lightnvm: pblk: fix race on sysfs line state

Browse source

[ Upstream commit 44cdbdc657 ]

pblk exposes a sysfs interface that represents its internal state. Part
of this state is the map bitmap for the current open line, which should
be protected by the line lock to avoid a race when freeing the line
metadata. Currently, it is not.

This patch makes sure that the line state is consistent and NULL
bitmap pointers are not dereferenced.

Signed-off-by: Javier González <javier@cnexlabs.com>
Signed-off-by: Matias Bjørling <mb@lightnvm.io>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

This commit is contained in:

Javier González 2018-10-09 13:12:07 +02:00 • committed by Greg Kroah-Hartman

parent 5764ffc8a6

commit bd206a06a7

2 changed files with 10 additions and 3 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

5

drivers/lightnvm/pblk-core.c

View file

8

drivers/lightnvm/pblk-sysfs.c

View file