc; done

Then, after a short 'while' (pun intended):

...
+ parted -s -a optimal /dev/sdc mkpart primary 24% 36%
[  669.234353] Unable to handle kernel paging request for data at address 
0x7760d0000
[  669.234400] Faulting instruction address: 0xc000000000532010
cpu 0x19: Vector: 300 (Data Access) at [c0000006d8b3b560]
pc: c000000000532010: blk_account_io_start+0x150/0x290
lr: c000000000531fec: blk_account_io_start+0x12c/0x290
...

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https://bugs.launchpad.net/bugs/1546439

Title:
  ISST:LTE: Regression: roselp2 Oops in kernel during setup io

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