* [PATCH v2] md: bcache: check the return value of kzalloc() in detached_dev_do_request()
@ 2022-03-03 1:55 Jia-Ju Bai
2022-04-07 17:18 ` Coly Li
0 siblings, 1 reply; 2+ messages in thread
From: Jia-Ju Bai @ 2022-03-03 1:55 UTC (permalink / raw)
To: colyli, kent.overstreet; +Cc: linux-bcache, linux-kernel, Jia-Ju Bai
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>
---
v2:
* Fix the error handling code when ddip is NULL.
Thank Coly for good advice.
---
drivers/md/bcache/request.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/md/bcache/request.c b/drivers/md/bcache/request.c
index d15aae6c51c1..673a680240a9 100644
--- 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;
--
2.17.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH v2] md: bcache: check the return value of kzalloc() in detached_dev_do_request()
2022-03-03 1:55 [PATCH v2] md: bcache: check the return value of kzalloc() in detached_dev_do_request() Jia-Ju Bai
@ 2022-04-07 17:18 ` Coly Li
0 siblings, 0 replies; 2+ messages in thread
From: Coly Li @ 2022-04-07 17:18 UTC (permalink / raw)
To: Jia-Ju Bai; +Cc: linux-bcache, kent.overstreet, linux-kernel
On 3/3/22 9:55 AM, Jia-Ju Bai wrote:
> 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>
> ---
> v2:
> * Fix the error handling code when ddip is NULL.
> Thank Coly for good advice.
>
> ---
> drivers/md/bcache/request.c | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/drivers/md/bcache/request.c b/drivers/md/bcache/request.c
> index d15aae6c51c1..673a680240a9 100644
> --- 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;
Added into my testing queue.
Thanks.
Coly Li
^ permalink raw reply [flat|nested] 2+ messages in thread
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