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md: bcache: check the return value of kzalloc() in detached_dev_do_request()
author
Jia-Ju Bai
<baijiaju1990@gmail.com>
Fri, 27 May 2022 15:28:18 +0000
(23:28 +0800)
committer
Greg Kroah-Hartman
<gregkh@linuxfoundation.org>
Thu, 9 Jun 2022 08:23:32 +0000
(10:23 +0200)
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@tsinghua.edu.cn>
Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Signed-off-by: Coly Li <colyli@suse.de>
Link:
https://lore.kernel.org/r/20220527152818.27545-4-colyli@suse.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/md/bcache/request.c
patch
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diff --git
a/drivers/md/bcache/request.c
b/drivers/md/bcache/request.c
index
6d1de88
..
9f4a285
100644
(file)
--- a/
drivers/md/bcache/request.c
+++ b/
drivers/md/bcache/request.c
@@
-1107,6
+1107,12
@@
static void detached_dev_do_request(struct bcache_device *d, struct bio *bio,
* 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;