Searched hist:"512875 bd9661368da6f993205a61213b79ba1df0" (Results 1 – 4 of 4) sorted by relevance
| /openbmc/linux/drivers/md/ |
| H A D | dm.h | diff 512875bd9661368da6f993205a61213b79ba1df0 Thu Dec 13 08:15:25 CST 2007 Jun'ichi Nomura <j-nomura@ce.jp.nec.com> dm: table detect io beyond device
This patch fixes a panic on shrinking a DM device if there is
outstanding I/O to the part of the device that is being removed.
(Normally this doesn't happen - a filesystem would be resized first,
for example.)
The bug is that __clone_and_map() assumes dm_table_find_target()
always returns a valid pointer. It may fail if a bio arrives from the
block layer but its target sector is no longer included in the DM
btree.
This patch appends an empty entry to table->targets[] which will
be returned by a lookup beyond the end of the device.
After calling dm_table_find_target(), __clone_and_map() and target_message()
check for this condition using
dm_target_is_valid().
Sample test script to trigger oops:
|
| H A D | dm-ioctl.c | diff 512875bd9661368da6f993205a61213b79ba1df0 Thu Dec 13 08:15:25 CST 2007 Jun'ichi Nomura <j-nomura@ce.jp.nec.com> dm: table detect io beyond device
This patch fixes a panic on shrinking a DM device if there is
outstanding I/O to the part of the device that is being removed.
(Normally this doesn't happen - a filesystem would be resized first,
for example.)
The bug is that __clone_and_map() assumes dm_table_find_target()
always returns a valid pointer. It may fail if a bio arrives from the
block layer but its target sector is no longer included in the DM
btree.
This patch appends an empty entry to table->targets[] which will
be returned by a lookup beyond the end of the device.
After calling dm_table_find_target(), __clone_and_map() and target_message()
check for this condition using
dm_target_is_valid().
Sample test script to trigger oops:
|
| H A D | dm-table.c | diff 512875bd9661368da6f993205a61213b79ba1df0 Thu Dec 13 08:15:25 CST 2007 Jun'ichi Nomura <j-nomura@ce.jp.nec.com> dm: table detect io beyond device
This patch fixes a panic on shrinking a DM device if there is
outstanding I/O to the part of the device that is being removed.
(Normally this doesn't happen - a filesystem would be resized first,
for example.)
The bug is that __clone_and_map() assumes dm_table_find_target()
always returns a valid pointer. It may fail if a bio arrives from the
block layer but its target sector is no longer included in the DM
btree.
This patch appends an empty entry to table->targets[] which will
be returned by a lookup beyond the end of the device.
After calling dm_table_find_target(), __clone_and_map() and target_message()
check for this condition using
dm_target_is_valid().
Sample test script to trigger oops:
|
| H A D | dm.c | diff 512875bd9661368da6f993205a61213b79ba1df0 Thu Dec 13 08:15:25 CST 2007 Jun'ichi Nomura <j-nomura@ce.jp.nec.com> dm: table detect io beyond device
This patch fixes a panic on shrinking a DM device if there is
outstanding I/O to the part of the device that is being removed.
(Normally this doesn't happen - a filesystem would be resized first,
for example.)
The bug is that __clone_and_map() assumes dm_table_find_target()
always returns a valid pointer. It may fail if a bio arrives from the
block layer but its target sector is no longer included in the DM
btree.
This patch appends an empty entry to table->targets[] which will
be returned by a lookup beyond the end of the device.
After calling dm_table_find_target(), __clone_and_map() and target_message()
check for this condition using
dm_target_is_valid().
Sample test script to trigger oops:
|