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 5.15-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-5.15 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
@@ -1107,6 +1107,12 @@ 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-5.15/md-bcache-check-the-return-value-of-kzalloc-in-detached_dev_do_request.patch
