This is a note to let you know that I've just added the patch titled md: bcache: check the return value of kzalloc() in detached_dev_do_request() to the 5.18-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: md-bcache-check-the-return-value-of-kzalloc-in-detached_dev_do_request.patch and it can be found in the queue-5.18 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 40f567bbb3b0639d2ec7d1c6ad4b1b018f80cf19 Mon Sep 17 00:00:00 2001 From: Jia-Ju Bai <baijiaju1990@xxxxxxxxx> Date: Fri, 27 May 2022 23:28:18 +0800 Subject: md: bcache: check the return value of kzalloc() in detached_dev_do_request() From: Jia-Ju Bai <baijiaju1990@xxxxxxxxx> commit 40f567bbb3b0639d2ec7d1c6ad4b1b018f80cf19 upstream. The function kzalloc() in detached_dev_do_request() can fail, so its return value should be checked. Fixes: bc082a55d25c ("bcache: fix inaccurate io state for detached bcache devices") Reported-by: TOTE Robot <oslab@xxxxxxxxxxxxxxx> Signed-off-by: Jia-Ju Bai <baijiaju1990@xxxxxxxxx> Signed-off-by: Coly Li <colyli@xxxxxxx> Link: https://lore.kernel.org/r/20220527152818.27545-4-colyli@xxxxxxx Signed-off-by: Jens Axboe <axboe@xxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/md/bcache/request.c | 6 ++++++ 1 file changed, 6 insertions(+) --- a/drivers/md/bcache/request.c +++ b/drivers/md/bcache/request.c @@ -1105,6 +1105,12 @@ static void detached_dev_do_request(stru * which would call closure_get(&dc->disk.cl) */ ddip = kzalloc(sizeof(struct detached_dev_io_private), GFP_NOIO); + if (!ddip) { + bio->bi_status = BLK_STS_RESOURCE; + bio->bi_end_io(bio); + return; + } + ddip->d = d; /* Count on the bcache device */ ddip->orig_bdev = orig_bdev; Patches currently in stable-queue which might be from baijiaju1990@xxxxxxxxx are queue-5.18/md-bcache-check-the-return-value-of-kzalloc-in-detached_dev_do_request.patch