This is a note to let you know that I've just added the patch titled dm log writes: fix check of kthread_run() return value to the 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: dm-log-writes-fix-check-of-kthread_run-return-value.patch and it can be found in the queue-4.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 91e630d9ae6de6f740ef7c8176736eb55366833e Mon Sep 17 00:00:00 2001 From: Vladimir Zapolskiy <vz@xxxxxxxxx> Date: Thu, 10 Mar 2016 01:22:19 +0200 Subject: dm log writes: fix check of kthread_run() return value From: Vladimir Zapolskiy <vz@xxxxxxxxx> commit 91e630d9ae6de6f740ef7c8176736eb55366833e upstream. 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> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/md/dm-log-writes.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/drivers/md/dm-log-writes.c +++ b/drivers/md/dm-log-writes.c @@ -456,9 +456,9 @@ static int log_writes_ctr(struct dm_targ goto bad; } - ret = -EINVAL; lc->log_kthread = kthread_run(log_writes_kthread, lc, "log-write"); - if (!lc->log_kthread) { + if (IS_ERR(lc->log_kthread)) { + ret = PTR_ERR(lc->log_kthread); ti->error = "Couldn't alloc kthread"; dm_put_device(ti, lc->dev); dm_put_device(ti, lc->logdev); Patches currently in stable-queue which might be from vz@xxxxxxxxx are queue-4.4/dm-log-writes-fix-check-of-kthread_run-return-value.patch -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html