| From | Greg Kroah-Hartman <> | Subject | [PATCH 5.4 280/411] md: bcache: check the return value of kzalloc() in detached_dev_do_request() | Date | Mon, 13 Jun 2022 12:09:13 +0200 |
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From: Jia-Ju Bai <baijiaju1990@gmail.com>
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 | 6 ++++++ 1 file changed, 6 insertions(+)
--- a/drivers/md/bcache/request.c +++ b/drivers/md/bcache/request.c @@ -1119,6 +1119,12 @@ 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; ddip->start_time = jiffies; ddip->bi_end_io = bio->bi_end_io;
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