From: Vladimir Zapolskiy <vz@xxxxxxxxx>
This patch has been added to the 4.1 stable tree. If you have any
objections, please let us know.
===============
[ Upstream commit 91e630d9ae6de6f740ef7c8176736eb55366833e ]
The kthread_run() function returns either a valid task_struct or
ERR_PTR() value, check for NULL is invalid. This change fixes potential
for oops, e.g. in OOM situation.
Signed-off-by: Vladimir Zapolskiy <vz@xxxxxxxxx>
Signed-off-by: Mike Snitzer <snitzer@xxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx>
---
drivers/md/dm-log-writes.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/md/dm-log-writes.c b/drivers/md/dm-log-writes.c
index f8c4e4e..9e136ba 100644
--- a/drivers/md/dm-log-writes.c
+++ b/drivers/md/dm-log-writes.c
@@ -456,7 +456,7 @@ static int log_writes_ctr(struct dm_target *ti, unsigned int argc, char **argv)
}
lc->log_kthread = kthread_run(log_writes_kthread, lc, "log-write");
- if (!lc->log_kthread) {
+ if (IS_ERR(lc->log_kthread)) {
ti->error = "Couldn't alloc kthread";
dm_put_device(ti, lc->dev);
dm_put_device(ti, lc->logdev);
--
2.7.4
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